TDA2822 Amplifier Circuit

Introduction

This IC can be seen on Television, radio, and other electronic devices like radar. Guitar and keyboard instruments also use this small audio amplifier circuit. So in this circuit, I am going to give an idea about the TDA2822 amplifier circuit and its working information.

The role of the amplifier circuit is very important. The Amplifier From its name it’s clear that it will amplify the input audio signals. The major aspect of this audio amplifier circuit is to increase the amplitude of the signal wave without Changing any other parameters.

The TDA2822M is an 8-pin monolithic integrated circuit and comes with a mini dip package. This is the best IC for making a  stereo amplifier circuit with a minimum number of components. Users can replace the TDA2822 IC with NJM2073D and both work the same. ” The power output of this single-chip IC is about 3.2 watts at the load impedance of 8 ohms speakers.”

TDA2822 Low power Audio Amplifier IC

Low power output stereo audio amplifier IC, best for the mini audio amplifier project and headphone amplifiers. The IC consists of two amplifiers (op-amp) on it so we can directly provide the audio input to the 2 audio input pins. The input bias current is about 0.1uA.

Pinout

Pin Number	Pin Name	Description
1 and 3	Ouptpt	Amplifier audio output
5 and 8	IN-	Inverting input, commonly connected with ground
6 and 7	IN+	Non inverting input, connecting audio signals
4	Gnd	Ground connection
2	Vcc	Positive supply input

The working voltage of this audio amplifier is about 3 to 5v DC supply, So you can use a 3v battery or 5v regulated power supply from the mp3 module board. The IC has low cross over distortion (The distortion caused by switching). Use a well filtered DC source for this audio amplifier circuit to work perfectly without any distortion in the output signal.

Circuit Diagram

Components Required

S.No	Component	Quantity
1	TDA2822 IC	1
2	10K resistor	2
3	4.7ohms resistor	2
4	100uf capacitor	3
6	470uf capacitor	2
7	0.1uf non polar capacitor	2

Working of TDA2822 Amplifier Circuit

The Left and right audio signals connected to the pin number 7 and 6, The input is grounded using a 10K ohm resistor to reduce the input distortion. The Inverting input of the IC is pin number 8 and 5 grounded using a 100uf/16v electrolytic capacitor. 

While providing the 3v DC to the pin number 2 then the amplifier turns on and the input signal will be amplified and providing the output at the pin number 1 and 3. Both outputs are taken out using a 470uf electrolytic capacitor. Connect the 8 ohm 1 watt to 3 watt speaker to enjoy the music.

FAQ