LM94022BIMG/NOPB National Semiconductor, LM94022BIMG/NOPB Datasheet

IC TEMP SENSOR ± 1.5°C TO ± 2.7°C SC70-5

LM94022BIMG/NOPB

Manufacturer Part Number
LM94022BIMG/NOPB
Description
IC TEMP SENSOR ± 1.5°C TO ± 2.7°C SC70-5
Manufacturer
National Semiconductor
Datasheet

Specifications of LM94022BIMG/NOPB

Ic Output Type
Voltage
Sensing Accuracy Range
± 2.7°C
Supply Current
5.4µA
Supply Voltage Range
1.5V To 5.5V
Sensor Case Style
SC-70
No. Of Pins
5
Msl
MSL 1 - Unlimited
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM94022BIMG/NOPB
Manufacturer:
ST
Quantity:
21 000
Part Number:
LM94022BIMG/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
© 2009 National Semiconductor Corporation
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 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 V
without any pull-up or pull-down resistors, reducing compo-
nent count and board area. These inputs can also be driven
by logic signals allowing the system to optimize the gain dur-
ing operation or system diagnostics.
Applications
Connection Diagram
Cell phones
Wireless Transceivers
Battery Management
Automotive
See NS Package Number MAA05A
Top View
SC70-5
20143001
201430
LM94022/LM94022Q
DD
or Ground
Features
Key Specifications
Typical Transfer Characteristic
■ 
■ 
Accuracy
■ 
Temperature
Disk Drives
Games
Appliances
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
Supply Current
Output Drive
Supply Voltage
Temperature
Operating
Output Voltage vs Temperature
-50°C to 150°C
-50°C to 70°C
-50°C to 90°C
20°C to 40°C
−50°C to 150°C
March 17, 2009
20143024
1.5V to 5.5V
www.national.com
5.4 μA (typ)
±50 μA
±1.5°C
±1.8°C
±2.1°C
±2.7°C

Related parts for LM94022BIMG/NOPB

LM94022BIMG/NOPB Summary of contents

Page 1

... Cell phones ■ Wireless Transceivers ■ Battery Management ■ Automotive Connection Diagram SC70-5 Top View See NS Package Number MAA05A © 2009 National Semiconductor Corporation LM94022/LM94022Q ■ Disk Drives ■ Games ■ Appliances Features ■ LM94022Q is AEC-Q100 Grade 0 qualified and is manufactured on an Automotive Grade Flow. ...

Page 2

... Typical Application Full-Range Celsius Temperature Sensor (−50°C to +150°C) Operating from a Single Battery Cell Ordering Information Order Temperature Number Accuracy LM94022BIMG ±1.5°C to ±2.7°C LM94022BIMGX ±1.5°C to ±2.7°C LM94022QBIMG ±1.5°C to ±2.7°C LM94022QBIMGX ±1.5°C to ±2.7°C www ...

Page 3

... Ground Equivalent Circuit Gain Select 1 - One of two inputs for selecting the slope of the output response Gain Select 0 - One of two inputs for selecting the slope of the output response Outputs a voltage which is inversely proportional to temperature Positive Supply Voltage Power Supply Ground 3 Function www.national.com ...

Page 4

... −50°C to +0° www.national.com Machine Model (Note 1) Soldering process must comply with National's −0.3V to +6.0V Reflow Temperature Profile specifications. Refer to www.national.com/packaging. (Note 4) −0. 0.5V) DD ±7 mA Operating Ratings −0.3V to +6. Specified Temperature Range: −65°C to +150°C ...

Page 5

... The typical DC line regulation specification does not include the output voltage shift discussed in Section 5.0. Note 12: Guaranteed by design and characterization. Note 13: The input current is leakage only and is highest at high temperature typically only 0.001µA. The 1µA limit is solely based on a testing limitation and does not reflect the actual performance of the part. ...

Page 6

... Typical Performance Characteristics Temperature Error vs. Temperature Supply Current vs. Temperature www.national.com Minimum Operating Temperature vs. Supply Voltage 20143007 Supply Current vs. Supply Voltage 20143004 6 20143006 20143005 ...

Page 7

Load Regulation, Sourcing Current Change in Vout vs. Overhead Voltage Load Regulation, Sinking Current 20143040 Supply-Noise Gain vs. Frequency 20143042 7 20143041 20143043 www.national.com ...

Page 8

Output Voltage vs. Supply Voltage Gain Select = 00 Output Voltage vs. Supply Voltage Gain Select = 10 www.national.com Output Voltage vs. Supply Voltage Gain Select = 01 20143034 Output Voltage vs. Supply Voltage Gain Select = 11 20143036 8 ...

Page 9

... The LM94022 has four selectable gains, each of which can be selected by the GS1 and GS0 input pins. The output volt- age for each gain, across the complete operating temperature range is shown in the LM94022 Transfer Table, below. This table is the reference from which the LM94022 accuracy specifications (listed in the Electrical Characteristics section) are determined ...

Page 10

Temperat ure (mV) (mV) (°C) 35 843 1283 36 838 1275 37 832 1267 38 827 1258 39 821 1250 40 816 1242 41 810 1234 42 804 1225 43 799 1217 44 793 ...

Page 11

... Using this method of linear approximation, the transfer func- 553 tion can be approximated for one or more temperature ranges 538 of interest. 11 and V are the coordinates and V are the coordinates of the 2 2 ...

Page 12

... To ensure good thermal conductivity, the backside of the LM94022 die is directly attached to the GND pin (Pin 2). The temperatures of the lands and traces to the other leads of the LM94022 will also affect the temperature reading. Alternatively, the LM94022 can be mounted inside a sealed- end metal tube, and can then be dipped into a bath or screwed into a threaded hole in a tank ...

Page 13

C. The larger gain is optimal for reducing the effects of noise (for example, noise coupling on the output line or quantization noise induced by an analog-to-digital converter ...

Page 14

... Most CMOS ADCs found in microcontrollers and ASICs have a sampled data comparator input structure. When the ADC charges the sampling cap, it requires instantaneous charge from the output of the analog source such as the LM94022 temperature sensor and many op amps. This requirement is easily accommodated by the addition of a capacitor (C on the size of the sampling capacitor and the sampling frequency ...

Page 15

Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM94022BIMG, LM94022BIMGX, LM94022QBIMG, LM94022QBIMGX 5-Lead SC70 Molded Package NS Package Number MAA05A 15 www.national.com ...

Page 16

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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