LM4934
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SNAS343F – OCTOBER 2005 – REVISED APRIL 2013
LM4934 Boomer™ Audio Power Amplifier Series 3D Audio Sub-System with Stereo
Speaker, OCL/SE Stereo Headphone, Earpiece and Mono Line Level Outputs
Check for Samples: LM4934
FEATURES
DESCRIPTION
•
•
•
•
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The LM4934 is an integrated audio sub-system
designed for stereo cell phone applications.
Operating on a 3.3V supply, it combines a stereo
speaker amplifier delivering 520mW per channel into
an 8Ω load, a stereo headphone amplifier delivering
36mW per channel into a 32Ω load, a mono earpiece
amplifier delivering 55mW into a 32Ω load, and a line
output for an external powered handsfree speaker. It
integrates the audio amplifiers, volume control, mixer,
power management control, and Texas Instruments
3D enhancement all into a single package. In
addition, the LM4934 routes and mixes the stereo
and mono inputs into multiple distinct output modes.
The LM4934 features an I2S serial interface for full
range audio and an I2C/SPI compatible interface for
control.
1
23
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18-bit Stereo DAC
Multiple Distinct Output Modes
Stereo Speaker Amplifier
Stereo Headphone Amplifier
Mono Earpiece Amplifier
Mono Line Output for External Handsfree
Carkit
Independent Left, Right, Headphone and Mono
Speaker Volume Controls
Texas Instruments 3D Enhancement with
Programmable Effect Level
I2C/SPI (Selectable) Compatible Interface
Ultra Low Shutdown Current
Click and Pop Suppression Circuit
APPLICATIONS
•
•
Boomer audio power amplifiers are designed
specifically to provide high quality output power with a
minimal amount of external components.
Cell Phones
PDAs
KEY SPECIFICATIONS
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•
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POUT, Stereo BTL, 8Ω, 3.3V,
1% THD+N, 520mW (Typ)
POUT HP, 32Ω, 3.3V,
1% THD+N, 36mW (Typ)
POUT Mono Earpiece, 32Ω, 3.3V,
1% THD+N, 55mW (Typ)
Shutdown Current, 0.6µA (Typ)
DAC SNR, 95dB (Typ)
1
2
3
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Boomer is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2013, Texas Instruments Incorporated
LM4934
SNAS343F – OCTOBER 2005 – REVISED APRIL 2013
www.ti.com
Block Diagram
R3DIN
LIN
Ch A*
-6 dB to 15 dB
2
I S_CLK
2
I S_SDI
2
I S_WS
I S
Interface
and
DAC
2
I C VDD
SDA/SDI
SCL/SCK
ADDR/ENB
MODE
DAC gain
-3 dB to 6 dB
2
Mono*
-6 dB to 15 dB
National
3D
RIN
PLL
L3DIN
MIN
L3DOUT
R3DOUT
MCLK
PLL_IN
PLL_OUT
VoL#
5~-56 dB
+6 dB
VoL#
5~-56 dB
+6 dB
Stereo Speaker
520 mW/ch 8:
Class AB
VoL#
5~-56 dB
Mixer
and
Mode
Select
Capless Output
External Stereo
headphone
36 mW/32:
VoL#
5~-56 dB
2
I C / SPI
Interface
Internal
Mono Earpiece
55 mW/32:
Mono
VoL#
5~-56 dB
+6 dB
Power
and Bias
AVDD
Line Out
Bypass
Cap
Figure 1. Audio Sub-System Block Diagram with OCL HP Outputs
R3DIN
LIN
I S_CLK
2
I S_SDI
2
I S_WS
Ch A*
-6 dB to 15 dB
2
I S
Interface
and
DAC
2
I C VDD
SDA/SDI
SCL/SCK
ADDR/ENB
MODE
DAC gain
-3 dB to 6 dB
2
Mono*
-6 dB to 15 dB
National
3D
RIN
PLL
L3DIN
MIN
L3DOUT
R3DOUT
MCLK
PLL_IN
PLL_OUT
Mixer
& Mode
Select
VoL#
5~-56 dB
+6 dB
VoL#
5~-56 dB
+6 dB
Stereo Speaker
520 mW/ch 8:
Class AB
VoL#
5~-56 dB
Cap-Coupled
External Stereo
headphone
36 mW/32:
VoL#
5~-56 dB
2
I C / SPI
Interface
VoL#
5~-56 dB
Power
and Bias
AVDD
Internal
Mono Earpiece
55 mW/32:
Mono
+6 dB
Line Out
Bypass
Cap
Figure 2. Audio Sub-System with SE HP Outputs
2
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LM4934
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SNAS343F – OCTOBER 2005 – REVISED APRIL 2013
Connection Diagram
6
5
4
3
2
1
A
B
C
D
E
F
G
Figure 3. 42-Bump DSBGA
Top View (Bump Side Down)
See Package Number YPG0042
PIN FUNCTIONS
PIN
PIN NAME
D/A
I/O
DESCRIPTION
A1
DGND
D
P
DIGITAL GROUND
A2
MCLK
D
I
MASTER CLOCK
A3
I2S_WS
D
I/O
I2S WORD SELECT
A4
GPIO
D
O
TEST PIN (MUST BE LEFT FLOATING)
A5
ADDR/ENB
D
I
I2C_ADDR OR SPI_ENB DEPENDING ON I2C or SPI MODE SELECT
A6
DVDD
D
P
DIGITAL SUPPLY VOLTAGE
B1
PLLVDD
D
P
PLL SUPPLY VOLTAGE
B2
I2S_SDI
D
I
I2S SERIAL DATA INPUT
B3
I2S_CLK
D
I/O
I2S CLOCK SIGNAL
B4
MODE
D
I
SELECTS BETWEEN SPI AND I2C CONTROL INTERFACE
B5
I2C_VDD
D
P
I2C SUPPLY VOLTAGE
B6
VDDIO
D
P
I/O SUPPLY VOLTAGE
C1
PLL_IN
D
I
PLL FILTER INPUT
C2
PLL_OUT
D
O
PLL FILTER OUTPUT
C3
PLLGND
D
P
PLL GND
C4
SDA/SDI
D
I/O
I2C SDA OR SPI SDI
C5
SCL/SCK
D
I
I2C_SCL OR SPI_SCK
C6
AVDD
A
P
ANALOG SUPPLY VOLTAGE
D1
AGND
A
P
ANALOG GROUND
D2
RIN
A
I
RIGHT ANALOG IN
D3
NC
A
D4
BYPASS
A
I
HALF-SUPPLY BYPASS
D5
LINEOUT
A
O
MONO LINE OUT
D6
RHP
A
O
RIGHT HEADPHONE OUTPUT
E1
EP-
A
O
MONO EARPIECE OUT-
E2
MIN
A
I
MONO ANALOG IN
E3
LIN
A
I
LEFT ANALOG IN
E4
R3DOUT
A
I
RIGHT CHANNEL 3D OUTPUT
E5
LHP
A
O
LEFT HEADPHONE OUTPUT
E6
CHP
A
O
HEADPHONE CENTER PIN OUTPUT (1/2 VDD)
F1
AGND
A
P
ANALOG GND
F2
EP+
A
O
MONO EARPIECE OUT+
NO CONNECT
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LM4934
SNAS343F – OCTOBER 2005 – REVISED APRIL 2013
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PIN FUNCTIONS (continued)
F3
L3DIN
A
I
LEFT CHANNEL 3D INPUT
F4
L3DOUT
A
I
LEFT CHANNEL 3D OUTPUT
F5
R3DIN
A
I
RIGHT CHANNEL 3D INPUT
F6
AGND
A
P
ANALOG GND
G1
LLS-
A
O
LEFT SPEAKER OUT-
G2
AVDD
A
P
ANALOG SUPPLY VOLTAGE
G3
LLS+
A
O
LEFT SPEAKER OUT+
G4
RLS-
A
O
RIGHT SPEAKER OUT-
G5
AVDD
A
P
ANALOG SUPPLY VOLTAGE
G6
RLS+
A
O
RIGHT SPEAKER OUT+
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings (1) (2) (3)
Analog Supply Voltage
6.0V
Digital Supply Voltage
6.0V
Storage Temperature
-65°C to +150°C
Input Voltage
-0.3V to VDD +0.3V
(4)
Internally Limited
ESD Susceptibility (5)
2000V
ESD Susceptibility (6)
200V
Power Dissipation
Junction Temperature
Thermal Resistance
150°C
θJA (YPG0042)
61°C/W
See AN-1279 (Literature Number SNOA430)
(1)
(2)
(3)
(4)
(5)
(6)
All voltages are measured with respect to the GND pin unless otherwise specified.
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX ,θJA, and the ambient temperature,
TA. The maximum allowable power dissipation is PDMAX = (TJMAX – TA) / θ JA or the number given in Absolute Maximum Ratings,
whichever is lower.
Human body model: 100pF discharged through a 1.5kΩ resistor.
Machine model: 220pF - 240pF discharged through all pins.
Operating Ratings
Temperature Range
TMIN ≤ TA ≤ TMAX
−40°C ≤ TA ≤ +85°C
2.7V ≤ AVDD ≤ 5.5V
2.7V ≤ DVDD ≤ 4.0V
Supply Voltage
2.4V ≤ I2CVDD ≤ 4.0V
4
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SNAS343F – OCTOBER 2005 – REVISED APRIL 2013
Audio Amplifier Electrical Characteristics AVDD = 3.0V, DVDD = 3.0V (1) (2)
The following specifications apply for the circuit shown in Figure 1 with all programmable gain set at 0dB, unless otherwise
specified. Limits apply for TA = 25°C.
Symbol
IDD
Supply Current
ISD
Shutdown Current
PO
VFS
Parameter
THD+N
VOS
Offset Voltage
VIN = 0, No Load
All Amps On + DAC, OCL
18.5
26.5
mA (max)
Headphone Mode Only, OCL
5.6
8
mA (max)
Stereo Speaker Mode Only
12
19.5
mA (max)
Mono Speaker Mode Only
5.9
8
mA (max)
DAC Off, All Amps On, OCL
14.6
22
mA (max)
0.6
2
μA (max)
420
370
mW (min)
Headphone; THD = 1%;
f = 1kHz, 32Ω SE
27
24
Earpiece; THD = 1%;
f = 1kHz, 32Ω BTL
45
40
Vpp
0.04
%
Headphone; PO = 10mW;
f = 1kHz, 32Ω SE
0.01
%
Earpiece; PO = 20mW;
f = 1kHz, 32Ω BTL
0.04
%
Line Out; VO = 1Vrms; f = 1kHz, 10kΩ SE
0.004
%
Speaker
8
55
mV (max)
Earpiece
8
50
mV (max)
HP (OCL)
8
40
mV
See
Table 1
PSRR
Power Supply Rejection Ratio
f = 217Hz; Vripple = 200mVP-P
CB = 2.2μF; See Table 2
See
Table 2
(1)
(2)
(3)
(4)
(5)
(6)
Wake-Up Time
mW (min)
2.4
A = weighted; 0dB gain;
See Table 1
TWU
mW (min)
Speaker; PO = 200mW;
f = 1kHz, 8Ω BTL
Output Noise
Crosstalk
)
Speaker; THD = 1%;
f = 1kHz, 8Ω BTL
∈O
Xtalk
Units
(Limits)
Limits (4) (5
Full Scale DAC Output
Total Harmonic Distortion
LM4934
Typical (3)
(6)
Output Power
DAC
Conditions
Loudspeaker; PO= 200mW
f = 1kHz
–84
dB
Headphone; PO= 10mW
f = 1kHz; SE
–85
dB
Headphone; PO= 10mW
f = 1kHz; OCL
–60
dB
CB = 2.2μF, CD6 = 0
35
ms
CB = 2.2μF, CD6 = 1
85
ms
All voltages are measured with respect to the GND pin unless otherwise specified.
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
Typicals are measured at 25°C and represent the parametric norm.
Limits are specified to Texas Instruments' AOQL (Average Outgoing Quality Level).
Datasheet min/max specification limits are specified by design, test, or statistical analysis.
Shutdown current is measured in a normal room environment.
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LM4934
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Audio Amplifier Electrical Characteristics AVDD = 5.0V, DVDD = 3.3V (1) (2)
The following specifications apply for the circuit shown in Figure 1 with all programmable gain set at 0dB, unless otherwise
specified. Limits apply for TA = 25°C.
Symbol
Parameter
Conditions
LM4934
Typical (3)
IDD
Supply Current
ISD
Shutdown Current
PO
VFS
DAC
THD+N
VOS
Offset Voltage
mA (max)
Headphone Mode Only
5.8
mA
Stereo Speaker Mode Only
17
mA
Mono Speaker Mode Only
7
mA
DAC Off, All Amps On
19
mA
1.6
μA
Speaker; THD = 1%;
f = 1kHz, 8Ω BTL
1.2
W
Headphone; THD = 1%;
f = 1kHz, 32Ω SE
80
Earpiece; THD = 1%;
f = 1kHz, 32Ω BTL
175
Vpp
0.03
%
Headphone; PO = 30mW;
f = 1kHz, 32Ω SE
0.01
%
Earpiece; PO = 40mW;
f = 1kHz, 32Ω BTL; CD4 = 0
0.04
%
Line Out; VO = 1Vrms; f = 1kHz, 10kΩ SE
0.003
%
Speaker
8
mV
Earpiece
8
mV
HP (OCL)
8
mV
A = weighted; 0dB gain;
See Table 1
See
Table 1
PSRR
Power Supply Rejection Ratio
f = 217Hz; Vripple = 200mVP-P
CB = 2.2μF; See Table 3
See
Table 3
TWU
(1)
(2)
(3)
(4)
(5)
(6)
6
Wake-Up Time
mW
2.4
Output Noise
Crosstalk
mW
Speaker; PO = 500mW;
f = 1kHz, 8Ω BTL
∈O
Xtalk
)
24
Full Scale DAC Output
Total Harmonic Distortion
Units
(Limits)
VIN = 0, No Load
All Amps On - DAC
(6)
Output Power
Limits (4) (5
Loudspeaker; PO= 400mW
f = 1kHz
–86
dB
Headphone; PO= 15mW
f = 1kHz; OCL
–56
dB
Headphone; PO= 15mW
f = 1kHz, SE
–80
dB
CB = 2.2μF, CD6 = 0
45
ms
CB = 2.2μF, CD6 = 1
130
ms
All voltages are measured with respect to the GND pin unless otherwise specified.
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
Typicals are measured at 25°C and represent the parametric norm.
Limits are specified to Texas Instruments' AOQL (Average Outgoing Quality Level).
Datasheet min/max specification limits are specified by design, test, or statistical analysis.
Shutdown current is measured in a normal room environment.
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LM4934
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SNAS343F – OCTOBER 2005 – REVISED APRIL 2013
Volume Control Electrical Characteristics (1) (2)
The following specifications apply for 3V ≤ AVDD ≤ 5V and 2.7V ≤ DVDD ≤ 4.0V, unless otherwise specified. Limits apply for TA
= 25°C.
Symbol
Parameter
Conditions
LM4934
Typical (3 Limits (4)
)
PGR
VCR
ΔACH-CH
minimum gain setting
–6
maximum gain setting
15
Stereo or Mono Analog Inputs
PreAmp Gain Setting Range
Output Volume Control for Stereo
Speakers, Headphone Output, or
Mono Output Range
minimum gain setting, Vol = 00001
maximum gain setting
Stereo Channel to Channel Gain
Mismatch
–56
5
Units
(Limits)
(5)
–6.5
dB (min)
–5.5
dB (max)
15.5
dB (max)
14.5
dB (min)
–56.5
dB (min)
–55.5
dB (max)
4.5
dB (min)
5.5
dB (max)
0.3
dB
Headphone