BA7760F ROHM Electronics, BA7760F Datasheet - Page 4

• Manufacturer Part Number: BA7760F
• Manufacturer: ROHM Electronics

•
•
The BA7760 and BA7760F are dual microphone ampli-
fiers. The audio signals from the microphones are input
to pins 3 and 12. The gain at this time is determined by
attached resistors R3 / R4 and R6 / R7. By attaching
capacitors to pins 5 and 10, the microphone amplifiers
can be given frequency characteristics like those
shown below.
(Note: The attached component numbers are those used in “Application
Example.”)
4
Multimedia ICs
Measurement circuit
Circuit operation (Refer to “Application Example”)
470 F
47 F
+
+
5k
220
2.2k
10k
10 F
4.7 F
+
10
11
12
13
14
8
9
–
+
BA7760 / F
Fig. 2
MIX BF
+
–
+
–
– 20dB
60dB
40dB
20dB
0dB
1kHz 10kHz 100kHz 1MHz 10MHz 100MHz
7
6
5
4
3
2
1
Characteristics when using standard
components and standard constants
Fig. 3 Microphone amplifier
+
+
+
4.7 F
3 6 1
4.7 F
22 F
FREQUENCY : f (Hz)
frequency characteristics
2.2k
2.2k
3
BA7760 / BA7760F
220
6
1
5k
3
6
1
470 F
+
+
47 F
3
6
1
3
6
1
– 180
180
0