High-Temperature Ultra-High-Resolution Delta Sigma ADC With PGA for Seismic and Energy Exploration - ADS1282-HT

ADS1282-HT (ACTIVE)

High-Temperature Ultra-High-Resolution Delta Sigma ADC With PGA for Seismic and Energy Exploration

 

Special note

The ADS1282EVM-PDK (Evaluation Module) can be used to evaluate the functionality of the ADS1282-HT.

Description

The ADS1282-HT device 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-HT device 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.

Two operating modes allow optimization of noise and power. Together, the amplifier, modulator, and filter dissipate 30 mW. The ADS1282-SP is fully specified from –55°C to 210°C or from –55°C to 175°C for the PW package.

Features

  • High Resolution: 124-dB SNR (1000 SPS)
  • High Accuracy: THD: –102 dB
    INL: 0.5 ppm
  • Low-Noise PGA
  • Two-Channel Input MUX
  • Inherently-Stable Modulator With Fast Responding
    Over-Range 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 (210°C)
  • Offset and Gain Calibration Engine
  • SYNC Input
  • Analog Supply: Unipolar (5 V) or Bipolar (±2.5 V)
  • Digital Supply: 1.75 to 3.3 V
  • Supports Extreme Temperature Applications(1)
    • Controlled Baseline
    • One Assembly/Test Site
    • One Fabrication Site
    • Available in Extreme (–55°C to 210°C)
      Temperature Range
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability

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Other qualified versions of ADS1282-HT

Version Part Number Definition
Catalog ADS1282 TI's standard catalog product
Space ADS1282-SP Radiation tolerant, ceramic packaging and qualified for use in Space-based application

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WEBENCH® Designer ADS1282-HT