ADS8881

更新时间： 2024-11-09 12:52:51

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
44页	893K
描述
18-Bit, 1-MSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Analog-to-Digital Converter

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ADS8881 数据手册

ADS8881

www.ti.com

SBAS547A –MAY 2013–REVISED JULY 2013

18-Bit, 1-MSPS, Serial Interface, microPower, Miniature,

True-Differential Input, SAR Analog-to-Digital Converter

Check for Samples: ADS8881

FEATURES

APPLICATIONS

234

•

Sample Rate: 1 MHz

No Latency Output

•

Automatic Test Equipment (ATE)

Instrumentation and Process Controls

Precision Medical Equipment

•

Unipolar, True-Differential Input Range:

–V_REFto +V_REF

Low-Power, Battery-Operated Instruments

Wide Common-Mode Voltage Range:

0 V to V_REFwith 90-dB CMRR (min)

DESCRIPTION

The ADS8881 is an 18-bit, 1-MSPS, true-differential

input, analog-to-digital converter (ADC). The device

operates with a 2.5-V to 5-V external reference,

offering a wide selection of signal ranges without

additional input signal scaling. The reference voltage

setting is independent of, and can exceed, the analog

supply voltage (AVDD).

SPI™-Compatible Serial Interface with

Daisy-Chain Option

Excellent AC and DC Performance:

–

SNR: 100 dB, THD: –115 dB

INL: ±1.5 LSB (typ), ±3.0 LSB (max)

DNL: +1.5 and –1 LSB (max), 18-Bit NMC

The device offers an SPI-compatible serial interface

that also supports daisy-chain operation for

cascading multiple devices. An optional busy-

indicator bit makes synchronizing with the digital host

easy.

•

Wide Operating Range:

–

AVDD: 2.7 V to 3.6 V

DVDD: 2.7 V to 3.6 V

(Independent of AVDD)

–

REF: 2.5 V to 5 V (Independent of AVDD)

Operating Temperature: –40°C to +85°C

The device supports unipolar, true-differential analog

input signals with a differential input swing of –V_REFto

+V_REF. This true-differential analog input structure

allows for a common-mode voltage of any value in

the range of 0 V to +V_REF(when both inputs are

within the operating input range of –0.1 V to V_REF

+ 0.1 V).

Low-Power Dissipation:

–

5.5 mW at 1 MSPS

0.55 mW at 100 kSPS

55 µW at 10 kSPS

•

Power-Down Current (AVDD): 50 nA

Full-Scale Step Settling to 18 Bits: 290 ns

Packages: MSOP-10 and SON-10

Device operation is optimized for very low-power

operation. Power consumption directly scales with

speed. This feature makes the ADS8881 excellent for

lower-speed applications.

2.5 V to 5 V 2.7 V to 3.6 V

True-Differential Input Range

V_DIFF

Traditional Input Range

ADS8881 Input Range

+V_REF

AVDD

DVDD

REF

0 V - V_REF

V_REF

AINP

AINM

DIN

SCLK

V_CM

ADS8881

0 V

V_REF

DOUT

0 V

CONVST

0 V - V_REF

V_REF/2

GND

-V_REF

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.

TINA is a trademark of Texas Instruments Inc..

SPI is a trademark of Motorola Inc.

All other 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 the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...44

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与ADS8881相关器件

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ADS8881CDGS	TI	获取价格	具有真差分输入、SPI 接口和菊花链的 18 位、1MSPS、单通道 SAR ADC \|
ADS8881CDGSR	TI	获取价格	具有真差分输入、SPI 接口和菊花链的 18 位、1MSPS、单通道 SAR ADC \|
ADS8881CDRCR	TI	获取价格	18-Bit, 1-MSPS, 1-Ch SAR ADC with True-Differential Input, SPI Interface and Daisy-Chain 1
ADS8881CDRCT	TI	获取价格	具有真差分输入、SPI 接口和菊花链的 18 位、1MSPS、单通道 SAR ADC \|
ADS8881IDGS	TI	获取价格	18-Bit, 1-MSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Anal
ADS8881IDGSR	TI	获取价格	18-Bit, 1-MSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Anal
ADS8881IDRCR	TI	获取价格	18-Bit, 1-MSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Anal
ADS8881IDRCT	TI	获取价格	18-Bit, 1-MSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Anal
ADS8883	TI	获取价格	18-Bit, 100-kSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR An
ADS8883IDGS	TI	获取价格	具有真差分输入、SPI 接口和菊花链的 18 位、680kSPS、单通道 SAR ADC

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