ssm2211z-eval

Manufacturer Part Numberssm2211z-eval
DescriptionLow Distortion 1.5 Watt Audio Power Amplifier
ManufacturerAnalog Devices, Inc.
ssm2211z-eval datasheet
 


1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Page 1/24

Download datasheet (498Kb)Embed
Next
FEATURES
1
1.5 W output
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
APPLICATIONS
Portable computers
Personal wireless communicators
Hands-free telephones
Speaker phones
Intercoms
Musical toys and talking games
GENERAL DESCRIPTION
3
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 a 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 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
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.
Low Distortion, 1.5 W Audio
Power Amplifier
FUNCTIONAL BLOCK DIAGRAM
IN–
IN+
BYPASS
SHUTDOWN
BIAS
V– (GND)
Figure 1.
shutdown mode, which typically reduces quiescent current
drain to 100 nA.
The SSM2211 is designed to operate over the –40°C to +85°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
At R
= 4 Ω, T
= 25°C, THD + N < 1%, V
= 5 V, 4-layer PCB.
L
A
S
2
Bridge-tied load.
3
Protected by U.S. Patent No. 5,519,576.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
SSM2211
V
A
OUT
V
B
OUT
SSM2211
www.analog.com

ssm2211z-eval Summary of contents

  • Page 1

    ... T = 25°C, THD + N < 1 4-layer PCB Bridge-tied load. 3 Protected by U.S. Patent No. 5,519,576. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. SSM2211 V A OUT V B OUT SSM2211 www.analog.com ...

  • Page 2

    SSM2211 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Electrical Characteristics ................................................................. 3 Absolute Maximum Ratings............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution.................................................................................. 5 Pin Configurations and ...

  • Page 3

    ELECTRICAL CHARACTERISTICS 25° Ω 0.1 μ Table 1. Parameter GENERAL CHARACTERISTICS Differential Output Offset Voltage Output Impedance SHUTDOWN CONTROL Input Voltage High Input Voltage ...

  • Page 4

    SSM2211 25° Ω 0.1 μ Table 3. Parameter GENERAL CHARACTERISTICS Differential Output Offset Voltage Output Impedance SHUTDOWN CONTROL Input Voltage High Input Voltage Low ...

  • Page 5

    ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings apply at 25°C, unless otherwise noted. Table 4. Parameter Supply Voltage Input Voltage Common-Mode Input Voltage ESD Susceptibility Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature Range, Soldering (60 sec) Stresses ...

  • Page 6

    SSM2211 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS SHUTDOWN 1 SSM2211 BYPASS 2 IN+ 3 TOP VIEW (Not to Scale) IN– 4 Figure 2. 8-Lead SOIC_N Pin Configuration (R-8) Table 6. Pin Function Descriptions Pin No. Mnemonic Description 1 SHUTDOWN Shutdown Enable. ...

  • Page 7

    TYPICAL PERFORMANCE CHARACTERISTICS 25° (BTL 8Ω 500mW 0.1μ 1μF B 0.1 0.01 ...

  • Page 8

    SSM2211 25° (BTL 8Ω L FREQUENCY = 20Hz C = 0.1μ 0.1 0.01 20n 0.1 P (W) OUTPUT Figure 10. THD + N vs. ...

  • Page 9

    T = 25° 3. (BTL 8Ω L FREQUENCY = 20Hz C = 0.1μ 0.1 0.01 20n 0.1 P (W) OUTPUT Figure 16. THD + N vs. P ...

  • Page 10

    SSM2211 25° 2. (BTL 8Ω L FREQUENCY = 20Hz 1 0.1 0.01 20n 0.1 P (W) OUTPUT Figure 22. THD + N vs ...

  • Page 11

    T = 25° 2. (BTL 8Ω L FREQUENCY = 20Hz C = 0.1μ 3.3V DD 0.1 0.01 20n 0.1 P (W) OUTPUT Figure 28. THD ...

  • Page 12

    SSM2211 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 2. LOAD RESISTANCE (Ω) Figure 34. P vs. Load Resistance OUTPUT –20 –40 –60 –80 100 1k ...

  • Page 13

    3. SAMPLE SIZE = 300 SAMPLE SIZE = 300 –30 –20 – OUTPUT OFFSET VOLTAGE (mV) Figure 38. Output Offset Voltage Distribution 600 V = ...

  • Page 14

    ... This eliminates the need for a coupling capacitor at the output THERMAL PERFORMANCE—LFCSP 50kΩ The addition of the LFCSP to the Analog Devices, Inc., package portfolio offers the SSM2211 user even greater choice when considering thermal performance criteria. For the 8-lead × ...

  • Page 15

    TYPICAL APPLICATIONS AUDIO – INPUT 5 SSM2211 Figure 42. Typical Configuration Figure 42 shows how the SSM2211 is connected in a ...

  • Page 16

    SSM2211 POWER DISSIPATION Another important advantage in using a bridged-output config- uration is the fact that bridged-output amplifiers are more efficient than single-ended amplifiers in delivering power to a load. Efficiency is defined as the ratio of power from the ...

  • Page 17

    0.30 0.25 0.20 0.15 0. 16Ω 0.1 0.2 OUTPUT POWER (W) Figure 45. Power Dissipation vs. Single-Ended Output Power with The maximum power dissipation ...

  • Page 18

    SSM2211 The input signal to the SSM2211 is also connected to the non- inverting terminal of A2. R1, R2, and R3 set the threshold voltage at which the SSM2211 taken out of shutdown mode. D1 half-wave rectifies ...

  • Page 19

    The extra supply voltage also allows the SSM2211 to reproduce peaks in excess without clipping the signal. With and Ω, Equation 9 shows that DD L the maximum ...

  • Page 20

    SSM2211 The polarity of the speakers is important, as each output is 180 degrees out of phase with the other. By connecting the minus terminal of Speaker 1 to Pin 5, and the plus terminal of Speaker 2 to Pin ...

  • Page 21

    OUTLINE DIMENSIONS 0.25 (0.0098) 0.10 (0.0040) COPLANARITY PIN 1 INDICATOR 0.90 MAX 0.85 NOM SEATING PLANE ORDERING GUIDE Model Temperature Range SSM2211CP-R2 –40°C to +85°C SSM2211CP-REEL –40°C to +85°C SSM2211CP-REEL7 –40°C to +85°C 1 SSM2211CPZ-R2 –40°C to +85°C SSM2211CPZ-REEL 1 ...

  • Page 22

    SSM2211 NOTES Rev Page ...

  • Page 23

    NOTES Rev Page SSM2211 ...

  • Page 24

    ... SSM2211 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C00358-0-11/06(D) Rev Page ...