Data Sheet

AD5290

Rev. C | Page 19 of 20

R1

100k

Ω

R2

200

Ω

5V

V+

V–

AD8541

5V

U6

R3

100k

Ω

R4

90k

Ω

R5

10k

Ω

C1

1

µF

CS

CLK

SDI

V+

V–

AD5290

100k

Ω

+15V

–15V

C3

0.1

µF

C2

0.1

µF

A

B

W

GND

SDI

CLK

CS

U1

V+

V+

V–

V–

ADCM371

ADCM371

+15V

–15V

+5V

+5V

U3

U2

U5

U4A

U4B

1

6

2

4

5

7408

7408

Figure 35. Audio Volume Control with Zipper Noise Reduction

CHANNEL 1

FREQ = 20.25kHz

1.03V p-p

1

2

Figure 36. Input (Trace 1) and Output (Trace 2) of the Circuit in Figure 35

(The Command of Volume Change May Occur at Any Time, but the Level Change Occurs Only Near the Zero-Crossing Window)