m65845afp Renesas Electronics Corporation., m65845afp Datasheet - Page 7

• Manufacturer Part Number: m65845afp
• Description: Digital Echo With Microphone Mixing Circuit
• Manufacturer: Renesas Electronics Corporation.

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