LTC7803EMSE Demo Board | High Frequency, Low IQ Synchronous Step-Down Controller
Analog Devices Inc.Demonstration circuit DC2834A is a DC/DC synchronous step-down converter featuring the LTC7803 (MSE package), a spread spectrum or constant frequency current
mode synchronous step-down controller. The DC2834A generates a 3.3V of output voltage.
The 500kHz constant switching frequency operation results in a small and efficient circuit.
The converter provides high output voltage accuracy (typically ±2%) over wide load range with no minimum load requirement.
The DC2834A supports two ways of biasing the controller: directly from the input voltage or output rail through EXTVCC. The third possibility is connecting an
external voltage source to EXTVCC terminal.
The DC2834A supports extremely wide switching frequency range from 100kHz to 3MHz. The spread spectrum operation reduces the peak radiated and conducted
noise to simplify compliance with electromagnetic interference (EMI) standards.
The DC2834A has a small circuit footprint, is a high performance and high density solution for telecom, automotive and Power over Ethernet applications.
DC2839A
Analog Devices Inc.The LTC6115 is a versatile combination of a high voltage, high side current sense amplifier and a voltage sense amplifier. Design flexibility is provided by the excellent device characteristics: ?500?V maximum offset voltage for current sense and maximum ?0.15% voltage sense total gain error.The current sensing part of the LTC6115 monitors current by sensing the voltage across an external sense resistor. The sensed voltage is converted to an output current which can then be translated to a voltage by an external resistor, ROUT. Due to its fast response, it is a perfect choice for load current warning and shut-off protection control.The LTC6115 also includes an internal 1M? resistor divider and a precision voltage amplifier for accurate voltage monitoring. The resistor attenuation of 40 enables sensing of up to 100V on the VIN pin, making it suitable for precision high voltage monitoring in telecommunications, industrial and automotive applications. The full-scale output voltage can be configured by external gain resistors to maximize use of the amplifier?s rail-to-rail output. The LTC6115 is available in a 12-lead MSOP package.Applications Current Shunt Measurement Battery Monitoring Power Management Automotive Sensing and Control Industrial Monitoring
LTM4680EY | Dual 30A or Single 60A μModule Regulator with Digital Power System Management
Analog Devices Inc.Demonstration circuit 2845A features the LTM4680, which is a dual 30A or single 60A μModule® regulator with 4.5V to 16V input range. The two channels of the LTM4680 are paralleled on this board, so it can deliver 60A maximum load current. The output voltage is adjustable from 0.5V to 3.3V. Please see LTM4680 data sheet for more detailed information.
DC2845A powers up to default settings and produces power based on configuration resistors without the need for any serial bus communication. This allows easy evaluation of the DC/DC converter. To fully explore the extensive power system management features of the part, download the GUI software LTpowerPlay® onto your PC and use ADI I2C/SMBus/PMBus dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on-the-fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status.
LTpowerPlay software can be downloaded here. The USB to PMBus Controller Dongle DC1613A for use with LTpowerPlay is available here.
DC2849A
Analog Devices Inc.The LTC6561 is a low-noise four-channel, transimpedance amplifier (TIA)with 220MHz bandwidth. The LTC6561 multi-channel transimpedance amplifier?s low noise, high transimpedance, and low power dissipation are ideal for LIDAR receivers using Avalanche Photodiodes (APDs). The amplifier features 74k? transimpedance gain and 30?A linear input current range. Using an APD input circuit with a total capacitance of 2pF, the input current noise density is 4.5pA/?Hz at 200MHz. With lower capacitance, noise and bandwidth improve further. Only a 5V single supply is needed and the device consumes only 200mW. Utilizing the internal 4-to-1 MUX along with the LTC6561?s output MUX; multiple 4-channel LTC6561 devices can be combined to directly interface with 8, 12, 16 and 32-channel APD arrays. The LTC6561?s fast overload recovery and fast channel switchover make it well suited for LIDAR receivers with multiple APDs. Its single-ended output can swing 2VP-P on a 100? load. While its low impedance op amp-style output can drive back-terminated 50? cables.The LTC6561 is packaged in a compact 4mm ? 4mm 24-pin leadless QFN package with an exposed pad for thermal management and low inductance.Applications LIDAR Receiver Industrial Imaging
LTC7818 Demo Board | Triple Output Synchronous Step-Up/Dual Step-Down Supply
Analog Devices Inc.Demonstration circuit DC2855A is a triple output synchronous step-up/dual step-down supply featuring the LTC 7818. The demonstration circuit is designed for two buck outputs 5V/10A, 3.3V/10A supplied by a boosted 10V output. Benefiting from this feature, the buck outputs are able to maintain regulation over a wide input voltage range of 4.5V to 36V which is suitable for automotive or other battery fed applications. Also, the demonstration circuit uses a drop-in layout whereas the main buck circuit components fit in an area of ¾” by 1½”, while the main boost circuit area is ¾” by 1¾”. The package style for the LTC7818 is a 40-pin exposed pad QFN.
The main features of the board include rail tracking (Buck channels only), an internal 5V linear regulator for bias, separated RUN pins for each output, a PGOOD signal (CH1 only), an overvoltage indicator for CH3 and a Mode selector that allow the converter to run in CCM, Pulseskipping or Burst Mode operation. Spread Spectrum Mode is availiable for EMI improvement. Synchronization to an external clock is also possible. The LTC7818 datasheet gives a complete description of these parts, operation and application information. The datasheet must be read in conjunction with this quick start guide for demo circuit 2855A.
DC2861A
Analog Devices Inc.The LTM4658 is a complete 10A step-down switching mode ?Module? regulator in a tiny 4mm ? 4mm ? 4.32mm LGA package. Included in the package are the switching controller, power MOSFETs, inductor and all support components. Operating over an input voltage range of 2.25V to 5.5V, the LTM4658 supports an output voltage range of 0.5V to VIN set by external resistors. Its high efficiency design delivers 10A continuous output current. Only ceramic input and output capacitors are needed.The LTM4658 employs a Silent Switcher 2 architecture with internal hot loop bypass capacitors to achieve both low EMI and high efficiency at high switching frequencies.The LTM4658 also supports frequency synchronization, multiphase operation, selectable pulse-skipping mode operation, output voltage tracking for supply rail sequencing. Its high switching frequency and a current mode architecture enables a very fast transient response to line and load changes without sacrificing stability.Fault protection features include overvoltage, overcurrent and overtemperature protection. The LTM4658 is Pb-Free and RoHS compliant.APPLICATIONS Telecom, Datacom, Networking System Optical Module Industrial Equipment Point-of-Load Regulation
DC2870A-KIT
Analog Devices Inc.The LTC5596 is a high accuracy RMS power detector that provides a very wide RF input bandwidth, from 100MHz up to 40GHz. This makes the device suitable for a wide range of RF and microwave applications, such as point-to-point microwave links, instrumentation and power control applications.The DC output voltage of the detector is an accurate representation of the average signal power applied to the RF input. The response is linear-in-dB with 29mV/dB logarithmic slope over a 35dB dynamic range with typically better than ?1dB accuracy. The detector is particularly suited for measurement of waveforms with crest factor (CF) as high as 12dB, and waveforms that exhibit a significant variation of the crest factor during the measurement.To achieve higher accuracy and lower output ripple, the averaging bandwidth can be externally adjusted by a capacitor connected between the FLTR and OUT pins.The enable interface switches the device between active measurement mode and a low power shutdown mode.Applications Point-to-Point Microwave Links Instrumentation and Measurement Equipment Military Radios LTE, WiFi, WiMax Wireless Networks RMS Power Measurement Receive and Transmit Gain Control RF PA Transmit Power Control
DC2873A-C
Analog Devices Inc.The LTC2688 is a 16-channel,16-bit, ?15 V digital-to-analog converter (DAC) with an integrated precision reference. The LTC2688 is guaranteed monotonic and has built in rail-to-rail output buffers that can source or sink up to 20 mA. This SoftSpan? DAC offers five output ranges up to ?15 V. The range of each channel is independently programmable.The internal 4.096 V precision reference sets the accuracy of the output voltage. An external reference can be used for additional range options. Three toggle pins support Input Register A and Input Register B toggle or sinusoidal dither at multiple frequencies. An analog multiplexer simplifies measurement of pin voltages, load currents, and junction temperature.Programmable offset and gain registers improve the accuracy of the DAC outputs.The serial peripheral interface (SPI) and MICROWIRE?-compatible, 3-wire serial interface operates on logic levels as low as 1.71 V and clock rates up to 50 MHz.APPLICATIONSOptical networkingInstrumentationData acquisitionAutomatic test equipmentProcess control and industrial automation
LTM4670 | Low VIN, Quad μModule Regulator with Configurable 10A Output Array Step-Down Regulator
Analog Devices Inc.Demonstration circuit 2891A features the LTM4670EY, a high efficiency, quad 10A step-down power μModule® regulator. The input voltage range is from 2.25V to 5.5V. The output voltage range is 0.5V to VIN. Derating is necessary for certain VIN, VOUT, frequency and thermal conditions. The DC2891A offers the SSTT pin allowing the user to program output tracking, soft-start period and die temperature monitoring.
The MODE/SYNC pin either synchronizes the switching frequency to an external clock, is a clock output, or sets the PWM mode. The PWM modes of operation are forced continues mode for low noise or pulse-skipping mode for high efficiency at light load. The LTM4670 defaults to forced continues mode in regulation and during synchronization. The LTM4670 operates in pulse-skipping mode when both the FREQ and MODE/SYNC pins are connected to VIN.
DC2891A has optional jumper resistors to parallel multiple LTM4670 channels. For paralleled channels, one channel can be set as master, and the rest can be set as slaves. The phase shift of a slave channel relative to the master channel can be programmed with a resistor divider on the FREQ pin.
For DC2891A, four channels of LTM4670 are working separately and all set as master. A multiphase oscillator LTC6902 is used to set 90-degree phase shift between adjacent phases and reduce the amount of ripple current in both the input and output capacitors.
The LTM4670 data sheet must be read in conjunction with the demo manual prior to working on or modifying demo circuit DC2891A.
DC2900A
Analog Devices Inc.The LTC6561 is a low-noise four-channel, transimpedance amplifier (TIA)with 220MHz bandwidth. The LTC6561 multi-channel transimpedance amplifier?s low noise, high transimpedance, and low power dissipation are ideal for LIDAR receivers using Avalanche Photodiodes (APDs). The amplifier features 74k? transimpedance gain and 30?A linear input current range. Using an APD input circuit with a total capacitance of 2pF, the input current noise density is 4.5pA/?Hz at 200MHz. With lower capacitance, noise and bandwidth improve further. Only a 5V single supply is needed and the device consumes only 200mW. Utilizing the internal 4-to-1 MUX along with the LTC6561?s output MUX; multiple 4-channel LTC6561 devices can be combined to directly interface with 8, 12, 16 and 32-channel APD arrays. The LTC6561?s fast overload recovery and fast channel switchover make it well suited for LIDAR receivers with multiple APDs. Its single-ended output can swing 2VP-P on a 100? load. While its low impedance op amp-style output can drive back-terminated 50? cables.The LTC6561 is packaged in a compact 4mm ? 4mm 24-pin leadless QFN package with an exposed pad for thermal management and low inductance.Applications LIDAR Receiver Industrial Imaging
LTM4691 Demo Board | Low VIN, High Efficiency, Dual 2A Step-down μModule DC/DC Converter
Analog Devices Inc.Demonstration circuit 2910A is low VIN, high efficiency, and dual 2A output µModule DC/DC converter. The board operates by default at a fixed 2MHz and can be synchronized from 1MHz to 3MHz via the MODE/SYNC pin. With its high switching frequency and current mode architecture, a fast transient response to line and load changes is possible without sacrificing stability. The DC2910A can be used in forced continuous mode or pulse skip mode for low noise, or in burst mode operation for high efficiency at light loads. The demo board features the LTM4691, which is available in a low profile 3mm x 4mm x 1.2mm LGA package. Please see the LTM4691 datasheet for more detailed information.
It is recommended to read the data sheet for the LTM4691 prior to making any changes to the DC2910A.
LT4293, LT4321 IEEE 802.3bt and LTPoE++ Interoperable Powered Device
Analog Devices Inc.Demonstration circuit 2911A is an IEEE 802.3bt compliant and LTPoE++ interoperable Power over Ethernet (PoE) Powered Device (PD). It features the LT4293 PD interface controller and the LT4321 PoE ideal diode bridge controller.
The LT4293 provides LTPoE++, IEEE 802.3af (PoE, Type 1), IEEE 802.3at (PoE+, Type 2), and IEEE 802.3bt (PoE++, Type 3 and 4) compliant interfacing. It utilizes an external, low RDS(ON) (30mΩ typical) N-channel MOSFET for the Hot Swap function to improve efficiency.
Power good (PWRGD) output indicates the PD controller is ready to provide power to the downstream load. This signal can be used to enable an isolated power supply. The T2P output indicates the available power from the Power Sourcing Equipment (PSE). This signal communicates allocated power from either LTPoE++ or IEEE 802.3bt-compliant PSEs to the downstream PD circuitry.
The LT4321 controls eight low RDS(ON) (57mΩ typical) N-channel MOSFETs to further improve end-to-end power delivery efficiency and ease thermal design. This solution replaces the eight diodes typically found in a passive PoE rectifier bridge.
The DC2911A accepts up to 90W of delivered power from a PSE via the RJ45 connector (J1) or a local 48V DC power supply using the auxiliary supply input. When both supplies are connected, the auxiliary supply input has priority over the PoE input.
LTC5597 | 100MHz to 70GHz RMS Power Detector
Analog Devices Inc.Demonstration circuit 2932A hosts a high accuracy RMS power detector featuring the LTC5597 IC. This ultrawide bandwidth device has a RMS response that measures RF and microwave signals from 100MHz to 70GHz. The input signal converts to a DC voltage that is logarithmically proportional to the input signal level. Moreover, the LTC5597 offers unprecedented sensitivity, capable of detecting signals of –37dBm typical. Additionally, it has outstanding input dynamic range up to 35dB, achieving 1dB accuracy, depending on frequency. The detector output voltage slope is normally 29mV/dB. The PCB layout employs the recommended microstrip transmission line structure, as well as the recommended endpoint transitions. Input impedance to LTC5597 is internally matched to 50Ω. It is suitable for RMS measurements of high crest factor waveforms up to 12dB peak/average ratio. No external coupling capacitor is necessary if DC voltage at RFIN pin is kept below 1V. Contact applications support for more information.
LT8357 Demo Board | Low IQ High Power Boost Converter
Analog Devices Inc.Demonstration circuit 2937A features the LT8357 as a 360kHz low IQ, high power boost converter with a 48V output from 10V to 40V input. This demonstration circuit
features spread spectrum frequency modulation (SSFM) and split gate driver pins for the high power, high voltage switch. The converter can output 2A and higher (see Figure 3 in the demo manual). When placed in shutdown, the converter has very low quiescent current, ideal in automotive and other battery-powered applications. Low quiescent current can be achieved with both pulse-skipping and Burst Mode® operation as jumper selections on this demonstration circuit.
The LT8357 boost controller IC operates over an input range of 3V to 60V, suitable for automotive, telecom and industrial applications. It also exhibits a low quiescent
current of 8μA, making it ideal for battery-operated systems. It drives a low side N-channel power MOSFET with a 5V split gate drive. The controller provides adjustable
and synchronizable operation from 100kHz to 2MHz. At light load, either pulse-skipping or low-ripple Burst Mode operation can be selected to improve the efficiency.
It also packs many popular features such as soft-start, input undervoltage lockout, adjustable frequency and clock synchronization. PGOOD indicates when the output
voltage is in regulation.
The LT8357 comes in a thermally enhanced 12-lead plastic MSE package. The LT8357 data sheet gives a complete description of the part, pins, features, operation and
application information. The data sheet must be read in conjunction with the demo manual for DC2937A.
DC2945A
Analog Devices Inc.The LTC4246 contains eight switches, each with an independent circuit breaker function. It is particularly well suited for extremely space constrained designs. Each switch can operate completely autonomously or be arbitrarily grouped with other switches that will respond together to the fault of any single device within its group. Optionally, channel grouping may be extended to multiple LTC4246 devices by selecting the FIN# (fault input) pin as part of a channel group. A required bias supply between 2.5V to 5V allows the switches to independently operate from 13.2V down to 0V. The LTC4246 provides an SPI serial interface to enable, disable and configure the timing and current thresholds of each channel as well as provide status to each channel?s fault state.A common open-drain FAULT status output indicates if any switch has opened due to a circuit breaker event.APPLICATIONSATE Wafer Probe ElectronicsScope Probe ProtectionIndustrial ControlRelay Replacement
DC2951A
Analog Devices Inc.The LTC7806 is a high performance 2-phase single output synchronous boost converter controller that drives two N-channel power MOSFET stages out-of-phase. Its constant-frequency current mode architecture allows a phase-lockable switching frequency of up to 3MHz. High frequency 2-phase operation reduces input and output capacitor requirements and allows the use of smaller inductors compared to the single-phase equivalent. Synchronous rectification increases efficiency, reduces power losses, and eases thermal requirements, simplifying high power boost applications. The synchronous PassThru capability also minimizes losses in automotive start-stop applications.The LTC7806 operates from a wide 4.5V to 40V input supply range. When biased from the boost converter output, the LTC7806 can operate from an input supply as low as 1V after start-up. The very low no-load quiescent current extends operating run time in battery powered systems. OPTI-LOOP? compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC7806 features a precision 1.2V reference, a power good output indicator, and an inductor current monitor.APPLICATIONS Automotive and Transportation Audio and RF Power Amplifiers Industrial and Medical Communications
DC2966A
Analog Devices Inc.The LTC3376 is a highly flexible multioutput power supply IC. The device includes four synchronous buck converters, configured to share eight 1.5A power stages, powered from independent 3V to 20V inputs. The DC/DCs are assigned to one of fifteen power configurations via pin strappable CFG0 to CFG3 pins. The LTC3376 includes the integration of ceramic capacitors into the package for the BST pins thereby saving PCB space. The common buck switching frequency may be programmed with an external resistor, synchronized to an external oscillator, or set to a default internal 2MHz clock. The operating mode for all DC/DCs may be programmed via the SYNC/MODE pin for Burst Mode or forced continuous mode operation. The PGOOD1 to PGOOD4 outputs indicate when each enabled DC/DC is within a specified percentage of its final output. Current monitors allow for external monitoring of each buck?s load. The EXTVCC pin allows for the internal circuitry to run from a 3V to 5.5V rail for improved efficiency. Precision RUN pin thresholds facilitate power-up sequencing. The LTC3376 is available in a 64 lead 7mm ? 7mm BGA (0.8mm ball pitch).Applications? Telecom/Industrial? 12V Distributed Power Systems
DC2969A-A
Analog Devices Inc.The LTC4372/LTC4373 are positive high voltage ideal diode controllers that drive an external N-channel MOSFET to replace a Schottky diode. They control the forward voltage drop across the MOSFET to ensure current delivery or current transfer from one path to the other even at light loads.A 5?A operating current achieves high efficiency for intermittent load applications or always-on backup power supplies. If a power source fails or is shorted, a fast turn-off minimizes reverse current transients. The LTC4372/LTC4373 control back-to-back N-channel MOSFETs for inrush current control and load switching.The LTC4372?s SHDN pin keeps the MOSFET off and reduces the quiescent current to 3.5?A. The LTC4373 has a UV pin for undervoltage monitoring while the UVOUT?pin provides hysteresis adjustment and status information. During undervoltage, the back-to-back MOSFETs are cut off and quiescent current reduces to 0.5?A.APPLICATIONS Automotive Battery Protection Redundant Power Supplies Portable Instrumentation Solar Powered Systems Energy Harvesting Applications Supply Holdup
LTC3337 | Primary Battery SOH Monitor with Precision Coulomb Counter
Analog Devices Inc.Demonstration circuit 2973A shows the LTC3337 Primary Battery State of Health (SOH) monitor with precision coulomb counter operating with a configurable peak current limit. The LTC3337 supports input voltages from 1.8V to 5.5V and a peak current up to 100mA with a quiescent current of 100nA. Coulomb count, battery voltage, and Battery Series Resistance (BSR) are measurable and can be used to quantify the charge state and health of a battery.
The DC2973A demonstrates a simple layout for the highest-power configuration of the LTC3337. The circuit can be reduced for lower IPEAK levels. The demo board can be connected directly to a PC using a micro USB cable in order to run a GUI and configure simple a Battery State of Charge (SOC) monitor. Source code for the GUI is available and can be used as a starting point for LTC3337 firmware development.
LT3380 Demo Board | Multi-Output Power Management Solution with 4 Buck Switching and 3 LDO Linear Regulators with I2C
Analog Devices Inc.DC2985A is a multi-output power management solution demonstration circuit, featuring the LT3380. It contains two 2.5A, two 1.5A synchronous step-down DC/DC regulators and three 300mA LDO regulators.
All regulators can be enabled with external enable pins. After the first regulator is enabled, the remaining enable pins use a precision threshold to allow hardwire-programmed Power-Up Sequence.
A micro-USB communication interface is integrated on board to allow software GUI to write or read the registers in LT3380 via its I2C serial port. This GUI can control regulator enables, power-down sequencing, output voltage levels, dynamic voltage scaling, operation modes, status reporting and other special functions.
Refer to LT3380 data sheet for more details on the electrical specifications and the setting of its command registers.
