LM94022
LM94022 is Multi-Gain Analog Temperature Sensor manufactured by National Semiconductor.
Description
The LM94022 is a precision analog output CMOS integratedcircuit temperature sensor that operates at a supply voltage as low as 1.5 Volts. A class-AB output structure gives the LM94022 strong output source and sink current capability for driving heavy loads. For example, it is well suited to source the input of a sample-and-hold analog-to-digital converter with its transient load requirements. While operating over the wide temperature range of
- 50°C to +150°C, the LM94022 delivers an output voltage that is inversely porportional to measured temperature. The LM94022'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 m V/°C,
- 8.2 m V/°C,
- 10.9 m V/°C, and
- 13.6 m V/°C. In the lowest gain configuration (GS1 and GS0 both tied low), the LM94022 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 m V/°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 ponent 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.
- Disk Drives
- Games
- Appliances
Features
- LM94022Q is AEC-Q100 Grade 0 qualified and is
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- - manufactured on an Automotive Grade Flow. Low 1.5V operation Push-pull output with 50µA source current capability 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 patible with the industry-standard LM20 temperature sensor
Key Specifications
- Supply Voltage
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