SDI

SCLK

SDO

CDAC

SAR

Comparator

Output

Latch

and

3-State

Driver

Conversion

and

Control

Logic

_

+

FS/CS

CONVST

EOC/INT/CDI

RESET

REF+

M

U

X

ADCIN

MUXOUT

IN[0:3]

or

IN[0:7]

COM

REF-

ADS8331

ADS8332

www.ti.com

SBAS363 – DECEMBER 2009

Low-Power, 16-Bit, 500kSPS, 4-/8-Channel Unipolar Input

ANALOG-TO-DIGITAL CONVERTERS with Serial Interface

Check for Samples: ADS8331, ADS8332

1

FEATURES

DESCRIPTION

234

•

Low-Power, Flexible Supply Range:

The

ADS8331

is

a

low-power,

16-bit,

500k

samples-per-second (SPS) analog-to-digital converter

–

2.7V to 5.5V Analog Supply

(ADC) with a unipolar, 4-to-1 multiplexer (mux) input.

–

8.7mW (250kSPS in Auto-Nap Mode,

The

device

includes

a

16-bit

capacitor-based

VA = 2.7V, VBD = 1.65V)

successive approximation register (SAR) ADC with

–

14.2mW (500kSPS, VA = 2.7V, VBD = 1.65V)

inherent sample and hold.

•

Up to 500kSPS Sampling Rate

The ADS8332 is based on the same core and

•

Excellent DC Performance:

includes a unipolar 8-to-1 input mux. Both devices

offer a high-speed, wide-voltage serial interface and

–

±1.2 LSB Typ, ±2 LSB Max INL at 2.7V

are capable of daisy-chain operation when multiple

–

±0.6 LSB Typ, –1.0/1.5 LSB Max DNL at 2.7V

converters are used.

–

16-Bit NMC Over Temperature

These converters are available in 24-pin, 4x4 QFN

•

–

91.5dB SNR, 101dB SFDR, –100dB THD

for operation over the industrial –40°C to +85°C

temperature range.

•

Flexible Analog Input Arrangement:

–

On-Chip 4-/8-Channel Mux with Breakout

Low-Power, High-Speed, SAR Converter Family

–

Auto/Manual Channel Select and Trigger

RESOLUTION/TYPE

CHANNELS

500kSPS

1MHz

•

Other Hardware Features:

1

ADS8327

ADS8329

–

On-Chip Conversion Clock (CCLK)

2

ADS8328

ADS8330

16-Bit Pseudo-Diff

–

Software/Hardware Reset

4

ADS8331

—

8

ADS8332

—

–

Programmable Status/Polarity EOC/INT

1

—

ADS7279

–

Daisy-Chain Mode

2

—

ADS7280

–

Global CONVST (Independent of CS)

14-Bit Pseudo-Diff

4

ADS8301

—

–

Deep, Nap, and Auto-Nap Powerdown

8

ADS8302

—

Modes

1

—

ADS7229

–

SPI™/DSP Compatible Serial Interface

12-Bit Pseudo-Diff

2

—

ADS7230

–

Separate I/O Supply: 1.65V to VA

–

SCLK up to 40MHz (VA = VBD = 5V)

BLANKSPACE

•

Functional Block Diagram

APPLICATIONS

•

Communications

•

Transducer Interfaces

•

Medical Instruments

•

Magnetometers

•

Industrial Process Control

•

Data Acquisition Systems

•

Automatic Test Equipment

(1)

TSSOP (PW) package available Q1, 2010.

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

TMS320 is a trademark of Texas Instruments.

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 © 2009, 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.