AS

“АLFA RPAR”

Joint Stock Company ALFA

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

2018 v.5

1

AS3310

AS3310 - ADSR Voltage Controlled Envelope Generator

FEATURES

APPLICATIONS

 Large Time Control Range: 100,000:1

 Full ADSR Response

 True RC Envelope Shape

 Exceptionally Low Control Voltage Feedthrough: 90µVmax

 Accurate Exponential Time Control Scales

 Isolated Control Inputs

 Good Repeatability and Tracking Between Units Without

External Trim

 Independent Gate and Trigger

 Wide power supply range:

negative rail: -15V

÷ -9V (via external resistor)

positive rail: +11

V ÷ +15V

for electronic music

AS3310

AS3310D

РDIP-16 (300 Mil)

SOIC-16 (150 Mil)

General Description

The AS3310 is a self-contained, precision ADSR type of envelope generator intended for electronic music and other

sound generation applications. Attack, decay and release times are exponentially voltage controllable over a wide range, and

the sustain level is linearly voltage controllable from 0 to 100% of the peak voltage Vp. All four control Inputs are Isolated from

the rest of the circuitry so that the control pins of tracking units may be simply tied together.

On the negative power output, there is an internal Zener diode at 7.4 volts ± 10%, which allows the chip to supply a

minimum negative supply voltage of -5 volts.. A series current limiting resistor must be added between pin 6 and the supply. Its

value is calculated as follows:

Pin Information

Circuit Block and Connection Diagram

РDIP-16,

SOIC-16

Pin No

Pin

Name

Description

1

Cap

Capacitor

2

Env Out

Output

3

Attack Peak Input

4

Gate

Gate Input

5

Trig

Trigger Input

6

Negative supply

7

Power

GND

Power Ground

8

Ccomp

Compensation

9

Sustain Level

Control Input

10

Input Current

11

Positive supply

12

Decay Control

Input

13

Release Control

Input

14

GND

Ground

15

Attack Control

Input

16

Atk Out

Attack Output

.

CM1

V+

AtkOut

16

15

GND

14

13

12

11

10

V+

+15V

9

CM2

V+

Q1

Q2

Q3

Q4 Q5

Q6 Q7

+

+

-

-

V-

7.4V

5

4K

3K

Trig

Trigger Input

Release

Input*

Input*

Decay

Control

Attack Control

Control Input**

Sustain Level

Control Input*

10K

30K

10K

Buffer

Output

1.3K

1

2

+ -

R

S

Q

Q

7

6

8

Ccomp

Power GND

10nF

470



Cap

- 15V

39nF

EnvOut

Gate

Gate

Input

10K

3nF

10K

750



470



470



.

7.4V

V+

3

4

Input and Output Waveforms

Trigger

Gate

Output

Q1 Disabled

V =5V

P

0V

0V

0V

.

.

***

* Zero to -5V Varies the Times

from 2mS to 20S

**Zero to +5V Varies the Sustain

Level from 0 to 100%

***Q1 Disabled if only a gate is applied with

no trigger