ADS1282HPW

ADS1282HPW is an extremely high-performance, single-chip analog-to-digital converter (ADC) from Texas Instruments with an integrated, low-noise programmable gain amplifier (PGA) and a two-channel input multiplexer (mux). The device is specifically designed for the demanding needs of energy exploration and seismic monitoring environments, and is available in a high-temperature 28-pin TSSOP package rated for operation from –55°C to +175°C[reference:0].

The converter uses a fourth-order, inherently stable, delta-sigma (ΔΣ) modulator that provides outstanding noise and linearity performance. The modulator can be used either in conjunction with the on-chip digital filter, or bypassed for use with post-processing filters. The flexible input MUX provides an additional external input for measurement, as well as internal self-test connections.

The PGA features outstanding low noise (5 nV/√Hz) and high input impedance, allowing easy interfacing to geophones and hydrophones over a wide range of gains. The digital filter provides selectable data rates from 250 to 4000 samples per second (SPS). The high-pass filter (HPF) features an adjustable corner frequency. On-chip gain and offset scaling registers support system calibration. The synchronization input (SYNC) can be used to synchronize the conversions of multiple ADS1282s, and also accepts a clock input for continuous alignment of conversions from an external source.

Together, the amplifier, modulator, and filter dissipate only 25 mW, with a shutdown power of 10 µW. The analog supply can be unipolar (+5 V) or bipolar (±2.5 V), while the digital supply ranges from 1.8 V to 3.3 V. The device is RoHS compliant, REACH unaffected, and in active production.