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參數(shù)資料
| 型號： | BA7780 |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | Stereo zoom microphone amplifier for camcorders |
| 中文描述： | 立體聲變焦攝像機麥克風(fēng)放大器 |
| 文件頁數(shù)： | 10/10頁 |
| 文件大?。?/td> | 144K |
| 代理商： | BA7780 |
Operation notes
Points to note regarding zoom operation
When using a microprocessor to vary the voltages on pins 29 and
30 after presetting the electronic volume sensitivity and control volt-
age range, and with the pin 27 and 28 voltage fixed at a certain
level, it is possible to minimize drift in the zoom characteristics due
to tempreature fluctuations and differences between individual ICs
by setting the pin 27 and 28 voltages using resistive voltage divider
circuits connected to the pin 4 regulator voltage output.
10
Video ICs
BA7780KV
Electrical characteristic curves
1
Z
(
29, 30pin CONTROL VOLTAGE: V
CTL
(V)
– 20
0.1
– 15
– 10
– 5
0
0.6
1.1
1.6
2.1
28pin
1.64V
1.84V
1.94V
2.04V
28pin
1.64V
1.84V
1.94V
2.04V
Ta = 25
°
C
12
→
13, 37
→
36pin
52
→
13, 52
→
36pin
0
2.2
Fig. 4 Zoom control slope variation
characteristics
4
27
28
Fig. 3
1
Z
29, 30pin CONTROL VOLTAGE: V
CTL
(
V
)
– 20
0.1
– 15
– 10
– 5
0
0.6
1.1
1.6
2.1
27pin
1.67V
1.87V
1.67V
Ta = 25
°
C
12
→
13, 37
→
36pin
52
→
13, 52
→
36pin
2.07V
1.87V
27pin
1.67V
0
2.2
Fig. 5 Zoom control position variation
characteristics
External dimensions (Units: mm)
VQFP64
48
33
32
17
16
1
49
64
10.0
±
0.2
12.0
±
0.3
1
±
1
±
0.2
±
0.1
0.5
0.125
±
0.1
0
0
1
±
0.10
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BA7780KV | 制造商:ROHM 制造商全稱:Rohm 功能描述:Stereo zoom microphone amplifier for camcorders |
| BA7781 | 制造商:ROHM 制造商全稱:Rohm 功能描述:Stereo microphone amplifier for camcorders |
| BA7781K | 制造商:ROHM 制造商全稱:Rohm 功能描述:Stereo microphone amplifier for camcorders |
| BA7785 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| BA7785FS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Triple Audio Amplifier |
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