FEATURES
q OPTIMIZED FOR PRECISION 10kΩ THERMISTOR APPLICATIONS
q LOW OFFSET OVER TEMPERATURE: 0.009°C Temperature Error, –40°C to +85°C q EXCELLENT LONG-TERM STABILITY q VERY LOW 1/f NOISE: (0.01Hz to 10Hz) (Peak-to-Peak Equivalent to 0.0001°C) q WIDE OUTPUT SWING: Within 10mV of Rails q SUPPLY RANGE: Single +2.7V to +5.5V q microPACKAGE: MSOP-10 q REQUIRES ONLY ONE PRECISION RESISTOR APPLICATIONS
q THERMISTOR-BASED TEMPERATURE CONTROLLERS FOR OPTICAL NETWORKING q HIGH ACCURACY FOR TEC APPLICATIONS
q LASER TEMPERATURE CONTROL DESCRIPTION
It uses only one precision resistor plus the thermistor, thus providing an alternative to the traditional bridge circuit. This new topology eliminates the need for two precision resistors while maintaining excellent accuracy for temperature control applications. An excitation voltage is applied to the thermistor (RTHERM) and precision resistor (RSET), creating currents I1 and I2. The current conveyor circuit produces an output current, IO, equal to I1 – I2, which flows through the external gain-setting resistor.
Burr-Brown Corporation
