ADS1282HPW

ADS1282HPW is a high-temperature ultra-high-resolution delta-sigma analogue-to-digital converter (ADC) with an integrated, low-noise programmable gain amplifier (PGA) and two-channel input multiplexer (MUX). It suitable for the demanding needs of energy exploration and seismic monitoring environments. The converter uses a fourth-order, inherently stable, delta-sigma (ΔΣ) modulator that provides outstanding noise and linearity performance. The modulator is used either in conjunction with the on-chip digital filter, or can be 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 (5nV/√Hz) and high input impedance, allowing easy interfacing to geophones and hydrophones over a wide range of gains. Application includes energy exploration, seismic monitoring, high-accuracy instrumentation, down-hole drilling and high temperature environment.

• 124dB SNR (1000 SPS) high resolution, -102dB high accuracy, 0.5ppm INL
• Low-noise PGA, two-channel input MUX
• Inherently-stable modulator with fast responding over-range detection
• Sinc + FIR + IIR (selectable), linear or minimum phase response flexible digital filter
• Programmable high-pass filter, 250SPS to 4KSPS selectable FIR data rates, SYNC input
• 25mW (210°C) low-power consumption, unipolar (5V) or bipolar (±2.5V) analogue supply
• One fabrication site, extended product life cycle
• Extended product-change notification, product traceability
• Digital supply range from 1.75 to 3.3V
• 28pin TSSOP package, operating temperature range from -55 to 175°C