LT8636 Demo Board | 42V, 5A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current
Analog Devices Inc.Demonstration circuit 2918A is a 42V, 5A synchronous step-down SILENT SWITCHER with spread spectrum frequency modulation featuring the LT8636. The demo board is designed for 5V output from a 5.8V to 42V input. The wide input range allows a variety of input sources, such as automotive batteries and industrial supplies. The LT8636 is a compact, low emission, high efficiency, and high frequency synchronous monolithic step-down switching regulator. The proprietary silent switcher architecture minimizes electromagnetic emissions with simplified filter and reduced layout sensitivity. Selectable spread spectrum mode further improves EMI performance, making it perfect solution to the noise sensitive applications. The regulator’s ultralow 2.5μA quiescent current with the output in full regulation enables applications requiring highest efficiency at very light load currents, such as automotive and battery powered portable instruments.
Peak current mode control with minimum on-time of as small as 30ns allows high step-down conversion even at high frequency. The LT8636 switching frequency can be programmed either via oscillator resistor or external clock over a 200kHz to 3MHz range. The default frequency of demo circuit 2918A is 2MHz.
The SYNC/MODE pin on the demo board 2918A is grounded (JP1 at BURST position) by default for low ripple Burst Mode® operation. To synchronize to an external clock, move the Jump JP1 to SYNC/FCM and apply the external clock to the SYNC terminal on the 2918A. In sync mode, the part runs in forced continuous mode. Without external clock applied, the SYNC/MODE pin is floating, and the part runs in forced continuous mode. This mode offers fast transient response and full frequency operation over a wide load range. Alternatively, move the Jump JP1 to the SPREAD-SPECTRUM, and the SYNC/MODE is tied to INTVCC, the part runs in forced continuous mode with spread spectrum function enabled.
To get accurate efficiency measurement, measure the input voltage at the VIN_SENSE and GND terminals, which are Kelvin connected to the input cap C2 through signal traces.
The LT8636 is assembled in a 4mmx3mm LQFN package with exposed pads for low thermal resistance. The rated maximum load current is 5A, while derating is necessary for certain input voltage and thermal conditions.
The demo board has an EMI filter installed. The red line in Radiated EMI Performance is CISPR25 Class 5 peak limit. The circuit passes the test with a wide margin. To achieve EMI/EMC performance, the input EMI filter is required and the input voltage should be applied at VEMI terminal, and the setup can be referred to the CISPR 25 standards.
The LT8636 datasheet gives a complete description of the part, operation and application information. The datasheet must be read in conjunction with this demo manual for demo circuit 2918A. The layout recommendations for low EMI operation and best thermal performance are available in the datasheet section Low EMI PCB Layout and Thermal Considerations and Peak Output Current. Contact ADI applications engineer for support.
DC2922A-B
Analog Devices Inc.The LTC7802 is a high performance dual step-down synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages. Constant frequencycurrent mode architecture allows a phase-lockable switching frequency of up to 3MHz. The LTC7802 operates from a wide 4.5V to 40V input supply range. Power loss and supply noise are minimized by operating the two controller output stages out-of-phase.The very low no-load quiescent current extends operating runtime in battery powered systems. OPTI-LOOP compensation allows the transient response to be optimizedover a wide range of output capacitance and ESR values. The LTC7802 features a precision 0.8V reference and power good output indicators. The MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous inductor current mode at light loads.The LTC7802 additionally features spread spectrum operation which significantly reduces the peak radiated and conducted noise on both the input and output supplies, making it easier to comply with electromagnetic interference (EMI) standards.APPLICATIONSAutomotive and TransportationIndustrialMilitary/Avionics
LTC3104EDE Demo Board | 2.5V to 15V input, 3.3V at 300mA (Buck) and 1.8V at 10mA (LDO)
Analog Devices Inc.Demonstration Circuit 1754A features the LTC3104, a high efficiency, monolithic synchronous step-down converter using a current mode architecture capable of supplying 300mA of output current. The IC operates with a fixed frequency oscillator at 1.2MHz. The LTC3104 also incorporates a programmable LDO which can be operated from VIN, VOUT or an independent supply. The LDO can also be independently turned off or on.
The LTC3104 operates with a 2.5V to 15V input voltage range. The demo board has been designed with the main output set to 3.3V and the LDO output (VLDO) to 1.8V.
LTC3860EUH Demo Board I VIN Range: 6V to 14V, 1.2V/50A and 1.5V/50A VOUT
Analog Devices Inc.Demonstration circuit DC1755A provides the user with two high current dual phase synchronous buck converters driven by the LTC3860. These buck converters provide outputs of 1.5V/50A and 1.2V/50A over an input voltage range of 6V to 14V and a switching frequency of 500kHz. The board can be easily modified for a 4-phase, single VO, 100A supply. The power stage for each phase consists of the tri-state PWM compatible 6mm × 6mm Fairchild DrMOS module and a 0.47μH 13.2mm × 12.8mm iron powder type inductor from Würth. A high density, two sided drop-in layout is used. The entire converter, excluding the bulk output and input capacitors, fits within a 2.25” × 1.38” area on the board.
LTC2269: 16-bit 20Msps Low Noise ADC, LVDS Outputs, 5-140MHz, Requires DC890, LVDS_XFMR and DC1075
Analog Devices Inc.DC1762A-H: Demo Board for the LTC2269 16-Bit, 20Msps Low Noise ADC.
LTC2195: 16-bit 125Msps ADC, Serial LVDS Outputs, 5-170MHz, Requires DC1371 and DC1075
Analog Devices Inc.DC1763A-A: Demo Board for the LTC2195 16-Bit, 125Msps Low Power Dual ADCs.
LTC2191: 16-bit 40Msps ADC, Serial LVDS Outputs, 5-170MHz, Requires DC1371 and DC1075
Analog Devices Inc.DC1763A-E: Demo Board for the LTC2191 16-Bit, 40Msps Low Power Dual ADCs.
DC1764A
Analog Devices Inc.The LTC3122 is a synchronous step-up DC/DC converter with true output disconnect and inrush current limiting. The 2.5A current limit along with the ability to program output voltages up to 15V makes the LTC3122 well suited for a variety of demanding applications. Once started, operation will continue with inputs down to 500mV, extending runtime in many applications.The LTC3122 features output disconnect in shutdown, dramatically reducing input power drain and enabling VOUT to completely discharge. Adjustable PWM switching from 100kHz to 3MHz optimizes applications for highest efficiency or smallest solution footprint. The oscillator can also be synchronized to an external clock for noise sensitive applications. Selectable Burst Mode operation reduces quiescent current to 25?A, ensuring high efficiency across the entire load range. An internal soft-start limits inrush current during start-up.Other features include a
LTC2997 | Internal/Remote Temperature Sensor
Analog Devices Inc.DC1767A: Demo Board for the LTC2997 Remote/Internal Temperature Sensor.
DC1783A-C
Analog Devices Inc.The LTC2377-16 is a low noise, low power, high speed 16-bit successive approximation register (SAR) ADC. Operating from a 2.5V supply, the LTC2377-16 has a ?VREF fully differential input range with VREF ranging from 2.5V to 5.1V. The LTC2377-16 consumes only 6.8mW and achieves ?0.5LSB INL maximum, no missing codes at 16 bits with 97dB SNR.The LTC2377-16 has a high speed SPI-compatible serial interface that supports 1.8V, 2.5V, 3.3V and 5V logic while also featuring a daisy-chain mode. The fast 500ksps throughput with no cycle latency makes the LTC2377-16 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2377-16 automatically powers down between conversions, leading to reduced power dissipation that scales with the sampling rate.The LTC2377-16 features a unique digital gain compression (DGC) function, which eliminates the driver amplifier?s negative supply while preserving the full resolution of the ADC. When enabled, the ADC performs a digital scaling function that maps zero-scale code from 0V to 0.1 ? VREF and full-scale code from VREF to 0.9 ? VREF. For a typical reference voltage of 5V, the full-scale input range is now 0.5V to 4.5V, which provides adequate headroom for powering the driving amplifier from a single 5.5V supply.Applications Medical Imaging High Speed Data Acquisition Portable or Compact Instrumentation Industrial Process Control Low Power Battery-Operated Instrumentation ATE
LTC2376-16 with LTC6655-5/LT6350 Demo Board | 16-Bit, 250ksps, SAR ADC with 97dB SNR. Requires DC718 or DC2026
Analog Devices Inc.The LTC2380/LTC2379/LTC2378/LTC2377/LTC2376 are low power, low noise ADCs with serial outputs that can operate from a single 2.5V supply. The demo manual refers to the LTC2379-18 but applies to all parts in the family, the only difference being the maximum sample rates and the number of bits. The LTC2379-18 supports a ±5V fully differential input range with a 101dB SNR, consumes only 18mW and achieves ±2LSB INL max with no missing codes at 18-bits. The DC1783A demonstrates the DC and AC performance of the LTC2379-18 in conjunction with the DC590 QuikEval™ and DC718 PScope™ data collection boards.
DC1784B
Analog Devices Inc.The LT3797 is a triple output DC/DC controller designed to drive three strings of LEDs. The fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. The LT3797 includes an integrated DC/DC converter to produce a regulated 7.5V supply for the N-channel MOSFET gate drivers of the three channels. This high efficiency converter enables the part to operate from a wide input voltage range from 2.5V to 40V. The LT3797 is designed so that each converter can use the most suitable configuration to drive its LED load, whether step-up, step-down or a combination. Two key features enable this flexibility: first the LT3797 can sense output current at the high side of the LED string; and second, the voltage feedback pin, FBH, is referred to the ISP current sensing input. The CTRL inputs provide output current analog dimming capability. The TG drivers level shift the PWM signals to drive the gates of external LED-disconnect P-channel MOSFETs, allowing high PWM dimming range, and providing LED overcurrent protection and short-circuit protected boost capability.Applications Automotive and Industrial Lighting RGB Lighting Billboards and Large Displays
LTC2871 RS232/RS485 Multiprotocol Transceiver with Integrated Termination
Analog Devices Inc.DC1786A: Demo Board for the LTC2871 RS232/RS485 Multiprotocol Transceivers with Integrated Termination.
DC1789A
Analog Devices Inc.The LTM2884 is a complete galvanically isolated USB 2.0 compatible ?Module? (micromodule) transceiver. An upstream supply powers both sides of the interface through an integrated, isolated DC/DC converter.The LTM2884 is ideal for isolation in host, hub, bus splitter or peripheral device applications. It is compatible with USB 2.0 full speed (12Mbps) and low speed (1.5Mbps) operation. Automatic speed selection configures integrated pull-up resistors on the upstream port to match those sensed on the downstream device.The isolator ?Module technology uses coupled inductors and an isolated power transformer to provide isolation between the upstream and downstream USB interface. This device is ideal for systems requiring isolated ground returns or large common mode voltage variations. Uninterrupted communication is guaranteed for common mode transients greater than 30kV/?s.Enhanced ESD protection allows this part to withstand up to ?15kV (human body model) on the USB transceiver interface pins to local supplies and ?15kV through the isolation barrier to supplies without latch-up or damage.Applications Isolated USB Interfaces Host, Hub, or Device Isolation Industrial/Medical Data Acquisition
LTC6360 Driving LTC2370-16 Demo Board | 16-bit, 2Msps SAR ADC (Requires DC590 or DC718)
Analog Devices Inc.DC1796A-A Demo Board for:
LTC2370-16 16-Bit, 2Msps, Pseudo- Differential Unipolar SAR ADC with 94dB SNR
LTC6360 Very Low Noise Single-Ended SAR ADC Driver with True Zero Output
LTC6360 Driving LTC2364-16 Demo Board | 16-Bit, 0.25Msps SAR ADC (Requires DC590 or DC718)
Analog Devices Inc.DC1796A-D Demo Board for:
LTC6360 Very Low Noise Single-Ended SAR ADC Driver with True Zero Output
LTC2364-16 16-Bit, 250ksps, Pseudo-Differential Unipolar SAR ADC with 94.7dB SNR
LTC3838EUHF Demo Board (RSENSE) | VIN = 4.5V to 14V, VOUT1 = 1.2V @ 20A, VOUT2 = 1.5V @ 20A
Analog Devices Inc.Demonstration circuit 1801A is a dual output 1.5V/20A and 1.2V/20A synchronous buck converter operating with a switching frequency of 300kHz over an input voltage range of 4.5V to 14V. The demo board comes in two versions. The A version uses inductor DCR current sensing for high efficiency. The B version uses 2mΩ sense resistor for accurate current sensing with a low DCR ferrite inductor. The fixed on-time valley current mode topology of the LTC3838 allows for a fast load step response.
LTC6362 with 500ksps 18-bit LTC2377-18 Demo Board | SAR ADC, LTC6655-5. Requires DC718 or DC2026
Analog Devices Inc.The LTC6362 is a low power, low noise differential op amp with rail-to-rail input and output swing that has been optimized to drive low power SAR ADCs. The amplifier may be configured to buffer a fully differential input signal or convert a single-ended input signal to a differential output signal.
LTC2943 Demo Board | 20VIN, 0.5A Battery Gas Gauge w/ Ext RSENSE (requires DC2026)
Analog Devices Inc.Demonstration circuit 1812A (Figure 1) features the LTC2943. The LTC2943 has an operating range of 3.6V to 20V making it perfectly suited for multicell battery applications. A precision analog coulomb counter integrates current measured through a sense resistor between the battery’s positive terminal and the load or charger. The default value assembled on the DC1812A-A is 100mΩ for a maximum current measurement of 500mA. The LTC2943 measures voltage, current and temperature with an internal 14-bit No Latency ΔΣ™ ADC. The measurements are stored in internal registers accessible via the onboard SMBus/I2C interface.
LTC2368-18 with LTC6655-5/LT6202 Demo Board | 18-Bit, 1Msps, Pseudo-Differential Unipolar SAR ADC with 97dB SNR. Requires DC718 or DC590
Analog Devices Inc.DC1813A-F Demo Board for:
LTC2368-18 18-Bit, 1Msps, Pseudo-Differential Unipolar SAR ADC with 97dB SNR
LTC6655 0.25ppm Noise, Low Drift Precision References
LT6202 Single 100MHz, Rail-to-Rail Input and Output, Ultralow 1.9nV√Hz Noise, Low Power Op Amps
