SI1102-A-GM Datasheet SI1102-A-GM, SI1102-A-GMR | P1-P3

Si1102

OPTICAL PROXIMITY DETECTOR

Features

Applications

Description

The Si1102 is a high-performance (0–50 cm) active proximity detector.

Because it operates on an absolute reflectance threshold principle, it avoids

the ambiguity of motion-based proximity systems.

The Si1102 consists of a patented, high-EMI immunity, differential photodiode

and a signal-processing IC with LED driver and high-gain optical receiver.

Proximity detection is based on measurements of reflected light from a

strobed, optically-isolated LED. The standard package for the Si1102 is an 8-

pin ODFN.

Functional Block Diagram

 High-performance proximity

detector with a sensing range of up

to 50 cm

 Single-pulse sensing mode for low

system power

 Adjustable detection threshold and

strobe frequency

 Proximity (PRX) status latch

enables controlling devices to

avoid missing a detection

 High EMI immunity without

shielded packaging

 2 to 5.25 V power supply

 Operating temperature range:

–40 to +85 °C

 Typical 10 µA current consumption

and ultra-low power of 1 mA typical

 Current driven (400 mA) or

saturated LED driver output

 Small outline: 3x3 mm (ODFN)

 Proximity sensing

 Photo-interrupter

 Occupancy sensing

 Touchless switch

 Object detection

 Handsets

 Intrusion/tamper detection

Signal

processing

PRX

SREN

TXO

VSS

LED

Drive

Shutdown

control

Oscillator

VDD

Infrared

emitter

Product

Case

Hi-Lo

Threshold

Output

Reflectance-Based Proximity Detection

U.S. Patent 5,864,591

U.S. Patent 6,198,118

U.S. Patent 7,486,386

Other patents pending

Pin Assignments

VSS

TXO

TXGD

SREN

VDD

PRX

DNC

Si1102

ODFN

Si1102

2 Rev. 1.0

Si1102

Rev. 1.0 3

TABLE OF CONTENTS

Section Page

1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3. Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3.1. Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3.2. Choice of LED and LED Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

3.3. Power-Supply Transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

3.4. Mechanical and Optical Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

3.5. Typical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

4. Pin Descriptions—Si1102 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

5. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

6. Photodiode Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

7. Package Outline (8-Pin ODFN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P16

SI1102-A-GM

Mfr. #:

Buy SI1102-A-GM

Manufacturer:

Silicon Labs

Description:

Proximity Sensors Infrared proximity sensor

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

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SI1102-A-GM

SI1102-A-GM

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