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GENERAL DESCRIPTION

The AD7854/AD7854L is a high speed, low power, 12-bit ADC that operates from a single 3 V or 5 V power supply, the AD7854 being optimized for speed and the AD7854L for low power. The ADC powers up with a set of default conditions at which time it can be operated as a read-only ADC. The ADC contains self-calibration and system calibration options to ensure accurate operation over time and temperature and has a number of power-down options for low power applications.

FEATURES

Specified for VDD of 3 V to 5.5 V

Read-Only Operation

AD7854–200 kSPS; AD7854L–100 kSPS

System and Self-Calibration

Low Power

Normal Operation

AD7854: 15 mW (VDD = 3 V)

AD7854L: 5.5 mW (VDD = 3 V)

Automatic Power-Down After Conversion (25 μW)

AD7854: 1.3 mW 10 kSPS

AD7854L: 650 μW 10 kSPS

Flexible Parallel Interface

12-Bit Parallel/8-Bit Parallel (AD7854)

28-Lead DIP, SOIC and SSOP Packages (AD7854)

APPLICATIONS

Battery-Powered Systems (Personal Digital Assistants, Medical Instruments, Mobile Communications)

Pen Computers

Instrumentation and Control Systems

High Speed Modems