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