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Features
- 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
- 2.5V to 5.5V Supply Voltage
- 1.8V Reference Voltage Output
- 3.5ms VPTAT Update Time
- 4mV/°K Output Gain
- 170μA Quiescent Current
- Available in 6-Pin 2mm × 3mm DFN Package
Typical Application
Description
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 diodeconnected 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 1.8V reference voltage output which can be used as an ADC reference input or for generating temperature threshold voltages to compare against the VPTAT output.
The LTC2997 provides a precise and versatile micropower solution for accurate temperature sensing.
2x3 DFN-6
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC2997CDCB#PBF | DFN | 6 | C | $2.07 | |
| LTC2997CDCB#TRMPBF | DFN | 6 | C | $2.07 | $1.50 |
| LTC2997CDCB#TRPBF | DFN | 6 | C | $2.07 | $1.45 |
| LTC2997HDCB#PBF | DFN | 6 | H | $2.74 | |
| LTC2997HDCB#TRMPBF | DFN | 6 | H | $2.74 | $1.97 |
| LTC2997HDCB#TRPBF | DFN | 6 | H | $2.74 | $1.92 |
| LTC2997IDCB#PBF | DFN | 6 | I | $2.38 | |
| LTC2997IDCB#TRMPBF | DFN | 6 | I | $2.38 | $1.72 |
| LTC2997IDCB#TRPBF | DFN | 6 | I | $2.38 | $1.67 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1767A | LTC2997 | Internal/Remote Temperature Sensor | $50.00 |