Demonstration circuit DC970A-A and DC970A-B feature the LTC3541 and LTC3541-1 respectfully, and provide a high efficiency, synchronous buck plus VLDO linear regulator. For the LTC3541, the buck regulator powers up before the linear regular, and for the LTC3541-1, the linear regulator powers up first. The DC970A has an input voltage range of 3.0V to 5.5V. The jumper selectable (2.5V or 1.8V) buck regulator output is capable of delivering up to 500mA of output current; the jumper selectable (0.8V, 1.2V, 1.5V or 1.8V) linear regulator output is capable of delivering up to 300mA of current.

The LT3482 is a fixed frequency current mode step-up DC/DC converter with voltage doubler designed to bias avalanche photodiodes (APDs) in optical receivers. It can provide up to 90V output. The LT3482 features high side APD bias current monitoring with better than 10% relative accuracy over the entire temperature range. The integrated power switch, Schottky diodes and APD bias current monitor allow a small converter footprint and low solution cost. Constant switching frequency results in predictable output noise that is easy to filter. The inductor-based topology ensures an input free from switching noise. An integrated high side current monitor produces a current proportional to APD bias current with better than 10% relative accuracy over four decades of dynamic range in the input range of 250nA to 2.5mA. This APD bias current can be used as a reference to provide a digitally programmed output voltage via the CTRL pin. The LT3482 is available in the tiny footprint (3mm ? 3mm) 16-lead QFN package.Applications APD Bias PIN Diode Bias Optical Receivers and Modules Fiber Optic Network Equipment

DC987B-C: Demo Board for the LTC6400-20 1.8GHz Low Noise, Low Distortion Differential ADC Driver for 300MHz IF.

DC987B-D: Demo Board for the LTC6400-26 1.9GHz Low Noise, Low Distortion Differential ADC Driver for DC-300MHz.

DC987B-F: Demo Board for the LTC6401-14 2GHz Low Noise, Low Distortion Differential ADC Driver for DC-140MHz.

DC988A-A: Demo Board for LT3585 Photoflash Charger with Adjustable Input Current and IGBT Driver

DC991A: Demo Board for the LT5560 0.01MHz to 4GHz Low Power Active Mixer.

Demonstration circuit 992 is a Step-Down Converter, using the LTC3549 monolithic synchronous buck regulator. The DC992A has an input voltage range of 1.6V to 5.5V, and is  capable of delivering up to 250 mA of output current at a minimum input voltage of 1.8V. The output voltage of the DC992A can be set as low as 0.611V, the reference voltage of the LTC3549. At low load currents, the DC992A can operate in either noise sensitive applications, due to the capability of the LTC3549 to operate in pulse-skipping mode, or in high  efficiency applications, because the LTC3549 can also operate in Burst-Mode.

DC997B-B: Demo Board for the LTC2241-12 12-Bit, 210Msps ADC.

The HMC1034LP6GE is a low-noise, wide-band clock generator IC with a fractional-N Phase Locked Loop (PLL) that features an integrated Voltage Controlled Oscillator (VCO). The device provides differential clock outputs between 125MHz and 3GHz range. The HMC1034LP6GE features low noise Phase Detector (PD) and Delta-Sigma modulator, capable of operating at up to 100MHz, permit wider loop-bandwidths with excellent spectral performance.The HMC1034LP6GE features industry leading phase noise and jitter performance, across the operating range, that enable it to improve link level jitter performance, Bit-Error-Rates (BER) and eye diagram metrics. The superior noise floor (<-165dBc/Hz) makes the HMC1034LP6GE an ideal source for a variety of applications?such as clock references for high speed data converters, physical layer devices (PHY), serializer/deserializer (SERDES) circuits, FPGAs and processors. The HMC1034LP6GE can also be used as an LO for 10G/40G/100G optical modules and transponders, as well as primary reference clock for 10G/40G/100G line cards, and for jitter attenuation and frequency translation.The differential output of the HMC1034LP6GE includes a 2-bit output amplitude control which may be set via the SPI serial programming interface, and an output Mute function. The Delta-Sigma Modulator of the HMC1034LP6GE features Hittite?s Exact Frequency Mode, which enables users to generate output frequencies with close to 0 Hz frequency error.APPLICATIONS 10G/40G/100G Optical Modules, Transponders,?Line Cards OTN and SONET/SDH Applications 1G/10G Ethernet Line Cards High Frequency Processor Clocks Low Jitter SAW Oscillator Replacement? Fiber Channel Interface Clocks Cellular/4G Infrastructure DDS Replacement 10G Optical Modules,?Transponders, Line Cards