Datasheet > ADS1256IDB

ADS1256IDB

更新时间： 2024-11-05 22:17:31

品牌	Logo	应用领域
BB		转换器
页数	文件大小	规格书
39页	422K
描述
Very Low Noise, 24-Bit Analog-to-Digital Converter

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中文翻译

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数据手册

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ADS1256IDB 数据手册

ꢐ ꢕꢙ ꢚꢋ ꢛꢛ

ꢐ ꢕꢙ ꢚꢋ ꢛꢜ

SBAS288D − JUNE 2003 − REVISED AUGUST 2004

ꢀꢁ ꢂ ꢃ ꢄꢅ ꢆ ꢇꢅ ꢈꢉ ꢁꢊ ꢋꢌ ꢍ ꢎꢈ ꢏ

ꢐ ꢑ ꢒꢓ ꢅꢔꢍ ꢏ ꢅꢍ ꢕ ꢈꢔ ꢈꢏ ꢒꢓꢖ ꢗ ꢅꢑ ꢘꢁꢂ ꢏ ꢁꢂ

FEATURES

DESCRIPTION

The ADS1255 and ADS1256 are extremely low-noise,

24-bit analog-to-digital (A/D) converters. They provide

complete high-resolution measurement solutions for the

most demanding applications.

24 Bits, No Missing Codes

− All Data Rates and PGA Settings

Up to 23 Bits Noise-Free Resolution

0.0010% Nonlinearity (max)

The converter is comprised of a 4th-order, delta-sigma

(∆Σ) modulator followed by a programmable digital filter. A

flexible input multiplexer handles differential or

single-ended signals and includes circuitry to verify the

integrity of the external sensor connected to the inputs.

The selectable input buffer greatly increases the input

impedance and the low-noise programmable gain

amplifier (PGA) provides gains from 1 to 64 in binary steps.

The programmable filter allows the user to optimize

between a resolution of up to 23 bits noise-free and a data

rate of up to 30k samples per second (SPS). The

converters offer fast channel cycling for measuring

multiplexed inputs and can also perform one-shot

conversions that settle in just a single cycle.

Data Output Rates to 30kSPS

Fast Channel Cycling

− 18.6 Bits Noise-Free (21.3 Effective Bits)

at 1.45kHz

One-Shot Conversions with Single-Cycle

Settling

Flexible Input Multiplexer with Sensor Detect

− Four Differential Inputs (ADS1256 only)

− Eight Single-Ended Inputs (ADS1256 only)

Chopper-Stabilized Input Buffer

Low-Noise PGA: 27nV Input-Referred Noise

Self and System Calibration for All PGA

Settings

Communication is handled over an SPI-compatible serial

interface that can operate with a 2-wire connection.

Onboard calibration supports both self and system

correction of offset and gain errors for all the PGA settings.

Bidirectional digital I/Os and a programmable clock output

driver are provided for general use. The ADS1255 is

packaged in an SSOP-20, and the ADS1256 in an

SSOP-28.

5V Tolerant SPI-Compatible Serial Interface

Analog Supply: 5V

Digital Supply: 1.8V to 3.6V

Power Dissipation

− As Low as 38mW in Normal Mode

− 0.4mW in Standby Mode

AVDD

VREFP VREFN

DVDD

APPLICATIONS

AIN0

AIN1

XTAL1/CLKIN

XTAL2

Clock

Generator

Weigh Scales

Scientific Instrumentation

Industrial Process Control

Medical Equipment

1:64

PGA

AIN2

AIN3

Mux

and

Sensor

Detect

RESET

4th−Order

Modulator

Programmable

Digital Filter

Buffer

Control

SYNC/PDWN

AIN4

AIN5

AIN6

AIN7

DRDY

SCLK

DIN

Test and Measurement

General

Purpose

Digital I/O

Serial

Interface

AINCOM

DOUT

AGND

D3 D2

D1 D0/CLKOUT

DGND

ADS1256

Only

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.

ꢝꢞ ꢟ ꢕꢠ ꢗ ꢡꢢ ꢟꢇ ꢕ ꢐꢡꢐ ꢈꢑ ꢣꢅ ꢂ ꢤꢒ ꢏꢈꢅꢑ ꢈꢉ ꢥꢦ ꢂ ꢂ ꢁꢑꢏ ꢒꢉ ꢅꢣ ꢧꢦꢨ ꢓꢈꢥ ꢒꢏꢈ ꢅꢑ ꢩꢒ ꢏꢁꢪ ꢝꢂ ꢅꢩꢦ ꢥꢏꢉ

ꢥ ꢅꢑ ꢣꢅꢂ ꢤ ꢏꢅ ꢉ ꢧꢁ ꢥ ꢈ ꢣꢈ ꢥ ꢒ ꢏꢈ ꢅꢑꢉ ꢧ ꢁꢂ ꢏꢫꢁ ꢏꢁ ꢂ ꢤꢉ ꢅꢣ ꢡꢁꢬ ꢒꢉ ꢢꢑꢉ ꢏꢂ ꢦꢤ ꢁꢑꢏ ꢉ ꢉꢏ ꢒꢑꢩ ꢒꢂ ꢩ ꢆ ꢒꢂ ꢂ ꢒ ꢑꢏꢃꢪ

ꢝꢂ ꢅ ꢩꢦꢥ ꢏ ꢈꢅ ꢑ ꢧꢂ ꢅ ꢥ ꢁ ꢉ ꢉ ꢈꢑ ꢔ ꢩꢅ ꢁ ꢉ ꢑꢅꢏ ꢑꢁ ꢥꢁ ꢉꢉ ꢒꢂ ꢈꢓ ꢃ ꢈꢑꢥ ꢓꢦꢩ ꢁ ꢏꢁ ꢉꢏꢈ ꢑꢔ ꢅꢣ ꢒꢓ ꢓ ꢧꢒ ꢂ ꢒꢤ ꢁꢏꢁ ꢂ ꢉꢪ

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与ADS1256IDB相关器件

型号	品牌	获取价格	描述	数据表
ADS1256IDBR	BB	获取价格	Very Low Noise, 24-Bit Analog-to-Digital Converter
ADS1256IDBR	TI	获取价格	Very Low Noise, 24-Bit Analog-to-Digital Converter
ADS1256IDBRG4	TI	获取价格	适用于工厂自动化和过程控制且具有 PGA 的 24 位、30kSPS、8 通道 Δ-Σ A
ADS1256IDBT	BB	获取价格	Very Low Noise, 24-Bit Analog-to-Digital Converter
ADS1256IDBT	TI	获取价格	Very Low Noise, 24-Bit Analog-to-Digital Converter
ADS1256IDBTG4	TI	获取价格	适用于工厂自动化和过程控制且具有 PGA 的 24 位、30kSPS、8 通道 Δ-Σ A
ADS1257	TI	获取价格	具有集成 PGA 的 24 位、30kSPS、4 通道、工业 ADC
ADS1257IRGWR	TI	获取价格	具有集成 PGA 的 24 位、30kSPS、4 通道、工业 ADC \| RGW \| 20
ADS1257IRGWT	TI	获取价格	具有集成 PGA 的 24 位、30kSPS、4 通道、工业 ADC \| RGW \| 20
ADS1258	TI	获取价格	16-Channel, 24-Bit Analog-to-Digital Converter

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