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UC3704

Unitrode
Part Number UC3704
Manufacturer Unitrode
Description Bridge Transducer Switch
Published Oct 1, 2019
Detailed Description UC3704 Bridge Transducer Switch FEATURES • Dual Matched Current Sources • High-gain Differential Sensing Circuit • Wid...
Datasheet PDF File UC3704 PDF File

UC3704
UC3704

Overview
UC3704 Bridge Transducer Switch FEATURES • Dual Matched Current Sources • High-gain Differential Sensing Circuit • Wide Common-mode Input Capability • Complementary Digital Open-collector Outputs • Externally Programmable Time Delay • Optional Output Latch with Reset • Built-in Diagnostic Activation • Wide Supply Voltage Range • High Current Heater Power Source Driver UC3704 COMPATIBLE SENSORS SENSOR TYPE Temperature Pressure Thermistor X Sensistor X Thermocouple X Semiconductor X X Photo Voltaic Photo Resistive Strain Gage X Piezoelectric X Magneto Resistive Inductive Hall Effect Capacitive BLOCK DIAGRAM DESCRIPTION This integrated circuit contains a complete signal conditioning system to interface low-level variable impedance transducers to a digital system.
A pair of matched, temperature-compensated current sources are provided for balanced transducer excitation followed by a precision, high-gain comparator.
The output of this comparator can be delayed by a user-selectable duration, after which a second comparator will switch complementary outputs separately activated for diagnostic operation and has an optional latch with external reset capability.
An added feature is a high current power source useful as a heater driver in differential temperature sensing applications.
The UC3704 is designed for 0°C to +70°C environments.
ACTIVATION SOURCE Force Position Displacement Velocity X X X XXX XXX XXXX X XX XX XXX XX Shock X X X X 6/93 ABSOLUTE MAXIMUM RATINGS Supply Voltage (+VIN).
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40V Output Current (each output) .
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50 mA Buffer Power Source Current .
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200mA Comparator 1 Inputs.
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-0.
5V to VREF Comparator 2 Inputs.
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0 to 5.
5V Remote Activation and Reset Inputs .
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0 to 5.
5V Power Diss...


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