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부품번호 | LM49100 기능 |
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기능 | Mono Class AB Audio Subsystem | ||
제조업체 | National Semiconductor | ||
로고 | |||
전체 24 페이지수
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 8Ω bridged-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 32Ω single-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
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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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 kΩ
110 kΩ
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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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |