Si1102-A-GMR Silicon Laboratories Inc, Si1102-A-GMR Datasheet - Page 12

• Manufacturer Part Number: Si1102-A-GMR
• Description: Proximity Sensors Optical Proximity Detector
• Manufacturer: Silicon Laboratories Inc
• Series: -r

Specifications of Si1102-A-GMR

• Maximum Operating Temperature: + 85 C
• Supply Voltage: 5.25 V
• Supply Current: 10 uA
• Operating Supply Voltage: 2 V to 5.5 V
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 25 C
• Maximum Output Current: 100 mA
• Featured Product: QuickSenseâ„¢ Portfolio
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1826 - BOARD EVAL FOR SI1102

Si 1102
4. Pin Descriptions—Si1102
12
Pin
1
2
3
4
5
6
7
8
Name
TXGD
SREN
PRX
TXO
VDD
VSS
NC
FR
Ground
Ground
Output
Output
Type
Input
Input
Input
Proximity Output .
TXGD .
Transmit ground (includes PRX return and other digital signals).
Must be connected to VSS.
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
Do not connect.
Power Supply .
Sensitivity Resistor/ENable .
Frequency Resistor .
frequency is typically 7 Hz, maximum 30 Hz. The voltage on FR relative to
ground is only about 30 mV.
VSS .
Ground (analog ground).
Normally high; goes low when proximity is detected. When device is not
enabled, the PRX pulls-up to V
causing latchup problems.
2 to 5.25 V voltage source
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
is in shutdown.
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
Figure 11. Pin Configuration
TXGD
Table 5. Pin Descriptions
PRX
TXO
NC
1
2
3
4
Rev. 1.0
DD
8
7
6
5
supply is at 0 V without either drawing current or
VSS
FR
SREN
VDD
DD
Description
.
DD
, FR = 0), part