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| 型号： | SI1120-A-GM |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 7/20页 |
| 文件大小： | 0K |
| 描述： | IC PROXIMITY/AMBIENT SEN 8ODFN |
| 标准包装： | 1 |
| 检测距离： | 19.7"（50cm）1.6' |
| 传感器类型： | 红外线 |
| 物体感测： | 非金属 |
| 响应频率： | 250Hz |
| 主体材料： | * |
| 屏蔽： | 无屏蔽 |
| 电源电压： | 2.2 V ~ 3.7 V |
| 输出类型： | PWM |
| 端子类型： | PC 引脚 |
| 封装/外壳： | * |
Si1120
2.2. Mode Selection
The Si1120 features a shutdown mode, three proximity-detection modes, three ambient-light sensing modes, and
an offset calibration for high-sensitivity mode. Mode selection is accomplished through the sequencing of the SC
(shutdown/clock), MD (mode), and STX (strobe/transmit) pins.
The part enters shutdown mode unconditionally when SC is high. Each of the MD and STX inputs should be set to
a valid high or low state. In shutdown mode, the PRX output is tri-stated, and the power-supply and TXO output
leakage currents are negligible.
The active modes are set by clocking the state of MD and STX on the falling edge of SC and then setting MD to the
required state. Since setting SC high forces shutdown, SC must be held low for the selected mode to remain
active. The timing diagram in Figure 2 illustrates the programming sequence. Table 4 indicates the various mode
encodings. After the correct state has been programmed, the STX input is used to trigger measurements.
Figure 2. Si1120 Mode Programming Timing Diagram
Table 4. Mode Control Table
Mode
Description
STX (Latch) MD (Latch)
MD (Static)
PRX400
OFC
PRX50
PRX50H
VIRL
VAMB
VIRH
Proximity, 400 mA LED current (Mode 0)
Offset calibration for high sensitivity (Mode 1)
Proximity, 50 mA LED current (Mode 2)
Proximity, 50 mA LED current, high reflectance (Mode 3)
Visible and infrared ambient, low range (Mode 4)
Visible ambient (Mode 5)
Visible and infrared ambient, high range (Mode 6)
0
0
0
0
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
(Reserved) Reserved mode
1
1
1
If the mode must be changed, the SC pin may need to be rearmed (set high), in which case the shutdown mode is
set and a power-on latency of about 500 μs is incurred upon enabling of the selected mode when SC goes back
low. Following a mode change, STX must be kept low during the power-up latency period. If the host sets STX too
early, the Si1120 may not begin a measurement cycle; PRX does not assert. If this occurs, the host can restart a
measurement by toggling STX.
Rev. 1.0
7
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相关代理商/技术参数 |
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|---|---|
| SI1120-A-GMR | 功能描述:近程传感器 Proximity/Ambient Light Snsr w/PWM Out RoHS:否 制造商:Vishay Semiconductors 感应方式:Optical 感应距离:1 mm to 200 mm 电源电压:2.5 V to 3.6 V 安装风格:SMD/SMT 输出配置:Digital 最大工作温度:+ 85 C 最小工作温度:- 25 C 系列:VCNL3020 |
| SI1120EK | 功能描述:光学传感器开发工具 Si1120 Eval Kit RoHS:否 制造商:ams 工具用于评估: 接口类型: 最大工作温度: |
| SI1120-EK | 制造商:Silicon Laboratories Inc 功能描述: |
| SI1125QR | 制造商:Thomas & Betts 功能描述:SPLICE AUTO SEIZE |
| Si1132-A10-GMR | 制造商:Silicon Laboratories Inc 功能描述:SENSOR DGTL UV INDEX QFN 制造商:Silicon Laboratories Inc 功能描述:I2C UV Index Ambient Light Sensor |
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