Date: 09/12/2008

Level-translating ADC driver simplifies signal conditioning

Analog Devices introduced the AD8275 level-translating ADC (analog-to-digital converter) driver, which simplifies signal conditioning for high-voltage industrial and instrumentation designs.
By translating ±10-V signals to 0-to-4-V input levels, the 15-MHz AD8275 is especially suited for driving higher-speed 16-bit successive approximation (SAR) converters, including ADI's AD7685 SAR ADC. The new amplifier can be configured for differential outputs to drive differential input converters, such as the AD7688 PulSAR® ADC, and can be used to drive lower sample-rate 18-bit converters, including ADI's AD7678 PulSAR ADC.

The AD8275 G difference amplifier includes internal, matched, precision laser-trimmed resistors that achieve 0.002 percent gain error, and 1 ppm/°C (maximum) gain drift. Delivering low distortion and a fast 450-ns settling time to 0.001 percent, the amplifier is ideal for system engineers designing applications where quick, accurate data capture is required.
The AD8275 features a wide input voltage range of +40 V to -35 V and rail-to-rail outputs. The AD8275 can be used as an analog front end, or it can follow buffers to level translate high voltages to a voltage range accepted by the ADC.

Temperature Range: -40°C to +85°C


Price: $1.60 Each Per 1000
Packaging: 8-lead, 3-mm × 5-mm MSOP

For more details: www.analog.com