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SSM2211CPZ-R21 Datasheet

  • SSM2211CPZ-R21

  • Low Distortion, 1.5 W Audio Power Amplifier

  • 507.59KB

  • 24頁

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Low Distortion, 1.5 W Audio
Power Amplifier
SSM2211
FEATURES
1.5 W output
1
Differential (BTL
2
) output
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 + N @ 1 W output
Excellent power supply rejection
FUNCTIONAL BLOCK DIAGRAM
IN鈥?/div>
IN+
V
OUT
A
V
OUT
B
BYPASS
APPLICATIONS
Portable computers
Personal wireless communicators
Hands-free telephones
Speaker phones
Intercoms
Musical toys and talking games
SHUTDOWN
BIAS
00358-001
SSM2211
V鈥?(GND)
Figure 1.
GENERAL DESCRIPTION
The SSM2211
3
is a high performance audio amplifier that
delivers 1 W rms of low distortion audio power into a bridge-
connected 8 惟 speaker load (or 1.5 W rms into a 4 惟 load).
It operates over a wide temperature range and is specified for
single-supply voltages between 2.7 V and 5.5 V. When oper-
ating from batteries, it continues 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 and distortion below 0.2% THD
+
N @ 1 W,
superior performance is delivered at higher power or lower
speaker load impedance than competitive units.
The low differential dc output voltage results in negligible
losses in the speaker winding and makes high value dc blocking
capacitors unnecessary. Battery life is extended by using
shutdown mode, which typically reduces quiescent current
drain to 100 nA.
The SSM2211 is designed to operate over the 鈥?0擄C to +85擄C
temperature range. The SSM2211 is available in 8-lead SOIC
(narrow body) and LFCSP (lead frame chip scale) surface-
mount packages. The advanced mechanical packaging of the
LFCSP models ensures lower chip temperature and enhanced
performance relative to standard packaging options.
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.
1
2
At R
L
= 4 惟, T
A
= 25擄C, THD + N < 1%, V
S
= 5 V, 4-layer PCB.
Bridge-tied load.
3
Protected by U.S. Patent No. 5,519,576.
Rev. D
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
漏2006 Analog Devices, Inc. All rights reserved.

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