SSM2317-EVALZ Analog Devices Inc, SSM2317-EVALZ Datasheet

BOARD EVAL SSM2317

SSM2317-EVALZ

Manufacturer Part Number
SSM2317-EVALZ
Description
BOARD EVAL SSM2317
Manufacturer
Analog Devices Inc
Datasheet

Specifications of SSM2317-EVALZ

Amplifier Type
Class D
Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
3.89W 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
SSM2317
Silicon Manufacturer
Analog Devices
Application Sub Type
Audio Power Amplifier - Class D
Kit Application Type
Amplifier
Silicon Core Number
SSM2317
Kit Contents
Board
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
Filterless Class-D amplifier with Σ-Δ modulation
Automatic level control (ALC) improves dynamic range and
3 W into 3 Ω load and 1.4 W into 8 Ω load at 5.0 V supply
700 mW into 8 Ω load at 4.2 V supply (ALC 80%)
93% efficiency at 5.0 V, 1.4 W into 8 Ω speaker
>93 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 SSM2317 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
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.
prevents clipping
with <10% total harmonic distortion (ALC off)
SHUTDOWN
AUDIO IN+
AUDIO IN–
1
INPUT CAPACITORS ARE OPTIONAL IF INPUT DC COMMON-MODE
VOLTAGE IS APPROXIMATELY V
0.1µF
0.1µF
1
1
IN+
IN–
SD
10kΩ
10kΩ
BIAS
FUNCTIONAL BLOCK DIAGRAM
ALC_EN
ALC ENABLE
80kΩ
80kΩ
DD
/2.
ALC
Mono 3 W Class-D Audio Amplifier
Figure 1.
VTH
R
TH
SSM2317
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
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.
The SSM2317 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 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
>93 dB. Spread-spectrum pulse density modulation is used to
provide lower EMI radiated emissions compared with other
Class-D architectures.
Automatic level control (ALC) can be activated to suppress
clipping and improve dynamic range. This feature only requires
one external resistor tied to GND via the VTH pin and an
activation voltage on the ALC_EN pin.
The SSM2317 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, reducing audible noise on activation and deactivation.
The default gain of the SSM2317 is 18 dB, but users can reduce the
gain by using a pair of external resistors (see the Gain section).
The SSM2317 is specified over the commercial 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).
10µF
MODULATOR
OSCILLATOR
INTERNAL
(Σ-Δ)
Filterless High Efficiency
0.1µF
POP-AND-CLICK
SUPPRESSION
DRIVER
VDD
FET
GND
©2008 Analog Devices, Inc. All rights reserved.
VBATT
2.5V TO 5.5V
OUT+
OUT–
SSM2317
www.analog.com

Related parts for SSM2317-EVALZ

SSM2317-EVALZ Summary of contents

Page 1

... The default gain of the SSM2317 is 18 dB, but users can reduce the gain by using a pair of external resistors (see the Gain section). The SSM2317 is specified over the commercial temperature range of − ...

Page 2

... SSM2317 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution .................................................................................. 5 Pin Configuration and Function Descriptions ............................. 6 Typical Performance Characteristics ............................................. 7 Typical Application Circuits .......................................................... 13 Theory of Operation ...................................................................... 14 Overview ...................................................................................... 14 REVISION HISTORY 6/08—Rev Rev. A Changes to Figure 1 .......................................................................... 1 Changes to Table 2 ...

Page 3

... V 1. 5 3 5 3 5 3 5.0 V 0.02 = 3.6 V 0.02 DD 1.0 57 280 2.0 2 3.6 3.2 2.7 = 5 3 2 1.2 0 >100 SSM2317 Max Unit − 1 kHz mV 5 kΩ kΩ μs kΩ ...

Page 4

... SSM2317 Parameter NOISE PERFORMANCE Output Voltage Noise Signal-to-Noise Ratio 1 Although the SSM2317 has good audio quality above 3 W, continuous output power beyond 3 W must be avoided due to device packaging limitations. Symbol Conditions 3 kHz, inputs are ac grounded gain = 18 dB, A-weighted SNR Ω ...

Page 5

... Table 3. Thermal Resistance 6 V Package Type V DD 9-Ball, 1.5 mm × 1.5 mm WLCSP −65°C to +150°C −40°C to +85°C ESD CAUTION −65°C to +165°C 300° Rev Page SSM2317 PCB θ θ Unit JA JB 1S0P 162 39 °C/W 2S0P 76 21 °C/W ...

Page 6

... OUT− 3C OUT+ BALL A1 CORNER SSM2317 TOP VIEW (BALL SIDE DOWN) Not to Scale Figure 2. Pin Configuration Description Inverting Input. Noninverting Input. Ground. Shutdown Input. Active low digital input. Automatic Level Control Enable Input. Active high digital input. Power Supply. Variable Threshold. ...

Page 7

... FREQUENCY (Hz Ω μH, Gain = 100 GAIN = 18dB R = 4Ω + 33µ 0.1 0.01 0.5W 10 100 1k 10k FREQUENCY (Hz Ω μH, Gain = 100 GAIN = 18dB R = 3Ω + 33µ 0.1 1.5W 0.01 0.75W 10 100 1k 10k FREQUENCY (Hz Ω μH, Gain = SSM2317 100k 2W 1W 100k 100k ...

Page 8

... SSM2317 100 V = 3.6V DD GAIN = 18dB R = 8Ω + 33µ 0.1 0.5W 0.125W 0.01 0.25W 0.001 10 100 1k FREQUENCY (Hz) Figure 9. THD + N vs. Frequency 3 100 V = 3.6V DD GAIN = 18dB R = 4Ω + 33µ 0.1 0.25W 0.01 0.5W 0.001 10 100 1k FREQUENCY (Hz) Figure 10. THD + N vs. Frequency 3 100 V = 3.6V DD GAIN = 18dB R = 3Ω ...

Page 9

... Figure 20. Efficiency vs. Output Power into 4 Ω μH Rev Page SSM2317 = 3Ω + 33µ NOT EXCEED 3W CONTINUOUS OUTPUT POWER 10% 1% 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE ( Ω ...

Page 10

... SSM2317 100 3. 2. 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 OUTPUT POWER (W) Figure 21. Efficiency vs. Output Power into 3 Ω μH 0. 8Ω + 33µH L 0.10 0. 3.6V DD 0. 0.2 0.4 0.6 0.8 1 ...

Page 11

... Figure 30. Supply Current vs. Supply Voltage, ALC Contribution 100 100k 0 8Ω + 33µH L ALC = ON 1 0.1 0.01 0.001 0.01 100k Figure 32. Input/Output Characteristic, V Rev Page SSM2317 ALC = ON NO LOAD ALC = OFF NO LOAD 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE ( 100 1k 10k R (kΩ) TH Figure 31 90% ...

Page 12

... SSM2317 3. 8Ω + 33µH L ALC = ON 1 0.1 0.01 0.001 0.01 0.1 INPUT (V rms) Figure 33. Input/Output Characteristic, V 1V/DIV INPUT OUTPUT ALC = –0.2 0 0.2 0.4 0.6 0.8 1.0 TIME (ms) Figure 34. Attack Waveform, 1 kHz Sine Wave 1V/DIV INPUT V DD ATTACK TIME R = 8Ω + 33µH ...

Page 13

... Figure 40. Single-Ended Input Configuration, User-Adjustable Gain Rev Page VBATT 2.5V TO 5.5V 0.1µF VDD OUT+ FET (Σ-Δ) DRIVER OUT– POP-AND-CLICK SUPPRESSION GND VBATT 2.5V TO 5.5V 0.1µF VDD OUT+ FET (Σ-Δ) DRIVER OUT– POP-AND-CLICK SUPPRESSION GND SSM2317 ...

Page 14

... SSM2317 amplifiers. The SSM2317 also offers protection circuits for overcurrent and temperature protection. GAIN The SSM2317 has a default gain that can be reduced by using a pair of external resistors with a value calculated as follows: External Gain Settings = 80 kΩ/(10 kΩ POP-AND-CLICK SUPPRESSION Voltage transients at the output of the audio amplifiers can occur when shutdown is activated or deactivated ...

Page 15

... If high-pass filtering is needed at the input, the input capacitor and the input resistor of the SSM2317 form a high-pass filter whose corner frequency is determined by the following equation 1/{2π ...

Page 16

... SSM2317 OUTPUT THRESHOLD The maximum output amplitude threshold (V limiting mode can be changed from 90 having an external resistor between the VTH pin and GND. TH Shorting the VTH pin to GND sets V TH the VTH pin unconnected sets shown by the following equation kΩ ...

Page 17

... SQ A1 BALL 1.430 CORNER TOP VIEW (BALL SIDE DOWN) ORDERING GUIDE Model Temperature Range 1 SSM2317CBZ-REEL −40°C to +85°C SSM2317CBZ-REEL7 1 −40°C to +85°C 1 SSM2317-EVALZ SSM2317-MINI-EVALZ RoHS Compliant Part. 0.655 0.600 0.545 SEATING PLANE 0.350 0.320 0.290 0.50 BALL PITCH 0.385 ...

Page 18

... SSM2317 NOTES Rev Page ...

Page 19

... NOTES Rev Page SSM2317 ...

Page 20

... SSM2317 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07242-0-6/08(A) Rev Page ...

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