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Analog Devices (ADI) has released the AD8275 level-translating ADC (analogue-to-digital converter) driver, which simplifies signal conditioning for high-voltage designs.

System designers can now use a single component to attenuate, level-shift, and drive low-voltage ADCs in high-voltage applications, reducing part count and board space by simplifying the signal conditioning complexities that often occur in data acquisition, data logging and other high-performance industrial and instrumentation equipment.

By translating +/-10V signals to 0-4V input levels, the 15MHz AD8275 is suitable for driving higher-speed 16-bit successive approximation (SAR) converters, including ADI’s AD7685 SAR ADC.

The 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 equals 0.2 difference amplifier includes internal, matched, precision laser-trimmed resistors that achieve 0.002 per cent gain error, and 1ppm/C (maximum) gain drift.

Delivering low distortion and a fast 450ns settling time to 0.001 per cent, the amplifier is suitable for system engineers designing applications where quick, accurate data capture is required.

In addition to eliminating high-voltage power supplies, discrete resistor dividers, driver amplifiers, and other signal conditioning circuitry previously required to drive SAR ADCs, the AD8275 saves space by virtue of its small-footprint, 8-lead, 3mm x 5mm MSOP (mini small-outline package).

The AD8275 features a wide-input voltage range of +40V to -35V and rail-to-rail outputs, making an easy-to-use building block.

Single-supply operation reduces the power consumption of the amplifier, and helps to protect the ADC from overdrive conditions.

The AD8275 can be used as an analogue front end, or it can follow buffers to level translate high voltages to a voltage range accepted by the ADC.

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