3

ATR0807

4723CS–DVD–07/03

Pin Configuration SSO16

Figure 2. Pinning SSO16

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

IR

I2

I3

RF

NE2

NE3

ENABLE

ENOSC

VCC1

IOUTA

GND

RSA

RSB

IOUTB

SELA

VCC2

Pin Description

Pin

Symbol

Type

Function

1

IR

Analog

Input current, bias voltage approximately GND

2

I2

Analog

Input current, bias voltage approximately GND

3

I3

Analog

Input current, bias voltage approximately GND

4

RF

Analog

External resistor to GND sets frequency of oscillator

5

NE2

Digital

Digital control of channel 2 (low active)

6

NE3

Digital

Digital control of channel 3 (low active)

7

ENABLE

Digital

Enables output current (high active)

8

ENOSC

Digital

Enables RF oscillator (high active)

9

VCC2

Supply

+5 V power supply for IOUT

10

SELA

Digital

High: selects IOUTA, RSA

Low: selects IOUTB, RSB

11

IOUTB

Analog

Output current source B for laser diode

12

RSB

Analog

External resistor to GND sets swing of oscillator B

13

RSA

Analog

External resistor to GND sets swing of oscillator A

14

GND

Supply

Ground

15

IOUTA

Analog

Output current source A for laser diode

16

VCC1

Supply

+5 V power supply for IOUT and circuit