OUTLINE:

Texas LM4811MMX/NOPB-Dual Audio Power Amplifier

22 May,2023
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LM4811MMX/NOPB

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 

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

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 

LM4811MMX/NOPB Package Outline

LM4811MMX/NOPB

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.

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