BurrBrown Products

from Texas Instruments

FEATURES

DESCRIPTION

APPLICATIONS

Successive Approximation Register

Clock

Comparator

CS

CDAC

Buffer

REF

CAP

10 k

Ω

4.9 k

Ω

Internal

+2.5 V Ref

4 k

Ω

Serial

Data

Out

&

Control

BUSY

DATACLK

DATA

2.5 k

Ω

9.8 k

Ω

EXT/INT

R/C

SB/BTC

PWRD

ADS8509

SLAS324A – OCTOBER 2004 – REVISED JUNE 2005

16-BIT 250-KSPS SERIAL CMOS SAMPLING ANALOG-TO-DIGITAL CONVERTER

•

250-kHz Sampling Rate

The

ADS8509

is

a

complete

16-bit

sampling

analog-to-digital (A/D) converter using state-of-the-art

•

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

CMOS structures. It contains a complete 16-bit,

Ranges

capacitor-based, successive approximation register

•

±2.0 LSB Max INL

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

•

±1 LSB Max DNL, 16-Bit No Missing Codes

ence, clock, and a serial data interface. Data can be

output

using

the

internal

clock

or

can

be

•

SPI Compatible Serial Output with

synchronized to an external data clock. The ADS8509

Daisy-Chain (TAG) Feature

also provides an output synchronization pulse for

•

Single 5-V Supply

ease of use with standard DSP processors.

•

Pin-Compatible With ADS7809 (Low Speed)

The ADS8509 is specified at a 250-kHz sampling rate

and 12-Bit ADS8508/7808

over the full temperature range. Precision resistors

•

Uses Internal or External Reference

provide various input ranges including ±10 V and 0 V

•

70-mW Typ Power Dissipation at 250 KSPS

to 5 V, while the innovative design allows operation

from a single +5-V supply with power dissipation

•

20-Pin SO and 28-Pin SSOP Packages

under 100 mW.

•

Simple DSP Interface

The ADS8509 is available in 20-pin SO and 28-pin

SSOP packages, both fully specified for operation

over the industrial -40°C to 85°C temperature range.

•

Industrial Process Control

•

Data Acquisition Systems

•

Digital Signal Processing

•

Medical Equipment

•

Instrumentation

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2005, 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.