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FM20

Part Number	FM20
Manufacturer	Fairchild Semiconductor
Description	Ultra-Low-Power Analog Temperature Sensor
Published	Mar 30, 2005
Detailed Description	www.fairchildsemi.com FM20 Ultra-Low-Power Analog Temperature Sensor Features • • • • • • • Analog Output, -11.77mV/°C...
Datasheet	FM20 PDF File

Overview

www.
fairchildsemi.
com FM20 Ultra-Low-Power Analog Temperature Sensor Features • • • • • • • Analog Output, -11.
77mV/°C Range, -55 to 130°C Accuracy, ±1°C at 25°C Supply Current, 9µA typical Output Drive, 1µA Self-heating < 0.
021°C Operating Voltage: +2.
4V to +6V Description As a precision CMOS temperature sensor, the FM20 is cost-effective for accurate low-power temperature monitoring applications.
Output voltage versus temperature is extremely linear.
With no load, the supply current is typically 1µA.
For normal operation, the load on VOUT should be 5MΩ or less.
In a typical application, a remotely mounted FM20 is monitored by a microcontroller with an analog A/D converter input.
Alternatively, the FM20 can drive a comparator with a high impedance input.
Accuracy is typically ±1°C at room temperature; and better than ±2.
5°C from 0 to 50°C.
Available packages are surface mount 5-pin SC70 and 3-pin SOT-23.
Applications • • • • • • • • Mobile Phones Computers Battery Management Ofﬁce Equipment HVAC Power Supply Modules Disk Drives Automotive Thermal Response VOUT (mV) 1863.
9 391 -50 -40 -25 0 25 50 75 100 125 Temperature (˚C) Temperature (˚C) = VOUT – 1863.
9mV –11.
77mV/˚C FM20 Output Voltage vs.
Temperature REV.
1.
0.
6 1/9/03 FM20 PRODUCT SPECIFICATION Pin Assignments VOUT 3 GND 2 N/C 1 GND 3 FM20 4 VDD 5 GND FM20 1 VDD 2 VOUT Pin Descriptions Pin No.
Pin Name SC-70 SOT-23 VOUT 3 2 Type Analog Output Function Temperature Sense.
Analog output voltage indicating temperature.
VOUT = 1863.
9 – 11.
77 T(°C) mV Supply Voltage.
2.
4 to 6.
0V Ground.
VDD GND 4 2, 5 1 3 Power Power 2 REV.
1.
0.
6 1/9/03 PRODUCT SPECIFICATION FM20 Absolute Maximum Ratings1 Parameter Supply Voltage Output Voltage Output Current Storage Temperature Range Lead Soldering Temperature ESD2 Human Body Model Machine Model Min.
Typ.
Max.
+7 VDD + 0.
5 -20/+1 +150 220 2000 250 Units V V µA °C °C V V -60 Notes: 1.
Absolute maximum ratings are limits beyond which operation may cause pe...

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