TDA7319

Audio Special Purpose Overview

The TDA7319 is a digital controlled audio processor designed for car radio and Hi-Fi systems. It provides volume control, bass, middle, and treble tone adjustment via an I2C bus interface. The device features two independent volume controls with 1dB steps ranging from 0 to -47dB. Tone controls offer ±14dB range in 1dB increments. Electrical specifications include a supply voltage of 6V to 10.5V, a signal-to-noise ratio of 106dB, and total harmonic distortion of 0.08% at 1kHz. It operates within a temperature range of -40°C to 85°C.

Audio Special Purpose Feature Summary

• Digital control of volume, bass, middle, and treble via serial I2C bus
• Two independent volume controls with 1dB step resolution (-47dB to 0dB)
• Three-band tone control (bass, middle, treble) with ±14dB range
• High signal-to-noise ratio of 106dB and low total harmonic distortion

Audio Special Purpose Applications

• Car radio audio processing
• Hi-Fi system tone and volume control

Audio Special Purpose Procurement Notes

Verify component status as the TDA7319 is marked obsolete by STMicroelectronics. Confirm package availability (DIP20 or SO20) and check for RoHS compliance documentation. Ensure replacement components match the required 20-pin configuration and I2C interface compatibility before integration.

Audio Special Purpose Selection Notes

Select the DIP20 package for through-hole mounting or SO20 for surface mount applications. Verify that the host microcontroller supports the I2C protocol with appropriate pull-up resistors on SDA and SCL lines. Ensure the power supply maintains 6V to 10.5V to meet operational requirements.

Audio Special Purpose Part Context

The TDA7319 belongs to the TDA73xx series of audio processors from STMicroelectronics. It serves as a dedicated solution for multi-channel audio signal conditioning in automotive and consumer electronics. The device integrates analog filtering and digital control logic to manage audio parameters efficiently.

Audio Special Purpose Replacement Considerations

TDA7319D (SO20 package variant).

Audio Special Purpose FAQ

What is the maximum attenuation for the volume controls?

The maximum attenuation for both the first and second volume controls is -47dB.

How is the I2C bus interface configured?

The interface uses SDA and SCL lines with external pull-up resistors. Data transmission follows standard I2C protocols with acknowledge bits after each byte.

What is the typical output noise level?

The output noise is typically 5μV to 15μV across all gains with a flat frequency response from 20Hz to 20kHz.