BA7631F 查看數據表（PDF） - ROHM Semiconductor
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BA7631F Datasheet PDF : 7 Pages
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Multimedia ICs
BA7631 / BA7631F
•Electrical characteristics (unless otherwise noted, Ta = 25°C and VCC = 12V)
Parameter
Symbol Min. Typ. Max. Unit
Recommended operating voltage
VCC
4.5
12.0 13.0
V
Circuit current
ICC
—
14.9 24.0
mA
Maximum output level
Vom
3.1
3.6
—
Vrms
Voltage gain
GV
– 0.5
0
0.5
dB
Total harmonic distortion
THD
—
0.005 0.1
%
Interchannel crosstalk
Input conversion noise voltage
CTM
VMin.
— – 75 – 60
dB
—
20.0
40.0
µVrms
CTL switch level
VTH
1.0
2.0
3.0
V
Input impedance
ZIN
48.5
65
80.5
kΩ
᭺Not designed for radiation resistance.
Conditions
—
—
f = 1MHz, THD = 0.5%
f = 1kHz, VIN = 3.0dBm
f = 1kHz, VIN = 3.0dBm
f = 10kHz, VIN = 3.0dBm
30kHz LPF, Rg = 2.2kΩ
—
—
•Circuit operation
The BA7631 and BA7631F make it easy to construct a decoder for the scrambled pay channels. They have been
designed specifically for audio signal decoding. As shown in the application examples in Figs. 1 and 2, there are
inputs for TV, VCR, decoder, and AUX, to cover a wide range of applications. When the AUX input is not used, by
setting CTL5 to “L”, the system construction becomes the same as that of the BA7630S, and the BA7630S switching
logic can be used as is.
•Application example
To VTR IN
22µF
+
1
CTL4 for SW3
2
22µF
+
from EXT OUT
3
VCC
47µ+
4
22µF
from VTR OUT
+
5
from VTR
TUNER OUT
CTL1 for SW1
6
22µF
+
7
8
BF
SW1
BF
1
2
3 SW2
4
1
BF
2
3
4
5
1
2 SW3
22µF
+
16
To DECODER IN
15
CTL5 for SW2
14
CTL3 for SW2
13
To TV IN
12
22µF
+
11
CTL2 for SW1
from TV OUT
10
9
+
22µF
from
DECODER OUT
Fig.1
5
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