M65856 Mitsubishi, M65856 Datasheet - Page 13

• Manufacturer Part Number: M65856
• Description: DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
• Manufacturer: Mitsubishi

(6)ALC operating voltage setting
(5)ALC level diagram
ALC operating voltage can be set at a desired value between -10dBV and +3dBV by varying
the DC voltage applied to pin 3 (ALC operating voltage setting terminal).
(Setting method)
To set ALC operating voltage at -5dB(Vcc=5V)
-5dBV=0.56Vrms=1.59Vp-p=0.8Vp-o
V
Since the input impedance at pin 5
it is possible to provide ALC operating voltage by dividing resistance.
When Vcc=5V
ALC
ONE SIDE
PEAK VOLTAGE,Vpo
=2.5-0.8=1.7V
ALC operating
voltage (dBV)
-10
+3
-2
-4
-6
-8
0
Vo(dBV)
-10
-20
-30
10
+3
DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
0
-70
-60
-50 -40 -30 -20 -10
MICROPHONE AMPLIFIER GAIN SETTIG=47dB
Vi(dBV)
Voltage applied to
VOLTAGE APPLIED TO 35 PIN,VALC
pin 5 10 VALC(V)
ALC OPERATING VOLTAGE SETTING RANGE
MITSUBISHI
ELECTRIC
10 is high at 1M or more,
0.50
1.09
1.38
1.61
1.79
1.94
2.05
MITSUBISHI SOUND PROCESSOR ICs
2.5V(
INTERNAL DC BIAS
OV
M65856SP
Resistance R( )
1
2
Vcc)
VALC=
5.6k
15k
20k
24k
27k
33k
36k
3
1
2
Vcc-Vpo
R
•
51k
Vcc
0.01µ