參數(shù)資料
型號(hào)： BA7780
廠(chǎng)商： Rohm CO.,LTD.
英文描述： Stereo zoom microphone amplifier for camcorders
中文描述： 立體聲變焦攝像機(jī)麥克風(fēng)放大器
文件頁(yè)數(shù)： 5/10頁(yè)
文件大?。?/td> 144K
代理商： BA7780
5
Video ICs
Electrical characteristics
Measurement conditions
Unless otherwise noted, the following conditions apply:
Ta = 25°C, V
CC
3.3V, external supply voltage (pin 24) =
4.75V, pin 19 = “H” or open, pin 26 = 1 / 2V
CC
, pin 51 =
0.58
×
pin 4, pin 27 = 0.733
×
pin 4, pin 28 = 0.80
×
pin 4,
pin 29 = 2.2V, pin 30 = 2.2V
BA7780KV
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
I
qE
—
8.5
12.0
mA
GV
E
27.0
28.0
29.0
dB
GV
IH
21.5
24.5
27.5
dB
GV
IM
18.5
21.5
24.5
dB
GV
IL
16.5
18.5
21.5
dB
THD
W
—
0.05
0.5
%
THD
E
—
0.1
0.25
%
THD
Z
—
0.15
0.5
%
V
OM
0.75
0.95
—
V
rms
V
ONE
—
30
60
μ
V
rms
V
ONW
—
30
60
μ
V
rms
V
ONZ
—
60
120
μ
V
rms
CT
IE
—
– 76
– 70
dB
CT
CH
—
– 76
– 70
dB
GV
GLR
– 1.5
0.0
1.5
dB
10 39
GV
ILR
– 1.5
0.0
1.5
dB
9 40
V
REG
2.3
2.5
2.75
V
V
EXT
4.3
4.5
—
V
I
LTD
—
—
30
mA
V
HSWH
1.6
—
V
V
HSWL
0
—
0.7
V
V
HGH
2.8
—
V
V
HGM
1.3
—
2.0
V
V
HGL
0
—
0.5
V
V
HHPFH
2.0
—
V
V
HHPFL
0
—
0.5
V
GV
M1-1
– 7.0
– 6.0
– 5.0
dB
GV
M1-2
– 1.0
0
1.0
dB
GV
M2-1
6.0
7.0
8.0
dB
GV
M2-2
– 1.0
0
1.0
dB
EXT MIC IN, V
O
= 300mV
rms
Note 1
Note 2
V
CC
V
CC
V
CC
GAIN CTL H
INT MIC IN, R
g
= 1k
1
INT MIC IN, ZOOM, V
O
= 300mV
rms
INT / EXT MIC IN, THD = 1%
2
EXT MIC IN, R
g
= 1k
1
INT MIC IN, R
g
= 1k
1
INT MIC IN, WIDE, Vo = 300mV
rms
INT MIC IN, GAIN CTL L
INT MIC IN, GAIN CTL M
INT MIC IN, GAIN CTL H
EXT MIC IN
INT / EXT MIC IN, No input
Pins 29 and 30 = 0V, GAIN CTL H
INT MIC IN, HML,
INT MIC IN, HML,
HPF OFF, 19pin DC
HPF ON, 19pin DC
63
→
62 / 50
→
62 pin
INT L / M / H, 2
→
57, 47
→
57pin
Current dissipation
Voltage gain 1
Voltage gain 2
Voltage gain 3
Voltage gain 4
Distortion 1
Distortion 2
Distortion 3
Maximum output
Output noise voltage 1 (EXT)
Output noise voltage 2 (INT, WIDE)
Output noise voltage 3 (INT, ZOOM)
Input switch crosstalk (INT to EXT)
Interchannel crosstalk
GC OUT L / R gain differential
Inverter OUT L / R gain differential
Internal microphone power supply output voltage
External power supply output voltage
External power supply limit current
Input switching CTL holding voltage
Gain switching CTL holding voltage
HPF, CTL holding voltage
MIX 1 gain
MIX 2 gain
Pins 4 and 45 output current for 30k
load
Pin 25 DC for pin 25 output current of 25mA
Pin 25 output current when grounded
“H” level, pin 6 / 43 DC
“L” level, pin 6 / 43 DC
“H” level, pin 26 DC
“M” level, pin 26 DC
“L” level, pin 26 DC
Gain differential for pins 63 to 62 and 50 to 62
Gain differential for pins 2 to 57 and 47 to 57
Input signal level Int = – 31.5dBV
Ext = – 38.5dBV
Sub = – 33.5dBV (1kHz)
Monitoring pins: 17 and 32
1 JIS–A filter used
2 400Hz to 30kHz filter used
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