CXA2546Q データシートの表示（PDF） - Sony Semiconductor

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CXA2546Q

3-band Electronic Volume

Sony Semiconductor 

Description of Operation

(1) Input amplifier gain

CXA2546Q

Rext

39 IN14

40 IN13

41 IN12

42 IN11

VCT

36 GAIN134

37 GAIN12

38 GAIN11

Rint

INAO1

33

Rint is included in this IC, (22kΩ)

Gain=1+

Rint

Rext

No Rext → 0 dB

(2) LOUD

The loudness function achieves the necessary frequency response by using a filter as shown below. The

resistors are built in this IC so that fL and fH can be set by selecting C1 and C2.

3 LDHC1

4 LDHC2

R2=24.05k

fL=1/ (2πC1R1)

fH=1/ (2πC2R2)

C2

38.8k

fH

13.02k

32 VRIN1

R1=1.08k

5 VRIN2 CXA2546Q

VCT

fL

C1

VCT

3 LDLC1

5 LDLC2

—15—

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