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ADS1282-HT_16

更新时间： 2024-11-01 02:58:23
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德州仪器 - TI /
页数 文件大小 规格书
60页 1447K
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High-Temperature High-Resolution Delta Sigma ADC

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ADS1282-HT_16 数据手册

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ADS1282-HT  
www.ti.com  
SBAS446F –DECEMBER 2009–REVISED AUGUST 2011  
HIGH-RESOLUTION ANALOG-TO-DIGITAL CONVERTER  
Check for Samples: ADS1282-HT  
1
FEATURES  
•
•
Analog Supply:  
Unipolar (5 V) or Bipolar (±2.5 V)  
•
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  
•
High Accuracy:  
THD: –102 dB (210°C)  
INL: 0.5 ppm  
•
•
•
•
Controlled Baseline  
One Assembly/Test Site  
One Fabrication Site  
•
•
•
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  
•
•
•
•
Extended Product Life Cycle  
Extended Product-Change Notification  
Product Traceability  
•
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.  
•
•
Filter Bypass Option  
Low Power Consumption:  
High-Resolution Mode: 30 mW (210°C)  
Low-Power Mode: 22 mW (210°C)  
APPLICATIONS  
•
•
•
•
•
Energy Exploration  
•
•
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.  
1
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.  
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