Packaging information
| Package | Pins SOT-SC70 (DCK) | 5 |
| Operating temperature range (°C) -50 to 150 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the LM94021
- LM94021Q is AEC-Q100 Grade 0 Qualified
and is Manufactured on an Automotive Grade Flow - Low 1.5V Operation
- Four Selectable Gains
- Very Accurate Over Wide Temperature Range of
−50°C to +150°C - Low Quiescent Current
- Output is Short-Circuit Protected
- Extremely Small SC70 Package
- Footprint Compatible with the Industry-Standard
LM20 Temperature Sensor - UL Recognized Component
Description for the LM94021
The LM94021 is a precision analog output CMOS integrated-circuit temperature sensor that operates at a supply voltage as low as 1.5V. While operating over the wide temperature range of −50°C to +150°C, the LM94021 delivers an output voltage that is inversely proportional to measured temperature. The LM94021's low supply current makes it ideal for battery-powered systems as well as general temperature sensing applications.
Two logic inputs, Gain Select 1 (GS1) and Gain Select 0 (GS0), select the gain of the temperature-to-voltage output transfer function. Four slopes are selectable: −5.5 mV/°C, −8.2 mV/°C, −10.9 mV/°C, and −13.6 mV/°C. In the lowest gain configuration (GS1 and GS0 both tied low), the LM94021 can operate with a 1.5V supply while measuring temperature over the full −50°C to +150°C operating range. Tying both inputs high causes the transfer function to have the largest gain of −13.6 mV/°C for maximum temperature sensitivity. The gain-select inputs can be tied directly to VDD or Ground without any pull-up or pull-down resistors, reducing component count and board area. These inputs can also be driven by logic signals allowing the system to optimize the gain during operation or system diagnostics.