Features LM94022Q is AEC-Q100 Grade 0 qualified and is 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 compatible with the industry-standard LM20 temperature sensor Description The LM94022 is a precision analog output CMOS integrated-circuit 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 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 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 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. Key Specification ■  Supply Voltage 1.5V to 5.5V ■ Supply Current 5.4 μA (typ) ■ Output Drive   ±50 μA ■  Temperature Accuracy 20°C to 40°C -50°C to 70°C -50°C to 90°C -50°C to 150°C ±1.5°C ±1.8°C ±2.1°C ±2.7°C ■  Operating Temperature   −50°C to 150°C Applications Cell phones Wireless Transceivers Battery Management Automotive Disk Drives Games Appliances

Also Recommended LM94023▲ Smaller MicroSMD Package (0.8mm X 0.8mm) Full-Range Celsius Temperature Sensor Operating from a Single Cell Battery

Typical Application *click for larger image Full-Range Celsius Temperature Sensor Operating from a Single Cell Battery	Connection Diagram *click for larger image
Typical Performance *click for larger image Maximum Temperature Error vs Temperature

Parameters / Values	LM94022	LM94023
Temperature Accuracy (+/-)	1.5 deg C	1.5 deg C
Supply Min	1.5 Volt	1.5 Volt
Quiescent Current_	5.4 uA	8.1 uA
Temperature Min	-50 deg C	-50 deg C
Temperature Max	150 deg C	150 deg C
Sensor Gain	-5.5 to -13.6 mV/degC	-5.5 or -8.2 mV/degC
Supply Max	5.5 Volt	5.5 Volt
Single Supply	Yes	Yes
Output Impedance	5.2 Ohm	4.4 Ohm
Quiescent Current	0.0081 mA	0.0081 mA
AEC Q-100 Automotive Grade	0
Automotive	Yes	Yes
PowerWise	Yes	Yes

Datasheets

Title		Size	Date	Other Language
	LM94022 1.5V, SC70, Multi-Gain Analog Temperature Sensor with Class-AB Output	989 Kbytes	17-Mar-09	日本語

Application Notes

Title		Size	Date	Other Language
	AN-1952: Application Note 1952 Designing with Thermocouples	158 Kbytes	25-Feb-10

Other Technical Documents

Title		Type	Date
	Low-Voltage Current Loop Transmitter	Signal Path Designer	2007-08-02
	Temperature sensor solutions for low-voltage systems	Technology Edge	2005-05-11

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM94022BIMG/NOPB LM94022BIMG RoHS Status	SC-70	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1348 CEAC Asia Pacific 10000 DIGI-KEY Worldwide 9041 FARNELL Europe and Asia 1502 MOUSER Worldwide 415 NEWARK Americas 411 RS COMPONENTS Worldwide 520 RSL MICRO Asia Pacific 2000 TAYLOR Americas 15625 TECHMOSA Asia Pacific 101420	$0.35 each at 1K+ pcs	reel of 1000
LM94022BIMGX/NOPB LM94022BIMGX RoHS Status	SC-70	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 1975	$0.35 each at 1K+ pcs	reel of 3000
LM94022QBIMG/NOPB RoHS Status	SC-70	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1000 DIGI-KEY Worldwide 1807 MOUSER Worldwide 865 NEWARK Americas 1098 TAYLOR Americas 1000	$0.50 each at 1K+ pcs	reel of 1000

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM94022.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM94022 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM94022EVAL	LM94022EVAL Evaluation Board	Full production	Distributor Region Qty DIGI-KEY Worldwide 0	$120.00 each	1

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM94022BIMG/NOPB LM94022BIMG	7.65 7.7	SC-70	5	1 1	260 260	Detail	Download	N/A	22B XTT
LM94022BIMGX/NOPB LM94022BIMGX	7.65 7.7	SC-70	5	1 1	260 260	Detail	Download	N/A	22B XTT
LM94022QBIMG/NOPB	7.65	SC-70	5	1	260	Detail	Download	N/A	22Q XTT

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM94022.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM94022 is located at RoHS Status.

Design Tools

Title	Size	Date
LM94022 Design Aid (xls)

CAD Symbols and Models Download LM94022 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM94022BIMG	CMOS7	0	21301	0	0	1584000	3	449464325
LM94022BIMGX	CMOS7	0	21301	0	0	1584000	3	449464325
LM94022QBIMG	CMOS7	0	21301	0	0	1584000	3	449464325

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM94022.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM94022 is located at RoHS Status.

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