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LM94022BIMGX Datasheet

  • LM94022BIMGX

  • 1.5V, SC70, Multi-Gain Analog Temperature Sensor with Class-...

  • 704.31KB

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LM94022 1.5V, SC70, Multi-Gain Analog Temperature Sensor with Class-AB Output
May 2005
LM94022
1.5V, SC70, Multi-Gain Analog Temperature Sensor with
Class-AB Output
General Description
The LM94022 is a precision analog output CMOS
integrated-circuit temperature sensor that operates at a sup-
ply 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 鈭?0藲C to
+150藲C, the LM94022 delivers an output voltage that is
inversely porportional to measured temperature. The
LM94022鈥檚 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: 鈭?.5 mV/藲C,
鈭?.2 mV/藲C, 鈭?0.9 mV/藲C, and 鈭?3.6 mV/藲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 鈭?0藲C to +150藲C operating range.
Tying both inputs high causes the transfer function to have
the largest gain of 鈭?3.6 mV/藲C for maximum temperature
sensitivity. The gain-select inputs can be tied directly to V
DD
or Ground without any pull-up or pull-down resistors, reduc-
ing 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.
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Battery Management
Automotive
Disk Drives
Games
Appliances
Features
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Low 1.5V operation
Push-pull output with 50碌A(chǔ) source current capability
Four selectable gains
Very accurate over wide temperature range of 鈭?0藲C to
+150藲C
Low quiescent current
Output is short-circuit protected
Extremely small SC70 package
Footprint compatible with the industry-standard LM20
temperature sensor
Key Specifications
j
Supply Voltage
j
Supply Current
j
Output Drive
j
Temperature
1.5V to 5.5V
5.4 碌A(chǔ) (typ)
20藲C to 40藲C
-50藲C to 70藲C
-50藲C to 90藲C
-50藲C to 150藲C
Accuracy
Applications
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Cell phones
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Wireless Transceivers
鹵
50 碌A(chǔ)
鹵
1.5藲C
鹵
1.8藲C
鹵
2.1藲C
鹵
2.7藲C
鈭?0藲C to 150藲C
j
Operating
Temperature
Connection Diagram
SC70-5
Typical Transfer Characteristic
Output Voltage vs Temperature
20143001
Top View
See NS Package Number MAA05A
20143024
漏 2005 National Semiconductor Corporation
DS201430
www.national.com

LM94022BIMGX 產(chǎn)品屬性

  • National Semiconductor (TI)

  • Analog

  • +/- 2.7 C

  • + 150 C

  • - 50 C

  • Reel

  • Temperature Sensor

  • - 13.6 mV / C

  • 1.5 V to 5.5 V

  • 3000

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