4

4522FS–DVD–11/05

T0806

Figure 2-2.

Pinning QFN16

Table 2-2.

Pin Description QFN16

Pin

Symbol

Type

Function

1

I3

Analog

Input current, bias voltage approximately GND

2

RF

Analog

External resistor to GND sets oscillator frequency

3

NE2

Digital

Digital control of channel 2 (low active)

4

NE3

Digital

Digital control of channel 3 (low active)

5

ENABLE

Digital

Enables output current (high active)

6

ENOSC

Digital

Enables RF oscillator (high active)

7

VCC2

Supply

+5V power supply for IOUT

8

SELA

Digital

High: selects IOUTA, RSA

Low: selects IOUTB, RSB

9

IOUTB

Analog

Output current source B for laser diode

10

RSB

Analog

External resistor to GND sets swing of oscillator B

11

RSA

Analog

External resistor to GND sets swing of oscillator A

12

GND

Supply

Ground

13

IOUTA

Analog

Output current source A for laser diode

14

VCC1

Supply

+5V power supply for IOUT and circuit

15

IR

Analog

Input current, bias voltage approximately GND

16

I2

Analog

Input current, bias voltage approximately GND

Paddle

GND

Supply

Ground

I3

RF

NE2

NE3

GND

RSA

RSB

IOUTB

16 15 14 13

5 6 7 8

1

2

3

4

12

11

10

9