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LM4934 데이터시트 PDF




National Semiconductor에서 제조한 전자 부품 LM4934은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 LM4934 기능
기능 3D Audio Sub-System
제조업체 National Semiconductor
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LM4934 데이터시트, 핀배열, 회로
www.DataSheet4U.com
November 2005
LM4934
3D Audio Sub-System with Stereo Speaker, OCL/SE
Stereo Headphone, Earpiece and Mono Line Level
Outputs
General Description
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 8load, a stereo headphone amplifier de-
livering 36mW per channel into a 32load, a mono earpiece
amplifier delivering 55mW into a 32load, and a line output
for an external powered handsfree speaker. It integrates the
audio amplifiers, volume control, mixer, power management
control, and National 3D enhancement all into a single pack-
age. 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.
Boomer audio power amplifiers are designed specifically to
provide high quality output power with a minimal amount of
external components.
Key Specifications
j POUT, Stereo BTL, 8, 3.3V,
1% THD+N
j POUT HP, 32, 3.3V, 1% THD+N
j POUT Mono Earpiece, 32, 3.3V,
1% THD+N
j Shutdown current
j DAC SNR
520mW (typ)
36mW (typ)
55mW (typ)
0.6µA (typ)
95dB (typ)
Features
n 18-bit stereo DAC
n Multiple distinct output modes
n Stereo speaker amplifier
n Stereo headphone amplifier
n Mono earpiece amplifier
n Mono Line Output for external handsfree carkit
n Independent Left, Right, headphone and Mono speaker
volume controls
n National 3D enhancement with programmable effect
level
n I2C/SPI (selectable) compatible interface
n Ultra low shutdown current
n Click and Pop Suppression circuit
Applications
n Cell Phones
n PDAs
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2005 National Semiconductor Corporation DS201669
www.national.com




LM4934 pdf, 반도체, 판매, 대치품
Pin Descriptions (Continued)
D2 RIN
D3 NC
D4 BYPASS
D5 LINEOUT
D6 RHP
E1 EP-
E2 MIN
E3 LIN
E4 R3DOUT
E5 LHP
E6 CHP
F1 AGND
F2 EP+
F3 L3DIN
F4 L3DOUT
F5 R3DIN
F6 AGND
G1 LLS-
G2 AVDD
G3 LLS+
G4 RLS-
G5 AVDD
G6 RLS+
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
I
I
O
O
O
I
I
I
O
O
P
O
I
I
I
P
O
P
O
O
P
O
RIGHT ANALOG IN
NO CONNECT
HALF-SUPPLY BYPASS
MONO LINE OUT
RIGHT HEADPHONE OUTPUT
MONO EARPIECE OUT-
MONO ANALOG IN
LEFT ANALOG IN
RIGHT CHANNEL 3D OUTPUT
LEFT HEADPHONE OUTPUT
HEADPHONE CENTER PIN OUTPUT (1/2 VDD)
ANALOG GND
MONO EARPIECE OUT+
LEFT CHANNEL 3D INPUT
LEFT CHANNEL 3D OUTPUT
RIGHT CHANNEL 3D INPUT
ANALOG GND
LEFT SPEAKER OUT-
ANALOG SUPPLY VOLTAGE
LEFT SPEAKER OUT+
RIGHT SPEAKER OUT-
ANALOG SUPPLY VOLTAGE
RIGHT SPEAKER OUT+
www.national.com
4

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LM4934 전자부품, 판매, 대치품
Audio Amplifier Electrical Characteristics AVDD = 5.0V, DVDD = 3.3V (Notes 1,
2) (Continued)
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
Units
Typical Limits (Limits)
(Note 6) (Notes
7, 8)
PSRR Power Supply Rejection Ratio
Xtalk
Crosstalk
TWU
Wake-Up Time
f = 217Hz; Vripple = 200mVP-P
CB = 2.2µF; See Table 3
Loudspeaker; PO= 400mW
f = 1kHz
Headphone; PO= 15mW
f = 1kHz; OCL
Headphone; PO= 15mW
f = 1kHz, SE
CB = 2.2µF, CD6 = 0
CB = 2.2µF, CD6 = 1
Table 3
–86
–56
–80
45
130
dB
dB
dB
ms
ms
Volume Control Electrical Characteristics (Notes 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 Limits
(Note 6) (Notes
7, 8)
Units
(Limits)
PGR
VCR
ACH-CH
AMUTE
RINPUT
Stereo or Mono Analog Inputs
PreAmp Gain Setting Range
minimum gain setting
maximum gain setting
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
Mute Attenuation
MIN, LIN and RIN Input Impedance
Vin = 1Vrms, Gain = 0dB
with load, Vol = 00000
Headphone
Line Out
–6.5
dB (min)
–6
–5.5 dB (max)
15.5
dB (max)
15
14.5
dB (min)
–56.5 dB (min)
–56
–55.5 dB (max)
4.5 dB (min)
5
5.5 dB (max)
0.3 dB
<-90
dB
<-90
dB
18 k(min)
23
28 k(max)
7 www.national.com

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