- 您现在的位置：买卖IC网 > PDF目录68996 > FTF1100MF1 (INFINEON TECHNOLOGIES AG) SPECIALTY ANALOG CIRCUIT, XMA PDF资料下载
参数资料
| 型号： | FTF1100MF1 |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, XMA |
| 文件页数： | 2/39页 |
| 文件大小： | 400K |
| 代理商： | FTF1100MF1 |
第1页当前第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页
FingerTIP
Infineon Technologies
10/38
FTF 1100 MF1 V2.0 databook 3.3 (05.00)
Figure 4: The Corresponding Sum-Histogram
The maximum obtainable local contrast is determined by the maximum difference between
the gray levels of finger valleys (air) and finger ridges (skin moisture). This local contrast is
called dynamics.
An alternative representation of the gray levels is the so-called sum-histogram, which is
generated from the fingerprint histogram (shown in figure 3) by integration over all gray
levels. A diagram of the sum-histogram is shown in figure 4.
The so-called water line appears when the sensor surface is covered with water. If the
surface is in contact with air, the air line appears. A typical fingerprint will be somewhere
between these two characteristic lines and is illustrated in figure 4.
The dynamics of the sensor depends on the internal reference voltage Vref (figure 2). Two
values of Vref are selectable to allow the sensor to be adapted to different requirements.
Table 1 shows the number of usable gray levels. The procedure to change the dynamics
is shown in section 3.6 for EPP mode and section 4.41 for SPI mode.
High dynamics
Low dynamics
Supply voltage VCC
Vref
usable gray levels
Vref
usable gray levels
5.0 V
3.6 V
approx. 70
2.5 V
approx. 40
Table 1: Reference Voltages and the Resulting Values for Dynamics
typic
al fing
erprin
t
"air line”
(sensor surface
in contact with air)
gray level
Sum of
frequencies
of occurrence
255
0
"water line”
(sensor surface
covered with water)
water
(finger ridge)
air
(finger valley)
相关PDF资料 |
PDF描述 |
|---|---|
| FW100H9 | 1-OUTPUT 100 W DC-DC REG PWR SUPPLY MODULE |
| FW050H9 | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| FW150H | 1-OUTPUT 150 W DC-DC REG PWR SUPPLY MODULE |
| FW050H | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| FW100H | 1-OUTPUT 100 W DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FTF1100MF1V2.0 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| FTF1100MF1V2.1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| FTF3020-C | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Full Frame CCD Image Sensor |
| FTF3020-C/EG | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Full Frame CCD Image Sensor |
| FTF3020-C/HG | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Full Frame CCD Image Sensor |
发布紧急采购，3分钟左右您将得到回复。