1

FEATURES

APPLICATIONS

DESCRIPTION

Successive ApproximationRegister

Clock

Comparator

CDAC

Buffer

REF

BUF

8kW

Internal

+2.5VRef

4 kW

Serial

Data

Out

and

Control

40kW

EXT/INT

PWRD

BUSY

CS

CONV

SDATA

DATACLK

CAP

20kW

ADS8512

12-Bit, 40-kSPS, Low Power Sampling ANALOG-TO-DIGITAL CONVERTER

with Internal Reference and Serial Interface

• Industrial Process Control

234

• 40-kHz Minimum Sampling Rate

• Test Equipment

• Very Low Power: 25 mW

• Robotics

• ±3.33-V, ±5-V, ±10-V, 4-V, and 10-V Input

• DSP Servo Control

Ranges

• Medical Instrumentation

• 73.9-dB SINAD with 10-kHz Input

• Portable Data Acquisition Systems

• ±0.5 LSB Max INL

• ±0.5 LSB Max DNL, 12-Bit NMC

• ±5-mV BPZ, ±2 ppm/°C BPZ Drift

The ADS8512 is a complete low-power, single 5-V

• 72-dB Min SINAD, 80-dB Min SFDR

supply,

12-bit

sampling

analog-to-digital

(A/D)

• Uses Internal or External 2.5-V Reference

converter.

It

contains

a

complete

12-bit

capacitor-based, successive approximation register

• No External Calibration Resistors Required

(SAR) A/D converter with sample-and-hold (S/H),

• Single 5-V Analog Supply:

clock, reference, and serial data interface. The

–

32.5-mW Max Power Dissipation

converter can be configured for a variety of input

ranges including ±10 V, ±5 V, 0 V to 10 V, and 0.5 V

–

50-

µW Max Power-Down Mode

to 4.5 V. A high-impedance, 0.3-V to 2.8-V input is

• SPI™-Compatible Serial Port up to 20MHz,

also available with input impedance greater than 10

with Master/Slave Feature

M

Ω. For most input ranges, the input voltage can

• Global CONV and 3-Stated Bus for Multi-Chip

swing to 25 V or –25 V without damage to the

Simultaneous S/H Operation

converter.

• Pin-Compatible with ADS7812 and 16-Bit

An SPI-compatible serial interface allows data to be

ADS7813/8513

synchronized to an internal or external clock. The

ADS8512 is specified at 40-kHz sampling rate over

• SO-16 Package

the –40°C to +85°C industrial temperature range.

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 © 2008, 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.