The LTC®2997 is a high-accuracy analog output temperature sensor. It converts the temperature of an external sensor or its own temperature to an analog voltage output. A built-in algorithm eliminates errors due to series resistance between the LTC2997 and the sensor diode.
The LTC2997 gives accurate results with low-cost diode-connected NPN or PNP transistors or with integrated temperature transistors on microprocessors or FPGAs. Tying pin D+ to VCC configures the LTC2997 to measure its internal temperature.
The LTC2997 provides an additional 1.8 V reference voltage output which can be used as an ADC reference input or for generating temperature threshold voltages to compare against the VPTAT output.
Click to see the DC1767A: Remote/Internal Temp Sensor Reference Design.
- Converts remote sensor or internal diode
- Temperature-to-analog voltage
- ±1°C remote temperature accuracy
- ±1.5°C internal temperature accuracy
- Built-in series resistance cancellation
- 2.5 V to 5.5 V supply voltage
- 1.8 V reference voltage output
- 3.5 ms VPTAT update time
- 4 mV/°K output gain
- 170 μA quiescent current
- Available in 6-pin 2 mm × 3 mm DFN package
- Temperature measurement
- Remote temperature measurement
- Environmental monitoring
- System thermal control
- Desktop and notebook computers
- Network servers