Features: Eliminates headphone amplifier output coupling capacitors (patent pending)
Eliminates half-supply bypass capacitor (patent pending)
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 and SOIC packagesApplicationMobile Phones
PDAs
Portable eletronics devices
Portable MP3 playersSpecifications
| Power@ 16Ohms, 1% THD |
0.062 Watt |
| Power@ 32Ohms, 1% THD |
0.035 Watt |
| Power@ 16Ohms, 10% THD |
0.08 Watt |
| Power@ 32Ohms, 10% THD |
0.048 Watt |
| THD |
0.3 % |
| PSRR |
65 dB |
| SNR |
97 dB |
| Channels |
2 Channels |
| THD Conditions |
Po=30mW @ Vs=5V, R=32 ohms |
| PSRR Conditions |
f=217 Hz or 1kHz, input term. With 10 ohms to ground |
| SNR Conditions |
Po=.035W |
| User Supply |
3.3 Volt |
| Shutdown Type |
Low |
| Supply Range |
+2.2 - +5.5 V |
| Exposed DAP |
Yes |
| Capless Headphone |
Yes |
| Temperature Min |
-40 deg C |
| Temperature Max |
85 deg C |
| View Using Catalog |
If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Supply Voltage (Note 9) 6.0V
Storage Temperature −65˚C to +150˚C
Input Voltage -0.3V to VDD + 0.3V
Power Dissipation (Note 3) Internally Limited
ESD Susceptibility Pin 6 (Note 10) 10kV
ESD Susceptibility (Note 4) 2000V
ESD Susceptibility (Note 5) 200V
Junction Temperature 150˚C
Thermal Resistance
JC (MSOP) 56˚C/W
JA (MSOP) 190˚C/W
JC (SOP) 35˚C/W
JA (SOP) 150˚C/WDescriptionThe 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 3.3VDC power supply.
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 shutdown protection mechanism. The LM4910 is also unity-gain stable and can be configured by external gain-setting resistors.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM4910LQ |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
| LM4910LQX |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
| LM4910MA |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
| LM4910MAX |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LM4910MM |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
| LM4910MMX |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.For more information on Reliability Metrics, please click here.
More Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-1622: Application Note 1622 LM49100 Evaluation Board User's Guide |
1237 Kbytes |
19-Oct-07 |
Download |
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
LM4910 Data Sheet
