ISSI IS31AP2111 Manual

IS31AP2111 2×20W STEREO DIGITAL (I2S) AUDIO
AMPLIFIER WITH 20 BANDS EQ FUNCTIONS
DESCRIPTION
The IS31AP2111 is a digital I2S interface audio
amplifier capable of driving a pair of 8Ω speakers at
20W when operating from a 24V supply. Due to its
Class-D output drive stage, it can operate without an
external heat-sink or fan.
The IS31AP2111 integrates
processing capabilities, such as volume control, 20
bands speaker EQ, audio mixing, 3D surround and
Dynamic Range Control (DRC). These functions are
fully programmable via a simple I2C control interface.
Robust protection circuits are provided to protect the
IS31AP2111 from damage
erroneous operating conditions. Because of its digital
design, the IS31AP2111 is more tolerant to noise and
PVT (Process, Voltage, and Temperature) variation
than the analog Class-AB or Class-D audio amplifier
counterpart. It has built-in anti-pop circuitry for pop free
operation during power ON.
QUICK START
Figure 1: Photo of IS31AP2111 Evaluation Board
ORDERING INFORMATION
Part No.
IS31AP2111-ZLS1-EB
For pricing, delivery, and ordering information, please contacts ISSI's analog marketing team at
analog@issi.com or (408) 969-6600.
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 12/19/2014
advanced audio
due to accidental
Temperature Range
0°C to +70°C (Industrial)
Table 1: Ordering Information
FEATURES

16/18/20/24-bits input with I2S, Left-alignment and
Right-alignment data format

PSNR & DR (A-weighting)
Loudspeaker: 99dB (PSNR), 104dB (DR) @24V

Supply voltage
- 3.3V for digital circuit
- 10V~26V for loudspeaker driver

Loudspeaker output power for at 24V
- 10W × 2CH into 8Ω @0.24% THD+N for stereo
- 20W × 2CH into 8Ω @0.38% THD+N for stereo

Sound processing including:
- 20 bands parametric speaker EQ
- Volume control (+24dB ~ -103dB, 0.125dB/step),
- Dynamic range control (DRC)
- Dual band dynamic range control
- 3D surround sound
- Channel mixing
- Bass/Treble tone control

Anti-pop design

Short circuit and over-temperature protection

I2C control interface with selectable device
address

Support hardware and software reset

Power saving mode
ABSOLUTE MAXIMUM RATINGS

≤ 26V power supply

≥ 8Ω speaker
Caution: Do not exceed the conditions listed above; otherw
ise the board will be damaged.
RECOMMENDED EQUIPMENT

10~26V, 4A power supply

I2C programmer to set register values

Pair of 8Ω 20W speakers with RCA plug

Audio source with 3.5mm mini plug
Package
eTSSOP-24,Lead-free
1