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參數(shù)資料
| 型號： | FCD4B14 |
| 廠商： | Atmel Corp. |
| 英文描述： | Thermal Fingerprint Sensor with 0.4 mm x 14 mm Sensing Area and Digital Output |
| 中文描述： | 熱指紋傳感器感光面積和數(shù)字輸出的0.4毫米× 14毫米 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大?。?/td> | 265K |
| 代理商： | FCD4B14 |
14
FCD4B14
1962C
–
01/02
Thermometer
The dummy bytes DB3 and DB4 contains 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 fingeprint 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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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| FCD4B14CC | 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 Sensing Area and Digital Output |
| FCD4B14CCB | 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 Sensing Area and Digital Output |
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| FCD4N60TF | 功能描述:MOSFET 600V NCH MOSFET RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風格:Through Hole 封裝 / 箱體:Max247 封裝:Tube |
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