Demonstration circuit 2513B is a high efficiency, high power density hybrid converter. It can deliver 12V/20A with an input voltage from 36V to 72V. This demo board features the LTC7821, which uses an architecture that merges soft-switching switched-capacitor topology with a traditional step-down converter to provide superior efficiency compared to the traditional switching architectures. It offers a high efficiency/high density and cost effective solution for nonisolated intermediate bus applications in power distribution, datacom and telecom as well as emerging 48V automotive systems. External MOSFETs switch at a 500kHz fixed frequency for this demo board and can be programmed from 200kHz to 1.5MHz. The LTC7821’s powerful 1Ω N-channel MOSFET gate drivers maximize efficiency and can drive multiple MOSFETs in parallel for higher power applications. Due to its current mode control architecture, multiple LTC7821s can be operated in a parallel, multiphase configuration with excellent current sharing and low output voltage ripple to enable much higher power applications. Other benefits include low EMI emissions due to a soft-switched front end and reduced MOSFET stress. The LTC7821 design eliminates the inrush current typically associated with switched capacitor circuits by prebalancing the capacitors on start-up. The LTC7821 also monitors system voltage, current and temperature for faults, and uses a sense resistor for overcurrent protection. It stops switching and pulls the FAULT pin low when a fault condition occurs. An onboard timer can be set for appropriate restart/retry times. Additional features include ±1% output voltage accuracy over temperature, a clock output for multiphase operation, a power good output signal, short-circuit protection, monotonic output voltage start-up, optional external reference, undervoltage lockout and internal charge balance circuitry. The LTC7821 data sheet must be used in conjunction with this demo board manual.

Together with an external loop filter and a voltage controlled crystal oscillator (VCXO), the HMC1031 forms a complete clock generator solution targeted at low frequency jitter attenuation and reference clock generation applications.The HMC1031 features a low power integer N divider, support-ing divide ratios of 1, 5, and 10, which is controlled via external hardware pins and requires no serial port.The integrated phase detector and charge pump are capable of operating at up to 140 MHz, and a maximum VCXO input of 500 MHz ensures frequency compliance with a wide variety of system clocks and VCXOs.Additional features include an integrated lock detect indicator available on a dedicated hardware pin, and a built in power-down mode.The HMC1031 is housed in an 8-lead MSOP package.APPLICATIONS Low jitter clock generation Low bandwidth (BW) jitter attenuation Low frequency phase-locked loops PLL Frequency translation Oven controlled crystal oscillator (OCXO) frequency multiplier Phase lock clean high frequency references to 10 MHz equipment

The ADA4850-1/ADA4850-2 are low price, high speed, voltagefeedbacks rail-to-rail output op amps with ultralow power-down.Despite their low price, the ADA4850-1/ADA4850-2 provideexcellent overall performance and versatility. The 175 MHz,?3 dB bandwidth and 220 V/?s slew rate make these amplifierswell-suited for many general-purpose, high speed applications.The ADA4850-1/ADA4850-2 are designed to operate at supplyvoltages as low as 2.7 V and up to 6 V at 2.4 mA of supplycurrent per amplifier. In power-down mode, the supply currentis less than 150 nA, ideal for battery-powered applications.The ADA4850-1/ADA4850-2 family provides users with a truesingle-supply capability, allowing input signals to extend200 mV below the negative rail and to within 2.2 V of thepositive rail. The output of the amplifier can swing within80 mV of either supply rail.With its combination of low price, excellent differential gain(0.12%), differential phase (0.09?), and 0.1 dB flatness out to14 MHz, these amplifiers are ideal for video applications. The ADA4850-1/ADA4850-2 are designed to work in theextended temperature range of ?40?C to +125?C. Applications Portable multimedia players Video cameras Digital still cameras Consumer video Clock buffers

The LTM4650-1A/LTM4650-1B is dual 25A or single 50A output step-down ?Module? (power module) regulator with ?0.8% (LTM4650-1A) and ?1.5% (LTM4650-1B) total DC output error with ?3% transient output error. Included in the package are the switching controller, power FETs, inductors, and all supporting components. External compensation allows for fast transient response to minimize output capacitance when powering FPGAs, ASICs, and processors. With synchronized multiphase parallel current sharing, six LTM4650-1 devices can deliver up to 300A. The LTM4650-1 is offered in a 16mm ? 16mm ? 5.01 BGA package, with SnPb (BGA) or RoHS compliant terminal finish. VIN Range VOUT Range Comp DC VOUT Accy LTM4650 4.5V to 15V 0.6V to 1.8V Internal 1.5% LTM4650-1B 4.5V to 15V 0.6V to 1.8V External 1.5% LTM4650-1A 4.5V to 15V 0.6V to 1.8V External 0.8% LTM4650A 4.5V to 16V 0.6V to 5.5V Internal 1% LTM4650A-1 4.5V to 16V 0.6V to 5.5V External 1% Applications FPGA, ASIC, ?Processor Core Voltage Regulation Information, Communication Systems

The AD5423 is a single-channel, voltage and current output digital-to-analog converter (DAC) that operates with a power supply range from ?33 V minimum on AVSS to +33 V maximum on AVDD1. The CHART pin enables a Highway Addressable Remote Transducer? (HART) signal to be coupled on the current output. The AD5423 uses a versatile, 4-wire, serial peripheral interface (SPI) that operates at clock rates of up to 50 MHz and is compatible with standard SPI, QSPI?, MICROWIRE?, digital signal processor (DSP), and microcontroller interface standards. The interface also features an optional SPI cyclic redundancy check (CRC) and a watchdog timer (WDT). The AD5423 offers improved diagnostic features from earlier versions of similar DACs, such as an integrated, 12-bit diagnostic analog-to-digital converter (ADC).Product Highlights 16-bit performance. Range of diagnostic features. Integrated 12-bit monitoring ADC. HART compliant.Applications Process control Actuator control Channel isolated analog outputs Programmable logic controller (PLC) and distributed control systems (DCS) applications HART network connectivity

The LT1339 is a high power synchronous current mode switching regulator controller. The IC drives dual N-channel MOSFETs to create a single IC solution for high power DC/DC converters in applications up to 60V.The LT1339 incorporates programmable average current limiting, allowing accurate limiting of DC load current independent of inductor ripple current. The IC also incorporates user-adjustable slope compensation for minimization of magnetics at duty cycles up to 90%.The LT1339 timing oscillator operating frequency is programmable and can be synchronized up to 150kHz. Minimum off-time operation provides main switch protection. The IC also incorporates a soft start feature that is gated by both shutdown and undervoltage lockout conditions.An output phase reversal pin allows flexibility in configuration of converter types, including inverting and negative topologies.Applications 48V Telecom Power Supplies Personal Computers and Peripherals Distributed Power Converters Industrial Control Systems Lead-Acid Battery Backup Systems Automotive and Heavy Equipment

LTC2175-14 14-Bit, 125Msps Low Power Quad ADCs.

The LTC6655 is a complete family of precision bandgap voltage references, offering exceptional noise and drift performance. This low noise and drift is ideally suited for the high resolution measurements required by instrumentation and test equipment. In addition, the LTC6655 is fully specified over the temperature range of ?40?C to 125?C, ensuring its suitability for demanding automotive and industrial applications. Advanced curvature compensation allows this bandgap reference to achieve a drift of less than 2ppm/?C with a predictable temperature characteristic and an output voltage accurate to ?0.025%, reducing or eliminating the need for calibration.The LTC6655LN Low Noise comes with a noise reduction pin that enables reduction of wideband noise with the addition of a single capacitor.The LTC6655 can be powered from as little as 500mV above the output voltage to as much as 13.2V. Superior load regulation with source and sink capability, coupled with exceptional line rejection, ensures consistent performance over a wide range of operating conditions. A shutdown mode is provided for low power applications.The LTC6655 references are offered in an 8-lead MSOP package and an 8-lead LS8 package. The LS8 is a 5mm ? 5mm surface mount hermetic package that provides outstanding stability.APPLICATIONS Instrumentation and Test Equipment High Resolution Data Acquisition Systems Weigh Scales Precision Battery Monitors Precision Regulators Medical Equipment

The LTC2636 is a family of octal 12-, 10-, and 8-bit voltage-output DACs with an integrated, high-accuracy, low-drift 10ppm/?C reference in 14-lead DFN and 16-lead MSOP packages. It has a rail-to-rail output buffer and is guaranteed monotonic. The LTC2636-L has a full-scale output of 2.5V, and operates from a single 2.7V to 5.5V supply. The LTC2636-H has a full-scale output of 4.096V, and operates from a 4.5V to 5.5V supply. Each DAC can also operate with an external reference, which sets the DAC full-scale output to the external reference voltage.These DACs communicate via an SPI/MICROWIRE-compatible 3-wire serial interface which operates at clock rates up to 50MHz. Hardware clear (CLR) and asynchronous DAC update (LDAC) pins are available in the MSOP package. The LTC2636 incorporates a power-on reset circuit. Options are available for reset to zero-scale or reset to mid-scale in internal reference mode, or reset to mid-scale in external reference mode after power-up.Applications Mobile Communications Process Control and Industrial Automation Automatic Test Equipment Portable Equipment Automotive Optical Networking

DC1488A-C: Demo Board for the LTC2634-12 Quad 12-Rail-to-Rail DACs with 10ppm/°C Reference.