LM4910MM/NOPB National Semiconductor, LM4910MM/NOPB Datasheet

IC AMP AUDIO PWR .035W AB 8MSOP

LM4910MM/NOPB

Manufacturer Part Number
LM4910MM/NOPB
Description
IC AMP AUDIO PWR .035W AB 8MSOP
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet
1.LM4910MMNOPB.pdf (22 pages)

Specifications of LM4910MM/NOPB

Output Type
Headphones, 2-Channel (Stereo)
Max Output Power X Channels @ Load
35mW x 2 @ 32 Ohm
Voltage - Supply
2.2 V ~ 5.5 V
Features
Depop, Shutdown, Thermal Protection
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM4910MM
LM4910MMTR
© 2007 National Semiconductor Corporation
LM4910
Output Capacitor-less Stereo 35mW Headphone Amplifier
General Description
The LM4910 is an audio power amplifier primarily designed
for headphone applications in portable device applications. It
is capable of delivering 35mW of continuous average power
to a 32Ω load with less than 1% distortion (THD+N) from a
3.3V
The LM4910 utilizes a new circuit topology that eliminates
output coupling capacitors and half-supply bypass capacitors.
The LM4910 contains advanced pop & click circuitry which
eliminates noises caused by transients that would otherwise
occur during turn-on and turn-off.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. Since the LM4910 does not require any
output coupling capacitors, half-supply bypass capacitors, or
bootstrap capacitors, it is ideally suited for low-power portable
applications where minimal space and power consumption
are primary requirements.
The LM4910 features a low-power consumption shutdown
mode, activated by driving the shutdown pin with logic low.
Additionally, the LM4910 features an internal thermal shut-
down protection mechanism. The LM4910 is also unity-gain
stable and can be configured by external gain-setting resis-
tors.
Typical Application
Boomer
DC
®
is a registered trademark of National Semiconductor Corporation.
power supply.
FIGURE 1. Typical Audio Amplifier Application Circuit
200305
Key Specifications
■
■
■
Features
■
■
■
■
■
■
■
Applications
■
■
■
■
PSRR at f = 217Hz
Power Output at V
THD
Shutdown Current
Eliminates headphone amplifier output coupling
capacitors
Eliminates half-supply bypass capacitor
Advanced pop & click circuitry eliminates noises during
turn-on and turn-off
Ultra-low current shutdown mode
Unity-gain stable
2.2V - 5.5V operation
Available in space-saving MSOP, LLP, and SOIC
packages
Mobile Phones
PDAs
Portable electronics devices
Portable MP3 players
≤
1%
DD
= 3.3V, R
20030565
L
= 32Ω, and
www.national.com
January 2007
0.1µA (typ)
65dB (typ)
35mW
(typ)

Related parts for LM4910MM/NOPB

Image
Part Number
Description
Manufacturer
Datasheet
Request R
LM4910MM
Part Number:
LM4910MM
Description:
Manufacturer:
National Semiconductor
Datasheet:
LM4910MM.pdf (22 pages)
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)

LM4910MM/NOPB Summary of contents

Page 1

... The LM4910 is also unity-gain stable and can be configured by external gain-setting resis- tors. Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit Boomer ® registered trademark of National Semiconductor Corporation. © 2007 National Semiconductor Corporation Key Specifications ■ PSRR 217Hz ■ Power Output at V ≤ ...

Page 2

Connection Diagrams www.national.com MSOP/SO Package 20030502 Top View Order Number LM4910MM or LM4910MA See NS Package Number MUA08A or M08A MSOP Marking 20030566 Top View G - Boomer Family C2 - LM4910MM SO Marking 20030567 Top View TT - Die ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (Note 9) Storage Temperature Input Voltage Power Dissipation (Note 3) ESD Susceptibility Pin 6 (Note 10) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Junction Temperature ...

Page 4

Electrical Characteristics V The following specifications apply for V Symbol Parameter I Quiescent Power Supply Current DD I Standby Current SD V Output Offset Voltage OS P Output Power O THD+N Total Harmonic Distortion + Noise P PSRR Power Supply ...

Page 5

Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Frequency THD+N vs Frequency 20030506 THD+N vs Frequency 20030508 THD+N vs Frequency 20030510 5 20030507 20030509 20030511 www.national.com ...

Page 6

THD+N vs Output Power THD+N vs Output Power THD+N vs Output Power www.national.com THD+N vs Output Power 20030516 THD+N vs Output Power 20030515 THD+N vs Output Power 20030519 6 20030517 20030518 20030520 ...

Page 7

Output Power vs Load Resistance 20030523 Output Power vs Load Resistance 20030579 Output Power vs Supply Voltage 20030581 Output Power vs Load Resistance Output Power vs Supply Voltage Power Dissipation vs Output Power 7 20030578 20030580 20030530 www.national.com ...

Page 8

Power Dissipation vs Output Power Channel Separation Power Supply Rejection Ratio www.national.com Power Dissipation vs Output Power 20030582 Power Supply Rejection Ratio 20030583 Power Supply Rejection Ratio 20030584 8 20030529 20030535 20030585 ...

Page 9

Open Loop Frequency Response Frequency Response vs Input Capacitor Size 20030588 Noise Floor 20030586 Supply Current vs Supply Voltage 9 20030587 20030589 www.national.com ...

Page 10

Application Information ELIMINATING OUTPUT COUPLING CAPACITORS Typical single-supply audio amplifiers that drive single-ended (SE) headphones use a coupling capacitor on each SE out- put. This output coupling capacitor blocks the half-supply voltage to which the output amplifiers are typically biased ...

Page 11

POWER SUPPLY BYPASSING As with any amplifier, proper supply bypassing is important for low noise performance and high power supply rejection. The capacitor location on the power supply pins should be as close to the device as possible. Typical applications ...

Page 12

The gain variation for both response limits is 0.17dB, well within the ±0.25dB ...

Page 13

FIGURE 4. The PCDN042 provides additional ESD protection beyond the 10kV shown in the Absolute Maximum Ratings 20030594 for the V 3 output o Output Noise vs R SERIES 20030590 FIGURE 5. 13 www.national.com ...

Page 14

HIGHER GAIN AUDIO AMPLIFIER www.national.com Output Power vs R SERIES 20030591 FIGURE 6. FIGURE 7. 14 20030593 ...

Page 15

The LM4910 is unity-gain stable and requires no external components besides gain-setting resistors, input coupling ca- pacitors, and proper supply bypassing in the typical applica- tion. However very large closed-loop differential gain is required, a feedback capacitor (C ...

Page 16

LM4910 SO DEMO BOARD ARTWORK Composite View Top Layer www.national.com Silk Screen 20030570 Bottom Layer 20030572 16 20030571 20030573 ...

Page 17

LM4910 MSOP DEMO BOARD ARTWORK Composite View Top Layer Silk Screen 20030574 Bottom Layer 20030576 17 20030575 20030577 www.national.com ...

Page 18

LM4910 LLP DEMO BOARD ARTWORK Composite View Top Layer www.national.com Silk Screen 20030597 Bottom Layer 20030599 18 20030598 20030596 ...

Page 19

LM4910 Reference Design Boards Bill of Materials Part Description LM4910 Mono Reference Design Board LM4910 Audio AMP Tantalum Cap 1µF 16V 10 Ceramic Cap 0.39µF 50V Z50 20 Resistor 20kΩ 1/10W 5 Resistor 100kΩ 1/10W 5 Jumper Header Vertical Mount ...

Page 20

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted MSOP Order Number LM4910MM NS Package Number MUA08A SO Order Number LM4910MA NS Package Number M08A 20 ...

Page 21

LQ Order Number LM4910LQ NS Package Number LQB08A 21 www.national.com ...

Page 22

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

Related keywords