1FEATURES

2• 0V to Analog Supply Input Range

• Serial I/O (MICROWIRE Compatible)

• Software or Hardware Power Down

• Analog Input Sample/Hold Function

• Ratiometric or Absolute Voltage Referencing

• No Zero or Full Scale Adjustment Required

• No Missing Codes Over Temperature

• TTL/CMOS Input/Output Compatible

APPLICATIONS

• Medical Instruments

• Portable and Remote Instrumentation

• Test Equipment

KEY SPECIFICATIONS

• Resolution 10 Bits Plus Sign

• Single Supply 5 V

• Power Consumption 37 mW (Max)

• In Power Down Mode 18 μW

• Conversion Time 5 μs (Max)

• Sampling Rate 74 kHz (Max)

• Band-Gap Reference 2.5V ±2% (Max)

DESCRIPTION

The ADC10731, ADC10732 and ADC10734 are

obsolete or on lifetime buy and included for

reference only.

This series of CMOS 10-bit plus sign successive

approximation A/D converters features versatile

analog input multiplexers, sample/hold and a 2.5V

band-gap reference. The 1-, 2-, 4-, or 8-channel

multiplexers can be software configured for single-

ended or differential mode of operation.

An input sample/hold is implemented by a capacitive

reference ladder and sampled-data comparator. This allows the analog input to vary during the A/D

conversion cycle.

In the differential mode, valid outputs are obtained

even when the negative inputs are greater than the

positive because of the 10-bit plus sign output data

format.

The serial I/O is configured to comply with the

MICROWIRE serial data exchange standard for easy interface to the COPS and HPC families of

controllers, and can easily interface with standard

shift registers and microprocessors.