SM7153 データシートの表示（PDF） - Samhop Mircroelectronics

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SM7153

ELECTRONIC VOLUME CONTROLLER

Samhop Mircroelectronics 

三合微科股份有限公司

SM7153

SAMHOP Microelectronics Corp. ELECTRONIC VOLUME

CONTROLLER

(3) Attenuator

The attenuator unit consist of diffused resistors and analog switches. Attenuator 1

attenuates 0~60dB at 10dB/step while Attenuator 2 attenuates 2~8dB at 2dB/step, a total

of 0~66dB at 2dB/step.

0dB BUFFER

IN1

AMP

0

OUT1

IN2

OUT2

-10

-2

-20

-4

-30

R1

-40

-6

R2

-8

A-GND

-50

-60

ATTENUATOR 1

R1=50kΩ(Typ.)

R2=20kΩ(Typ.)

Figure 4

00

ATTENUATOR 2

If there is the possibility for excessive voltage being to the attenuator, it is recommended to

insert a protective diode as illustrated below.

VDD

VDD

IN

Vss

Vss

Figure 5

Page 5

V.1.0

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