Datasheet > DS1217

DS1217

更新时间： 2024-02-27 17:45:17

品牌	Logo	应用领域
BB		转换器
页数	文件大小	规格书
28页	454K
描述
8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER

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DS1217 数据手册

ADS1217

SBAS260B – MAY 2002 – REVISED OCTOBER 2004

8-Channel, 24-Bit

ANALOG-TO-DIGITAL CONVERTER

FEATURES

DESCRIPTION

● 24 BITS NO MISSING CODES

● INL: 0.0012% of FSR (max)

● FULL-SCALE INPUT: ±2V_REF

● PGA FROM 1 TO 128

The ADS1217 is a precision, wide dynamic range, delta-

sigma, Analog-to-Digital (A/D) converter with 24-bit resolu-

tion operating from 2.7V to 5.25V supplies. The delta-sigma,

A/D converter provides up to 24 bits of no missing code

performance and effective resolution of 22 bits.

● 22 BITS EFFECTIVE RESOLUTION

The eight 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.

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

● SINGLE CYCLE SETTLING MODE

● PROGRAMMABLE DATA OUTPUT RATES

UP TO 1kHz

● ON-CHIP 1.25V/2.5V REFERENCE

● ON-CHIP CALIBRATION

The PGA (Programmable Gain Amplifier) 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 2nd-order,

delta-sigma modulator and programmable sinc filter. The

reference input is differential and can be used for ratiometric

measurements. The onboard current DACs operate indepen-

dently with the maximum current set by an external resistor.

● SPI COMPATIBLE

● POWER SUPPLY: 2.7V to 5.25V

● < 1mW POWER CONSUMPTION, V_DD= 3V

APPLICATIONS

The serial interface is SPI compatible. Eight bits of digital I/O

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

ADS1217 is designed for high-resolution measurement appli-

cations in smart transmitters, industrial process control, weigh

scales, chromatography, and portable instrumentation.

● INDUSTRIAL PROCESS CONTROL

● LIQUID/GAS CHROMATOGRAPHY

● BLOOD ANALYSIS

● SMART TRANSMITTERS

● PORTABLE INSTRUMENTATION

● WEIGH SCALES

AGND AV_DD

R_DAC

V_REFOUT

V_RCAP

V_REF+V_REF–

X_IN

X_OUT

8-Bit

IDAC2

IDAC

Clock Generator

● PRESSURE TRANSDUCERS

Voltage

Reference

8-Bit

IDAC

IDAC1

Offset

DAC

PDWN

DYSNC

RESET

_IN0

A_IN

Registers

Program-

Controller

2nd-Order

Modulator

mable

Digital

Filter

MUX

BUF

PGA

RAM

POL

SCLK

D_IN

A_INCOM

Serial Interface

D_OUT

Digital I/O

Interface

DRDY

BUFEN

DV_DDDGND

D0 ... D7

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

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与DS1217相关器件

型号	品牌	获取价格	描述	数据表
DS1217A	DALLAS	获取价格	Nonvolatile Read/Write Cartridge
DS1217A/128K-25	MAXIM	获取价格	Memory Circuit, 16KX8, CMOS
DS1217A/128K-25	DALLAS	获取价格	Nonvolatile Read/Write Cartridge
DS1217A/16K-25	DALLAS	获取价格	Nonvolatile Read/Write Cartridge
DS1217A/16K-28	ETC	获取价格	NVRAM (Battery Based)
DS1217A/192K-25	DALLAS	获取价格	Nonvolatile Read/Write Cartridge
DS1217A/192K-25	MAXIM	获取价格	Memory Circuit, 24KX8, CMOS,
DS1217A/256K-25	DALLAS	获取价格	Nonvolatile Read/Write Cartridge
DS1217A/64K-25	DALLAS	获取价格	Nonvolatile Read/Write Cartridge
DS1217A/64K-25	MAXIM	获取价格	Memory Circuit, 8KX8, CMOS

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