ADS1271

更新时间： 2024-11-22 11:06:51

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
38页	793K
描述
适用于宽带宽应用的 24 位、105kSPS 单通道 Δ-Σ ADC

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中文翻译

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数据手册
替代型号

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ADS1271 数据手册

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SBAS306F − NOVEMBER 2004 − REVISED OCTOBER 2007

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FEATURES

DESCRIPTION

105kSPS Data Rate

The ADS1271 is a 24-bit, delta-sigma analog-to-digital

converter (ADC) with a data rate up to 105kSPS. It offers

a unique combination of excellent DC accuracy and

AC Performance:

51kHz Bandwidth

outstanding

performance.

The

high-order,

109dB SNR (High-Resolution Mode)

−108dB THD

chopper-stabilized modulator achieves very low drift with

low in-band noise. The onboard decimation filter

suppresses modulator and signal out-of-band noise. The

ADS1271 provides a usable signal bandwidth up to 90%

of the Nyquist rate with less than 0.005dB of ripple.

DC Accuracy:

1.8µV/°C Offset Drift

2ppm/°C Gain Drift

Selectable Operating Modes:

High-Speed: 105kSPS Data Rate

High-Resolution: 109dB SNR

Low-Power: 35mW Dissipation

Traditionally, industrial delta-sigma ADCs offering good

drift performance use digital filters with large passband

droop. As a result, they have limited signal bandwidth and

are mostly suited for DC measurements. High-resolution

ADCs in audio applications offer larger usable bandwidths,

but the offset and drift specification are significantly

weaker than their industrial counterparts. The ADS1271

combines these converters, allowing high-precision

industrial measurement with excellent DC and AC

specifications ensured over an extended industrial

temperature range.

Power-Down Control

Digital Filter:

Linear Phase Response

Passband Ripple: 0.005dB

Stop Band Attenuation: 100dB

Internal Offset Calibration On Command

Selectable SPIt or Frame Sync Serial Interface

Three operating modes allow for optimization of speed,

resolution, and power. A selectable SPI or a frame-sync

serial interface provides for convenient interfacing to

microcontrollers or DSPs. The output from the modulator

is accessible for external digital filter applications. All

operations, including internal offset calibration, are

controlled directly by pins; there are no registers to

program.

Designed for Multichannel Systems:

Daisy-Chainable Serial Interface

Easy Synchronization

Simple Pin-Driven Control

Modulator Output Option

Specified from −40°C to +105°C

Analog Supply: 5V

Digital Supply: 1.8V to 3.3V

VREFP VREFN

AVDD

DVDD

SYNC/PDWN

MODE

Control

Logic

APPLICATIONS

Vibration/Modal Analysis

CLK

Acoustics

DRDY/FSYNC

SCLK

Dynamic Strain Gauges

Pressure Sensors

AINP

AINN

∆Σ

Modulator

Digital

Filter

Serial

DOUT

Interface

DIN

Test and Measurement

FORMAT

AGND

DGND

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.

SPI is a trademark of Motorola Inc. All other trademarks are the property of their respective owners.

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ADS1271 替代型号

型号	品牌	替代类型	描述	数据表
ADS127L01	TI	功能相似	24 位、512kSPS、单通道、超低功耗、宽带宽 Δ-Σ ADC
ADS1672	TI	功能相似	625kSPS, 24-Bit Analog-to-Digital Converter

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ADS1271IBPWG4	TI	获取价格	24-Bit, Wide Bandwidth Analog-to-Dogotal Converter
ADS1271IBPWR	TI	获取价格	24-Bit, Wide Bandwidth Analog-to-Dogotal Converter
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ADS1271IPW	TI	获取价格	24-Bit, Wide Bandwidth Analog-to-Dogotal Converter
ADS1271IPW	BB	获取价格	24 BIT WIDE BANDWIDTH ANALOG TO DIGITAL CONVERTER
ADS1271IPWG4	TI	获取价格	24-Bit, Wide Bandwidth Analog-to-Dogotal Converter
ADS1271IPWR	BB	获取价格	24 BIT WIDE BANDWIDTH ANALOG TO DIGITAL CONVERTER

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