ADS1281

更新时间： 2024-09-13 04:31:39

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
46页	768K
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High-Resolution Analog-to-Digital Converter

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ADS1281 数据手册

ADS1281

SBAS378A–SEPTEMBER 2007–REVISED NOVEMBER 2007

High-Resolution Analog-to-Digital Converter

FEATURES

DESCRIPTION

•

High Resolution:

The ADS1281 is an extremely high-performance,

single-chip analog-to-digital converter (ADC)

designed for the demanding needs of energy

exploration and seismic monitoring environments.

The single-chip design promotes board area savings

for improvements in high-density applications.

–

130dB SNR (250SPS)

127dB SNR (500SPS)

•

High Accuracy:

–

THD: –122dB (typ), –115dB (max)

INL: 0.6ppm

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.

•

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:

The digital filter consists of sinc and finite impulse

response (FIR) low-pass stages followed by an

infinite impulse response (IIR) high-pass filter (HPF)

stage. Selectable decimation provides data rates from

250 to 4000 samples per second (SPS). The FIR

low-pass stage provides both linear and minimum

phase response. The HPF features an adjustable

corner frequency. On-chip gain and offset scaling

registers support system calibration.

–

250SPS to 4kSPS

•

Filter Bypass Option

Low Power Consumption:

–

Operating: 12mW

Shutdown: 10µW

The synchronization input (SYNC) can be used to

synchronize the conversions of multiple ADS1281s.

The SYNC input also accepts a clock input for

continuous alignment of conversions from an external

source.

•

Calibration Engine for Offset and

Gain Correction

•

Synchronization Input

Analog Supply:

–

Unipolar (+5V) or Bipolar (±2.5V)

Together, the modulator and filter dissipate only

12mW. The ADS1281 is available in a compact

TSSOP-24 package and is fully specified from –40°C

to +85°C, with a maximum operating range to

+125°C.

•

Digital Supply: 1.8V to 3.3V

APPLICATIONS

•

Energy Exploration

Seismic Monitoring

High-Accuracy Instrumentation

AVDD VREFN VREFP

DVDD

CLK

ADS1281

SCLK

DOUT

AINP

AINN

4th-Order

Programmable

Digital Filter

Serial

Calibration

Interface

DIN

Modulator

DRDY

Over-Range

SYNC

RESET

PWDN

Control

Modulator Output

DGND

AVSS

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.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...46

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ADS1281 替代型号

型号	品牌	替代类型	描述	数据表
ADS1282	TI	功能相似	High-Resolution Analog-to-Digital Converter

与ADS1281相关器件

型号	品牌	获取价格	描述	数据表
ADS1281_14	TI	获取价格	High-Resolution Analog-to-Digital Converter
ADS1281IPW	TI	获取价格	High-Resolution Analog-to-Digital Converter
ADS1281IPWG4	TI	获取价格	High-Resolution Analog-to-Digital Converter
ADS1281IPWR	TI	获取价格	High-Resolution Analog-to-Digital Converter
ADS1281IPWRG4	TI	获取价格	High-Resolution Analog-to-Digital Converter
ADS1282	TI	获取价格	High-Resolution Analog-to-Digital Converter
ADS1282_08	TI	获取价格	High-Resolution Analog-to-Digital Converter
ADS1282_1	TI	获取价格	High-Resolution Analog-to-Digital Converter
ADS1282HIPW	TI	获取价格	用于地震监测和能源勘探且具有 PGA 的超高分辨率 4kSPS 2 通道 Δ-Σ ADC
ADS1282HIPWR	TI	获取价格	Ultra-high-resolution 4-kSPS 2-channel delta-sigma ADC with PGA for seismic and energy exp

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