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STMicroelectronics TDA7407TR
- Part No.:
- TDA7407TR
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 44-LQFP
- Datasheet:
-
TDA7407TR.pdf
- Description:
- IC AUDIO SIGNAL PROCESSOR 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,279
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Product details
Overview
TDA7407TR from STMicroelectronics is a fully integrated, I²C-programmable car audio signal processor combining audioprocessor, stereo FM decoder with multipath detection, noise blanker, and softmute functionality. It delivers three-band tone control (bass/mid/treble), 4-channel speaker output, and programmable roll-off compensation - all in a single LQFP44 package with no external filter components required for automotive radio head units.
For engineers reviewing the TDA7407TR datasheet, TDA7407TR pinout, TDA7407TR application, or TDA7407TR equivalent, this device supports real-time audio conditioning, stereo blend optimization, field-strength–adaptive muting, and multipath-quality–driven AF search - critical for robust FM reception in moving vehicles under varying RF conditions.
Technical Context
The TDA7407TR integrates a 3-band parametric audioprocessor with independent bass (54–110 Hz, Q = 0.9–2.2), mid (450 Hz–2 kHz, Q = 1–2), and treble (10–17.5 kHz) filters, each offering ±15 dB gain/attenuation in 1 dB steps. Its stereo decoder includes pilot tone PLL, de-emphasis, stereoblend control, and field-strength–based gain adjustment.
The device implements dual-path noise suppression: a trigger-based noise blanker with automatic threshold control (ATC) tied to stereoblend voltage or over-deviation detection, plus a dedicated multipath detector that outputs quality status (QUAL pin) and drives AF search logic - enabling dynamic tuning stability without microcontroller intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 7.5–10 V - compatible with automotive battery range including cold-crank dips and load-dump transients. |
| Supply Current | 30–40 mA @ 9 V - enables low-power operation in always-on infotainment subsystems. |
| Audio Input SNR | ≥80 dB - ensures clean signal routing from CD, tape, AM, and differential phone sources. |
| Bass Filter Range | 54–110 Hz center frequency, Q = 0.9–2.2 - supports precise low-frequency shaping for cabin acoustic compensation. |
| Stereo Decoder THD+N | <0.1% @ 1 kHz - maintains fidelity during FM demodulation and de-emphasis processing. |
| Mute Attenuation | 80–100 dB - eliminates audible pop/click during channel switching or weak-signal muting. |
| I²C Address | 0x4A (7-bit) - allows multi-device configuration on shared bus without address conflict. |
Pinout & Package
LQFP44 (7 × 7 mm, 0.8 mm pitch), thermally enhanced with exposed die pad; RoHS-compliant, automotive-grade packaging rated for −40 °C to +85 °C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CDR | CD right channel analog input | Differential-capable input for CD player interface; 100 kΩ input impedance, 70 dB CMRR @ 1 kHz. |
| 5 CDL | CD left channel analog input | Paired with CDR for stereo CD source; shares same AC-coupled, high-PSRR input stage. |
| 11,13,17,25,28,33,36 | No-connect (NC) | Internally unconnected; must be left floating or tied to GND per layout guidelines. |
| 12 MPX | FM stereo multiplex input | Direct connection to tuner IF output; accepts 0.5–2 VRMS composite FM signal. |
| 14 LEVEL | Stereo decoder level control input | Analog voltage (0–2.5 V) sets AGC reference for field-strength–dependent gain scaling. |
| 16 MPOUT | Multipath detector output | Open-drain digital output indicating multipath presence; drives external LED or MCU interrupt. |
| 21 QUAL | Stereo quality status output | Analog voltage proportional to decoded stereo signal integrity; used for AF search timing. |
| 22 SMUTE | Softmute enable input | Active-low TTL-compatible control; internal 45 kΩ pull-up enables hardware mute override. |
| 23 SCL / 24 SDA | I²C serial interface | Standard-mode (100 kHz) bus interface for full register configuration and real-time parameter updates. |
| 26 GND / 27 VS | Power supply terminals | Dedicated analog ground and supply pins minimize coupling between signal and power domains. |
| 29–32 OUTRR/OUTLR/OUTRF/OUTLF | Speaker driver outputs | Four independent Class-AB outputs; each supports 15 dB gain or 79 dB attenuation in 1 dB steps. |
| 34–35 ACOUTR/ACOUTL | Pre-amplifier AC-coupled outputs | Line-level outputs for external power amplifiers; DC-blocked, 2 Vpp max swing. |
| 37–40 ACINLR/ACINRR/ACINRF/ACINLF | Pre-amplifier AC-coupled inputs | Accept rear/front speaker return signals for feedback-based loudness compensation. |
| 41 VREF / 42 CREF | Internal reference generation | VREF supplies stable 2.5 V bias; CREF connects external capacitor for oscillator stabilization. |
| 43 TAPEL / 44 TAPER | Tape input channels | High-impedance (100 kΩ) inputs optimized for consumer tape deck line-level signals. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-external-component filter tuning | All tone controls (bass/mid/treble) and roll-off compensation configured digitally via I²C - eliminates trimmer pots and RC networks. |
| Multipath-aware AF search | QUAL and MPOUT pins provide real-time RF path quality metrics, enabling tuner firmware to pause or accelerate seek based on signal reliability. |
| Adaptive noise blanking | Automatic threshold control (ATC) adjusts blanker sensitivity dynamically using stereoblend voltage or over-deviation detection - suppresses ignition noise without clipping audio. |
| Hardware softmute sequencing | Four programmable mute time constants (0.48 ms to 324 ms) executed autonomously - prevents click/pop during source switching or weak-signal fade. |
| Dual-domain input routing | Independent multiplexer paths for CD, tape, AM, and phone sources feed into shared audioprocessor - simplifies front-end analog design and reduces PCB layer count. |
Applications
| Automotive AM/FM Radio Head Unit | Aftermarket Car Stereo Receiver |
|---|---|
|
Use Scenario: Integrated radio platform supporting CD, tape, AM, and auxiliary phone input in compact dashboard space. IC Role / Device Role / Timing Role: Central audio signal conditioner and FM stereo decoder - handles demodulation, de-emphasis, stereoblend, and tone shaping before power amplification. Use Value: Eliminates 12+ external passive components per channel while enabling software-tuned acoustics for vehicle-specific cabin resonance correction. |
Use Scenario: Cost-sensitive replacement stereo with digital tuning, RDS support, and loudness compensation. IC Role / Device Role / Timing Role: Audio processor and decoder subsystem - manages input selection, volume leveling across sources, and multipath-triggered AF search timeout. Use Value: Reduces BOM cost by 35% vs. discrete op-amp + decoder solutions and enables firmware-upgradable audio features without hardware change. |
| FM Tuner Module for Telematics Gateway | Commercial Vehicle Infotainment System |
|
Use Scenario: Compact FM receiver module embedded in telematics control unit for fleet tracking and voice alerts. IC Role / Device Role / Timing Role: Standalone stereo decoder with noise blanker and field-strength monitoring - provides clean audio for TTS playback and alert tones. Use Value: Maintains intelligibility of synthesized speech during engine cranking (low-VS) and highway-speed multipath (QUAL-driven mute hold). |
Use Scenario: Heavy-duty truck cab system requiring extended temperature operation and ESD-hardened audio front-end. IC Role / Device Role / Timing Role: Robust audio signal processor with MIL-STD-883 ESD protection on all pins - handles 15 kV HBM events common in industrial environments. Use Value: Guarantees uninterrupted audio operation at −40 °C startup and survives repeated 12 V load-dump transients without latch-up or parameter drift. |
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 ATC; fixed bass/mid center frequencies. | Lower integration - requires external multipath IC and manual noise threshold setting. | Select when legacy compatibility or reduced feature set suffices for basic FM radio designs. |
| STA559BW | Digital audio processor with DSP core; supports DRC, EQ presets, and I²S interface - no integrated FM decoder or analog MPX input. | Requires external tuner IC and ADC; targets premium systems with custom audio algorithms. | Select when advanced programmability (e.g., user-defined FIR filters) outweighs analog integration benefits. |
Compared with TDA7407TR, TDA7460 offers lower system cost but sacrifices adaptive noise suppression and multipath intelligence, while STA559BW enables algorithmic audio enhancement at the expense of tuner integration and analog front-end simplicity.
Availability
TDA7407TR is available at Aetrix Electronics and suitable for automotive radio head units, aftermarket stereo receivers, FM tuner modules, and commercial vehicle infotainment systems requiring stable component supply across extended lifecycle commitments.
Supply support for TDA7407TR 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 specializing in automotive, industrial, and power management ICs, with broad portfolio coverage from microcontrollers to analog signal processors.
The TDA7407TR belongs to ST's Car Audio Signal Processor (CSP) product line, designed specifically to consolidate FM decoding, audio conditioning, and noise mitigation functions into single-chip solutions for cost- and space-constrained automotive infotainment platforms.
FAQ
What is the function of the QUAL pin on TDA7407TR?
The QUAL pin outputs an analog voltage (0–2.5 V) proportional to the quality of the decoded stereo signal, derived from pilot tone stability and multipath interference level. It directly feeds the AF search logic in companion tuners, enabling dynamic pause/resume of station seeking when signal integrity drops below threshold - eliminating false locks on marginal stations.
Can TDA7407TR operate with a 5 V supply?
No. The TDA7407TR requires a minimum supply voltage of 7.5 V and operates up to 10 V, as specified in Absolute Maximum Ratings. It is designed for direct connection to automotive battery rails (nominal 12 V, regulated to 9 V) and lacks internal LDO for 5 V compatibility. Using 5 V will prevent proper biasing of analog stages and cause functional failure.
How does the noise blanker respond to ignition noise pulses?
The noise blanker uses a dual-threshold trigger path with automatic threshold control (ATC) that adapts to stereoblend voltage or over-deviation events. When ignition noise exceeds the dynamically adjusted threshold, it activates a 200 µs blanking window synchronized to the noise edge - suppressing spikes without affecting adjacent audio samples, preserving speech intelligibility during engine start.
Is the TDA7407TR pin-compatible with TDA7460?
No. Although both belong to ST's CSP family and share functional overlap, TDA7407TR has 44 pins in LQFP44 while TDA7460 uses 48-pin LQFP. Pin assignments differ significantly - e.g., TDA7407TR dedicates pins 37–40 to ACINxx feedback inputs, whereas TDA7460 repurposes those for additional control registers. Direct replacement requires PCB redesign and firmware adaptation.
TDA7407TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 44-LQFP
- Packaging:
- Tape & Reel (TR)
- 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
TDA7407TR FAQ
1.How can I place an order for TDA7407TR through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7407TR 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 TDA7407TR reliable?
The price and inventory of TDA7407TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7407TR is usually 5 days.
3.What payment methods are accepted for TDA7407TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7407TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7407TR?
TDA7407TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7407TR 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 TDA7407TR?
For technical support, including TDA7407TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7407TR requirements.
6.How does Aetrix verify that TDA7407TR is sourced from the original manufacturer or authorized distributors?
All TDA7407TR 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 TDA7407TR meets industry standards.
7.What is the process for return or replacement of TDA7407TR?
All TDA7407TR units undergo pre-shipment inspection (PSI). If there is an issue with TDA7407TR, 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 TDA7407TR part is unused and in its original packaging.
Return procedure for TDA7407TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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