LM94022 Texas instruments

LM94022

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LM94022

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Описание

The LM94022/-Q1 device is a precision analog output CMOS integrated-circuit temperature sensor with selectable linear negative temperature coefficient (NTC). A class-AB output structure gives the LM94022/-Q1 strong output source and sink current capability for driving heavy transient loads such as that presented by the input of a sample-and-hold analog-to-digital converter. The low 5.4-µA supply current and 1.5-V operating voltage of the LM94022/-Q1 make it ideal for battery-powered systems as well as general temperature-sensing applications. The Gain Select 1 (GS1) and Gain Select 0 (GS0) logic inputs select one of four gains for the temperature-to-voltage output transfer function: −5.5 mV/°C, −8.2 mV/°C, −10.9 mV/°C, and −13.6 mV/°C. Selecting –5.5 mV/°C (GS1 and GS0 both tied low), allows the LM94022/-Q1 to operate down to 1.5-V supply while measuring temperature over the full range of −50°C to +150°C. Maximum temperature sensitivity, –13.6 mV/°C, is selected when GS1 and GS0 are both tied high. The gain-select inputs can be tied directly to VDD or Ground without any pullup or pulldown 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.

LM94022/-Q1 is AEC-Q100 Grade 0 qualified and
is Manufactured on an Automotive Grade Flow
Low 1.5-V to 5.5-V Operation With Low 5.4-µA
Supply Current
Push-Pull Output With ±50-µA Source Current Capability
Four Selectable Gains
Very Accurate Over Wide Temperature Range of
−50°C to +150°C:
- ±1.5ºC Temperature Accuracy for 20ºC to
  40ºC Range
- ±1.8ºC Temperature Accuracy for –50ºC to
  70ºC Range
- ±2.1ºC Temperature Accuracy for –50ºC to
  90ºC Range
- ±2.7ºC Temperature Accuracy for –50ºC to
  150ºC Range
Output is Short-Circuit Protected
Extremely Small SC70 Package
For the Similar Functionality in a TO-92 Package,
See LMT84, LMT85, LMT86, or LMT87
Footprint Compatible With the Industry-Standard
LM20 Temperature Sensor

Local sensor accuracy (max)	1.5
Operating temperature range (°C)	-50 to 150
Supply voltage (min) (V)	1.5
Supply voltage (max) (V)	5.5
Supply current (max) (µA)	8.1
Interface type	Analog output
Sensor gain (mV/°C)	-5.5 to -13.6
Rating	Catalog
Features	Selectable gain setting, UL recognized