LM49101TM/NOPB National Semiconductor, LM49101TM/NOPB Datasheet

IC AUDIO SUBSYSTM 1.3W AB 25USMD

LM49101TM/NOPB

Manufacturer Part Number
LM49101TM/NOPB
Description
IC AUDIO SUBSYSTM 1.3W AB 25USMD
Manufacturer
National Semiconductor
Series
Boomer®, PowerWise®r
Type
Class ABr
Datasheet
1.LM49101TMNOPB.pdf (30 pages)

Specifications of LM49101TM/NOPB

Output Type
1-Channel (Mono) with Stereo Headphones
Max Output Power X Channels @ Load
1.3W x 1 @ 8 Ohm; 45mW x 2 @ 32 Ohm
Voltage - Supply
2.7 V ~ 5.5 V
Features
Depop, Differential Inputs, I²C, Shutdown, Thermal Protection, Volume Control
Mounting Type
Surface Mount
Package / Case
25-MicroSMD
Operational Class
Class-AB
Audio Amplifier Output Configuration
1-Channel Mono/2-Channel Stereo
Audio Amplifier Function
Headphone/Speaker
Single Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (typ)
3/5V
Power Supply Requirement
Triple
Rail/rail I/o Type
No
Power Supply Rejection Ratio
90dB
Single Supply Voltage (min)
Not RequiredV
Single Supply Voltage (max)
Not RequiredV
Dual Supply Voltage (min)
1.7/1.8/2.7V
Dual Supply Voltage (max)
2.9/5.5V
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
25
Package Type
uSMD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM49101TMTR
© 2009 National Semiconductor Corporation
Mono Class AB Audio Subsystem with a True Ground
Headphone Amplifier and Earpiece Switch
General Description
The LM49101 is a fully integrated audio subsystem with a
mono power amplifier capable of delivering 540mW of con-
tinuous average power into an 8Ω BTL speaker load with 1%
THD+N using a 3.3V supply. The LM49101 includes a sepa-
rate stereo headphone amplifier that can deliver 44mW per
channel into 32Ω loads using a 2.75V supply.
The LM49101 has four input channels. A pair of single-ended
inputs and a fully differential input channel with volume control
and amplification stages. Additionally, a bypass differential
input is available that connects directly to the mono speaker
outputs through an analog switch without any amplification or
volume control stages. The LM49101 features a 32–step dig-
ital volume control on the input stage and an 8–step digital
volume control on the headphone output stage.
The digital volume control and output modes, programmed
through a two-wire I
in routing and mixing audio channels.
The LM49101 is designed for cellular phones, PDAs, and
other portable handheld applications. The high level of inte-
gration minimizes external components. The True Ground
headphone amplifier eliminates the physically large DC block-
ing output capacitors reducing required board space and
reducing cost.
Key Specifications
Boomer® is a registered trademark of National Semiconductor Corporation.
■ 
■ 
■ 
■ 
  
  
V
Supply Voltage (V
Supply Voltage (V
I
Output power
1% THD+N
2
DD
C Supply Voltage
R
R
L
L
LS = 5V, V
= 8Ω speaker
= 32Ω headphone
DD
2
HP = 2.75V
C compatible interface, allows flexibility
DD
DD
LS)
HP)
1.8V
1.7V
2.7V
300862
≤
≤
≤
V
I
V
2
DD
CV
DD
45mW (typ)
1.3W (typ)
HP
LS
DD
≤
≤
≤
5.5V
2.9V
5.5V
LM49101
Features
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Applications
■
■
■
■ 
  
  
■ 
  
■ 
Differential mono input and stereo single-ended input
Separate earpiece (receiver) differential input
Analog switch for a separate earpiece path
32-step digital volume control (-80 to +18dB)
Three independent volume channels (Left, Right, Mono)
Separate headphone volume control
Flexible output for speaker and headphone output
True Ground headphone amplifier eliminates large DC
blocking capacitors reducing PCB space and cost.
Hardware reset function
RF immunity topology
“Click and Pop” suppression circuitry
Thermal shutdown protection
Micro-power shutdown
I
Available in space-saving microSMD package
Portable electronic devices
Mobile Phones
PDAs
V
1% THD+N
V
Output Power
PSRR:
Shutdown power supply current
2
C control interface
DD
DD
R
R
L
L
LS = 3.3V, V
= 3.3V, 217Hz ripple, Mono In
= 8Ω speaker
= 32Ω headphone
DD
HP = 2.75V
March 23, 2009
www.national.com
0.01μA (typ)
40mW (typ)
540W (typ)
90dB (typ)

Related parts for LM49101TM/NOPB

Image
Part Number
Description
Manufacturer
Datasheet
Request R
MC1408P8
Part Number:
MC1408P8
Description:
National Semiconductor [8-Bit D/A Converter]
Manufacturer:
National Semiconductor
Datasheet:
MC1408P8.pdf (12 pages)
CS1301
Part Number:
CS1301
Description:
National Semiconductor [Media Coprocessor]
Manufacturer:
National Semiconductor
Datasheet:
CS1301.pdf (25 pages)
LM4832N
Part Number:
LM4832N
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
LM4832N.pdf (23 pages)
LM4832M
Part Number:
LM4832M
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
LM4832M.pdf (23 pages)
LM4546
Part Number:
LM4546
Description:
AC97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound
Manufacturer:
National Semiconductor
LP2981AIM5X-2.7
Part Number:
LP2981AIM5X-2.7
Description:
Manufacturer:
National Semiconductor
Datasheet:
LP2981AIM5X-2.7.pdf (16 pages)
LP2988AIMMX-3.8
Part Number:
LP2988AIMMX-3.8
Description:
Manufacturer:
National Semiconductor
LP3988IMFX-2.6
Part Number:
LP3988IMFX-2.6
Description:
Manufacturer:
National Semiconductor
Datasheet:
LP3988IMFX-2.6.pdf (11 pages)
LPV321M7X
Part Number:
LPV321M7X
Description:
General Purpose, Low Voltage, Low Power, Rail-to-Rail Output Operational Amplifiers
Manufacturer:
National Semiconductor
Datasheet:
LPV321M7X.pdf (21 pages)
ADC0882CCN
Part Number:
ADC0882CCN
Description:
8-bit 20 MSPS flash A/D converter.
Manufacturer:
National Semiconductor
Datasheet:
ADC0882CCN.pdf (11 pages)
LM837N
Part Number:
LM837N
Description:
Low Noise Quad Operational Amplifier
Manufacturer:
National Semiconductor
Datasheet:
LM837N.pdf (8 pages)
DS3650J
Part Number:
DS3650J
Description:
Quad Differential Line Receivers
Manufacturer:
National Semiconductor
Datasheet:
DS3650J.pdf (8 pages)
DS3662J
Part Number:
DS3662J
Description:
Quad High Speed Trapezoidal? Bus Transceiver
Manufacturer:
National Semiconductor
Datasheet:
DS3662J.pdf (6 pages)
DS7820A
Part Number:
DS7820A
Description:
Dual Line Receiver
Manufacturer:
National Semiconductor
Datasheet:
DS7820A.pdf (8 pages)
DP8481J
Part Number:
DP8481J
Description:
TTL to 10k ECL Level Translator with Latch
Manufacturer:
National Semiconductor
Datasheet:
DP8481J.pdf (6 pages)

LM49101TM/NOPB Summary of contents

Page 1

... Output power    5V 2.75V DD DD    1% THD+N = 8Ω speaker 32Ω headphone R L Boomer® registered trademark of National Semiconductor Corporation. © 2009 National Semiconductor Corporation LM49101 ■  Output Power    3.3V    1% THD+N = 8Ω speaker 32Ω headphone ...

Page 2

Typical Application www.national.com FIGURE 1. Typical Audio Application Circuit 2 30086203 ...

Page 3

Connection Diagrams 25 Bump micro SMD Package Top View (Bump Side Down) Order Number LM49101TM, LM49101TMX See NS Package Number TMD25BCA Ordering Information Order Package Package DWG Number 25 Bump micro LM49101TM TMD25BCA SMD 25 Bump micro LM49101TMX TMD25BCA SMD ...

Page 4

Bump Descriptions Bump Name A1 CPGND Charge pump ground terminal Negative charge pump power supply SS A3 HPR Right headphone output Headphone amplifier power supply DD A5 MIN+ Positive input pin for the mono, ...

Page 5

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (Loudspeaker, V LS) DD Supply Voltage (Headphone, V HP) DD Storage Temperature Voltage at Any Input Pin GND − 0 Power Dissipation (Note 3) ESD Rating (Note 4) ...

Page 6

Symbol Parameter THD+N Total Harmonic Distortion + Noise SNR Signal-to-Noise Ratio PSRR Power Supply Rejection Ratio CMRR Common-Mode Rejection Ratio X Crosstalk TALK Z MIN, LIN, and RIN Input Impedance Resistance ON VOL Digital Volume Control Range ...

Page 7

Electrical Characteristics V The following specifications apply for V specified Loudspeaker Headphone Earpiece. Symbol Parameter I Quiescent Power Supply Current DD I Shutdown Current SD V Output Offset Voltage OS P Output Power O ...

Page 8

Symbol Parameter CMRR Common-Mode Rejection Ratio X Crosstalk TALK Z MIN, LIN, and RIN Input Impedance Resistance ON VOL Digital Volume Control Range VOL Volume Control Step Size Error T Wake-Up Time from Shutdown WU www.national.com Conditions ...

Page 9

Interface 2. C_V The following specifications apply for V Symbol Parameter Clock Period Data Setup Time Data Stable Time 3 ...

Page 10

Typical Performance Characteristics THD+N vs Frequency = 8Ω BTL 3.3V Mode 1 (Mono), 80kHz BW THD+N vs Frequency 3.3V 1.8V 5mW/Ch, Mode ...

Page 11

THD+N vs Frequency = 8Ω BTL 5V Mode 1 (Mono), 80kHz BW THD+N vs Frequency 5V 2.75V 20mW/Ch, Mode 4 (Mono), ...

Page 12

THD+N vs Output Power 3.3V & 5V 1kHz Mode 1 (Mono), 80kHz BW THD+N vs Output Power 3.3V 1.8V & 2.75V 1kHz ...

Page 13

PSRR vs Frequency 3.3V 200mV , R DD RIPPLE PP Mode 1 (Mono), 80kHz BW PSRR vs Frequency 5V 200mV , R DD RIPPLE PP Mode 1 (Mono), ...

Page 14

PSRR vs Frequency 3.3V 2.75V 32Ω SE, Mode 4 (Mono), 80kHz Power Dissipation vs Output Power 3.3V & 5V 2.75V, R ...

Page 15

Supply Current vs Supply Voltage ( 2.75V, No Load, Gain_SD = 0 & (EP_Mode & 1, Mode 1 Supply Current vs Supply Voltage ( 3.3V, No Load, Gain_SD = ...

Page 16

Application Information COMPATIBLE INTERFACE The LM49101 is controlled through an I interface that consists of a serial data line (SDA) and a serial clock (SCL). The clock line is uni-directional. The data line is bi-directional (open drain). ...

Page 17

A7 A6 Chip 1 1 Address Register D7 D6 General Control 0 0 Output Mode Control 0 1 Bypass Output Gain Control 1 0 Mono Input Volume 1 0 Control Left Input Volume 1 1 Control Right Input Volume 1 ...

Page 18

Bit Name 0 Power_On 1 Turn_On_Time 3 LS (EP Mode) 4 GAMP_SD www.national.com TABLE 3. General Control Register Value This bit is a master shutdown control bit and sets the device off. Value 0 Master power ...

Page 19

TABLE 4. Output Mode Control Register (see key below table) Bits Field 3:0 Mode_Control These bits determine how the input signals are mixed and routed to the outputs Mode 0000 0001 0010 ...

Page 20

Bits Field 2:0 HP_GAIN 3 LS_GAIN 4 INPUT MUTE www.national.com TABLE 5. Output Gain Control Register Description These bits set the gain of the headphone output amplifiers. Value 000 001 010 011 100 101 110 111 This bit sets the ...

Page 21

TABLE 6. Input Volume Control Registers Bits Fields 4:0 Mono_Vol These bits set the input volume for each input volume register listed. Right_Vol Left_Vol Description Volume Step Value 1 00000 2 00001 3 00010 4 00011 5 00100 6 00101 ...

Page 22

HW RESET FUNCTION The LM49101 can be globally reset without using the I trols. When the HW RESET pin is set to a logic low the LM49101 will enter into shutdown, the mode control bits of the Output Mode Control ...

Page 23

DIFFERENTIAL AMPLIFIER EXPLANATION The LM49101 features a differential input stage, which offers improved noise rejection compared to a single-ended input amplifier. Because a differential input amplifier amplifies the difference between the two input signals, any component common to both signals ...

Page 24

Capacitors with a tolerance of 10% or better are recommend- ed for impedance matching and improved CMRR and PSRR. CHARGE PUMP FLYING CAPACITOR (C The flying capacitor (C ), see Figure 1, affects the load regu- 1 lation and output ...

Page 25

Demo Board Circuit Demonstration Board The demonstration board (see Figure 5) has connection and jumper options to be powered partially from the USB bus or from external power supplies. Additional options are to power the logic and ...

Page 26

LM49101 microSMD Demo Board Views Composite View Top Layer Internal Layer 2 www.national.com 30086209 30086206 30086207 26 30086205 Silk Screen 30086208 Internal Layer 1 30086210 Bottom Layer ...

Page 27

LM49101 Reference Demo Board Bill Of Materials Designator Vlaue Tolerance 5.1kΩ 10Ω 100kΩ IN1 IN2 1μF 10 IN3 IN4 ...

Page 28

Revision History Rev Date 0.01 10/18/08 www.national.com Description Initial released. 28 ...

Page 29

Physical Dimensions inches (millimeters) unless otherwise noted X = 2.040±0.030mm Bump micro SMD Package NS Package Number TMD25BCA = 2.066±0.030mm 0.600±0.075mm www.national.com ...

Page 30

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

Related keywords