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| 型号： | SI1102-A-GMR |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | SENSOR OPTICAL DETECTOR |
| 产品培训模块： | Si1102 & Si1120 |
| 特色产品： | QuickSense? Portfolio |
| 标准包装： | 1 |
| 检测距离： | 19.7"（50cm）1.6' |
| 检测方法： | 反射 |
| 物体感测： | 非金属 |
| 安装类型： | 表面贴装 |
| 电流 - 电源： | 400mA |
| 电源电压： | 2.2 V ~ 5.25 V |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 特点： | 低功率 |
| 其它名称： | 336-1819-6 |
Si11 02
4. Pin Descriptions—Si1102
PRX
TXGD
TXO
NC
1
2
3
4
8
7
6
5
VSS
FR
SREN
VDD
Figure 11. Pin Configuration
Table 5. Pin Descriptions
Pin
1
Name
PRX
Type
Output
Proximity Output .
Description
Normally high; goes low when proximity is detected. When device is not
enabled, the PRX pulls-up to V DD .
2
TXGD
Ground
TXGD .
Transmit ground (includes PRX return and other digital signals).
Must be connected to VSS.
3
TXO
Output
Transmit Output Strobe .
Normally connected to an infrared LED cathode. This output can be allowed
to saturate, and output current can be limited by the addition of a resistor in
series with the LED. It can also be connected to an independent unregulated
LED supply even if the V DD supply is at 0 V without either drawing current or
causing latchup problems.
4
NC
Do not connect.
5
VDD
Input
Power Supply .
2 to 5.25 V voltage source
6
SREN
Input
Sensitivity Resistor/ENable .
Driving SREN below 1 V or connecting resistance from SREN to VSS
enables the chip and immediately starts a proximity measurement cycle. A
potentiometer to VSS controls proximity sensitivity. R1 = 0 yields maximum
detection distance. If SREN is high and FR is low (SREN = V DD , FR = 0), part
is in shutdown.
7
FR
Input
Frequency Resistor .
A resistor to VSS controls the proximity-detection cycle frequency. With no
resistor, the sample frequency is, at most, 5.0 Hz. With FR shorted to VSS
the sample frequency is typically 250 Hz. With a 100 k ? resistor, the sample
frequency is typically 7 Hz, maximum 30 Hz. The voltage on FR relative to
ground is only about 30 mV.
8
VSS
Ground
VSS .
Ground (analog ground).
12
Rev. 1.0
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