參數(shù)資料
型號: FM20P3X
英文描述: Temperature Transducer/Sensor
中文描述: 溫度變送器/傳感器
文件頁數(shù): 1/9頁
文件大?。?/td> 507K
代理商: FM20P3X
1
F
www.fairchildsemi.com
FM20 Rev. A.5
FM20
Low Voltage Ultra-Low-Power
Temperature Sensor
General Description
The FM20 is a precision CMOS temperature sensor that provides
a cost-effective solution for space-constrained applications.
The output voltage ramp of the FM20 has a negative slope of
-11.77mV/
°
C. With a supply voltage of 2.4V to 6V, the FM20 is
typically accurate to
±
1
°
C at 25
°
C, to
±
3
°
C over the range of -55
°
C
to 130
°
C. Reducing the supply voltage to 2.4V does not change
the negative temperature extreme from -55
°
C, and the positive
extreme also remains at +130
°
C.
The FM20 does not require external calibration. Calibration of the
FM20 is performed at the factory.
The FM20 is available in 5-pin SC70 and 3-pin SOT-23 surface
mount packages.
Features
I
Extremely Low Power
I
Precision Calibrated to
±
1
°
C (typical) at 25
°
C
Typical Applications
June 2001
I
Temperature Range: -55
°
C to 130
°
C
I
Linear Output Ramp (-11.77mV/
°
C)
I
Output Ramp is Calibrated to Degrees Celsius
I
Low Self Heating (0.02
°
C max in still air)
I
Uses a Single Positive Supply
I
Operating Voltage Range: +2.4V to +6V
Applications
I
Cellular Telephones
I
Computers
I
Battery Management
I
FAX Machines/Printers/Copiers
I
Portable Medical Instruments
I
HVAC
I
Power Supply Modules
I
Disk Drives
I
Appliances
2001 Fairchild Semiconductor Corporation
Serial Output Temperature to Digital Converter
(The full scale of the A-to-D Converter will typically be limited to +125
°
C simply by the number of bits
available in the conversion. The FM20 would still be capable of its full output swing.)
IN
10K
100K
1
μ
F
FB
1.75V
REF
3.9K
SERIAL
DATA OUT
CLOCK
ENABLE
FM20
5V
V
Temp
Serial
Analog-to-Digital
Converter
Adjustable
Shunt Voltage
Reference
+
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