Low Distortion 1.5 Watt
Audio Power Amplifier
1.5 Watt Output1
Single-Supply Operation: 2.7 V to 5.5 V
Functions Down to 1.75 V
Wide Bandwidth: 4 MHz
Highly Stable, Phase Margin: > 80 Degrees
Low Distortion: 0.2% THD @ 1 W Output
www.DataSheet4UE.cxocmellent Power Supply Rejection
Personal Wireless Communicators
Musical Toys and Speaking Games
FUNCTIONAL BLOCK DIAGRAM
V – (GND)
The SSM2211 is a high performance audio amplifier that delivers 1
W RMS of low distortion audio power into a bridge-connected 8 Ω
speaker load, (or 1.5 W RMS into 4 Ω load). It operates over a wide
temperature range and is specified for single-supply voltages between
2.7 V and 5.5 V. When operating from batteries, it will continue to
operate down to 1.75 V. This makes the SSM2211 the best choice
for unregulated applications such as toys and games. Featuring a
4 MHz bandwidth, distortion below 0.2 % THD @ 1 W, and the
patented Thermal Coastline leadframe, superior performance is de-
livered at higher power or lower speaker load impedance than com-
petitive units. The advanced mechanical packaging of the SSM2211
gives lower chip temperature, which ensures highly reliable operation
and enhanced trouble free life.
The low differential dc output voltage results in negligible losses
in the speaker winding, and makes high value dc blocking capaci-
tors unnecessary. Battery life is extended by using the Shutdown
mode, which reduces quiescent current drain to typically 100 nA.
The SSM2211 is designed to operate over the –20°C to +85°C
temperature range. See Figure 49 for information on the Thermal
Coastline lead frame. The SSM2211 is available in an SO-8 sur-
face mount package. DIP samples are available; you should request
a special quotation on production quantities. An evaluation board
is available upon request of your local Analog Device sales office.
Applications include personal portable computers, hands-free
telephones and transceivers, talking toys, intercom systems and
other low voltage audio systems requiring 1 W output power.
*Protected by U.S. Patent No. 5,519,576
11.5 W @ 4 Ω, +25°C ambient, < 1% THD, 5 V supply, 4 layer PCB.
2Bridge Tied Load
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.
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
© Analog Devices, Inc., 1997