Overview
The TDA2822 is a dual low-voltage power amplifier integrated circuit (IC) manufactured by STMicroelectronics. This versatile chip is widely used in portable audio devices, radios, headphone amplifiers, small stereo systems, and other low-power audio applications. It is designed to operate on a wide supply voltage range, making it suitable for battery-powered devices. The TDA2822 features low crossover distortion, low noise, thermal protection, and short-circuit protection, ensuring reliable performance in various audio amplification tasks.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 1.8V to 15V | V |
| Quiescent Current (per channel) | 4mA (typical) | mA |
| Output Power (9V, 4Ω load) | 1.4W | W |
| Total Harmonic Distortion (1kHz, 0.5W) | 0.5% (typical) | % |
| Input Impedance | 100kΩ | Ω |
| Gain | 40dB (typical) | dB |
| Noise Voltage | 200μV (typical) | μV |
| Channel Separation | 70dB (typical) | dB |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package | 8-pin Dual Inline Package (DIP) or surface-mount (SMD) package |
Key Features
- Dual Channel Amplification: The TDA2822 contains two independent amplifier channels, enabling stereo sound reproduction.
- Wide Supply Voltage Range: The IC can operate on a supply voltage ranging from 1.8V to 15V, making it compatible with various battery configurations and power supplies.
- Low Quiescent Current: The TDA2822 consumes very little current when no signal is present, typically around 4mA per channel, which helps extend battery life in portable devices.
- High Output Power: Despite its small size, the TDA2822 can deliver a maximum output power of 1.4W per channel into a 4Ω load when powered by a 9V supply.
- Low Distortion: The chip exhibits low total harmonic distortion (THD), typically less than 0.5% at 1kHz and 0.5W output power.
- Bridge-Tied Load (BTL) Capability: It can be configured in the Bridge-Tied Load mode to increase the output power, allowing it to drive certain speaker configurations with higher efficiency.
- Thermal and Short-Circuit Protection: It includes built-in thermal and short-circuit protection to ensure its safe operation and protect against damage in case of overheating or a short circuit.
Applications
- Portable Audio Devices: The TDA2822 is widely used in portable cassette players, radios, and CD players due to its low power consumption and compact size.
- Headphone Amplifiers: It is suitable for driving headphones and small speakers in various audio applications.
- Small Stereo Systems: The IC is used in small stereo systems and other low-power audio applications where energy efficiency and performance are crucial.
- Intercom Systems and Radios: The TDA2822 is also used in intercom systems and radios due to its reliable performance and low distortion.
Q & A
- What is the supply voltage range of the TDA2822?
The TDA2822 operates on a supply voltage range from 1.8V to 15V.
- What is the typical quiescent current per channel of the TDA2822?
The typical quiescent current per channel is around 4mA.
- What is the maximum output power of the TDA2822 per channel into a 4Ω load at 9V supply?
The maximum output power is 1.4W per channel into a 4Ω load at 9V supply.
- Does the TDA2822 support Bridge-Tied Load (BTL) configuration?
Yes, the TDA2822 can be configured in the Bridge-Tied Load mode to increase the output power.
- What kind of protection does the TDA2822 have?
The TDA2822 includes built-in thermal and short-circuit protection.
- What is the typical total harmonic distortion (THD) of the TDA2822 at 1kHz and 0.5W output power?
The typical THD is less than 0.5% at 1kHz and 0.5W output power.
- What are the common applications of the TDA2822?
The TDA2822 is commonly used in portable audio devices, headphone amplifiers, small stereo systems, and intercom systems.
- What is the operating temperature range of the TDA2822?
The operating temperature range is -40°C to +85°C.
- What types of packages are available for the TDA2822?
The TDA2822 is available in 8-pin Dual Inline Package (DIP) and surface-mount (SMD) packages.
- What is the input impedance of the TDA2822?
The input impedance is 100kΩ.
