STMicroelectronics TDA7719

Overview

TDA7719 from STMicroelectronics is an AEC-Q100 qualified automotive 3-band car audio processor in TSSOP28 package, integrating programmable loudness (±15 dB, 1 dB steps, 400/800/2400 Hz center), volume control (+15 to −15 dB), bass/middle/treble 2nd-order filters with independent center frequency and Q tuning, 4-channel speaker attenuation (−79 dB), subwoofer low-pass filter (80–160 Hz), and DC offset detection for amplifier failure diagnosis - deployed in OEM head units requiring multi-zone audio conditioning.

For engineers reviewing the TDA7719 datasheet, TDA7719 pinout, TDA7719 application, or TDA7719 equivalent, this device supports I²C-controlled soft-step audio processing, rear seat source selection, level metering, and fault-aware analog signal path management in automotive infotainment systems.

Technical Context

The TDA7719 implements a fully integrated analog audio signal processor with digital I²C configuration of all filter coefficients and gain stages. Its architecture includes three independent 2nd-order biquad sections per band (bass/middle/treble), each supporting four discrete center frequencies and programmable Q values - enabling precise tonal shaping across front/rear and main/secondary sources.

It features dual-path input multiplexing (QD/FD/SE configurations), four independent soft-step speaker output controls, two subwoofer outputs with dedicated low-pass filtering, and hardware-level DC offset detection circuitry that monitors amplifier output rails for open-circuit or short-circuit faults without external components.

Key Specifications

Pinout & Package

TSSOP28 package: 28-pin thin shrink small outline package, 4.4 mm × 9.7 mm body, 0.65 mm pitch, exposed thermal pad (GND-connected), rated for −40 °C to +85 °C ambient operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TDA7706, the TDA7719 adds middle-band EQ and DC fault detection; compared with MAX9742, it separates signal processing from power amplification - enabling scalable, serviceable, and diagnostic-capable audio architectures.

Availability

TDA7719 is available at Aetrix Electronics and suitable for OEM automotive head units, aftermarket stereo receivers, commercial fleet audio systems, and marine/RV infotainment platforms requiring stable component supply across extended product lifecycles.

Supply support for TDA7719 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, specializing in automotive, industrial, and power management ICs with broad manufacturing scale and AEC-Q100 validation expertise.

The TDA7719 belongs to ST's automotive audio processor family, designed specifically for high-fidelity, fault-aware signal conditioning in vehicle infotainment systems - emphasizing reliability, configurability, and integration density.

FAQ

What is the maximum sampling rate supported by the TDA7719?

The TDA7719 is an analog audio processor with no ADC or DAC; it operates on continuous-time analog signals. Its bandwidth extends to 20 kHz, and all filter responses (bass/middle/treble) are implemented in analog domain using switched-capacitor topologies synchronized to internal clock - no digital sampling is involved.

Does the TDA7719 require external passive components for filter tuning?

No external resistors or capacitors are required to configure bass/middle/treble center frequencies or Q factors - all filter coefficients are set digitally via I²C register writes. Only CREF (pin 14) requires a 100 nF ceramic capacitor to ground for DC offset detector stability.

Can the TDA7719 drive headphones directly?

No. The TDA7719 outputs are line-level (2 VRMS clipping, 30–100 Ω impedance) intended for connection to external power amplifiers. It lacks headphone driver capability, current boost, or DC-blocking capacitors - using it with headphones would require additional buffer and level-shifting circuitry.

How does the DC offset detection function interface with microcontrollers?

DC_ERR (pin 27) is an open-drain output that pulls low when detected offset exceeds programmed threshold. It can be wired to any GPIO interrupt pin; no polling is needed. The threshold is selected via I²C register (0x03, bits 0–1), and fault duration is internally filtered to reject transients up to 44 μs.