MP3276

V_CC to DGND . . . . . . . . . . . . . . . . . . .  . . . .0 to +16.5 V
V_EE to DGND  . . . . . . . . . . . . . . . . . . . . . . .0 to 16.5 V
V_DD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . .0 to +7 V
AGND to DGND  . . . . . . . . . . . . . . . . . . . .. . . . . . . .±1 V
Digital Inputs/Outputs
to DGND  . . . . . . . . . . . . . . . . .0.5 V to V_LOGIC +0.5 V
Analog Inputs (AIN0 AIN31, GND REF)
to AGND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .±60 V
REF OUT  . . . . . . . . . . . . . . . . .Indefinite short to DGND,
Momentary short to VCC
Maximum Junction Temperature  . . . . . . . .. . . . .150°C
Package Power Dissipation Rating to 75°C
PGA, PLCC . . . . . . . . . . . . . . . . . . . . . . . . . . . .1800 mW
Derates above 75°C . . . . . . . . . . . . . . . . . .25 mW/°C
Lead Temperature, Soldering . . . . . . . . .300°C, 10 Sec
Storage Temperature (Ceramic)  . . .65°C to +150°C
NOTES:
1 Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation at or above this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.
2 Any input pin which can see a value outside the absolute maximum ratings should be protected by Schottky diode clamps (HP5082-2835) from input pin to the supplies. All logic inputs have protection diodes which will protect the device from short transients outside the supplies of less than 100mA for less than 100ms.

The MP3276 is a complete 16-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 MP3276 combines a 16-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 15ms, and a mux/instrumentation amp settling period of less than 10ms.

A unique input design provides input overvoltage protection to
50 V over the supply voltages. The MP3276 design can allow for an overvoltage condition on unselected channels without disrupting the measured channel or operation of the MP3276! The internal 4 V reference has sufficient output current to provide other system reference needs. Precision thin film scaling and offset resistors are laser trimmed to provide for less than 2 LSB INL for +10 V inputs on all channels.

In addition, the MP3276 will output either full scale (0111 ....) for overrange and full scale (1000....) for underrange conditions. This greatly simplifies microprocessor software development.