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

STMicroelectronics TDA7407

Name: TDA7407
Brand: STMicroelectronics
SKU: TDA7407
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7407

Manufacturer:: STMicroelectronics

Category:: Audio Special Purpose

Package:: 44-LQFP

Datasheet:: TDA7407.pdf

Description:: IC AUDIO SIGNAL PROCESSOR 44LQFP

Quantity:: RFQ Add To RFQ list

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Inventory:103

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Product details

Overview

TDA7407 from STMicroelectronics is an advanced car audio signal processor IC integrating audioprocessor, stereo FM decoder with multipath detection, noise blanker, and softmute functionality. It operates from 7.5–10 V supply, draws 30–40 mA, delivers ±15 dB bass/mid/treble control in 1 dB steps, and features fully programmable I²C interface with no external filter components required - deployed in OEM automotive head units for real-time audio enhancement and interference suppression.

For engineers reviewing the TDA7407 datasheet, TDA7407 pinout, TDA7407 application, or TDA7407 equivalent, key selection considerations include its LQFP44 package, integrated stereo blend and field-strength-controlled demodulation, programmable roll-off compensation, absence of external passive components for tone filtering, and compatibility with automotive-grade thermal and ESD requirements (MIL-STD-883).

Technical Context

The TDA7407 implements a three-band parametric equalizer (bass/mid/treble) with independently programmable center frequencies (e.g., bass: 60/70/80/100 Hz; mid: 500/1k/1.5k/2k Hz; treble: 10/12.5/15/17.5 kHz), Q-factors (bass: 1/1.25/1.5/2), and ±15 dB gain in 1 dB steps. Its stereo decoder includes PLL-based pilot tone detection, de-emphasis, high-cut filtering, and stereoblend control driven by LEVEL input voltage.

Signal path integration includes differential CD/cassette/phone inputs, AM mono input, MPX baseband processing, multipath quality detection (QUAL output), and four independent speaker-level outputs (OUTLF/OUTRF/OUTLR/OUTRR) with 79 dB attenuation range. All functions are configured via I²C subaddresses (0x00–0x11), supporting auto-increment and register-mapped control of mute timing, noiseblanker thresholds, and field-strength gain.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	7.5–10 V - supports automotive battery variation without external regulation
Supply Current	30–40 mA @ VS = 9 V - enables low-power head unit operation
Audioprocessor Gain Range	±15 dB in 1 dB steps - precise tonal shaping without analog trimming
Bass Center Frequencies	60/70/80/100 Hz - optimized for cabin acoustic response below 120 Hz
Stereo Decoder SNR	≥80 dB input separation - maintains channel integrity under multipath distortion
I²C Interface	Standard-mode (100 kHz) - compatible with microcontroller-based radio control systems
ESD Protection	MIL-STD-883 compliant - withstands ≥2 kV HBM on all pins for automotive assembly robustness

Pinout & Package

LQFP44 package (10 × 10 mm, 0.8 mm pitch) with exposed thermal pad; RoHS-compliant, lead-free finish.

Pin/Terminal	Circuit Role	Design Meaning
1 CDR	CD right channel input	Differential analog input for CD playback path
5 CDL	CD left channel input	Differential analog input paired with CDR for stereo CD decoding
11,13,17,20,25,28,33,36	No connect	Internally unconnected; must remain floating or grounded per layout guidelines
12 MPX	FM stereo multiplex input	Baseband input for stereo decoder stage (19 kHz pilot + L−R)
14 LEVEL	Stereo decoder level control input	Analog voltage (0–VREF) setting stereoblend ratio and high-cut threshold
16 MPOUT	Multipath detector output	Open-drain signal indicating multipath severity for dynamic audio adaptation
23 SCL / 24 SDA	I²C bus interface	Configures all internal blocks including tone filters, mute timing, and decoder parameters
31 OUTRF / 32 OUTLF / 29 OUTRR / 30 OUTLR	Speaker driver outputs	Four independent line-level outputs for front/rear speaker routing
41 VREF	Reference voltage output	Stable 2.5 V reference for LEVEL and other analog control inputs

Key Features

Feature	Design Value
Integrated stereo decoder with multipath detection	QUAL output and MPOUT enable real-time RF link quality feedback to MCU for adaptive blending
Three-band parametric equalization	Independent bass/mid/treble controls with selectable Q-factor and center frequency eliminate need for external op-amp filters
Softmute with 4 programmable timing profiles	T1=0.48 ms to T4=324 ms allows seamless fade during station switching or noise events
Noise blanker with automatic threshold control	ATC adjusts trigger threshold dynamically using stereoblend voltage or over-deviation detection
Fully I²C-programmable architecture	24 subaddress registers (0x00–0x11) permit runtime reconfiguration without hardware changes

Applications

Automotive Head Unit

FM Radio Receiver Module

Use Scenario: Integrated infotainment system in passenger vehicles requiring multi-source audio processing (CD, tape, AM/FM, phone).

IC Role / Device Role / Timing Role: Central audio signal processor handling input switching, tone correction, stereo decoding, and speaker-level output routing.

Use Value: Eliminates 12+ external op-amps, RC networks, and trimmers - reduces BOM cost and PCB area by >35% versus discrete solutions.

Use Scenario: Compact FM tuner module for aftermarket car radios with digital tuning and RDS support.

IC Role / Device Role / Timing Role: FM stereo baseband processor providing pilot tone lock, de-emphasis, stereoblend, and multipath-aware audio recovery.

Use Value: QUAL and MPOUT signals feed MCU to suppress artifacts during weak-signal conditions - improves perceived audio continuity.

AM/FM Tuner with Noise Suppression

Car Audio Evaluation Platform

Use Scenario: High-reliability AM/FM receiver in commercial fleet vehicles operating in urban multipath environments.

IC Role / Device Role / Timing Role: Dual-role processor: noise blanker detects impulse noise (e.g., ignition spikes), while multipath detector modulates stereoblend to preserve mono intelligibility.

Use Value: Automatic threshold control (ATC) adapts blanker sensitivity to signal strength - prevents false triggering during normal reception.

Use Scenario: Reference design platform for automotive audio algorithm development and I²C firmware validation.

IC Role / Device Role / Timing Role: Programmable signal conditioning node enabling rapid prototyping of tone curves, mute sequences, and decoder parameter sweeps.

Use Value: All 24 configuration registers accessible via standard I²C - accelerates lab testing of audio processing pipelines without soldering changes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7460	Predecessor in same CSP family; lacks multipath detector and noise blanker; requires external capacitors for tone filter tuning	Lower integration - suitable only for cost-sensitive AM/FM-only designs without advanced interference mitigation	Select when legacy compatibility or reduced feature set suffices and board space permits external components
STA559BW	Digital audio processor with DSP core; supports user-defined FIR/IIR filters but no integrated FM stereo decoder or multipath logic	Requires external tuner IC and custom firmware - targets premium systems needing custom audio algorithms	Select when flexible post-decoding processing (e.g., active noise cancellation) outweighs integrated decoder convenience

Compared with TDA7407, TDA7460 offers lower integration and no multipath/noiseblanker capability, while STA559BW shifts complexity to software at the cost of requiring external tuner and firmware development - making TDA7407 optimal for turnkey FM/AM/CD audio processing in volume automotive production.

Availability

TDA7407 is available at Aetrix Electronics and suitable for automotive infotainment systems, FM radio receiver modules, and AM/FM tuner assemblies requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TDA7407 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, power, and analog/mixed-signal ICs with broad manufacturing and qualification expertise.

The TDA7407 belongs to ST's Car Signal Processor (CSP) family, designed specifically to consolidate audio preprocessing, FM stereo decoding, and interference mitigation into a single programmable IC for cost- and space-constrained automotive head units.

FAQ

Is the TDA7407 still in production?

No - STMicroelectronics has marked TDA7407 as obsolete per official documentation (Rev 3, Jan 2007). However, Aetrix Electronics maintains legacy inventory with full traceability and provides engineering support for ongoing production programs requiring this specific signal processor.

What is the function of the QUAL pin (Pin 21)?

QUAL is an open-drain output that reflects stereo decoder quality: low state indicates good multipath condition (strong signal), high state indicates degraded reception. It connects directly to a microcontroller GPIO to trigger stereoblend adjustment or audio muting without I²C polling.

Can the TDA7407 drive speakers directly?

No - it provides line-level pre-amplified outputs (e.g., OUTLF, OUTRF) intended for connection to external Class AB or Class D power amplifiers. Output current is limited to ±5 mA; driving 4 Ω speakers would require additional amplifier stages.

How does the noise blanker respond to ignition noise?

The noise blanker uses a dual-path trigger: one path monitors peak amplitude (VPEAK), the other detects over-deviation in the FM demodulator. When either exceeds the ATC-adjusted threshold, it blanks audio for programmable durations (T1–T4), suppressing impulsive noise while preserving speech intelligibility.

TDA7407 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 44-LQFP

Packaging:: Tray

Product Status:: Obsolete

Function:: Audio Signal Processor

Applications:: Audio

Number of Channels:: 2

Interface:: I2C

Voltage - Supply:: 7.5V ~ 10V

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

Specifications:: -

Mounting Type:: Surface Mount

Grade:: Automotive

TDA7407 FAQ

1.How can I place an order for TDA7407 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7407 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 TDA7407 reliable?

The price and inventory of TDA7407 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7407 is usually 5 days.

3.What payment methods are accepted for TDA7407?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7407 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7407?

TDA7407 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7407 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 TDA7407?

For technical support, including TDA7407 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7407 requirements.

6.How does Aetrix verify that TDA7407 is sourced from the original manufacturer or authorized distributors?

All TDA7407 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 TDA7407 meets industry standards.

7.What is the process for return or replacement of TDA7407?

All TDA7407 units undergo pre-shipment inspection (PSI). If there is an issue with TDA7407, 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 TDA7407 part is unused and in its original packaging.

Return procedure for TDA7407:

1.Submit a request within 90 days.

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

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