SSM2315-EVALZ Analog Devices Inc, SSM2315-EVALZ Datasheet

BOARD EVAL SSM2315

SSM2315-EVALZ

Manufacturer Part Number
SSM2315-EVALZ
Description
BOARD EVAL SSM2315
Manufacturer
Analog Devices Inc
Datasheets

Specifications of SSM2315-EVALZ

Amplifier Type
Class D
Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
4.28W 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
SSM2315
Silicon Manufacturer
Analog Devices
Application Sub Type
Audio Power Amplifier - Class D
Kit Application Type
Amplifier
Silicon Core Number
SSM2315
Kit Contents
Board
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
Filterless Class-D amplifier with Σ-Δ modulation
No sync necessary when using multiple Class-D amplifiers
3 W into 3 Ω load and 1.4 W into 8 Ω load at 5.0 V supply
93% efficiency at 5.0 V, 1.4 W into 8 Ω speaker
>103 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 6 dB or user adjustable gain setting
APPLICATIONS
Mobile phones
MP3 players
Portable gaming
Portable electronics
Educational toys
GENERAL DESCRIPTION
The SSM2315 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 <1% THD + N driving a 3 Ω load from a 5.0 V supply.
Rev. A
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.
from Analog Devices, Inc.
with <1% total harmonic distortion (THD + N)
SHUTDOWN
*INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE
VOLTAGE IS APPROXIMATELY V
AUDIO IN+
AUDIO IN–
47nF*
47nF*
FUNCTIONAL BLOCK DIAGRAM
IN+
IN–
SD
SSM2315
80kΩ
80kΩ
DD
/2.
BIAS
MODULATOR
Mono 3 W Class-D Audio Amplifier
10µF
Figure 1.
160kΩ
160kΩ
(Σ-Δ)
OSCILLATOR
INTERNAL
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The SSM2315 features a high efficiency, low noise modulation
scheme that requires no external LC output filters. The modulation
continues to provide high efficiency even at low output power.
It operates with 93% 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 of >103 dB.
Spread-spectrum pulse density modulation is used to provide
lower EMI-radiated emissions compared with other Class-D
architectures.
The SSM2315 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 suppression circuitry minimizes voltage glitches at the
output during turn-on and turn-off, reducing audible noise
on activation and deactivation.
The fully differential input of the SSM2315 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 the SSM2315 is 6 dB, but users can reduce the
gain by using a pair of external resistors (see the Gain section).
The SSM2315 is specified over the industrial temperature range of
−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
DRIVER
FET
GND
Filterless, High Efficiency,
SUPPRESSION
POP/CLICK
VDD
OUT+
OUT–
VBATT
2.5V TO 5.5V
DD
/2.
©2008 Analog Devices, Inc. All rights reserved.
SSM2315
www.analog.com

Related parts for SSM2315-EVALZ

SSM2315-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 the SSM2315 is 6 dB, but users can reduce the gain by using a pair of external resistors (see the Gain section). The SSM2315 is specified over the industrial temperature range of − ...

Page 2

... SSM2315 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 8/08—Rev Rev. A Changes to Efficiency and Total Harmonic Distortion + Noise Parameters ....................................................... 3 Changes to Ordering Guide .......................................................... 14 2/08— ...

Page 3

... NOISE PERFORMANCE Output Voltage Noise e Signal-to-Noise Ratio SNR 1 Note that although the SSM2315 has good audio quality above 3 W, continuous output power beyond 3 W must be avoided due to device packaging limitations. 2 This value represents measured performance; packaging limitations must not be exceeded. 1 Conditions Ω ...

Page 4

... SSM2315 ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings apply at 25°C, unless otherwise noted. Table 2. Parameter Supply Voltage Input Voltage Common-Mode Input Voltage Continuous Output Power 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 SSM2315 TOP VIEW BALL SIDE DOWN (Not to Scale) Figure 2. Pin Configuration Description Shutdown Input. Active low digital input. Ground. Noninverting Input. Inverting Input. Noninverting Output. Power Supply. Ground. Inverting Output. Power Supply. Rev Page SSM2315 ...

Page 6

... SSM2315 TYPICAL PERFORMANCE CHARACTERISTICS 100 R = 8Ω + 33µH L GAIN = 6dB 0.1 0.01 0.001 0.0001 0.001 0.01 0.1 OUTPUT POWER (W) Figure 3. THD + N vs. Output Power Ω μH, Gain = 100 R = 4Ω + 33µH L GAIN = 6dB 0.1 0.01 0.001 0.0001 0.001 0.01 0.1 OUTPUT POWER (W) Figure 4 ...

Page 7

... DD L 100 V = 2.5V DD GAIN = 6dB R = 4Ω + 33µ 0.5W 0.1 0.25W 0.125W 10 100 1k 10k FREQUENCY (Hz Ω μH, Gain = 100 V = 2.5V DD GAIN = 6dB R = 3Ω + 33µ 0.75W 1 0.1 0.375W 0.188W 10 100 1k 10k FREQUENCY (Hz Ω μH, Gain = SSM2315 100k 100k 100k ...

Page 8

... SSM2315 4.1 3.9 3 3Ω + 33µ 4Ω + 33µH L 3.3 NO LOAD 3.1 2.9 2.7 2.5 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) Figure 15. Supply Current vs. Supply Voltage 2.0 FREQUENCY = 1kHz GAIN = 6dB 1 8Ω + 33µH L 1.6 1.4 1.2 10% 1.0 0.8 0.6 ...

Page 9

... V Figure 25. Supply Current vs. Output Power 800 R 700 600 500 400 300 200 100 0 0.7 0.8 0 3.6 V Figure 26. Supply Current vs. Output Power Rev Page SSM2315 = 3. 4Ω + 33µH L 0.2 0.4 0.6 0.8 1.0 1.2 1.4 OUTPUT POWER ( Ω μ 8Ω + 33µ ...

Page 10

... SSM2315 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 10 100 1k FREQUENCY (Hz) Figure 27. Power Supply Rejection Ratio (PSRR) vs. Frequency 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 10 100 1k FREQUENCY (Hz) Figure 28. Common-Mode Rejection Ratio (CMRR) vs. Frequency –1 –2 10k 100k – ...

Page 11

... DRIVER IN– EXT 47nF 160kΩ SD INTERNAL BIAS OSCILLATOR Figure 32. Single-Ended Input Configuration, User-Adjustable Gain Rev Page VBATT 2.5V TO 5.5V VDD OUT+ FET OUT– POP/CLICK SUPPRESSION GND VBATT 2.5V TO 5.5V VDD OUT+ FET OUT– POP/CLICK SUPPRESSION GND SSM2315 ...

Page 12

... SSM2315 amplifiers. The SSM2315 also offers protection circuits for overcurrent and temperature protection. GAIN The SSM2315 has a default gain that can be reduced by using a pair of external resistors with a value calculated as follows: External Gain Settings = 160 kΩ/(80 kΩ POP-AND-CLICK SUPPRESSION Voltage transients at the output of audio amplifiers may occur when shutdown is activated or deactivated ...

Page 13

... ESL, low ESR capacitor, usually of around 4.7 μF. 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 SSM2315 helps maintain efficient performance. Rev Page SSM2315 − ...

Page 14

... TOP VIEW (BALL SIDE DOWN) ORDERING GUIDE Model Temperature Range 1 SSM2315CBZ-R2 −40°C to +85°C SSM2315CBZ-REEL 1 −40°C to +85°C 1 SSM2315CBZ-REEL7 −40°C to +85°C 1 SSM2315-EVALZ RoHS Compliant Part. 0.655 0.600 0.545 SEATING PLANE 0.350 0.320 0.290 0.50 BALL PITCH 0.385 0.270 ...

Page 15

... NOTES Rev Page SSM2315 ...

Page 16

... SSM2315 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06857-0-8/08(A) Rev Page ...

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