SSM2311-EVALZ Analog Devices Inc, SSM2311-EVALZ Datasheet

BOARD EVALUATION FOR SSM2311

SSM2311-EVALZ

Manufacturer Part Number
SSM2311-EVALZ
Description
BOARD EVALUATION FOR SSM2311
Manufacturer
Analog Devices Inc
Datasheet

Specifications of SSM2311-EVALZ

Amplifier Type
Class D
Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
3.3W x 1 @ 3 Ohm
Voltage - Supply
2.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Board Type
Fully Populated
Utilized Ic / Part
SSM2311
Silicon Manufacturer
Analog Devices
Application Sub Type
Audio Power Amplifier - Class D
Kit Application Type
Amplifier
Silicon Core Number
SSM2311
Kit Contents
Board
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
FEATURES
Filterless Class-D amplifier with Σ-Δ modulation
No sync necessary when using multiple Analog Devices, Inc.,
3 W into 3 Ω load and 1.4 W into 8 Ω load at 5.0 V supply with
90% efficiency at 5.0 V, 1.4 W into 8 Ω speaker
Better than 98 dB signal-to-noise ratio (SNR)
Single-supply operation from 2.5 V to 5.5 V
20 nA ultralow shutdown current
Short-circuit and thermal protection
Available in 9-ball, 1.5 mm × 1.5 mm WLCSP
Pop-and-click suppression
Built-in resistors reduce board component count
Default fixed 18 dB or user-adjustable gain setting
APPLICATIONS
Mobile phones
MP3 players
Portable gaming
Portable electronics
Educational toys
GENERAL DESCRIPTION
The SSM2311 is a fully integrated, high efficiency, Class-D audio
amplifier. It is designed to maximize performance for mobile
phone applications. The application circuit requires a minimum
of external components and operates from a single 2.5 V to 5.5 V
supply. It is capable of delivering 3 W of continuous output power
with less than 1% THD + N driving a 3 Ω load from a 5.0 V supply.
Rev. 0
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.
Class-D amplifiers
less than 10% total harmonic distortion (THD)
AUDIO IN+
AUDIO IN–
GAIN =
SHUTDOWN
(37.5kΩ + R
22nF
22nF
300kΩ
1
1
1
R
R
INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE
VOLTAGE IS APPROXIMATELY V
EXT
EXT
EXT
)
IN+
IN–
SD
FUNCTIONAL BLOCK DIAGRAM
SSM2311
37.5kΩ
37.5kΩ
300kΩ
300kΩ
BIAS
10µF
Mono 3 W Class-D Audio Amplifier
Figure 1.
DD
/2.
MODULATOR
OSCILLATOR
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The SSM2311 features a high efficiency, low noise modulation
scheme that does not require any external LC output filters. The
modulation continues to provide high efficiency even at low output
power. It operates with 90% efficiency at 1.4 W into 8 Ω or 85%
efficiency at 3 W into 3 Ω from a 5.0 V supply and has an SNR that
is better than 98 dB. Spread-spectrum pulse density modulation
is used to provide lower EMI-radiated emissions compared with
other Class-D architectures.
The SSM2311 has a micropower shutdown mode with a typical
shutdown current of 20 nA. Shutdown is enabled by applying a
logic low to the SD pin.
The device also includes pop-and-click suppression circuitry. This
minimizes voltage glitches at the output during turn-on and turn-
off, thus reducing audible noise on activation and deactivation.
The fully differential input of the SSM2311 provides excellent
rejection of common-mode noise on the input. Input coupling
capacitors can be omitted if the dc input common-mode voltage
is approximately V
The default gain of SSM2311 is 18 dB, but users can reduce the gain
by using a pair of external resistors (see the Gain section).
The SSM2311 is specified over the industrial temperature range
(−40°C to +85°C). It has built-in thermal shutdown and output
short-circuit protection. It is available in a 9-ball, 1.5 mm × 1.5 mm
wafer level chip scale package (WLCSP).
0.1µF
VDD
GND
Filterless High Efficiency
POP-AND-CLICK
SUPPRESSION
DRIVER
FET
VBATT
2.5V TO 5.0V
DD
/2.
©2008 Analog Devices, Inc. All rights reserved.
OUT+
OUT–
SSM2311
www.analog.com

Related parts for SSM2311-EVALZ

SSM2311-EVALZ Summary of contents

Page 1

... Input coupling capacitors can be omitted if the dc input common-mode voltage is approximately V The default gain of SSM2311 is 18 dB, but users can reduce the gain by using a pair of external resistors (see the Gain section). The SSM2311 is specified over the industrial temperature range (− ...

Page 2

... SSM2311 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 Thermal Resistance ...................................................................... 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 Typical Performance Characteristics ............................................. 6 REVISION HISTORY 1/08—Revision 0: Initial Version Typical Application Circuits ......................................................... 13 Application Notes ........................................................................... 15 Overview ..................................................................................... 15 Gain.............................................................................................. 15 Pop-and-Click Suppression ...

Page 3

... DD = 5 3 3 5 3 3 5 3 5.0 V 0.5 = 5.0 V 0.2 1.0 60 800 2.0 2 5.5 4.5 4 37.5 1.2 0 >100 35 98 SSM2311 Max Unit − 1 kHz 12 kΩ μs kΩ μV dB ...

Page 4

... SSM2311 ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings apply at 25°C, unless otherwise noted. Table 2. Parameter Supply Voltage Input Voltage Common-Mode Input Voltage Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only ...

Page 5

... GND 3A OUT+ 2B PVDD BALL A1 CORNER SSM2311 TOP VIEW (BALL SIDE DOWN) Not to Scale Figure 2. SSM2311 WLCSP Pin Configuration Description Shutdown Input. Active low digital input. Noninverting Input. Inverting Input. Inverting Output. Power Supply. Ground. Noninverting Output. Power Supply. Rev Page SSM2311 ...

Page 6

... SSM2311 TYPICAL PERFORMANCE CHARACTERISTICS 100 R = 8Ω, 33µH L GAIN = 18dB 0 3.6V DD 0.01 0.001 0.0001 0.001 0.01 0.1 OUTPUT POWER (W) Figure 3. THD + N vs. Output Power into 8 Ω, A 100 R = 8Ω, 33µH L GAIN = 6dB 3.6V DD 0.01 0.001 0.001 0.01 0.1 0.0001 OUTPUT POWER (W) Figure 4. THD + N vs. Output Power into 8 Ω ...

Page 7

... Figure 13. THD + N vs. Frequency 100 10 1 0.1 0.01 0.001 100k Ω Figure 14. THD + N vs. Frequency Rev Page SSM2311 V = 3.6V DD GAIN = 18dB R = 8Ω, 33µH L 0.5W 0.25W 0.125W 100 1k 10k FREQUENCY (Hz Ω 3.6V DD GAIN = 18dB R = 4Ω, 33µH ...

Page 8

... SSM2311 100 V = 2.5V DD GAIN = 18dB R = 8Ω, 33µ 0.1 0.125W 0.01 0.075W 0.001 10 100 1k FREQUENCY (Hz) Figure 15. THD + N vs. Frequency 2 100 V = 2.5V DD GAIN = 18dB R = 4Ω, 33µ 0.5W 0.1 0.01 0.125W 0.001 10 100 1k FREQUENCY (Hz) Figure 16. THD + N vs. Frequency 2 100 V = 2.5V DD GAIN = 18dB R = 3Ω ...

Page 9

... L 3.5 3.0 2.5 10% 1% 2.0 1.5 1.0 0.5 0 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) 100 3. 2. 0.2 0.4 0.6 0.8 1.0 1.2 1.4 OUTPUT POWER (W) Figure 26. Efficiency vs. Output Power into 8 Ω SSM2311 4.5 5 Ω 4.5 5 Ω 8Ω, 33µH L 1.6 1 ...

Page 10

... SSM2311 100 0.2 0.4 0.6 0.8 1.0 1.2 1.4 OUTPUT POWER (W) Figure 27. Efficiency vs. Output Power into 4 Ω 100 OUTPUT POWER (W) Figure 28. Efficiency vs. Output Power into 3 Ω 0. 8Ω, 33µH L 0.12 0.10 0.08 0.06 0.04 OUTPUT POWER (W) Figure 29. Power Dissipation vs. Output Power into 8 Ω ...

Page 11

... L 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 OUTPUT POWER (W) Figure 37. Supply Current vs. Output Power into 3 Ω 100 1k 10k FREQUENCY (Hz) Figure 38. Power Supply Rejection Ratio vs. Frequency SSM2311 = 5V 2 2.2 2.4 100k ...

Page 12

... SSM2311 8Ω, 33µH L –10 –20 –30 –40 –50 –60 –70 –80 10 100 1k FREQUENCY (Hz) Figure 39. Common-Mode Rejection Ratio vs. Frequency 3. rms RIPPLE – 8Ω, 33µH L –40 –60 –80 –100 –120 –140 10 100 1k FREQUENCY (Hz) Figure 40. Crosstalk vs. Frequency –1 –2 10k 100k – –1 –2 ...

Page 13

... OSCILLATOR 1 INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE VOLTAGE IS APPROXIMATELY V /2. DD Figure 44. Single-Ended Input Configuration Rev Page VBATT 2.5V TO 5.0V VDD OUT+ FET DRIVER OUT– POP/CLICK SUPPRESSION GND VBATT 2.5V TO 5.0V VDD OUT+ FET DRIVER OUT– POP/CLICK SUPPRESSION GND SSM2311 ...

Page 14

... EXT 300kΩ SD BIAS OSCILLATOR ) EXT 1 INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE VOLTAGE IS APPROXIMATELY V /2. DD Figure 45. Differential Input Configuration, User-Adjustable Gain 10µF 0.1µF 300kΩ SSM2311 1 R 37.5kΩ IN+ EXT MODULATOR IN– R 37.5kΩ 1 EXT 300kΩ SD BIAS OSCILLATOR ) EXT ...

Page 15

... SSM2311 amplifiers. The SSM2311 also offers protection circuits for overcurrent and temperature protection. GAIN The SSM2311 has a default gain of 18 dB, but can be reduced by using a pair of external resistors with a value calculated as follows: External Gain Settings = 300k/(37.5k + Rext) POP-AND-CLICK SUPPRESSION Voltage transients at the output of audio amplifiers can occur when shutdown is activated or deactivated ...

Page 16

... This capacitor bypasses low frequency noises to the ground plane. For high frequency transients noises, use a 0.1 μF capacitor as close as possible to the VDD pin of the device. Placing the decoupling capacitor as close as possible to the SSM2311 helps maintain efficiency performance. Rev Page ...

Page 17

... BALL 1 IDENTIFIER (BALL SIDE DOWN) ORDERING GUIDE Model Temperature Range 1 SSM2311CBZ-R2 −40°C to +85°C SSM2311CBZ-REEL 1 −40°C to +85°C 1 SSM2311CBZ-REEL7 −40°C to +85°C SSM2311-EVALZ 1 1 SSM2311-MINI-EVALZ RoHS Compliant Part. 0.65 0.59 1.575 0.53 1.515 SEATING 1.455 PLANE 0.35 0.32 1 ...

Page 18

... SSM2311 NOTES Rev Page ...

Page 19

... NOTES Rev Page SSM2311 ...

Page 20

... SSM2311 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06161-0-1/08(0) Rev Page ...

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