The ADM1186-1 and ADM1186-2 are integrated, four-channel, voltage monitoring and sequencing devices. A 2.7 V to 5.5 V power supply is required on the VCC pin for power.Four precision comparators monitor four voltage rails, with all comparators sharing a 0.6 V reference and a worst-case accuracy of 0.8%. Resistor networks that are external to the VIN1, VIN2, VIN3, and VIN4 pins set the Under Voltage (UV) trip points for the monitored supply rails.The ADM1186-1 and ADM1186-2 have four open drain enable outputs, OUTx, that are used to enable power supplies. An open drain power good output, PWRGD, is provided that indicatesthe four VINx inputs are above their UV thresholds.A state machine monitors the state of the UP and?DOWN pins on the ADM1186-1 or the UP/overbar: DOWN pin on the ADM1186-2 to control the supply sequencing direction. In the ?Wait Start?state, a rising edge transition on the UP or UP/DOWN pin triggers a power-up sequence. A falling edge transition on the DOWN or UP/DOWN pin in the ?Power Up Done? statetriggers a power down sequence.During a power up sequence, the state machine enables each power supply in turn. The supply output voltage is monitored to determine if it rises above the UV threshold level within a userdefined duration called the blanking time. If a supply rises above the UV threshold then the next enable output in the sequence is turned on. In addition to the blanking time a user may also define sequencing time delays between each enable output turning on. When all four enable outputs are on, and the four VINx pins are above their UV trip points the power up sequence is complete. The ADM1186-1 provides an open drain pin, SEQ_DONE, that is asserted high to provide an indication that an up sequence is complete. The SEQ_DONE pins is allows multiple cascadedADM1186-1 devices to be perform controlled power up and down sequences. During a power down sequence the enable outputs turn off inreverse order. The sequence time delays between successive supplies the same as during the power up sequence, and no blanking time is used during a power down sequence. At the end of a down sequence the SEQ_DONE pin is brought low. During sequencing and when powered up, the state machine continuously monitors for any fault conditions. Faults include a UV condition on any of the inputs, or an unexpected controlinput. Any fault that occurs causes the state machine to enter a fault handler. This immediately turns off all enable outputs, and ensures that the device is ready to start a new up sequence. The ADM1186-1 has a bi-directional open drain pin, FAULT, that facilitates fault handling when using multiple devices. An ADM1186-1 experiencing a fault condition drives the FAULT pin low, causing other connected ADM1186-1devices to enter their own fault handling state.The ADM1186-1 is available in a 20-lead QSOP package andthe ADM1186-2 is available in a 16-lead QSOP package.

The ADM1186-1 and ADM1186-2 are integrated, four-channel, voltage monitoring and sequencing devices. A 2.7 V to 5.5 V power supply is required on the VCC pin for power.Four precision comparators monitor four voltage rails, with all comparators sharing a 0.6 V reference and a worst-case accuracy of 0.8%. Resistor networks that are external to the VIN1, VIN2, VIN3, and VIN4 pins set the Under Voltage (UV) trip points for the monitored supply rails.The ADM1186-1 and ADM1186-2 have four open drain enable outputs, OUTx, that are used to enable power supplies. An open drain power good output, PWRGD, is provided that indicatesthe four VINx inputs are above their UV thresholds.A state machine monitors the state of the UP and?DOWN pins on the ADM1186-1 or the UP/overbar: DOWN pin on the ADM1186-2 to control the supply sequencing direction. In the ?Wait Start?state, a rising edge transition on the UP or UP/DOWN pin triggers a power-up sequence. A falling edge transition on the DOWN or UP/DOWN pin in the ?Power Up Done? statetriggers a power down sequence.During a power up sequence, the state machine enables each power supply in turn. The supply output voltage is monitored to determine if it rises above the UV threshold level within a userdefined duration called the blanking time. If a supply rises above the UV threshold then the next enable output in the sequence is turned on. In addition to the blanking time a user may also define sequencing time delays between each enable output turning on. When all four enable outputs are on, and the four VINx pins are above their UV trip points the power up sequence is complete. The ADM1186-1 provides an open drain pin, SEQ_DONE, that is asserted high to provide an indication that an up sequence is complete. The SEQ_DONE pins is allows multiple cascadedADM1186-1 devices to be perform controlled power up and down sequences. During a power down sequence the enable outputs turn off inreverse order. The sequence time delays between successive supplies the same as during the power up sequence, and no blanking time is used during a power down sequence. At the end of a down sequence the SEQ_DONE pin is brought low. During sequencing and when powered up, the state machine continuously monitors for any fault conditions. Faults include a UV condition on any of the inputs, or an unexpected controlinput. Any fault that occurs causes the state machine to enter a fault handler. This immediately turns off all enable outputs, and ensures that the device is ready to start a new up sequence. The ADM1186-1 has a bi-directional open drain pin, FAULT, that facilitates fault handling when using multiple devices. An ADM1186-1 experiencing a fault condition drives the FAULT pin low, causing other connected ADM1186-1devices to enter their own fault handling state.The ADM1186-1 is available in a 20-lead QSOP package andthe ADM1186-2 is available in a 16-lead QSOP package.

The ADM1192 is an integrated current sense amplifier that offers digital current and voltage monitoring via an on-chip, 12-bit analog-to-digital converter (ADC), communicated through an I2C interface.An internal current sense amplifier senses voltage across the sense resistor in the power path via the VCC pin and the SENSE pin.A 12-bit ADC can measure the current seen in the sense resistor and in the supply voltage on the VCC pin. An industry-standard I2C interface allows a controller to read current and voltage data from the ADC. Measurements can be initiated by an I2C command. Alternatively, the ADC can run continuously, and the user can read the latest conversion data whenever it is required. Up to four unique I2C addresses can be created, depending on the way the ADR pin is connected.A SETV pin is also included. A voltage applied to this pin is internally compared to the output voltage on the current sense amplifier. The output of the SETV comparator asserts when the current sense amplifier output exceeds the SETV voltage. This event is detected at the ALERT block. The ALERT block then charges up the external TIMER capacitor with a fixed current. When this timing cycle is complete, the ALERT output asserts.The ALERT output can be used as a flag to warn a micro-controller or field programmable gate array (FPGA) of an overcurrent condition. ALERT outputs of multiple ADM1192 devices can be tied together and used as a combined alert.A basic P-channel FET hot swap circuit can be implemented with the ALERT output. The value of the TIMER capacitor should be set so that the charging time of this capacitor is much longer than the period where a higher than nominal inrush current may be flowing.The ADM1192 is packaged in a 10-lead MSOP.APPLICATIONS Power monitoring/power budgeting Central office equipment Telecommunication and data communication equipment PCs/servers

The ADM1293 and ADM1294 are high accuracy integrated digital power monitors that offer digital current, voltage, and power monitoring using an on-chip, 12-bit analog-to-digital converter (ADC), communicated through a PMBus? compliant I2C interface.These devices acquire the current by measuring the voltage difference across the external sense resistor. This voltage is amplified and digitized by an internal 12-bit ADC. The same ADC can also sample the primary input voltage and an auxiliary input voltage. The internal digital block can perform multiplication of the current and primary input voltage for power calculation. The ADM1293/ADM1294 also feature a power accumulator for energy metering. An industry-standard PMBus interface allows a master controller to read back these data from the device. The master controller can then combine this information with a known sense resistor value to calculate the current, voltage, power, and energy consumption over time on the monitored rail.In conditions such as overcurrent, overvoltage, undervoltage, and overpower, the ADM1293/ADM1294 devices can generate an interrupt signal to the microprocessor through the GPOx/ALERTx outputs. The threshold for these conditions is digitally programmed via PMBus.The ADM1293 is designed for high-side supply monitoring with a voltage monitoring range from 0 V to 20 V. The ADM1294 is designed for low-side supply monitoring. Its integrated shunt regulator allows it to be powered and to monitor supply in wide voltage ranges.The ADM1293/ADM1294 are available in 4 mm ? 4 mm 16-lead LFCSP and 14-lead TSSOP packages with a specified operating ambient temperature range from ?40?C to +105?C for the ADM1293 and an operating junction temperature range from ?40?C to +105?C for the ADM1294.Applications Power monitoring/power budgeting Central office equipment Telecommunications and data communications equipment PCs/servers

The ADM2461E/ADM2463E are 500 kbps, 5.7 kV rms, signal isolated RS-485 transceivers that pass radiated emissions testing to the EN55032 Class B standard with margin on a 2-layer printed circuit board (PCB). The ADM2461E/ADM2463E isolation barrier provides robust immunity to noise and system level EMC events. The devices are protected against ??12 kV contact and ? ?15 kV air IEC61000-4-2 electrostatic discharge (ESD) events on the RS-485 A, B, Y, and Z pins. The devices feature cable invert pins to allow quick correction of the reversed cable connection on the A, B, Y, and Z bus pins while maintaining full receiver fail-safe performance.?These devices are optimized for low speed over long cable runs and have a maximum data rate of 500 kbps. The high differential output voltage makes these devices suitable for Profibus nodes when powered with 5 V on the VDD2 supply. The VDD1 primary supply and VDD2 isolated supply both support a wide range of voltages (1.7 V to 5.5 V and 3 V to 5.5 V, respectively). Half-duplex and full duplex device options are available in the industry standard 16-lead, wide-body, standard SOIC_W package with >8.0 mm creepage and clearance.?Applications Heating, ventilation, and air conditioning (HVAC) networks Industrial field buses Building automation Utility networks

The ADM2484E is an isolated data transceiver with ?15 kVESD protection suitable for high speed, half- or full-duplex communication on multipoint transmission lines. For half-duplex operation, the transmitter outputs and receiver inputs share the same transmission line. Transmitter Output Pin Y links externally to Receiver Input Pin A, and Transmitter Output Pin Z links externally to Receiver Input Pin B.Designed for balanced transmission lines, the ADM2484Ecomplies with ANSI TIA/EIA RS-485-A-1998 and ISO 8482: 1987(E). The device employs Analog Devices, Inc., iCoupler? technology to combine a 3-channel isolator, a three-state differential line driver, and a differential input receiver into a single package.The differential transmitter outputs and receiver inputs featureelectrostatic discharge circuitry that provides protection up to ?15 kV using the human body model (HBM). The logic side of the device can be powered with either a 5 V or a 3.3 V supply, whereas the bus side requires an isolated 3.3 V supply.The device has current-limiting and thermal shutdown featuresto protect against output short circuits and situations where buscontention causes excessive power dissipation.Applications Isolated RS-485/RS-422 interfaces Industrial field networks INTERBUS Multipoint data transmission systems

The ADM2485 differential bus transceiver is an integrated, galvanically isolated component designed for bidirectional data communication on multipoint bus transmission lines. It is designed for balanced transmission lines and complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E).The device employs Analog Devices, Inc., iCoupler? technology to combine a 3-channel isolator, a three-state differential line driver, and a differential input receiver into a single package. An on-chip oscillator outputs a pair of square waveforms that drive an external transformer to provide isolated power with an external transformer. The logic side of the device can be powered with either a 5 V or a 3.3 V supply, and the bus side is powered with an isolated 5 V supply.The ADM2485 driver has an active high enable. The driver differential outputs and the receiver differential inputs are connected internally to form a differential input/output port that imposes minimal loading on the bus when the driver is disabled or when VDD1 or VDD2 = 0 V. Also provided is an active high receiver disable that causes the receive output to enter a high impedance state.The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention might cause excessive power dissipation. The part is fully specified over the industrial temperature range and is available in a 16-lead, wide-body SOIC package.Applications Isolated RS-485/RS-422 interfaces PROFIBUS networks Industrial field networks Multipoint data transmission systems

The AD5590 is a 16-channel input and 16-channel output analog I/O port with eight uncommitted amplifiers, operating from a single 4.5 V to 5.25 V supply. The AD5590 comprises 16 input channels multiplexed into a 1 MSPS, 12-bit successive approximation ADC with a sequencer to allow a preprogrammed selection of channels to be converted sequentially. The ADC contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 1 MHz.The conversion process and data acquisition are controlled using ASYNC and the serial clock signal, allowing the device to easily interface with microprocessors or DSPs. The input signal is sampled on the falling edge of ASYNC and conversion is also initiated at this point. There are no pipeline delays associated with the ADC. By setting the relevant bits in the control register, the analog input range for the ADC can be selected to be a 0 V to VREFA input or a 0 V to 2 ? VREFA with either straight binary or twos complement output coding. The conversion time is determined by the ASCLK frequency because it is also used as the master clock to control the conversion.The DAC section of the AD5590 comprises sixteen 12-bit DACs divided into two groups of eight. Each group has an on-chip reference. The on-board references are off at power-up, allowing the use of external references. The internal references are enabled via a software write.The AD5590 incorporates a power-on reset circuit that ensures that the DAC outputs power up to 0 V and remain powered up at this level until a valid write takes place. The DAC contains a power-down feature that reduces the current consumption of the device and provides software-selectable output loads while in power-down mode for any or all DAC channels. The outputs of all DACs can be updated simultaneously using the LDAC function, with the added functionality of user-selectable DAC channels to simultaneously update. There is also an asynchronous CLR that updates all DACs to a user-programmable code: zero scale, midscale, or full scale.The AD5590 contains eight low noise, single-supply amplifiers. These amplifiers can be used for signal conditioning for the ADCs, DACs, or other independent circuitry, if required.APPLICATIONS Optical Line Cards (Monitoring and Control) Base Stations General Purpose Analog I/O Monitoring and control

The AD5593R has eight input/output (I/O) pins, which can beindependently configured as digital-to-analog converter (DAC)outputs, analog-to-digital converter (ADC) inputs, digital outputs,or digital inputs. When an I/O pin is configured as an analogoutput, it is driven by a 12-bit DAC. The output range of theDAC is 0 V to VREF or 0 V to 2 ? VREF. When an I/O pin isconfigured as an analog input, it is connected to a 12-bit ADCvia an analog multiplexer. The input range of the ADC is 0 V toVREF or 0 V to 2 ? VREF. The I/O pins can also be configured tobe general-purpose, digital input or output (GPIO) pins. Thestate of the GPIO pins can be set or read back by accessing theGPIO write data register and GPIO read configuration registers,respectively, via an I2C write or read operation.The AD5593R has an integrated 2.5 V, 20 ppm/?C reference thatis turned off by default and an integrated temperature indicatorthat gives an indication of the die temperature. The temperaturevalue is read back as part of an ADC read sequence.The AD5593R is available in 16-lead TSSOP and LFCSP, as wellas a 16-ball WLCSP, and operates over a temperature range of?40?C to +105?C.Applications Control and monitoring General-purpose analog and digital I/O

The AD5668 device is a low power, octal, 16-bit, buffered voltage-output DAC. All devicesoperate from a single 2.7 V to 5.5 V supply and are guaranteedmonotonic by design. The AD5668 and AD5628 are available inboth a 4 mm ? 4 mm LFCSP and a 16-lead TSSOP, while theAD5648 is available in both a 14-lead and 16-lead TSSOP.The AD5628/AD5648/AD5668 have an on-chip reference withan internal gain of 2. The AD5628-1/AD5648-1/AD5668-1 havea 1.25 V 5 ppm/?C reference, giving a full-scale output rangeof 2.5 V; the AD5628-2/AD5648-2/AD5668-2 and AD5668-3 havea 2.5 V 5 ppm/?C reference, giving a full-scale output range of5 V. The on-board reference is off at power-up, allowing the useof an external reference. The internal reference is enabled via asoftware write.The part incorporates a power-on reset circuit that ensures that theDAC output powers up to 0 V (AD5628-1/AD5648-1/AD5668-1,AD5628-2/AD5648-2/AD5668-2) or midscale (AD5668-3) andremains powered up at this level until a valid write takes place.The part contains a power-down feature that reduces the currentconsumption of the device to 400 nA at 5 V and provides software-selectable output loads while in power-down mode for any or allDAC channels. The outputs of all DACs can be updated simultaneouslyusing the LDAC function, with the added functionalityof user-selectable DAC channels to simultaneously update. Thereis also an asynchronous CLR that updates all DACs to a userprogrammablecode?zero scale, midscale, or full scale.The AD5628/AD5648/AD5668 utilize a versatile 3-wire serialinterface that operates at clock rates of up to 50 MHz and iscompatible with standard SPI?, QSPI?, MICROWIRE?, andDSP interface standards. The on-chip precision output amplifierenables rail-to-rail output swing.Product Highlights Octal, 12-/14-/16-bit DAC. On-chip 1.25 V/2.5 V, 5 ppm/?C reference. Available in 14-lead/16-lead TSSOP, 16-lead LFCSP, and 16-ball WLCSP. Power-on reset to 0 V or midscale. Power-down capability. When powered down, the DAC typically consumes 200 nA at 3 V and 400 nA at 5 V. Applications Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators

The AD5671R/AD5675R are low power, octal, 12-/16-bit buffered voltage output digital-to-analog converters (DACs). They include a 2.5 V, 2 ppm/?C internal reference (enabled by default) and a gain select pin giving a full-scale output of 2.5 V (gain = 1) or 5 V (gain = 2). The devices operate from a single 2.7 V to 5.5 V supply and are guaranteed monotonic by design. The AD5671R/AD5675R are available in a 20-lead TSSOP and in a 20-lead LFCSP and incorporate a power-on reset circuit and a RSTSEL pin that ensures the DAC outputs power up to zero scale or midscale and remain there until a valid write. The AD5671R/AD5675R contain a power-down mode, reducing the current consumption to 1 ?A typical while in power-down mode.Product Highlights High Relative Accuracy (INL). AD5671R (12-bit): ?1 LSB maximum AD5675R (16-bit): ?3 LSB maximum Low Drift 2.5 V On-Chip ReferenceApplications Optical transceivers Base-station power amplifiers Process control (PLC input/output cards) Industrial automation Data acquisition systems

The AD5674/AD5674R/AD5679/AD5679R are low power,?16-channel, 12-/16-bit, buffered voltage output, digital-to-analog converters (DACs) that include a 2.5 V, 2 ppm/?C internal reference (enabled by default), and a gain select pin, resulting in a full-scale output of 2.5 V (gain = 1) or 5 V (gain = 2). The?devices operate from a single, 2.7 V to 5.5 V supply range and?are guaranteed monotonic by design. The AD5674/AD5674R/AD5679/AD5679R are available in a 28-lead lead frame chip scale package (LFCSP) and incorporate a power-on reset (POR) circuit that ensures that the DAC outputs power up to and remains at zero-scale or midscale until a valid write. The AD5674/AD5674R/AD5679/AD5679R contain a power-down mode that reduces the current?consumption to 2 ?A typical.Product Highlights High channel density: 16 channels in 4 mm ? 4 mm?LFCSP. High relative accuracy (integral nonlinearity (INL)) ?4 LSB maximum. Low drift, 2.5 V, on-chip reference.Applications Optical transceivers Base station power amplifiers Process control (programmable logic controller (PLC) input/output cards) Industrial automation Data acquisition systems

The AD5683R/AD5682R/AD5681R/AD5683, members of thenanoDAC+? family, are low power, single-channel, 16-/14-/12-bitbuffered voltage out digital-to-analog converters (DACs). Thedevices, except the AD5683, include an enabled by default internal2.5 V reference, offering 2 ppm/?C drift. The output span can beprogrammed to be 0 V to VREF or 0 V to 2 ? VREF. All devicesoperate from a single 2.7 V to 5.5 V supply and are guaranteedmonotonic by design. The devices are available in a 2.00 mm ?2.00 mm, 8-lead LFCSP or a 10-lead MSOP.The internal power-on reset circuit ensures that the DAC registeris written to zero scale at power-up while the internal outputbuffer is configured in normal mode. TheAD5683R/AD5682R/AD5681R/AD5683 contain a power-downmode that reduces the current consumption of the device to 2 ?A(maximum) at 5 V and provides software selectable output loadswhile in power-down mode.The AD5683R/AD5682R/AD5681R/AD5683 use a versatile3-wire serial interface that operates at clock rates of up to 50 MHz.Some devices also include asynchronous RESET pin and VLOGICpin options, allowing 1.8 V compatibilityProduct Highlights High Relative Accuracy (INL). AD5683R/AD5683 (16-bit): ?2 LSB maximum. Low Drift, 2.5 V On-Chip Reference. 2 ppm/?C typical temperature coefficient. 5 ppm/?C maximum temperature coefficient. Two Package Options. 2.00 mm ? 2.00 mm, 8-lead LFCSP. 10-lead MSOP.Applications Process controls Data acquisition systems Digital gain and offset adjustment Programmable voltage sources

The AD5724R/AD5734R/AD5754R are quad, 12-/14-/16-bit serial input, voltage output, digital-to-analog converters (DACs). They operate from single supply voltages of +4.5 V up to +16.5 V or dual supply voltages from ?4.5 V up to ?16.5 V. Nominal full-scale output range is software selectable from +5 V, +10 V, +10.8 V, ?5 V, ?10 V, or ?10.8 V. Integrated output amplifiers, reference buffers, and proprietary power-up/power-down control circuitry are also provided.The devices offer guaranteed monotonicity, integral nonlinearity (INL) of ?16 LSB maximum, low noise, 10 ?s typical settling time, and an on-chip +2.5 V reference.The AD5724R/AD5734R/AD5754R use a serial interface that operates at clock rates up to 30 MHz and are compatible with DSP and microcontroller interface standards. Double buffering allows the simultaneous updating of all DACs. The input coding is user-selectable twos complement or offset binary for a bipolar output (depending on the state of Pin BIN/2sCOMP) and straight binary for a unipolar output. The asynchronous clear function clears all DAC registers to a user-selectable zero-scale or mid-scale output. The parts are available in a 24-lead TSSOP and offer guaranteed specifications over the ?40?C to +85?C industrial temperature range.Applications Industrial automation Closed-loop servo control, process control Automotive test and measurement Programmable logic controllers

The AD5760 is a true 16-bit, unbuffered voltage out DAC that operates from a bipolar supply up to 33V. The AD5760 accepts a positive reference input in the range of 5V to VDD ? 2.5V and a negative reference input in the range of VSS + 2.5v to 0V. The AD5760 offers relative accuracy of +/-0.5 LSB max and operation is guaranteed monotonic with a ?0.5 LSB DNL max range specification.The part uses a versatile 3-wire serial interface that operates at clock rates of up to 35 MHz and is compatible with standard SPI, QSPI?, MICROWIRE?, and DSP interface standards. The part incorporates a power-on reset circuit that ensures the DAC output powers up to 0V in a known output impedance state and remains in this state until a valid write to the device takes place. The part provides an output clamp feature that places the output in a defined load state.PRODUCT HIGHLIGHTS True 16-Bit Accuracy. Wide Power Supply Range of Up to ?16.5 V. ?40?C to +125?C Operating Temperature Range. Low 8 nV/?Hz Noise. Low 0.018 ppm/?C gain error temperature coefficient.APPLICATIONS Medical instrumentation Test and measurement Industrial control Scientific and aerospace instrumentation Data acquisition systems Digital gain and offset adjustment Power supply control

The AD5790?is a single 20-bit, voltage out DAC that operates from a bipolar supply up to 33V. Reference buffers are also provided on-chip The AD5790 accepts a positive reference input in the range of 5V to VDD ? 2.5V and a negative reference input in the range of VSS + 2.5v to 0V. The AD5790 offers a relative accuracy of +/-2 LSB's max and operation is guaranteed monotonic with a -1 LSB to +3 LSB's DNL specification.The part uses a versatile 3-wire serial interface that operates at clock rates up to 35 MHz and is compatible with standard SPI?, QSPI?, MICROWIRE?, and DSP interface standards. The part incorporates a power-on reset circuit that ensures the DAC output powers up to 0V and in a known output impedance state and remains in this state until a valid write to the device takes place. The part provides a disable feature that places the output in a defined load state.PRODUCT HIGHLIGHTS 20-bit resolution Wide power supply range of up to ?16.5 V. ?40?C to +125?C operating temperature range. Low 8 nV/?Hz noise. Low ?0.018 ppm/?C gain error temperature coefficient.APPLICATIONS Medical instrumentation Test and measurement Industrial control Scientific and aerospace instrumentation Data acquisition systems Digital gain and offset adjustment Power supply control

The AD57911 is a single 20-bit, unbuffered voltage-output DACthat operates from a bipolar supply of up to 33 V. The AD5791accepts a positive reference input in the range 5 V to VDD ? 2.5 Vand a negative reference input in the range VSS + 2.5 V to 0 V.The AD5791 offers a relative accuracy specification of ?1 LSBmax, and operation is guaranteed monotonic with a ?1 LSBdifferential nonlinearity (DNL) maximum specification.The device uses a versatile 3-wire serial interface that operates atclock rates up to 35 MHz and that is compatible with standardserial peripheral interface (SPI), QSPI?, MICROWIRE?, and DSP interface standards. The device incorporates a power-on reset circuit that ensures the DACoutput powers up to 0 V and in a known output impedance stateand remains in this state until a valid write to the device takesplace. The device provides an output clamp feature that places the outputin a defined load state.Product Highlights 1 ppm Accuracy. Wide Power Supply Range up to ?16.5 V. Operating Temperature Range: ?40?C to +125?C. Low 7.5 nV/?Hz Noise Spectral Density. Low 0.05 ppm/?C Temperature Drift.Applications Medical instrumentation Test and measurement Industrial control High end scientific and aerospace instrumentation1 Protected by U.S. Patent No. 7,884,747. Other patents pending.

The AD5821A is a single, 10-bit digital-to-analog converter (DAC) with output current sinking capability of 120 mA. It features an internal reference and operates from a single 2.7 V to 5.5 V supply. The DAC is controlled via a 2-wire, I2C?-compatible serial interface that operates at clock rates up to 400 kHz.The AD5821A incorporates a power-on reset circuit that ensures the DAC output powers up to 0 V and remains there until a valid write takes place. It has a power-down feature that reduces the current consumption of the device to 1 ?A maximum.The AD5821A is designed for autofocus, image stabilization, and optical zoom applications in camera phones, digital still cameras, and camcorders.The AD5821A is also suitable for many industrial applications, such as controlling temperature, light, and movement without derating over temperatures ranging from ?30?C to +85?C.The I2C 7-bit address for the AD5821A is 0xC.

The AD5930 is a waveform generator with programmable frequency sweep and output burst capability. Utilizing embedded digital processing that allows enhanced frequency control, the device generates synthesized analog or digital frequency-stepped waveforms. Because frequency profiles are preprogrammed, continuous write cycles are eliminated and thereby free up valuable DSP/microcontroller resources. Waveforms start from a known phase and are incremented phase continuously, which allows phase shifts to be easily determined. Consuming only 8 mA, the AD5930 provides a convenient low power solution to waveform generation.The AD5930 can be operated in a variety of modes. In continuous output mode, the device outputs the required frequency for a defined length of time and then steps to the next frequency. The length of time the device outputs a particular frequency is either preprogrammed and the device increments the frequency automatically, or, alternatively, is incremented externally via the CTRL pin. In burst mode, the device outputs its frequency for a length of time and then returns to midscale for a further predefined length of time before stepping to the next frequency. When the MSBOUT pin is enabled, a digital output is generated.To program the device, the user enters the start frequency, the increment step size, the number of increments to be made, and the time interval that the part outputs each frequency. The frequency sweep profile is initiated, started, and executed by toggling the CTRL pin.A number of different sweep profiles are offered. Frequencies can be stepped in triangular-sweep mode, which continuously sweeps up and down through the frequency range. Alternatively, in saw-sweep mode, the frequency is swept up through the frequency range, but returns to the initial frequency before executing the sweep again. In addition, a single frequency or burst can be generated without any sweep.The AD5930 is written to via a 3-wire serial interface, which operates at clock rates up to 40 MHz. The device operates with a power supply from 2.3 V to 5.5 V. Note that AVDD and DVDD are independent of each other and can be operated from different voltages. The AD5930 also has a standby function, which allows sections of the device that are not being used to be powered down.The AD5930 is available in a 20-lead pb-free TSSOP package.Applications Frequency sweeping/radar Network/impedance measurements Incremental frequency stimulus Sensory applications Proximity and motion BFSK Frequency bursting/pulse trains

The AD5940 and AD5941 are high precision, low power analog front ends (AFEs) designed for portable applications that require high precision, electrochemical-based measurement techniques, such as amperometric, voltammetric, or impedance measurements. The AD5940/AD5941 is designed for skin impedance and body impedance measurements, and works with the AD8233 AFE in a complete bioelectric or biopotential measurement system. The AD5940/AD5941 is designed for electrochemical toxic gas sensing.The AD5940/AD5941 consist of two high precision excitation loops and one common measurement channel, which enables a wide capability of measurements of the sensor under test. The first excitation loop consists of an ultra low power, dual-output string, digital-to-analog converter (DAC), and a low power, low noise potentiostat. One output of the DAC controls the noninverting input of the potentiostat, and the other output controls the noninverting input of the transimpedance amplifier (TIA). This low power excitation loop is capable of generating signals from dc to 200 Hz.The second excitation loop consists of a 12-bit DAC, referred to as the high speed DAC. This DAC is capable of generating high frequency excitation signals up to 200 kHz.The AD5940/AD5941 measurement channel features a 16-bit, 800 kSPS, multichannel successive approximation register (SAR) analog-to-digital converter (ADC) with input buffers, a built in antialias filter, and a programmable gain amplifier (PGA). An input multiplexer (mux) in front of the ADC allows the user to select an input channel for measurement. These input channels include multiple external current inputs, external voltage inputs, and internal channels. The internal channels allow diagnostic measurements of the internal supply voltages, die temperature, and reference voltages.The current inputs include two TIAs with programmable gain and load resistors for measuring different sensor types. The first TIA, referred to as the low power TIA, measures low bandwidth signals. The second TIA, referred to as the high speed TIA, measures high bandwidth signals up to 200 kHz.An ultra low leakage, programmable switch matrix connects the sensor to the internal analog excitation and measurement blocks. This matrix provides an interface for connecting external transimpedance amplifier resistors (RTIAs) and calibration resistors. The matrix can also be used to multiplex multiple electronic measurement devices to the same wearable electrodes.A precision 1.82 V and 2.5 V on-chip reference source is available. The internal ADC and DAC circuits use this on-chip reference source to ensure low drift performance for the 1.82 V and 2.5 V peripherals.The AD5940/AD5941 measurement blocks can be controlled via direct register writes through the serial peripheral interface (SPI) interface, or, alternatively, by using a preprogrammable sequencer, which provides autonomous control of the AFE chip. 6 kB of static random access memory (SRAM) is partitioned for a deep data first in, first out (FIFO) and command FIFO. Measurement commands are stored in the command FIFO and measurement results are stored in the data FIFO. A number of FIFO related interrupts are available to indicate when the FIFO is full.A number of general-purpose inputs/outputs (GPIOs) are available and controlled using the AFE sequencer. The AFE sequencer allows cycle accurate control of multiple external sensor devices.The AD5940/AD5941 operate from a 2.8 V to 3.6 V supply and are specified over a temperature range of ?40?C to +85?C. The AD5940 is packaged in a 56-lead, 3.6 mm ? 4.2 mm WLCSP. The AD5941 is packaged in a 48-lead LFCSP.APPLICATIONS Electrochemical measurements Electrochemical gas sensors Potentiostat/amperometric/voltammetry/cyclic voltammetry Bioimpedance applications Skin impedance Body impedance Continuous glucose monitoring Battery impedance