BurrBrown Products

from Texas Instruments

1

FEATURES

APPLICATIONS

DESCRIPTION

Successive Approximation Register

Clock

Comparator

CS

CDAC

Buffer

REF

CAP

40 k

Ω

9.9 k

Ω

Internal

+2.5 V Ref

6 k

Ω

Parallel

and

Serial

Data

Out

&

Control

BUSY

BUSY

DATACLK

TAG

20 k

Ω

39.8 k

Ω

EXT/IN

R/C

SB/BTC

BYTE

REFD

Parallel

Data

PWRD

SDATA

ADS8506

SLAS484A – SEPTEMBER 2007 – REVISED OCTOBER 2007

12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH

INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE

• Industrial Process Control

2

• 40-kHz Min Sampling Rate

• Test Equipment

• 4-V, 5-V, and ±10-V Input Ranges

• Medical Equipment

• 73.9-dB SINAD with 10-kHz Input

• Data Acquisition Systems

• ±0.45 LSB Max INL

• Digital Signal Processing

• ±0.45 LSB Max DNL, 12-Bit No Missing Codes

• Instrumentation

• ±5-mV BPZ, ±0.5 PPM/°C BPZ Drift

• SPI Compatible Serial Output With

Daisy-Chain (TAG) Feature

The ADS8506 is a complete low power, single 5-V

• Single 5-V Analog Supply

supply,

12-bit

sampling

analog-to-digital

(A/D)

• Pin-Compatible With ADS7806 and 16-Bit

converter.

It

contains

a

complete

12-bit

ADS7807/8507

capacitor-based, successive approximation register

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

• Uses Internal or External 2.5-V Reference

reference, and data interface. The converter can be

• Low Power Dissipation

configured for a variety of input ranges including ±10

–

24 mW Typ, 30 mW Max at 40 KSPS

V, 4 V, and 5 V. For most input ranges, the input

voltage can swing to 25 V or –25 V without damage

• 50-μW Max Power Down Mode

to the converter.

• 28-Pin SO Package

A SPI compatible serial interface allows data to be

• Full Parallel Interface

synchronized to an internal or external clock. A full

• 2's Comp or BTC Output Code

parallel interface with BYTE select is also provided to

allow the maximum system design flexibility. The

ADS8506 is specified at 40 kHz sampling rate over

the industrial -40

°C to 85°C 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

QSPI, SPI are trademarks of Motorola.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, 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.