STMicroelectronics TDA7440D013TR

Overview

TDA7440D013TR from STMicroelectronics is a digitally controlled stereo audio processor IC for Hi-Fi systems, integrating 4-channel stereo input multiplexing, programmable bass/treble control (±14 dB in 2 dB steps), volume control (−47 dB to 0 dB in 1 dB steps), dual independent speaker attenuators (−79 dB range), and I²C serial bus interface. It operates from 6–10.2 V supply and delivers <0.1% THD at 1 kHz with 106 dB signal-to-noise ratio.

For engineers reviewing the TDA7440D013TR datasheet, TDA7440D013TR pinout, TDA7440D013TR application, or TDA7440D013TR equivalent, key selection criteria include I²C-configurable tone/volume/balance functions, SO-28 package compatibility, low-distortion analog signal path using bipolar/CMOS technology, and support for high-resolution audio system tuning without mechanical potentiometers.

Technical Context

The TDA7440D013TR implements a fully digital control layer over an analog signal path: input gain (0–30 dB), volume (−47 dB to mute), bass/treble (±14 dB), balance (−79 dB to 0 dB), and speaker attenuation are all set via I²C commands. Internal resistor networks and op-amps generate precise AC signal conditioning without DC stepping artifacts.

Its architecture separates digital command decoding (I²C bus decoder + latches) from analog processing blocks: multiplexer with selectable gain, dual tone filters (externally configurable bass/treble center frequency), and two independent speaker-level attenuators with mute. All analog stages use ST's bipolar/CMOS process to achieve low noise (5–15 µV), high channel separation (≥90 dB), and thermal stability up to 70°C ambient.

Key Specifications

Pinout & Package

Package: SO-28 (Small Outline, 28-pin, ECOPACK® compliant, body width 7.4–7.6 mm, pitch 1.27 mm).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar stereo audio processor applications.

Compared with PGA2311U and CS4272-CQZ, the TDA7440D013TR uniquely combines analog signal integrity (106 dB SNR, <0.1% THD), hardware multiplexing, and full tone/volume/balance/speaker control in a single SO-28 IC - reducing BOM count and PCB area versus multi-chip solutions.

Availability

TDA7440D013TR is available at Aetrix Electronics and suitable for home audio receivers, professional monitor controllers, high-end CD player preamps, and automotive infotainment systems requiring stable component supply and long-term production continuity.

Supply support for TDA7440D013TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, mixed-signal, power, and microcontroller products for industrial, automotive, and consumer markets.

The TDA7440D013TR belongs to ST's legacy audio processor product line, engineered specifically for high-fidelity analog audio signal conditioning in cost-sensitive, space-constrained Hi-Fi and professional audio equipment.

FAQ

What is the minimum supply voltage required for reliable operation of the TDA7440D013TR?

The TDA7440D013TR is specified for 6–10.2 V operation, but functional testing confirms stable behavior down to 5 V. However, performance parameters-including THD, SNR, and clipping level-may degrade below 6 V, and operation at 4 V does not reset the device but is outside guaranteed specifications.

Can the bass and treble center frequencies be adjusted, and how?

Yes. Bass center frequency and Q factor are set by external R/C components connected to BIN(L/R) and BOUT(L/R) pins, using formulas provided in the datasheet. Treble center frequency is determined by an external capacitor from TREBLE(L/R) to ground, interacting with the internal 25 kΩ resistor.

Is separate grounding required for analog and digital sections?

Yes. The TDA7440D013TR has dedicated AGND (Pin 24) and DIG_GND (Pin 23) pins. To maintain 106 dB SNR and avoid digital switching noise coupling into the audio path, these grounds must be routed separately on the PCB and joined at a single point near the power supply decoupling capacitor.

Does the TDA7440D013TR support automatic input source detection or switching?

No. Input selection is strictly software-controlled via I²C commands sent to subaddress 0x00. The device does not include hardware auto-detection circuitry; source switching must be implemented by the host microcontroller based on user input or external trigger signals.