LM4811MMX/NOPB Description
The LM4811 is a dual audio power amplifier capable of delivering 105mW per channel of continuous average power into a 16Ω load with 0.1% (THD+N) from a 5V power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4811 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems.
The LM4811 features a digital volume control that sets the amplifier's gain from +12dB to −33dB in 16 discrete steps using a two−wire interface.
The unity-gain stable LM4811 also features an externally controlled, active-high, micropower consumption shutdown mode. It also has an internal thermal shutdown protection mechanism.
LM4811MMX/NOPB Connection Diagram
LM4811MMX/NOPB Features
Digital Volume Control Range from +12dB to −33dB
WSON and VSSOP Surface Mount Packaging
"Click and Pop" Suppression Circuitry
No Bootstrap Capacitors Required
Low Shutdown Current
LM4811MMX/NOPB Typical Application
LM4811MMX/NOPB Application Information
The LM4811's gain is controlled by the signals applied to the CLOCK and UP/DN inputs. An external clock is required to drive the CLOCK pin. At each rising edge of the clock signal, the gain will either increase or decrease by a 3dB step depending on the logic voltage level applied to the UP/DN pin. A logic high voltage level applied to the UP/DN pin causes the gain to increase by 3dB at each rising edge of the clock signal. Conversely, a logic low voltage level applied to the UP/DN pin causes the gain to decrease 3dB at each rising edge of the clock signal. For both the CLOCK and UP/DN inputs, the trigger point is 1.4V minimum for a logic high level, and 0.4V maximum for a logic low level.
There are 16 discrete gain settings ranging from +12dB maximum to −33dB minimum. Upon device power on, the amplifier's gain is set to a default value of 0dB. However, when coming out of shutdown mode, the LM4811 will revert back to its previous gain setting.
The LM4811's CLOCK and UP/DN pins should be debounced in order to avoid unwanted state changes during transitions between VIL and VIH. This will ensure correct operation of the digital volume control. A microcontroller or microprocessor output is recommended to drive the CLOCK and UP/DN pins.
LM4811MMX/NOPB Package Outline
LM4811MMX/NOPB Product Parameter
|
Manufacturer |
Texas |
Manufacturer's Part # |
LM4811MMX/NOPB |
|
Categories |
Integrated Circuits (ICs) |
Sub-Categories |
Linear - Amplifiers - Audio |
|
Series |
Boomer® |
Part Status |
Active |
|
Type |
Class AB |
Output Type |
Headphones, 2-Channel (Stereo) |
|
Max Output Power x Channels @ Load |
105mW x 2 @ 16 Ω |
Voltage - Supply |
2V~5.5V |
|
Features |
Depop, Shutdown, Thermal Protection, Volume Control |
Mounting Type |
Surface Mount |
|
Operating Temperature |
-40°C~85°C TA |
Supplier Device Package |
10-VSSOP |
|
Package / Case |
10-TFSOP, 10-MSOP (0.118, 3.00mm Width) |
Mount |
Surface Mount |
|
Number of Pins |
10 |
Packaging |
Tape & Reel (TR) |
|
Feature |
Depop, Shutdown, Thermal Protection, Volume Control |
Number of Terminations |
10 |
|
Terminal Finish |
Matte Tin (Sn) |
Subcategory |
Audio/Video Amplifiers |
|
Terminal Position |
DUAL |
Terminal Form |
GULL WING |
|
Peak Reflow Temperature (Cel) |
260 |
Number of Functions |
1 |
|
Terminal Pitch |
0.5mm |
Base Part Number |
LM4811 |
|
Nominal Supply Current |
3mA |
Output Power |
105mW |
|
Supply Type |
Single |
Power Supply Rejection Ratio (PSRR) |
60dB |
|
Max Output Power |
105mW |
Length |
3mm |
|
Width |
3mm |
Radiation Hardening |
No |
|
RoHS Status |
ROHS3 Compliant |
Lead Free |
Lead Free |
|
Factory Lead Time |
6 Weeks |
Lifecycle Status |
ACTIVE (Last Updated: 4 days ago) |
|
Pbfree Code |
yes |
Supply Voltage-Max (Vsup) |
5.5V |
|
Number of Channels |
2 |
Height |
1.07mm |
|
Thickness |
1.02mm |
Supply Voltage-Min (Vsup) |
2V |
|
Pin Count |
10 |
|
|
LM4811MMX/NOPB Manufacturer
Texas Instruments is a semiconductor multinational company in Texas, USA. It is famous for developing, manufacturing, and selling semiconductor and computer technology. It is mainly engaged in innovative digital signal processing and analog circuits. In addition to the semiconductor business, it also provides solutions including sensing and control, educational products and digital light source processing. Texas Instruments (TI) is headquartered in Dallas, Texas, USA, and has manufacturing, design or sales organizations in more than 25 countries.
