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LM49100 데이터시트 PDF




National Semiconductor에서 제조한 전자 부품 LM49100은 전자 산업 및 응용 분야에서
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PDF 형식의 LM49100 자료 제공

부품번호 LM49100 기능
기능 Mono Class AB Audio Subsystem
제조업체 National Semiconductor
로고 National Semiconductor 로고


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LM49100 데이터시트, 핀배열, 회로
www.DataSheet4U.com
June 2007
LM49100
Mono Class AB Audio Subsystem with a True-Ground
Headphone Amplifier
General Description
The LM49100 is a fully integrated audio subsystem capable
of delivering 1.275W of continuous average power into a
mono 8bridged-tied load (BTL) with 1% THD+N and with a
5V power supply. The LM49100 also has a stereo true-ground
headphone amplifier capable of 50mW per channel of con-
tinuous average power into a 32single-ended (SE) loads
with 1% THD+N.
The LM49100 has three input channels. One pair of SE inputs
can be used with a stereo signal. The other input channel is
fully differential and may be used with a mono input signal.
The LM49100 features a 32-step digital volume control and
ten distinct output modes. The mixer, volume control, and de-
vice mode select are controlled through an I2C compatible
interface.
Thermal overload protection prevent the device from being
damaged during fault conditions. Superior click and pop sup-
pression eliminates audible transients on power-up/down and
during shutdown.
Key Specifications
■ Power Output at VDD = 5V:
  Speaker:
  RL = 8Ω, THD+N 1%
  Headphone (VDDHP = 2.8V):
  RL = 32Ω, THD+N 1%
■ Shutdown current
1.275W
50mW
0.01µA
Features
Mono and stereo inputs
Thermal Overload Protection
True-ground Headphone Drivers
I2C Control Interface
Input mute attenuation
2nd Stage headphone attenuator
32-step digital volume control
10 Operating Modes
Minimum external components
Click and Pop suppression
Micro-power shutdown
Available in space-saving 3mm x 3mm 25 bump GR
package
RF Suppression
Applications
Mobile Phones
PDAs
Laptops
Portable Electronics
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2007 National Semiconductor Corporation 300015
www.national.com




LM49100 pdf, 반도체, 판매, 대치품
www.DataSheet4U.com
Bump Descriptions
Bump
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
D1
D2
D3
D4
D5
E1
E2
E3
E4
E5
Name
VDDCP
GNDCP
MIN+
BYPASS
RIN
C1N
C1P
MIN-
LIN
LS−
VSSCP
VSSHP
GND
ADDR
VDDLS
HPL
VDDHP
VDDI2C
SDA
LS+
HPR
VDDLS
AGND
GND
SCL
Description
Positive Charge Pump Power Supply
Charge Pump Ground
Positive Mono Input
Half-Supply Bypass
Right Input
Negative Terminal – Charge Pump Flying Capacitor
Positive Terminal – Charge Pump Flying Capacitor
Negative Mono Input
Left Input
Negative Loudspeaker Output
Negative Charge Pump Power Supply
Negative Headphone Power Supply
Ground
I2C Address Identification
Loudspeaker Power Supply
Left Headphone Output
Positive Headphone Power Supply
I2C Power Supply
I2C Data
Loudspeaker Output Positive
Right Headphone Output
Loudspeaker Power Supply
Headphone Signal Ground (See Application Information section).
Ground
I2C Clock
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LM49100 전자부품, 판매, 대치품
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Symbol
eN
TON
TOFF
ZIN
AV
CMRR
PSRR
PSRR
PSRR
PSRR
Parameter
Conditions
LM49100
Typical
(Note 6)
Limit
(Note 7)
Units
(Limits)
Headphone
Mode 2,10
12
µV
Mode 4, 7
13
µV
Noise
A-weighted, 0 dB, inputs
terminated to GND, output
referred
Mode 6, 14
Mode 1
16
Loudspeaker
14
µV
µV
Mode 3, 7, 10,
14
23
µV
Mode 5
27
µV
Turn-on Time
26 ms
Turn-off Time
1 ms
Input Impedance
Maximum gain setting
Maximum attenuation setting
12.5 k
110 k
Volume Control
Stereo (Left
and Right
Channels)
Mono
Input referred maximum
attenuation
Input referred maximum gain
Input referred maximum
attenuation
−54
18
−60
dB
dB
dB
Input referred maximum gain
12
dB
Headphone Mode 2, f = 217 Hz,
Common Mode Rejection Ratio VCM = 1 VPP,RL = 32Ω
Loudspeaker Mode 1, f = 217 Hz, VCM = 1 VPP,
RL = 8Ω
64
58
VRIPPLE = 200mVpp on VDD LS, Output referred, Inputs terminated to GND
LS, Mode 1
Power Supply Rejection Ratio
LS, Mode 3, 7, 10, 14
90
78
dB
dB
dB
dB
LS, Mode 5
77 dB
Power Supply Rejection Ratio VRIPPLE = 200mVpp on VDD HP, Output referred, Inputs terminated to GND
LS, Mode 7, 10, 14
83
dB
Power Supply Rejection Ratio
VRIPPLE = 200mVpp on VDD LS, Output referred, Inputs terminated to GND
HP, Mode 2, 10
90
HP, Mode 4, 7
88
dB
dB
HP, Mode 6, 14
87 dB
Power Supply Rejection Ratio
VRIPPLE = 200mVpp on VDD HP, Output referred, Inputs terminated to GND
HP, Mode 2, 10
83
HP, Mode 4, 7
83
dB
dB
HP, Mode 6, 14
80 dB
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