Ultra High Resolution Delta Sigma ADC with PGA for Seismic and Energy Exploration - ADS1282

ADS1282 (ACTIVE)

Ultra High Resolution Delta Sigma ADC with PGA for Seismic and Energy Exploration

 

Description

The ADS1282 is an extremely high-performance, single-chip analog-to-digital converter (ADC) with an integrated, low-noise programmable gain amplifier (PGA) and two-channel input multiplexer (mux). The ADS1282 is 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 (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. The SYNC input also accepts a clock input for continuous alignment of conversions from an external source.

Together, the amplifier, modulator, and filter dissipate 25 mW. The ADS1282 is available in a compact TSSOP-28 package and is fully specified from –40°C to +85°C, with a maximum operating range to +125°C.

Features

  • High Resolution:
    130-dB SNR (250 SPS)
  • High Accuracy:
    THD: –122 dB
    INL: 0.5 ppm
  • Low-Noise PGA
  • Two-Channel Input Mux
  • Inherently-Stable Modulator with Fast Responding
    Overrange Detection
  • Flexible Digital Filter:
    Sinc + FIR + IIR (Selectable)
    Linear or Minimum Phase Response
    Programmable High-Pass Filter
    Selectable FIR Data Rates: 250 SPS
    to 4 kSPS
  • Filter Bypass Option
  • Low Power Consumption: 25 mW
    Shutdown: 10 µW
  • Offset and Gain Calibration Engine
  • SYNC Input
  • Analog Supply:
    Unipolar (+5 V) or Bipolar (±2.5 V)
  • Digital Supply: 1.8 V to 3.3 V

View more

Other qualified versions of ADS1282

Version Part Number Definition
High-Temperature ADS1282-HT High-Temperature product for harsh environments
Space ADS1282-SP Radiation tolerant, ceramic packaging and qualified for use in Space-based application

Featured tools and software