MAXDATA Belinea 101920, Service Manual

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ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
e
N
Total Output Noise f = 20Hz to 22KHz
Play, max volume 500 800
µ
V
f = 20Hz to 22KHz
Play, max attenuation 100 250
µ
V
f = 20Hz to 22KHz
Mute 60 150
µ
V
SR Slew Rate 5 8 V/
µ
s
R
i
Input Resistance 22.5 30 K
Ω
R
Var Out
Variable Output Resistance 30 100
Ω
R
load Var Out
Variable Output Load 2 K
Ω
SVR Supply Voltage Rejection f = 1kHz; max volume
C
SVR
= 470
µ
F; V
RIP
= 1V
rms
35 39 dB
f = 1kHz; max attenuation
C
SVR
= 470
µ
F; V
RIP
=1V
rms
55 65 dB
T
M
Thermal Muting 150 C
T
s
Thermal Shut-down 160 C
MUTE STAND-BY & INPUT SELECTION FUNCTIONS
V
ST ON
Stand-by ON Threshold 3.5 V
V
ST OFF
Stand-by OFF Threshold 1.5 V
V
M ON
Mute ON Threshold 3.5 V
V
M OFF
Mute OFF Threshold 1.5 V
I
qST-BY
Quiescent Current @ Stand-by 0.6 1 mA
A
MUTE
Mute Attenuation 50 65 dB
I
stbyBIAS
Stand-by bias current Stand by on V
ST-BY
= 5V
V
MUTE
= 5V
80
µ
A
µ
A
Play or Mute -20 -5
µ
A
I
muteBIAS
Mute bias current Mute 1 5
µ
A
Play 0.2 2
µ
A
APPLICATION SUGGESTIONS
The recommended values of the external components are those shown on the application circuit of fig-
ure 1A. Different values can be used, the following table can help the designer.
COMPONENT
SUGGESTION
VALUE
PURPOSE
LARGER THAN
SUGGESTION
SMALLER THAN
SUGGESTION
R1 300K Volume control
circuit Larger volume regulation
time Smaller volume regulation
time
R2 10K Mute time constant Larger mute on/off time Smaller mute on/off time
P1 50K Volume control
circuit
C1 1000
µ
F Supply voltage
bypass Danger of oscillation
C2 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C3 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C4 470
µ
F Ripple rejection Better SVR Worse SVR
C5 100nF Volume control time
costant Larger volume regulation
time Smaller volume regulation
time
C6 1000
µ
F Output DC
decoupling Lower low frequency cutoff Higher low frequency cutoff
C7 1
µ
F Mute time costant Larger mute on/off time Smaller mute on/off time
C8 1000
µ
F Output DC
decoupling Lower low frequency cutoff Higher low frequency cutoff
C9 100nF Supply voltage
bypass Danger of oscillation
O
O