SSM2305-EVALZ: 2.8 W @ 4 Ω, 2.7 ~ 5.5 V


The SSM2305 is a fully integrated, single-chip, mono Class-D audio amplifier that is designed to maximize performance for mobile phone applications. The application circuit operates from a single 2.5 V to 5.5 V supply and is capable of delivering 2.8 W of continuous output power with less than 10% THD + N driving a 4 Ω load from a single 5.0 V supply.

The SSM2305 comes with a differential mode input port and a high efficiency, full H-bridge at the output that enables direct coupling of the audio power signal to the loudspeaker. The differential mode input stage allows for canceling of common-mode noise.

The SSM2305 evaluation board carries a complete application circuit for driving a loudspeaker.


Manufacturer Analog Devices Inc.
Category Audio Amplifiers
Eval Board Part Number SSM2305-EVALZ-ND
Eval Board Supplier Analog Devices Inc.
Eval Board -
Amplifier Type Class D
Number of Outputs Mono
Output Power (RMS) @ Load 2.8 W @ 4 Ω (5V)
Voltage In 2.7 ~ 5.5 V
THD+N (1kHz) @ Conditions < 1% @ 1.34 W (8 Ω, 5V)
< 1% @ 2.22 W (4 Ω, 5V)
Features Filterless Output
Short Circuit Protection
Shutdown, Enable, Standby
Thermal Protection
Turn On/Off Depop
Efficiency @ Conditions >88%, 5V in, 1.3W @ 8 Ω
Component Count + Extras 17 + 6
Design Author Analog Devices
Application / Target Market Cellular Phone
MP3 Players
Standby Current [Typical] 20 nA
Quiescent Current [Typical] 2.4 mA
Quiescent Current [Maximum] 3.2 mA
Standby Current [Maximum] 30 nA
Main I.C. Base Part SSM2305

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