Demonstration circuit 1311 is a Telecom isolated DC/DC converter featuring the LTC3805/-5 constant frequency current mode flyback controller. The DC1311 converts 18V to 72V input voltage to an isolated 3A of output current at 3.3V. The 300kHz constant frequency operation is maintained down to very light load to reduce low frequency noise generated over a wide range of load current. The converter provides high output voltage accuracy (typically ±2%) over wide load range with no minimum load requirement. The DC1311 also provides non-isolated design by removing opto coupler and LTC4430 circuit. The demonstration circuit can be easily modified to generate different output voltages up to 15V. As output voltage is increased, the maximum output current must be reduced to limit the output power to no more than 10W.

DC1316A: Demo Board for LT1913 25V, 3.5A, 2.4MHz Step-Down Switching Regulator.

The LT1952/LT1952-1 are current mode PWM controllers optimized to control the forward converter topology, using one primary MOSFET. The LT1952/LT1952-1 provide synchronous rectifier control, resulting in extremely high efficiency. A programmable Volt-Second clamp provides a safeguard for transformer reset that prevents saturation. This allows a single MOSFET on the primary side to reliably run at greater than 50% duty cycle for high MOSFET, transformer and rectifier utilization. The devices include soft-start for controlled exit from shutdown and undervoltage lockout. A precision 107mV current limit threshold, independent of duty cycle, combines with softstart to provide hiccup short circuit protection. The LT1952 is optimized for micropower bootstrap startup from high input voltages. The LT1952-1 allows startup from lower input voltages. Programmable slope compensation and leading edge blanking allow optimization of loop bandwidth with a wide range of inductors and MOSFETs. Each device can be programmed over a 100kHz to 500kHz frequency range and the part can be synchronized to an external clock. The error amplifier is a true op amp, allowing a wide range of compensation networks. The LT1952/LT1952-1 are available in a small 16-pin SSOP package.Applications Telecommunications Power Supplies Industrial and Distributed Power Isolated and Non-Isolated DC/DC Converters

DC1322A: Demo Board for LT3751 High Voltage Capacitor Charger Controller with Regulation

DC1324A: Demo Board for LTC3672B-2 - Monolithic Fixed-Output 400mA Buck Regulator with Dual 150mA LDOs in 2mm × 2mm DFN

The LTC2631 is a family of 12-, 10-, and 8-bit voltage-output DACs with an integrated, high accuracy, low-drift reference in an 8-lead TSOT-23 package. It has a rail-to-rail output buffer that is guaranteed monotonic.The LTC2631-L has a full-scale output of 2.5V, and operates from a single 2.7V to 5.5V supply. The LTC2631-H has a full-scale output of 4.096V, and operates from a 4.5V to 5.5V supply. A 10ppm/?C reference output is available at the REF pin.Each DAC can also operate in External Reference mode, in which a voltage supplied to the REF pin sets the fullscale output.The LTC2631 DACs use a 2-wire, I2C-compatible serial interface. The LTC2631 operates in both the standard mode (clock rate of 100kHz) and the fast mode (clock rate of 400kHz).The LTC2631 incorporates a power-on reset circuit. Options are available for reset to zero-scale or reset to mid-scale after power-up.Applications Mobile Communications Process Control and Industrial Automation Automatic Test Equipment Portable Equipment Automotive Optical Networking

The AD9789 is a flexible QAM encoder/interpolator/upconverter combined with a high performance, 2400 MSPS, 14-bit RF digital-to-analog converter (DAC). The flexible digital interface can accept up to four channels of complex data. The QAM encoder supports constellation sizes of 16, 32, 64, 128, and 256 with SRRC filter coefficients for all standards.The on-chip rate converter supports a wide range of baud rates with a fixed DAC clock. The digital upconverter can place the channels from 0 to 0.5 ? fDAC. This permits four contiguous channels to be synthesized and placed anywhere from dc to fDAC.The AD9789 includes a serial peripheral interface (SPI) for device configuration and status register readback. The flexible digital interface can be configured for data bus widths of 4, 8, 16, and 32 bits. It can accept real or complex data.The AD9789 operates from 1.5 V, 1.8 V, and 3.3 V supplies for a total power consumption of 1.6 W. It is supplied in a 164-ball chip scale package ball grid array for lower thermal impedance and reduced package parasitics. No special power sequencing is required. The clock receiver powers up muted to prevent start-up noise.Product Highlights Highly integrated and configurable QAM mappers, interpolators, and upconverters for direct synthesis of one to four DOCSIS- or DVB-C-compatible channels in a block. Low noise and intermodulation distortion (IMD) performance enable high quality synthesis of signals up to 1 GHz. Flexible data interface supports LVDS for improved SFDR or CMOS input data for less demanding applications. Interface is configurable from 4-bit nibbles to 32-bit words and can run at up to 150 MHz CMOS or 150 MHz LVDS double data rate (DDR). Manufactured on a CMOS process, the AD9789 uses a proprietary switching technique that enhances dynamic performance.Applications Broadband communications systems CMTS/DVB Cellular infrastructure Point-to-point wireless

The AD9910 is a direct digital synthesizer (DDS) featuringan integrated 14-bit DAC and supporting sample rates up to1 GSPS. The AD9910 employs an advanced, proprietary DDStechnology that provides a significant reduction in power consumptionwithout sacrificing performance. The DDS/DACcombination forms a digitally programmable, high frequency,analog output synthesizer capable of generating a frequencyagile sinusoidal waveform at frequencies up to 400 MHz.The user has access to the three signal control parameters thatcontrol the DDS: frequency, phase, and amplitude. The DDSprovides fast frequency hopping and frequency tuning resolutionwith its 32-bit accumulator. With a 1 GSPS sample rate, thetuning resolution is ~0.23 Hz. The DDS also enables fast phaseand amplitude switching capability.The AD9910 is controlled by programming its internal controlregisters via a serial I/O port. The AD9910 includes an integratedstatic RAM to support various combinations of frequency, phase,and/or amplitude modulation. The AD9910 also supports a userdefined, digitally controlled, digital ramp mode of operation. Inthis mode, the frequency, phase, or amplitude can be variedlinearly over time. For more advanced modulation functions, ahigh speed parallel data input port is included to enable directfrequency, phase, amplitude, or polar modulation.The AD9910 is specified to operate over the extended industrialtemperature range.Applications Agile local oscillator (LO) frequency synthesis Programmable clock generators FM chirp source for radar and scanning systems Test and measurement equipment Acousto-optic device drivers Polar modulators Fast frequency hopping

The AD9912 is a direct digital synthesizer (DDS) that features an integrated 14-bit digital-to-analog converter (DAC). The AD9912 features a 48-bit frequency tuning word (FTW) that can synthesize frequencies in step sizes no larger than 4 ?Hz. Absolute frequency accuracy can be achieved by adjusting the DAC system clock.The AD9912 also features an integrated system clock phase-locked loop (PLL) that allows for system clock inputs as low as 25 MHz.The AD9912 operates over an industrial temperature range, spanning ?40?C to +85?C.APPLICATIONS Agile LO frequency synthesis Low jitter, fine tune clock generation Test and measurement equipment Wireless base stations and controllers Secure communications Fast frequency hopping

The ADA4807-1 (single), ADA4807-2 (dual), and ADA4807-4 (quad) are low noise, rail-to-rail input and output, voltage feedback amplifiers. These amplifiers combine low power, low noise, high speed, and dc precision to provide an attractive solution for a wide range of applications from high resolution data acquisition instrumentation to high performance battery-powered and high component density systems where power consumption is of key importance.With only 1.0 mA of supply current per amplifier, the ADA4807-1/ADA4807-2/ADA4807-4 feature the lowest input voltage noise?among high speed, rail-to-rail input/output amplifiers in the industry and offer a wide bandwidth, high slew rate, fast settling time, and excellent distortion performance. Additionally, these amplifiers offer very low input offset voltage and drift performance, making them ideal for driving multiplexed and high throughput?precision 16-/18-bit successive approximation registers (SARs) and 24-bit ?-? ADCs.These amplifiers are fully specified at +3 V, +5 V, and ?5 V supplies and can operate over the industrial ?40?C to +125?C?temperature range.The ADA4807-1 is available in 6-lead SOT-23 and space-saving 6-lead SC70 packages. The ADA4807-2 is available in an 8-lead?MSOP and a compact, 3 mm ? 3 mm, 10-lead LFCSP. The ADA4807-4 is available in a 14-lead TSSOP package.Applications High resolution analog-to-digital converter (ADC) drivers Portable and battery-powered instruments and systems? High component density data acquisition systems Audio signal conditioning Active filters