IS31AP4912 Stereo Headphone Driver Evaluation Board Guide
Integrated Silicon Solution, Inc. – www.issi.com
1
RevA, 01/10/2013
Description
The IS31AP4912 is stereo headphone drivers
designed to allow the removal of the output
DC-blocking capacitors for reduced component count
and cost. The IS31AP4912 is ideal for small portable
electronics where size and cost are critical design
parameters.
Features
•
No output DC-blocking capacitors
•
Supply voltage from 2.7V ~ 5.5V
•
Low output noise (7µV)
•
High SNR (103dB)
•
-95dB PSRR
•
Thermal protect circuit
•
Integrated click-and-pop suppression circuitry
•
UTQFN-12 (2mm × 2mm) package
Quick Start
Recommended Equipment
•
5.0V, 2A power supply
•
Audio source (i.e. MP3 player, Notebook PC, etc.)
•
Headphone (32
Ω
)
Absolute Maximum Ratings
•
≤
5.5V power supply
Caution: Do not exceed the conditions listed above; otherwise
the board will be damaged.
Procedure
The IS31AP4912 Evaluation board is fully assembled
and tested. Follow the steps listed below to verify
board operation.
Caution: Do not turn on the power supply until all connections
are completed.
1) Connect headphone (32
Ω
) to the connector (HP
JACK).
2) Connect the ground terminal of the power supply
to the GND and the positive terminal to the VCC.
Or connect DC power to connector (DC IN).
3) Connect the audio sources to the INR terminal
(right channel) and INL terminal (left channel); or
connect audio sources to the connector (AUDIO
IN).
4) Turn on the power supply, and pay attention to the
supply current. If the current exceeds 200mA,
please check for circuit fault.
5) Turn on the audio sources.
Figure 1: Photo of IS31AP4912 Evaluation Board
Ordering Information
Part No.
Temperature Range
Package
IS31AP4912-UTLS2-EB -40
°
C to +85
°
C (Industrial) UTQFN-12, Lead-free
Table 1: Ordering Information
For pricing, delivery, and ordering information, please contacts ISSI’s analog marketing
team at
or (408) 969-6600
