ICs for Audio Common Use
1
AN7535NSA
Headphone amplifier IC
for portable equipment
n Overview
The AN7535NSA is an audio signal processing
IC in which line amplifiers and beep circuit are built
in the headphone amplifiers for use in portable
equipment. Its headphone output block is using the
center amplifier method which eliminates the need
for coupling capacitor so that the circuit is most
suitable for rationalization of audio circuit.
n Features
• Output coupling capacitor is not required (Center
amplifier method)
• Built-in line amplifiers
• Built-in headphone amplifier gain change-over
circuit (8 dB/12 dB)
• Built-in mute circuit
• Built-in beep circuit
• Built-in circuit against a shock noise generated
when power supply is momentary cut off.
n Applications
• Potable CD and MD players, etc.
n Block Diagram
Unit : mm
SSOP024-P-0300B
8 9765431 2 10 11 12
1 171 181920212224 23 16 15 14 13
Ripple Filter
Mute V
REF
Beep
8/12 dB 8/12 dB
0.1
–
0.1
7.8– 0.3
6.1
–
0.3
8.1
–
0.3
(0.5)
0.65
(0.325)
Seating plane
Seating plane
24 13
112
1.2
–
0.2
0.525
–
0.1
0.15
0.525
–
0.1
0.22
+0.1
- 0.05