AS

“АLFA RPAR”

Joint Stock Company ALFA

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

2018 v.5

1

AS3330

AS3330 - Dual Voltage Controlled Amplifier (VCA)

FEATURES

APPLICATIONS

■ two independent voltage controlled amplifiers

■ simultaneous linear and exponential control Inputs

■ wide control range: 120dB min.

■ very accurate control scales for excellent gain

tracking

■ exceptionally low control voltage feedthrough < -90dB

■ low distortion: < 0.1%

■ exceptionally low noise: < -100dB

■ operating point anywhere from Class B to Class A

■ summing nodes for signal and linear control inputs

■ current outputs for ease of use in voltage controlled

2-Pole Filters

■ can be used in VCO and VCF control paths without

causing shift

■ ±15 volt supplies

for electronic music

AS3330

AS3330F

РDIP-18 (300 mil)

QFN-24 4x4mm 0,5mm

General Description

The AS 3330 is a dual, high performance, voltage controlled amplifier intended for electronic musical instrument and

professional audio applications. Each amplifier includes complete circuitry for simultaneous linear and exponential control

of gain. In addition, the operating point of the amplifiers may be set anywhere from Class

В to Class A, allowing the user to

optimize those parameters critical to the particular application. Also featured are virtual ground summing nodes for both the

signal and linear control inputs, so that signal and control mixing may be accomplished within the device itself. VCA outputs

are signal currents, allowing the device to be conveniently used in two-pole voltage controlled filters, as well as dual

voltage controlled amplifiers.

The devices include an on-chip 7.4 volt Zener, allowing them to operate

off ±15 volt supplies as well as +15, -5 volt

supplies.

Improved protection and crosstalk level (better than -80 dB).

Power pad in QFN package highly improves thermal stability of parameters of AS3330F.

Pin Information

Circuit Block and Connection Diagram (PDIP-18)

РDIP-18

Pin No

QFN-24L

Pin No

Pin

Name

Description

1

4

Out1

Current Output 1

2

5

Gain 1

3

7

DTrim1

Distortion Trim 1

4

8

IN1

Signal Input 1

5

9

Negative supply

6

11

Exponential

Control Input 1

7

12

Linear Control

Input 1

8

14

IDLE

IDLE Adjust

9

15

Compensation 1

10

16

Positive supply

11

17

Compensation 2

12

19

Linear Control

Input 2

13

20

IN2

Signal Input 2

14

22

Exponential

Control Input 2

15

23

Gain 2

16

24

Out2

Current Output 2

17

2

DTrim2

Distortion Trim 2

18

3

GND

Ground

-

Power

pad

Power

pad

Don’t connect

1K

10

11

12

13

14

15

16

17

18

+

-

SIGNAL

OUTPUT

+15V

150K

1

2

3

150K

+15V

-

+

51K

4

5

6

7

8

9

1K

CL

5nF

1nF

10nF

SIGNAL

OUTPUT

SIGNAL

INPUT*

A

CELL

A

CELL

TOP

VIEW

BAL.

V-

LOG.CONV.

+

-

-

+

V+

5nF

10nF

1nF

+15V

LOG.CONV.

REG.

BIAS

ADJ.

EXP.

CNTL.

INPUT**

SIGNAL

INPUT*

LINEAR

CNTL.

INPUT***

EXP.

CNTL.

INPUT

LINEAR

CNTL.

INPUT

**

***

-15V

100K

* -10V<V <+10V

S

** -1V<V <+10V

C

*** 0V<V <+10V;

C

&

.

.

BAL.