AS

“АLFA RPAR”

Joint Stock Company ALFA

Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv

2018 v.5

2

AS3340

AS3345

AS3345 Pin Information

AS3345 Circuit Block and Connection Diagram PDIP-18 (QFN-24)

РDIP-18,

Pin No

QFN-24,

Pin No

Pin

Name

Description

1

4

Scale 1

Scale Adjust 1

2

5

Scale 2

Scale Adjust 2

3

7

Negative supply

4

8

Pulse Output

5

9

PWM Control

Input

6

11

Hard

Synchronization

Input

7

12

Meander Output

8

14

High Frequency

Track

9

15

Sawtooth Output

10

16

Soft

Synchronization

Input

11

17

Triangle Output

12

19

Cap

Capacitor

13

20

GND

Ground

14

22

GND

Ground

15

23

Linear FM Input

16

24

Scale

17

2

Frequency

Control Input

18

3

Positive supply

-

1,6,10,

13,18,21

NC

Not connected

-

Power

Pad

Power

Pad

Don’t connect

(3)

+15V

17 (2)

FREQ. CNTL.

INPUTS

+15V

470



10nF

1M

TOP

VIEW

PRECISION

MULTIPLIER

+

V+

A1

10K

24K

5.6K

TEMPCO

GEN

(4)

(5)

(11)

(12)

(9)

(16)

(17)

(19)

(20)

(7)

LINEAR FM

INPUT

SOFT

SYNC.

INPUT

0V

+5V

+15V

1.5M

1M

10nF

100nF

1.8K

470



1nF

Q1

A2

- +

V+

CM

CM

-

4X

4X

1X

Q3

Q2

14.4K

1nF

-1.3V

BUF

- +

+ -

14.4K

V+

TRI.

TO

SAW

CONV.

HIGH

FREQ.

TRACK

1nF

12K

HARD

SYNC.

INPUT

P.W.M.

CNTL.

INPUT

0V

+12V

+10V

-15V

820



51K

7.4V

V-

V+

-

+

0V

B

+15V

-15V

20K

(14)

(24)

(23)

(22)

(8)

(15)

18

16

1

2

9

8

7

6

5

4

3

10

11

12

13

14

15

Output Waveforms

0V

+5V

0V

0V

+12V

+10V

NEGATIVE HARD SYNC.

POSITIVE AND NEGATIVE HARD SYNC.

POSITIVE HARD SYNC.

.

.

Absolute Maximum Ratings

Current through Any Pin

Voltage Between Frequency Control Pin or

Reference Current Pin and GND Pin

Voltage Between Multiplier Output Pin and

GND Pin

Storage Temperature Range

Operating Temperature Range

+24V, -0,5V

+18V, -0,5V

-6V, +0,5V

±40mA

±6V

+6V, -1V

- 55

°C to 150°C

- 25

°C to 75°C