AS

“АLFA RPAR”

Joint Stock Company ALFA

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

2018 v.2

1

AS13704

AS13704D Quad Operational Transconductance Amplifiers (OTA)

with linearizing diodes

Features

Applications

AS13704 D

•g

•excellent gm linearity

•excellent matching between

amplifiers

•linearizing diodes for reduced output

distortion

•high output SNR

•LM13700 functional replacement

(without output buffers)

•current-controlled amplifiers

•stereo audio amplifiers

•current-controlled impedances

•current-controlled filters

•current-controlled oscillators

•multiplexers

•timers

•S&H circuits

1

12

24

SSOP24 , 150mil, 0.635 mm

General Description

The AS13704D consists of four current-controlled transconductance amplifiers OTA, each with differential inputs

and a push-pull output. All amplifiers share common supplies, but operate independently. Linearizing diodes are

provided at the inputs to reduce distortion and allow higher input levels. The result is a 10-dB signal-to-noise

improvement referenced to 0.5 percent THD.

PART NUMBER

PACKAGE

BODY SIZE (NOM)

AS13704D

SSOP 24

150 mil, 0.635 mm pitch

Connection Diagram

2

1

3

4

5

6

7

12

11

10

9

8

DIODE

BIAS4

DIODE

BIAS2

DIODE

BIAS1

DIODE

BIAS3

AMP

BIAS

INPUT1

AMP

BIAS

INPUT3

AMP

BIAS

INPUT4

AMP

BIAS

INPUT2

23

24

22 21 20 19 18

13

14

15

16

17

+IN1 -IN1

OUT1

OUT2

+IN2

-IN2

+IN3

-IN3

+IN4

OUT4

-IN4

-Vs

NC

OUT3

NC

+Vs

-

-

+

+

-

+

-

+

Pin Functions

Pin

Description

Name

Number

Amp bias input 1,2,3,4

1, 12, 13, 24

Current bias input

Diode bias 1,2,3,4

2, 11, 14, 23

Linearizing diode bias input

+IN 1,2,3,4

3, 10, 15, 22

Positive input

- IN 1,2,3,4

4, 9, 16, 21

Negative input

Output 1,2,3,4

5, 8, 17, 20

Output

+Vs

19

Positive power supply

-Vs

6

Negative power supply

NC

7, 18

Not connected