ADS1282-HT
www.ti.com
SBAS446F –DECEMBER 2009–REVISED AUGUST 2011
HIGH-RESOLUTION ANALOG-TO-DIGITAL CONVERTER
Check for Samples: ADS1282-HT
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FEATURES
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Analog Supply:
Unipolar (5 V) or Bipolar (±2.5 V)
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High Resolution:
122-dB SNR
Digital Supply: 1.75 V to 3.3 V
(250 SPS, High-Resolution Mode, 210°C)
119-dB SNR
(250 SPS, Low-Power Mode, 210°C)
SUPPORTS EXTREME TEMPERATURE
APPLICATIONS
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High Accuracy:
THD: –102 dB (210°C)
INL: 0.5 ppm
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Controlled Baseline
One Assembly/Test Site
One Fabrication Site
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Low-Noise PGA
Available in Extreme (–55°C to 210°C)
Temperature Range
Two-Channel Input MUX
Inherently-Stable Modulator with Fast
Responding Over-Range Detection
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Extended Product Life Cycle
Extended Product-Change Notification
Product Traceability
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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
Texas Instruments high temperature products
utilize highly optimized silicon (die) solutions
with design and process enhancements to
maximize performance over extended
temperatures.
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Filter Bypass Option
Low Power Consumption:
High-Resolution Mode: 30 mW (210°C)
Low-Power Mode: 22 mW (210°C)
APPLICATIONS
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Energy Exploration
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Offset and Gain Calibration Engine
SYNC Input
Seismic Monitoring
High-Accuracy Instrumentation
Down-Hole Drilling
High Temperature Environments
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 (5nV/√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.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2009–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.