High-Frequency Waveform Generator

_______________________________________________________________________________________

7

______________________________________________________________Pin Description

*

The five GND pins are not internally connected. Connect all five GND pins to a quiet ground close to the device. A ground plane is

0

-100

0

20

60

100

OUTPUT SPECTRUM, SINE WAVE

-80

-20

FREQUENCY (MHz)

40

80

-40

-60

-10

-30

-50

-70

-90

10

30

50

70

90

0

-100

0

10

30

50

OUTPUT SPECTRUM, SINE WAVE

-80

-20

FREQUENCY (kHz)

20

40

-40

-60

-10

-30

-50

-70

-90

5

15

25

35

45

____________________________Typical Operating Characteristics (continued)

otherwise noted.)

-5V supply input

V-

20

Sine, square, or triangle output

OUT

19

+5V supply input

V+

17

Digital +5V supply input. Can be left open if SYNC is not used.

DV+

16

Digital ground

DGND

15

TTL/CMOS-compatible output, referenced between DGND and DV+. Permits the internal oscillator to be

synchronized with an external signal. Leave open if unused.

SYNC

14

Current input for frequency control

IIN

10

Phase detector output. Connect to GND if phase detector is not used.

PDO

12

Phase detector reference clock input. Connect to GND if phase detector is not used.

PDI

13

External capacitor connection

COSC

5

Duty-cycle adjust input

DADJ

7

Frequency adjust input

FADJ

8

Waveform selection input; TTL/CMOS compatible

A1

4

Waveform selection input; TTL/CMOS compatible

A0

3

PIN

Ground*

GND

2, 6, 9,

11, 18

2.50V bandgap voltage reference output

REF

1

FUNCTION

NAME