GND

REF

ADS8887

AINP

AINM

AVDD

DVDD

DIN

SCLK

DOUT

CONVST

0 V

0 V

2.5 V to 5 V

2.7 V to 3.6 V

Traditional Input Range

ADS8887 Input Range

True-Differential Input Range

1.65 V to 3.6 V

ADS8887

www.ti.com

SBAS613A – MAY 2013 – REVISED DECEMBER 2013

18-Bit, 100-kSPS, Serial Interface, microPower, Miniature,

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

Check for Samples: ADS8887

1

FEATURES

APPLICATIONS

234

•

Sample Rate: 100 kHz

•

Automatic Test Equipment (ATE)

•

No Latency Output

•

Instrumentation and Process Controls

•

Unipolar, True-Differential Input Range:

•

Precision Medical Equipment

•

Low-Power, Battery-Operated Instruments

•

Wide Common-Mode Voltage Range:

DESCRIPTION

The ADS8887 is an 18-bit, 100-kSPS, true-differential

•

SPI™-Compatible Serial Interface with

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

Daisy-Chain Option

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

•

Excellent AC and DC Performance:

offering a wide selection of signal ranges without

–

SNR: 100 dB, THD: –115 dB

additional input signal scaling. The reference voltage

setting is independent of, and can exceed, the analog

–

INL: ±1.5 LSB (typ), ±3.0 LSB (max)

supply voltage (AVDD).

–

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

The device offers an SPI-compatible serial interface

•

Wide Operating Range:

that

also

supports

daisy-chain

operation

for

–

AVDD: 2.7 V to 3.6 V

cascading multiple devices.

–

DVDD: 1.65 V to 3.6 V

The device supports unipolar, true-differential analog

(Independent of AVDD)

–

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

–

Operating Temperature: –40°C to +85°C

allows for a common-mode voltage of any value in

•

Low-Power Dissipation:

–

0.7 mW at 100 kSPS

+ 0.1 V).

–

70 µW at 10 kSPS

Device operation is optimized for very low-power

•

Power-Down Current (AVDD): 50 nA

operation. Power consumption directly scales with

•

Full-Scale Step Settling to 18 Bits: 1200 ns

speed. This feature makes the ADS8887 excellent for

lower-speed applications.

•

Packages: MSOP-10 and SON-10

1

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.

2

TINA is a trademark of Texas Instruments Inc..

3

SPI is a trademark of Motorola Inc.

4

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.