GENERAL DESCRIPTION

The MP3274 is a complete 32-channel, 12-bit Data Acquisition Subsystem with 3-state output buffers for direct interfacing to 16-bit microprocessor buses. Implemented using an advanced BiCMOS process, the converter combines a 32-channel passive overvoltage protected multiplexer instrumentation amp, a sample & hold, a SAR, a 12-bit decoded D/A, a comparator, a precision reference and the control logic to achieve an accurate, repeated conversion in less than 15µs, and a mux/instrumentation amp settling period of less than 10µs.

FEATURES

• Complete 32-Channel 12-Bit A/D Converter with Sample & Hold, Reference, Clock and 3-State Outputs

• Fast Conversion, less than 15µS

• Microprocessor Bus Interface

• Parallel or Serial Data Output Modes

• 65 ns Bus Access Time

• Remote Analog Ground Sensing

• Overvoltage Protected Input (±50 V over the Supply Voltages)

• Precision Reference for Long Term Stability and Low Gain T.C.

• Guaranteed Linearity Over Temperature

• Guaranteed Performance at +12/–5 V, ±12 & ±15 V

• Low Power (3 mW per Channel Typical)

• 16 Channel Version: MP3276 & MP3275