M65845AFP 参数 Datasheet PDF下载

M65845AFP

ALC Level Block Diagram

Vo (dBV)

10

ALC supply voltage control limits

+3

0

–10

–20

It is set 47 dB for microphone amplifier gain.

–30

–60

–50

–40

–30

Vi (dBV)

–20

–10

ALC Operation Voltage Control

ALC operation voltage can be formed within the limits of –10 to +3 dBV controlled by DC control voltage which

connect pin 35.

(Setting up forms)

2.5 V (

1

V )

2

CC

internal direct bias

half peak

voltage Vpo

35 pin control voltage V

ALC

0V

V

ALC

=

1

V – Vpo

2

CC

When ALC operation voltage is –5 dBV (at V

CC

= 5 V)

–5 dBV = 0.56 Vrms = 1.59 Vp-p = 0.80 Vp-o

V

ALC

= 2.5 – 0.8 = 1.7 V

are concerned.

REJ03F0170-0201 Rev.2.01 Jan 25, 2008

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