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PDF BA7760 Data sheet ( Hoja de datos )
| Número de pieza | BA7760 | |
| Descripción | Microphone Amplifier | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Multimedia ICs
Microphone Amplifier
BA7760 / BA7760F
The BA7760 and BA7760F are dual microphone amplifiers designed for audio signal amplification. These are low
noise amplifiers with a low -122dBV (typically) equivalent input noise voltage. Each IC has an internal mixer buffer
amplifier for the mixing of signals from two channels. When used with the BA7725S or BA7725FS, the BA7726AS or
BA7726AFS and BU9252S or BU9252F, these ICs simplify the configuration of digital echo systems with two inputs
(for karaoke duets, for instance).
•Applications
Audio equipment with karaoke features, VCRs, LDs, etc.
•Features
1) Internal 2-channel low noise microphone amplifier.
2) Internal mixer buffer amplifier with mute function.
3) Available in 2 types of packages: DIP 14-pin or SOP
14-pin.
•Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Applied voltage
Power
dissipation
BA7760
BA7760F
VCC
Pd
15
600∗1
450∗2
Operating temperature
Topr
– 25 ~ + 75
Storage temperature
Tstg – 55 ~ + 125
∗1 Unmounted. Reduced by – 6.0mW for each increase in Ta of 1°C over 25°C.
∗2 Unmounted. Reduced by – 4.5mW for each increase in Ta of 1°C over 25°C.
Unit
V
mW
°C
°C
•Recommended operating conditions
Parameter
Symbol
Power supply voltage
VCC
Limits
6 ~ 14
Unit
V
1
1 page  
Multimedia ICs
Output from these dual amplifiers is level-adjusted with
an attached volume control (VR) and then input to pin
7 and mixed by the mixer buffer amplifier. The ON /
OFF operation of the mixer buffer amplifier can be con-
trolled with the signal input to pin 13 (MUTE CTRL).
For DC loads, this volume control (VR) should be set
above 4.5kΩ to assure proper performance of the IC’s
internal driver.
•Application example
BA7760 / BA7760F
Mode
MUTE
MUTE
Control signal
Operation
L Muted
H Normal operation
10kΩ
10µF
8
5kΩ
(VR)
1µF
9
10
R6
47µF
R7
220Ω
11
2.2kΩ
4.7µF
12
13
MIX BF
+
–
–+
+–
7
6
1µF
5kΩ
(VR)
5
R4
4
220Ω
47µF
4.7µF
3
2.2kΩ
2
14
BA7760 / F
Fig. 4
1
22µF
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet BA7760.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
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| BA7765AS | (BA7765AS - BA7767AS) NORMAL AUDIO SIGNAL PROCESSINGS | ROHM Semiconductor |
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