TDA7715

Overview

The TDA7715 is a fully integrated 3-band car audio processor designed for high-performance signal processing in automotive radio applications. It features an I2C interface and operates within a supply voltage range of 7.5V to 12.5V, with an operating temperature range of -40°C to 85°C (TA). The device provides comprehensive audio control including loudness, bass, middle, and treble filters, along with soft-step volume and mute functions. It includes input multiplexing for quasi-differential and single-ended stereo inputs, six line-driver outputs for external amplifiers, and four dedicated outputs for internal power amplifiers.

Feature Summary

• Fully integrated 3-band audio processor with programmable bass, middle, and treble filters featuring soft-step control.
• Input multiplexer supporting QD0-QD3 quasi-differential and SE0-SE4 single-ended stereo inputs.
• Six 3.55 V RMS line-driver outputs for external amplifiers and four dedicated outputs for onboard power amplifiers.
• Built-in spectrum analyzer with 7-band band-pass filters and DC offset detection circuit for amplifier diagnosis.

Applications

• Car radio pre-amplifier systems
• Automotive head units requiring digital audio processing
• External remote power amplifier interfaces

Procurement Notes

Verify the specific order code against the manufacturer's current production status, as automotive ICs may undergo lifecycle changes. Confirm package compatibility with the LQFP64 form factor and ensure design adherence to the specified 7.5V to 12.5V supply voltage limits. Check for any recent product change notices regarding pin definitions or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a fully integrated digital audio processor with I2C control is required for car audio applications. Ensure the design supports the 64-LQFP package dimensions (10x10 mm) and accommodates the necessary analog ground and supply connections. Verify that the system can handle the maximum supply voltage of 13V and that the thermal resistance of 50 °C/W is sufficient for the expected ambient conditions.

Part Context

The TDA7715 belongs to STMicroelectronics' portfolio of specialized automotive audio ICs. It serves as a central processing unit for car radios, bridging the gap between source inputs and power amplification stages. Its integration of multiple filter bands and diagnostic features reduces the need for discrete components, simplifying the overall audio system architecture in vehicle infotainment designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official STMicroelectronics resources for potential obsolescence management or cross-reference options if the TDA7715 becomes unavailable.