Part of SoundMax® Audio Solution for Desktop Computers
Mono 1.5 W Differential or Stereo 250 mW Output
Single-Supply Operation: 2.7 V to 6 V
Low Shutdown Current = 60 A
PC 99 Compliant
Low Distortion: 0.2% THD at 1.5 W
Wide Bandwidth: 4 MHz
Desktop, Portable or Palmtop Computers
The SSM2250 is intended for use in desktop computers that have
basic audio functions. It is also ideal for any audio system that needs
to provide both an internal monaural speaker and a stereo line or
headphone output. Combined with an AC’97 Codec it provides a
PC audio system that meets the PC 99 requirements. The SSM2250
is compact and requires a minimum of external components.
The SSM2250 features an audio amplifier capable of delivering
1.5 W of low distortion power into a mono 4 Ω bridged-tied load
(BTL) or 2 ϫ 90 mW into stereo 32 Ω single-ended load (SE)
headphones. Both amplifiers provide rail-to-rail outputs for maxi-
mum dynamic range from a single supply. The balanced output
provides maximum output from 5 V supply and eliminates the
need for a coupling capacitor.
The SSM2250 can automatically switch between an internal
mono speaker and external headphones. The device can run from
a single supply, ranging from 2.7 V to 6 V, with an active supply
current of 9␣ mA typical. The ability to shut down the amplifiers,
(60 µA shutdown current) makes the SSM2250 an ideal speaker
amplifier for battery-powered applications.
The SSM2250 is specified over the industrial (–40°C to +85°C)
temperature range. It is available in 14-lead TSSOP and 10-lead
MSOP surface mount packages.
Mono 1.5 W/Stereo 250 mW
LEFT IN 1
10 LEFT OUT/BTL–
SE/BTL 3 SSM2250 8 BTL+
RIGHT IN 5
6 RIGHT OUT
NC = NO CONNECT
CLICK AND POP
Figure 1. Functional Block Diagram
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Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 1999