+V

VCM

+V

+V

R

C

C

R

AINP

AINM

+V

VCM

+V

+V

R

C

C

R

AINP

AINM

Internal

Reference

ADS7851,

ADS7251

Product

Folder

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Buy

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ADS7251, ADS7851

SBAS587A – JANUARY 2014 – REVISED APRIL 2014

ADS7x51 12-Bit, 2-MSPS and 14-Bit, 1.5-MSPS, Dual, Differential Input, Simultaneous-

Sampling, Analog-to-Digital Converters with Internal Reference

1 Features

3 Description

The ADS7251 and ADS7851 belong to a family of

1

•

12- and 14-Bit Pin-Compatible Family

pin-compatible,

dual,

high-speed,

simultaneous-

•

Simultaneous Sampling of Two Channels

sampling, analog-to-digital converters (ADCs) that

•

Supports Fully-Differential Analog Inputs

support fully-differential analog inputs and feature two

independent

internal

voltage

references.

The

•

Independent Internal Reference (per ADC)

ADS7251 offers 12-bit resolution and up to 2-MSPS

•

High Speed:

sampling

speed.

The

ADS7851

offers

14-bit

–

Up to 2 MSPS with the ADS7251 (12-Bit)

resolution and up to 1.5-MSPS sampling speed.

–

Up to 1.5 MSPS with the ADS7851 (14-Bit)

The devices support a wide digital supply voltage

•

Excellent Performance:

range, allowing easy communication with a variety of

digital host controllers using a simple, serial interface.

–

ADS7251:

Both devices are fully specified over the extended

–

SNR: 73 dB

industrial temperature range (–40°C to +125°C) and

–

INL: ±1 LSB

are available in a pin-compatible, space-saving,

WQFN-16 (3-mm × 3-mm) package.

–

ADS7851:

–

SNR: 83.5 dB

Device Information

–

INL: ±2 LSB

ORDER NUMBER

PACKAGE

BODY SIZE

•

Fully-Specified Over the Extended Industrial

ADS7251RTE

WQFN (16)

3 mm × 3 mm

Temperature Range: –40°C to +125°C

ADS7851RTE

WQFN (16)

3 mm × 3 mm

•

Small Footprint: WQFN-16 (3 mm × 3 mm)

Typical Application Diagram

2 Applications

•

Motor Control: Direct Interface to SinCos

Encoders

•

Optical Networking: EDFA Gain Control Loop

•

Protection Relays

•

Power Quality Measurement

•

Three-Phase Power Controls

•

Programmable Logic Controllers

•

Industrial Automation

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.