1FEATURES

2· 40-kHz Min Sampling Rate

· 4-V, 5-V, and ±10-V Input Ranges

· 73.9-dB SINAD with 10-kHz Input

· ±0.45 LSB Max INL

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

· ±5-mV BPZ, ±0.5 PPM/°C BPZ Drift

· SPI Compatible Serial Output With

Daisy-Chain (TAG), SPI Master/Slave Feature

· Single 5-V Analog Supply

· Pin-Compatible With ADS7806 and 16-Bit

ADS7807/8507

· Uses Internal or External 2.5-V Reference

· Low Power Dissipation

– 24 mW Typ, 30 mW Max at 40 KSPS

· 50-mW Max Power Down Mode

· 28-Pin SO Package

· Full Parallel Interface

· 2's Comp or BTC Output Code

APPLICATIONS

· Industrial Process Control

· Test Equipment

· Medical Equipment

· Data Acquisition Systems

· Digital Signal Processing

· Instrumentation

DESCRIPTION

The ADS8506 is a complete low power, single 5-V supply, 12-bit sampling analog-to-digital (A/D)

converter. It contains a complete 12-bit

capacitor-based, successive approximation register

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

reference, and data interface. The converter can be configured for a variety of input ranges including ±10

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

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

to the converter.

A SPI compatible serial interface allows data to be

synchronized to an internal or external clock. A full 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.