Overview
The TDA7439, manufactured by STMicroelectronics, is a three-band digitally-controlled audio processor designed for high-quality audio applications in car-radio and Hi-Fi systems. This IC provides comprehensive control over volume, tone (bass, middle, and treble), and balance (left/right) functions. It features selectable input gain, making it adaptable to different audio sources. The processor uses bipolar/CMOS technology to achieve low distortion, low noise, and precise DC stepping.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | 6 | 9 | 10.2 | V |
| Max. Input Signal Handling (VCL) | 2 | Vrms | ||
| Total Harmonic Distortion (THD) | 0.01 | 0.1 | % | |
| Signal to Noise Ratio (S/N) | 106 | dB | ||
| Channel Separation (SC) | 90 | dB | ||
| Input Gain | 0 | 30 | dB (2dB step) | |
| Volume Control | -47 | 0 | dB (1dB step) | |
| Treble Control | -14 | +14 | dB (2dB step) | |
| Middle Control | -14 | +14 | dB (2dB step) | |
| Bass Control | -14 | +14 | dB (2dB step) | |
| Balance Control | -79 | 0 | dB (1dB step) | |
| Mute Attenuation | 100 | dB | ||
| Number of Channels | 2 | |||
| Interface | I²C | |||
| Operating Temperature | 0°C | 70°C (TA) | ||
| Package / Case | 30-SDIP (0.400", 10.16mm) |
Key Features
- Three-band tone control (bass, middle, and treble) in 2.0dB steps.
- Volume control in 1.0dB steps with a range of 0 to -47dB (mute).
- Balance control (left/right) in 1.0dB steps with a range of -79 to 0dB.
- Selectable input gain for optimal adaptation to different sources.
- Four stereo input multiplexers and one stereo output.
- Two independent speaker attenuators with mute function.
- All functions are programmable via an I²C serial bus interface.
- Low distortion, low noise, and precise DC stepping due to bipolar/CMOS technology.
Applications
The TDA7439 is designed for use in various high-quality audio applications, including:
- Automotive audio systems.
- Consumer audio systems such as Hi-Fi equipment.
Q & A
- What is the primary function of the TDA7439?
The TDA7439 is a three-band digitally-controlled audio processor that provides control over volume, tone (bass, middle, and treble), and balance (left/right) functions. - What are the key control features of the TDA7439?
The IC features volume control in 1.0dB steps, tone control in 2.0dB steps, and balance control in 1.0dB steps. - What is the supply voltage range for the TDA7439?
The supply voltage range is from 6V to 10.2V. - What is the operating temperature range for the TDA7439?
The operating temperature range is from 0°C to 70°C. - How many channels does the TDA7439 support?
The TDA7439 supports 2 channels. - What interface does the TDA7439 use for control?
The TDA7439 uses an I²C serial bus interface for control. - What types of audio applications is the TDA7439 suited for?
The TDA7439 is suited for automotive audio and consumer audio applications such as Hi-Fi systems. - Does the TDA7439 have a mute function?
Yes, the TDA7439 has a mute function with an attenuation of 100dB. - How many stereo inputs does the TDA7439 have?
The TDA7439 has four stereo input multiplexers. - What is the package type of the TDA7439?
The TDA7439 comes in a 30-SDIP (0.400", 10.16mm) package.
