Datasheet > ADS1218Y250

ADS1218Y250

更新时间： 2024-09-30 22:09:19

品牌	Logo	应用领域
BB		转换器存储
页数	文件大小	规格书
30页	458K
描述
8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER with FLASH Memory

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ADS1218Y250 数据手册

ADS1218

SBAS187 – SEPTEMBER 2001

8-Channel, 24-Bit

ANALOG-TO-DIGITAL CONVERTER

with FLASH Memory

DESCRIPTION

FEATURES

● 24 BITS NO MISSING CODES

● 0.0015% INL

The ADS1218 is a precision, wide dynamic range, delta-sigma, Analog-to-

Digital(A/D)converterwith24-bitresolutionandFLASHmemoryoperating

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

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

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. Burn out current sources are provided that allow

for the detection of an open or shorted sensor. An 8-bit Digital-to-Analog (D/

A) converter provides an offset correction with a range of 50% of the FSR

(Full-Scale Range).

● 4K BYTES OF FLASH MEMORY

PROGRAMMABLE FROM 2.7V TO 5.25V

● PGA FROM 1 TO 128

● SINGLE CYCLE SETTLING MODE

● PROGRAMMABLE DATA OUTPUT RATES

UP TO 1kHz

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 second-order delta-sigma modulator and

programmable sinc filter. The reference input is differential and can be used

for ratiometric conversion. The on-board current DACs (Digital-to-Analog

Converters) operate independently with the maximum current set by an

external resistor.

●

PRECISION ON-CHIP 1.25V/2.5V REFERENCE:

ACCURACY: 0.2%

DRIFT: 5ppm/°C

● EXTERNAL DIFFERENTIAL REFERENCE

OF 0.1V TO 2.5V

● ON-CHIP CALIBRATION

● PIN COMPATIBLE WITH ADS1216

● SPI™ COMPATIBLE

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

thatcanbeusedforinputoroutput. TheADS1218isdesignedforhigh-resolution

measurement applications in smart transmitters, industrial process control, weight

scales, chromatography, and portable instrumentation.

● 2.7V TO 5.25V

● < 1mW POWER CONSUMPTION

AGND AV_DD

R_DAC

V_REFOUT

V_RCAP

V_REF+

V_REF–

X_IN

X_OUT

8-Bit

IDAC

IDAC2

IDAC1

APPLICATIONS

Clock Generator

1.25V or

2.5V

Reference

8-Bit

IDAC

● INDUSTRIAL PROCESS CONTROL

● LIQUID/GAS CHROMATOGRAPHY

● BLOOD ANALYSIS

AV_DD

2µA

Offset

DAC

● SMART TRANSMITTERS

● PORTABLE INSTRUMENTATION

● WEIGHT SCALES

A_IN

A = 1:128

PGA

Registers

RAM

IN+

A_IN2

Program-

mable

Digital

Filter

2nd-Order

Modulator

A_IN

MUX

Controller

BUF

IN–

● PRESSURE TRANSDUCERS

4K Bytes

FLASH

WREN

POL

SPI is a registered trademark of Motorola.

A_INCOM

SCLK

D_IN

Serial Interface

RESET DRDY

2µA

Digital I/O

Interface

D_OUT

AGND

DV_DD

DGND BUFEN

D0 ... D7

PDWN DSYNC

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.

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...30

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与ADS1218Y250相关器件

型号	品牌	获取价格	描述	数据表
ADS1218Y250G4	TI	获取价格	8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER with FLASH Memory
ADS1218Y2K	BB	获取价格	8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER with FLASH Memory
ADS1219	TI	获取价格	具有 I2C 接口和外部基准输入电压的 24 位 1kSPS 4 通道、通用 Δ-Σ AD
ADS1219IPW	TI	获取价格	具有 I2C 接口和外部基准输入电压的 24 位 1kSPS 4 通道、通用 Δ-Σ AD
ADS1219IPWR	TI	获取价格	具有 I2C 接口和外部基准输入电压的 24 位 1kSPS 4 通道、通用 Δ-Σ AD
ADS1219IPWT	TI	获取价格	具有 I2C 接口和外部基准输入电压的 24 位 1kSPS 4 通道、通用 Δ-Σ AD
ADS1219IRTER	TI	获取价格	具有 I2C 接口和外部基准输入电压的 24 位 1kSPS 4 通道、通用 Δ-Σ AD
ADS1219IRTET	TI	获取价格	具有 I2C 接口和外部基准输入电压的 24 位 1kSPS 4 通道、通用 Δ-Σ AD
ADS1220	TI	获取价格	Low-Power, Low-Noise, 24-Bit, Analog-to-Digital Converter for Small-Signal Sensors
ADS1220_14	TI	获取价格	Low-Power, Low-Noise, 24-Bit, Analog-to-Digital Converter for Small-Signal Sensors

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