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