LTC2997

1

2997fa

TYPICAL APPLICATION

FEATURES

DESCRIPTION

Remote/Internal

Temperature Sensor

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 be-

tween 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.

its internal temperature.

The LTC2997 provides an additional 1.8V reference voltage

output which can be used as an ADC reference input or

for generating temperature threshold voltages to compare

The LTC2997 provides a precise and versatile micropower

solution for accurate temperature sensing.

Single Remote Temperature Sensor

APPLICATIONS

Temperature to Analog Voltage

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

VREF

4mV/K

1.8V

2.5V TO 5.5V

0.1μF

LTC2997

MMBT 3904

470pF

2997 TA01a

VCC

VPTAT

GND

REMOTE SENSOR TEMPERATURE (°C)

–50

0.8

1.0

1.2

1.4

050

100

150

2997 TA01b

1.6

1.8

–25

25

75

125