參數(shù)資料
型號(hào)： AT77C101B-CB02C
英文描述： Signal Conditioner
中文描述： 信號(hào)調(diào)理
文件頁(yè)數(shù)： 16/23頁(yè)
文件大?。?/td> 415K
代理商： AT77C101B-CB02C
16
AT77C101B
2150A
–
BIOM
–
02/02
Thermometer
The dummy bytes DB3 and DB4 contain some internal and temperature information.
The even nibble nnnn in DB3 can be used to measure an increase (or decrease) of the
chip temperature, using the difference between two measures of the same physical
device. The following table gives values in Kelvin.
For code 0 and 15, the absolute value is a minimum (saturation).
When the image contrast becomes low because of a low temperature difference
between the finger and the sensor, it is recommended to use the temperature stabiliza-
tion circuitry to increase the temperature of two codes (i.e. from 8 to 10), to get at least
an increase >1.4 Kelvin of the sensor. This enables to recover enough contrast to get a
proper fingerprint for recognition purpose.
nnnn
Decimal
nnnn
Binary
Temperature differential with code 8
in Kelvin
15
1111
11.2
14
1110
8.4
13
1101
7
12
1100
5.6
11
1011
4.2
10
1010
2.8
9
1001
1.4
8
1000
0
7
0111
-1.4
6
0110
-2.8
5
0101
-4.2
4
0100
-5.6
3
0011
-7
2
0010
-8.4
1
0001
-11.2
0
0000
< -16.8
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT77C102B 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Thermal Fingerprint Sensor with 0.4 mm x 14 mm (0.02 x 0.55) Sensing Area and Digital Output (On-chip ADC)
AT77C102B_07 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Thermal Fingerprint Sensor with 0.4 mm x 14 mm (0.02" x 0.55") Sensing Area and Digital Output (On-chip ADC)
AT77C102B-CB01YV 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Thermal Fingerprint Sensor with 0.4 mm x 14 mm (0.02" x 0.55") Sensing Area and Digital Output (On-chip ADC)
AT77C102B-CB01YV- 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Thermal Fingerprint Sensor with 0.4 mm x 14 mm (0.02 x 0.55) Sensing Area and Digital Output (On-chip ADC)
AT77C102B-CB02YV 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Thermal Fingerprint Sensor with 0.4 mm x 14 mm (0.02" x 0.55") Sensing Area and Digital Output (On-chip ADC)
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