M65845AFP 查看數據表（PDF） - Renesas Electronics
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M65845AFP Datasheet PDF : 14 Pages
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M65845AFP
ALC Level Block Diagram
Vo (dBV)
10
+3
0
ALC supply voltage control limits
–10
–20
It is set 47 dB for microphone amplifier gain.
–30
–60
–50
–40
–30
–20
–10
Vi (dBV)
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)
half peak
voltage Vpo
2.5
V
(
1
2
VCC)
internal direct bias
35 pin control voltage VALC
0V
VALC =
1
2
VCC – Vpo
When ALC operation voltage is –5 dBV (at VCC = 5 V)
–5 dBV = 0.56 Vrms = 1.59 Vp-p = 0.80 Vp-o
VALC = 2.5 – 0.8 = 1.7 V
are concerned.
REJ03F0170-0201 Rev.2.01 Jan 25, 2008
Page 7 of 13
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