ADS1242

更新时间： 2024-09-29 22:47:39

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
25页	408K
描述
24-Bit ANALOG-TO-DIGITAL CONVERTER

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ADS1242 数据手册

ADS1242

ADS1243

SBAS235B – DECEMBER 2001 – OCTOBER 2004

24-Bit

ANALOG-TO-DIGITAL CONVERTER

DESCRIPTION

FEATURES

● 24 BITS NO MISSING CODES

The ADS1242 and ADS1243 are precision, wide dynamic

range, delta-sigma, analog-to-digital (A/D) converters with

24-bit resolution operating from 2.7V to 5.25V supplies.

These delta-sigma, A/D converters provide up to 24 bits of no

missing code performance and effective resolution of 21 bits.

● SIMULTANEOUS 50Hz AND 60Hz REJECTION

(–90dB MINIMUM)

● 0.0015% INL

● 21 BITS EFFECTIVE RESOLUTION

(PGA = 1), 19 BITS (PGA = 128)

The input channels are multiplexed. Internal buffering can be

selected to provide a very high input impedance for direct

connection to transducers or low-level voltage signals. Burn-

out current sources are provided that allow for the detection

of an open or shorted sensor. An 8-bit digital-to-analog

converter (DAC) provides an offset correction with a range of

50% of the FSR (Full-Scale Range).

● PGA GAINS FROM 1 TO 128

● SINGLE-CYCLE SETTLING

● PROGRAMMABLE DATA OUTPUT RATES

● EXTERNAL DIFFERENTIAL REFERENCE

OF 0.1V TO 5V

● ON-CHIP CALIBRATION

The Programmable Gain Amplifier (PGA) provides selectable

gains of 1 to 128 with an effective resolution of 19 bits at a gain

of 128. The A/D conversion is accomplished with a second-order

delta-sigma modulator and programmable FIR filter that pro-

vides a simultaneous 50Hz and 60Hz notch. The reference input

is differential and can be used for ratiometric conversion.

● SPI™ COMPATIBLE

● 2.7V TO 5.25V SUPPLY RANGE

● 600µW POWER CONSUMPTION

● UP TO EIGHT INPUT CHANNELS

● UP TO EIGHT DATA I/O

The serial interface is SPI compatible. Up to eight bits of data

I/O are also provided that can be used for input or output. The

ADS1242 and ADS1243 are designed for high-resolution

measurement applications in smart transmitters, industrial

process control, weight scales, chromatography, and portable

instrumentation.

APPLICATIONS

● INDUSTRIAL PROCESS CONTROL

● LIQUID/GAS CHROMATOGRAPHY

● BLOOD ANALYSIS

● SMART TRANSMITTERS

V_DD

V_REF+

V_REF–

X_IN

X_OUT

● PORTABLE INSTRUMENTATION

● WEIGHT SCALES

V_DD

Clock Generator

2µA

Offset

DAC

A_IN0/D0

A_IN1/D1

A_IN2/D2

A_IN3/D3

A_IN4/D4

A_IN5/D5

A_IN6/D6

A = 1:128

PGA

IN+

2nd-Order

Modulator

Digital

MUX

Controller

Registers

BUF

Filter

IN–

_IN7/D7

ADS1243

Only

SCLK

D_IN

Serial Interface

DRDY

2µA

D_OUT

GND

PDWN

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 Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

www.ti.com

12 3 4 5 6 7...25

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与ADS1242相关器件

型号	品牌	获取价格	描述	数据表
ADS1242_14	TI	获取价格	24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1242IPWR	TI	获取价格	24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1242IPWRG4	TI	获取价格	24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1242IPWT	TI	获取价格	24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1242IPWTG4	TI	获取价格	24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1243	TI	获取价格	24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1243-HT	TI	获取价格	24-BIT ANALOG-TO-DIGITAL CONVERTER
ADS1243IPWR	TI	获取价格	24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1243IPWRG4	TI	获取价格	24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1243IPWT	TI	获取价格	24-Bit ANALOG-TO-DIGITAL CONVERTER

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