Overview
The TDA7303 is a digital controlled stereo audio processor designed by STMicroelectronics. It is tailored for high-quality audio applications in car radios, Hi-Fi systems, and portable audio devices. The processor integrates various audio control functions, including volume, tone (bass and treble), balance (left/right), and fader (front/rear) controls. It also features a loudness function and selectable input gain to adapt to different audio sources. Control of the TDA7303 is achieved through a serial I2C bus interface, allowing for precise and programmable control via a microprocessor.
The TDA7303 utilizes bipolar/CMOS technology, which ensures low distortion, low noise, and low DC stepping, making it an ideal choice for applications requiring high audio fidelity.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | 6 | 9 | 10 | V |
| Operating Temperature (Tamb) | -40 | 85 | °C | |
| Storage Temperature Range (Tstg) | -55 | 150 | °C | |
| Max. Input Signal Handling (VCL) | 2 | Vrms | ||
| Total Harmonic Distortion (THD) | 0.01 | % | ||
| Signal to Noise Ratio (S/N) | 106 | dB | ||
| Channel Separation (SC) | 103 | dB | ||
| Volume Control Steps | -78.75 | 0 | dB (1.25 dB steps) | |
| Bass and Treble Control Steps | -14 | +14 | dB (2 dB steps) | |
| Fader and Balance Control Steps | -38.75 | 0 | dB (1.25 dB steps) | |
| Input Gain Steps | 0 | 11.25 | dB (3.75 dB steps) | |
| Mute Attenuation | 100 | dB |
Key Features
- Input Multiplexer: 3 stereo inputs with selectable input gain for optimal adaptation to different sources.
- Loudness Function: External loudness function to enhance audio quality at lower volumes.
- Volume Control: Volume control in 1.25 dB steps.
- Treble and Bass Control: Independent treble and bass control in 2 dB steps.
- Speaker Attenuators: Four independent speaker attenuators in 1.25 dB steps for balance and fader facilities, with an independent mute function.
- I2C Bus Interface: All functions programmable via a serial I2C bus interface, allowing for microprocessor control.
Applications
The TDA7303 is designed for various high-quality audio applications, including:
- Car radios and automotive audio systems.
- Hi-Fi audio systems.
- Portable audio devices.
Q & A
- What is the TDA7303?
The TDA7303 is a digital controlled stereo audio processor designed for high-quality audio applications.
- What are the key features of the TDA7303?
Key features include input multiplexer, loudness function, volume control, treble and bass control, speaker attenuators, and I2C bus interface.
- How many stereo inputs does the TDA7303 have?
The TDA7303 has 3 stereo inputs with selectable input gain.
- What is the step resolution for volume control?
The volume control is in 1.25 dB steps.
- How is the TDA7303 controlled?
The TDA7303 is controlled via a serial I2C bus interface.
- What is the operating temperature range of the TDA7303?
The operating temperature range is from -40°C to 85°C.
- What is the maximum input signal handling of the TDA7303?
The maximum input signal handling is 2 Vrms.
- What is the signal to noise ratio of the TDA7303?
The signal to noise ratio is 106 dB.
- What are the applications of the TDA7303?
Applications include car radios, Hi-Fi systems, and portable audio devices.
- What technology is used in the TDA7303?
The TDA7303 uses bipolar/CMOS technology.
