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Home > Products > Integrated Circuits (ICs) > Audio Special Purpose

STMicroelectronics TDA7715

Name: TDA7715
Brand: STMicroelectronics
SKU: TDA7715
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7715

Manufacturer:: STMicroelectronics

Category:: Audio Special Purpose

Package:: 64-LQFP

Datasheet:: TDA7715.pdf

Description:: 3 BAND CAR AUDIO PROCESSOR

Quantity:: RFQ Add To RFQ list

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Inventory:1,615

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Product details

Overview

TDA7715 from STMicroelectronics is a 3-band car audio signal processor IC designed for front-end audio conditioning in automotive head units. It integrates programmable bass/middle/treble filters (2nd-order, ±15 dB range), loudness compensation (400/800/2400 Hz center), soft-step speaker volume control (−79 to +23 dB), and six 3.55 VRMS line-driver outputs - deployed in OEM radio systems requiring real-time digital tone shaping and multi-zone output routing.

For engineers reviewing the TDA7715 datasheet, TDA7715 pinout, TDA7715 application, or TDA7715 equivalent, this page delivers verified functional architecture, LQFP64 package mapping, I²C-programmable filter coefficients, speaker mute timing options (4 ms–64 ms), and confirmed substitution paths for automotive infotainment BOM optimization.

Technical Context

The TDA7715 implements a fully digital-configurable analog signal path with independent 2nd-order biquad filters for bass (60–150 Hz, Q = 1.0–2.0), middle (500 Hz–2 kHz, Q = 1.0/2.0), and treble (10–17.5 kHz). All bands support 1 dB gain resolution and soft-step blending via internal DAC-controlled voltage-controlled amplifiers.

Its architecture includes three AC-coupled inputs (SE0–SE4, QD0–QD3), one AC-coupled output (ACOUTL/R), integrated DC offset detection (DCERR, WININ), and a 7-band spectrum analyzer with programmable in-gain (0/2/4/6 dB) - all synchronized to an external I²C master at up to 400 kHz.

Key Specifications

Parameter	Value and Actual Design Meaning
Bass Center Frequency	Programmable across 8 values: 60/70/80/100/110/120/130/150 Hz - enables precise low-frequency tuning for vehicle cabin acoustics.
Treble Center Frequency	4-step selection: 10/12.5/15/17.5 kHz - matches human high-frequency hearing sensitivity and tweeter resonance profiles.
Loudness Boost	15 dB peak at 400/800/2400 Hz with flat-mode option - compensates for perceived loudness loss at low volumes per ISO 226:2003.
Speaker Volume Range	−79 dB to +23 dB in 1 dB steps across 6 independent outputs - supports dynamic range compression and zone-specific level matching.
Soft-Mute Timing	Main/sub mute: 0.5/4/8/16 ms; speaker mute: 4/8/32/64 ms - prevents pop/click during source switching or fault shutdown.
Line Driver Output	Six 3.55 VRMS outputs (LD0L/R, LD1L/R, LD2L/R) - drives external power amplifiers without external buffering.
Supply Voltage	7.5 V to 12.5 V (typ. 11.5 V) - compatible with automotive battery rail under load-dump and cold-crank conditions.

Pinout & Package

LQFP64 (10 × 10 × 1.4 mm) package with exposed thermal pad; RoHS-compliant, lead-free finish.

Pin/Terminal	Circuit Role	Design Meaning
SE0L–SE4R	Stereo single-ended inputs	Five stereo pairs (10 pins) accept line-level signals directly from tuner, Bluetooth, or USB audio sources.
QD0L–QD3R + QDxG	Quasi-differential stereo inputs	Four differential-capable channels (24 pins) reject common-mode noise from long cable runs in vehicle harnesses.
LD0L/R–LD2L/R	Line driver outputs	Six buffered outputs deliver 3.55 VRMS into 10 kΩ - interface directly with external Class AB/D amplifiers.
PA0L/R–PA1L/R	Internal amplifier outputs	Four dedicated outputs drive on-board power stages (e.g., front/rear speakers) without external drivers.
SCL/SDA	I²C interface	Standard 400 kHz I²C bus for real-time register configuration of all filters, gains, and mute states.
DCERR/WININ	DC offset detection	Monitors amplifier output for rail-to-rail DC faults; triggers diagnostic flag for ECU-level failure reporting.

Key Features

Feature	Design Value
Soft-step volume control	Programmable blend times prevent audible zipper noise during gain transitions in navigation voice prompts or call audio.
7-band spectrum analyzer	Integrated bandpass filters with selectable in-gain (0–6 dB) enable real-time LED bar-graph visualization without MCU intervention.
High-pass filter	8 cutoff options (50–220 Hz) protect subwoofers from damaging infrasonic content in digital audio streams.
AC coupling I/O	Three input and one output AC-coupled paths eliminate DC bias drift between mixed-signal blocks and external codecs.
Digital mute sequencing	Independent main/sub/speaker mute timing allows staggered shutdown to avoid transient coupling between audio zones.

Applications

Automotive Head Unit

OEM Infotainment System

Use Scenario: Central audio processor in factory-installed car radios with AM/FM, Bluetooth, and USB playback.

IC Role / Device Role / Timing Role: Primary tone-shaping and channel routing engine; receives baseband audio, applies user-selectable EQ, and distributes to front/rear/sub zones.

Use Value: Enables OEMs to meet regional loudness standards (e.g., EU R10) and deliver branded sound signatures via factory-programmed filter coefficients.

Use Scenario: Audio hub in connected vehicle platforms integrating Android Auto and Apple CarPlay.

IC Role / Device Role / Timing Role: Signal conditioner between SoC audio interface and multi-amplifier output stage; handles sample-rate conversion-independent analog processing.

Use Value: Offloads EQ, loudness, and speaker management from application processor - reducing CPU load and latency in real-time voice interaction.

Aftermarket Stereo Upgrade

Multi-Zone Cabin Audio

Use Scenario: High-fidelity replacement head unit for premium vehicle models with factory amplifier integration.

IC Role / Device Role / Timing Role: Analog front-end translator - converts factory CAN-based audio streams to line-level signals while preserving dynamic range.

Use Value: Maintains OEM steering wheel controls and display sync via I²C register mirroring, eliminating need for proprietary protocol reverse-engineering.

Use Scenario: Zone-based audio distribution in luxury SUVs with independent rear-seat entertainment.

IC Role / Device Role / Timing Role: Independent speaker volume controller for 6 outputs - enables simultaneous front (driver-focused), rear (entertainment), and subwoofer (shared) zones.

Use Value: Supports discrete mute/gain per zone without cross-talk; soft-mute timing prevents inter-zone audio leakage during source handover.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7719	Successor IC with extended treble range (up to 20 kHz), added 4th band (presence), and enhanced I²C error handling.	Requires updated firmware for new register map; supports higher-resolution audio sources (24-bit/96 kHz).	Choose for new designs targeting Hi-Res Audio certification; not drop-in due to pinout changes and added features.
STA559BW	Digital audio processor with integrated Class D amplifier (2×50 W); lacks dedicated line drivers and spectrum analyzer.	Replaces both processor and power stage - reduces board area but eliminates flexibility for external amp upgrades.	Prefer when system-level cost and space outweigh need for modular amplifier selection and visual feedback.

Compared with TDA7715, TDA7719 offers broader frequency coverage and future-proof register architecture, while STA559BW trades configurability for integration - making TDA7715 optimal where line-driver fidelity, diagnostic visibility, and field-upgradable EQ remain critical.

Availability

TDA7715 is available at Aetrix Electronics and suitable for automotive head units, OEM infotainment systems, and aftermarket stereo upgrades requiring stable component supply across extended vehicle production lifecycles.

Supply support for TDA7715 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, specializing in automotive-grade analog and power ICs with AEC-Q100 qualification expertise.

The TDA7715 belongs to ST's automotive audio processor product line, engineered specifically for robust, low-noise signal conditioning in harsh 12 V vehicle environments with stringent EMI and thermal constraints.

FAQ

What is the maximum I²C clock frequency supported by the TDA7715?

The TDA7715 supports standard-mode and fast-mode I²C operation up to 400 kHz. Its SCL/SDA pins meet I²C specification electrical characteristics including rise/fall time limits and bus capacitance tolerance (≤400 pF), enabling reliable communication with automotive microcontrollers such as STM32F7 or NXP S32K series without external level shifters.

Does the TDA7715 include built-in protection against overvoltage or thermal shutdown?

No. The TDA7715 does not integrate thermal shutdown or overvoltage lockout circuitry. It relies on external system-level protection: supply must be clamped to ≤13 V (per absolute max rating), and PCB layout must ensure junction temperature stays below 150 °C using the exposed thermal pad and recommended copper pour per ST AN4305 guidelines.

Can the spectrum analyzer outputs drive LEDs directly?

Yes. SAOUT provides a 0–2.5 V analog voltage proportional to band energy, and SACLK supplies a 128 kHz square wave clock. These signals are designed to interface directly with LED driver ICs like TLC5916 or discrete transistor arrays - no op-amp buffering required for typical 20 mA LED loads.

How is DC offset detection used in practice for amplifier diagnostics?

DCERR asserts logic-low when DC voltage exceeds ±100 mV at PA0L/PA0R or PA1L/PA1R outputs. This signal connects to a microcontroller GPIO to trigger fault logging, disable downstream amplifiers via SMUTE pins, and illuminate dashboard warning icons - fulfilling ISO 26262 ASIL-B diagnostic requirements for audio subsystems.

TDA7715 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 64-LQFP

Packaging:: Tray

Product Status:: Active

Function:: Fully Integrated Processor

Applications:: Pre-Amplifier

Number of Channels:: 2

Interface:: I2C

Voltage - Supply:: 7.5V ~ 12.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Specifications:: -

Mounting Type:: Surface Mount

Grade:: -

TDA7715 FAQ

1.How can I place an order for TDA7715 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7715 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TDA7715 reliable?

The price and inventory of TDA7715 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7715 is usually 5 days.

3.What payment methods are accepted for TDA7715?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7715 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7715?

TDA7715 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7715 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TDA7715?

For technical support, including TDA7715 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7715 requirements.

6.How does Aetrix verify that TDA7715 is sourced from the original manufacturer or authorized distributors?

All TDA7715 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TDA7715 meets industry standards.

7.What is the process for return or replacement of TDA7715?

All TDA7715 units undergo pre-shipment inspection (PSI). If there is an issue with TDA7715, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TDA7715 part is unused and in its original packaging.

Return procedure for TDA7715:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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