- 您现在的位置：买卖IC网 > Sheet目录507 > SI1120-A-GM (Silicon Laboratories Inc)IC PROXIMITY/AMBIENT SEN 8ODFN
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
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
SI1141-A10-GM
IC SENSOR IR PROX/AMBIENT 10-QFN
SI1143-A10-GMR
SENS IR PROXIMITY AMB LT 10QFN
SI1300BDL-T1-GE3
MOSFET N-CH D-S 20V SC-70-3
SI1302DL-T1-GE3
MOSFET N-CH D-S 30V SC-70-3
SI1303DL-T1-GE3
MOSFET P-CH 20V 670MA SOT323-3
SI1305DL-T1-GE3
MOSFET P-CH G-S 8V SC-70-3
SI1307EDL-T1-GE3
MOSFET P-CH G-S 12V SC-70-3
SI1401EDH-T1-GE3
MOSFET P-CH F-D 12V SC-70-6
相关代理商/技术参数
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
SI1133-AA00-GMR
功能描述:Optical Sensor Ambient 625nm, 525nm, 460nm I2C 10-WFQFN 制造商:silicon labs 系列:- 包装:剪切带（CT） 零件状态:有效 类型:环境 波长:625nm，525nm，460nm 接近探测:无 输出类型:I2C 电压 - 电源:1.62 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-WFQFN 供应商器件封装:10-DFN（2x2） 标准包装:1
SI1140DK
功能描述:位置传感器开发工具 EVAL BRD SI1143-A10-GM
RoHS:否 制造商:Microchip Technology 工具用于评估: 接口类型: 工作电压:
SI1141
制造商:SILABS 制造商全称:SILABS 功能描述:PROXIMITY/AMBIENT LIGHT SENSOR IC WITH I2C INTERFACE