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1FEATURES

2? 250-kHz Sampling Rate

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

Ranges

? ±2 LSB Max INL

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

? SPI Compatible Serial Output with Daisy-Chain

(TAG) Feature

? Single 5-V Supply

? Pin-Compatible with ADS7809 (Low Speed)

and 12-Bit ADS8508/7808

? Uses Internal or External Reference

? 70-mW Typ Power Dissipation at 250 KSPS

? 20-Pin SO and 28-Pin SSOP Packages

? Simple DSP Interface

APPLICATIONS

? Industrial Process Control

? Data Acquisition Systems

? Digital Signal Processing

? Medical Equipment

? Instrumentation

DESCRIPTION

The ADS8509 is a complete 16-bit sampling

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

CMOS structures. It contains a complete 16-bit,

capacitor-based, successive approximation register (SAR) A/D converter with sample-and-hold,

reference, clock, and a serial data interface. Data can

be output using the internal clock or can be

synchronized to an external data clock. The ADS8509

also provides an output synchronization pulse for ease of use with standard DSP processors.

The ADS8509 is specified at a 250-kHz sampling rate

over the full temperature range. Precision resistors

provide various input ranges including ±10 V and 0 V

to 5 V, while the innovative design allows operation

from a single +5-V supply with power dissipation

under 100 mW.

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.