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

STMicroelectronics TDA7462D

Name: TDA7462D
Brand: STMicroelectronics
SKU: TDA7462D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7462D

Manufacturer:: STMicroelectronics

Category:: Audio Special Purpose

Package:: 28-SOIC (0.295", 7.50mm Width)

Datasheet:: TDA7462D.pdf

Description:: IC AUDIO SIGNAL PROCESSOR 28SO

Quantity:: RFQ Add To RFQ list

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Inventory:2,115

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Product details

Overview

TDA7462D from STMicroelectronics is a fully integrated dual-channel audio processor IC designed for automotive and high-fidelity multi-source car audio systems. It features five stereo + one mono input channels, four independent speaker outputs (front/rear left/right), dynamic compression for CD sources, dedicated differential subwoofer output, voice-band filter, softmute/softstep volume control, and full I²C programmability. It operates from 7.5–10.2 V supply and delivers 106 dB SNR with 0.005% THD+N at 1 VRMS.

For engineers reviewing the TDA7462D datasheet, TDA7462D pinout, TDA7462D application, or TDA7462D equivalent, this device supports precise loudness compensation (±15 dB, 4 programmable center frequencies), bass/treble equalization (2nd-order, Q-adjustable), pause detection, beep generation (780/1.56 kHz), and AutoZero offset cancellation - all configurable via 8-bit I²C interface at up to 500 kbit/s.

Technical Context

The TDA7462D integrates a mixed-signal BICMOS architecture with dedicated analog front-end stages: true differential CD inputs (with buffer for high-impedance sources), pseudo-differential and single-ended inputs, and AutoZero offset cancellation before mixing. Its digital control core manages 8 subaddress registers for source selection, loudness, volume, bass/treble, speaker attenuation, rear processing, subwoofer, and softmute.

Signal path includes programmable in-gain (0–15 dB, 1 dB steps), 4-level mixing (phone/rear as mix sources), second-order loudness (400/800 Hz center, selectable Q), bass (60/70/80/100 Hz, Q = 0.9–2.2), treble (10/12.5/15/17.5 kHz), and voice-bandpass (HPF: 90/130/180/260 Hz; LPF: 3/6 kHz). The compander stage provides 2:1 dynamic compression with attack times from 6–49 ms and release up to 1.56 s.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	7.5–10.2 V - supports automotive battery range with 60 dB ripple rejection at 1 kHz
Supply Current	25–35 mA at VS = 9 V - enables low-power operation in head-unit standby modes
SNR	106 dB (flat, 2 VRMS) - ensures high-fidelity playback without audible noise floor
THD+N	0.005% at 1 VRMS - preserves signal integrity across full dynamic range
I²C Interface	Up to 500 kbit/s - allows real-time parameter updates without audio interruption
Input Channels	5 stereo + 1 mono - supports CD, MD, phone, rear, and auxiliary sources simultaneously
Speaker Outputs	4 independent channels (LF/RF/LR/RR) - enables discrete front/rear fader control
Subwoofer Output	Differential mono with 6 dB gain and phase inversion bit - simplifies active subwoofer integration

Pinout & Package

Package: SO-28 (Small Outline, 28-pin, 300 mil width), RoHS-compliant, thermal resistance R_{th-j pins} = 85 °C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 SE1L	Single-ended input 1, left channel	Accepts line-level left audio from primary source (e.g., CD player)
5 CDL+	Differential CD input, left positive	True differential input with internal buffer for high-Z CD sources
14 CREF	Stabilizer capacitor connection	External capacitor sets reference stability for internal biasing
17 SUBOUT−	Subwoofer output, negative terminal	Differential output pair (with SUBOUT+) for low-noise subwoofer drive
21 OUTRF	Speaker output, right front	Independent digitally attenuated output for front-right speaker
24 SCL	I²C clock input	Controls synchronous data transfer timing for register programming
25 SDA	I²C data I/O	Bidirectional bus for reading/writing 8 subaddress registers
26 MUTE	Softmute enable input	Active-low pin triggering 4-stage S-curve mute/de-mute (0.48–170 ms)

Key Features

Feature	Design Value
AutoZero offset cancellation	Reduces DC offset to ≤0.5 mV before mixing, eliminating pop/click during source switching
Programmable voice-bandpass filter	Configurable HPF (90/130/180/260 Hz) and LPF (3/6 kHz) for hands-free telephony clarity
Dynamic compander stage	2:1 compression ratio with adjustable attack (6–49 ms) and release (195 ms–1.56 s) for CD source optimization
SoftStep volume control	Four programmable blend times (0.16–20.4 ms) eliminate audible clicks during level transitions
Dedicated pause detector	Output (Pin 23) triggers on zero-crossing detection with 4 threshold windows (1–160 mV) for tape/CD pause sensing
Beep generator	Internal dual-tone generator (780 Hz / 1.56 kHz) for UI feedback without external components

Applications

Automotive Head Unit

Multi-Source Audio Receiver

Use Scenario: Integrated infotainment system with CD, MD, Bluetooth phone, and rear-seat entertainment inputs.

IC Role / Device Role / Timing Role: Central audio processor managing input routing, loudness compensation, bass/treble EQ, and independent front/rear speaker fader control.

Use Value: Enables seamless source switching with AutoZero, reduces cabin noise masking via programmable loudness, and supports OEM-specific EQ profiles via I²C.

Use Scenario: High-end home theater receiver supporting CD, phono, and auxiliary analog inputs.

IC Role / Device Role / Timing Role: Analog signal conditioner providing dynamic compression for CD playback, subwoofer synthesis, and voice-band filtering for intercom mode.

Use Value: Delivers 106 dB SNR and 0.005% THD+N for critical listening, while differential subwoofer output minimizes ground-loop hum in multi-amplifier setups.

Car OEM Telematics System

Professional Audio Mixer Module

Use Scenario: Embedded telematics unit with hands-free calling, navigation voice prompts, and media playback.

IC Role / Device Role / Timing Role: Audio hub performing voice-bandpass filtering, beep generation for UI alerts, and pause detection for call handover.

Use Value: Voice-bandpass (90–6 kHz) enhances speech intelligibility; built-in beep eliminates need for external tone generator; pause detector synchronizes call/resume actions.

Use Scenario: Compact rack-mount audio processor for studio monitoring or broadcast applications.

IC Role / Device Role / Timing Role: Precision analog front-end with programmable in-gain (0–15 dB), mixing stage, and softmute for clean channel muting during live switching.

Use Value: 1 dB in-gain steps and ±15 dB loudness control allow fine-grained calibration; softmute (80–100 dB attenuation) prevents transient spikes during broadcast transitions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7461D	Lacks subwoofer output, compander, and voice-band filter; only 3 stereo inputs; no pause detector	Suitable for cost-sensitive 2-zone audio without bass management or telephony features	Select when subwoofer support and dynamic compression are unnecessary
STA333BW	Digital-input (I²S/PCM) Class-D audio processor with integrated amplifier drivers; no analog input multiplexer	Targets digital-source-only systems (e.g., DSP-based head units); requires external ADC for analog inputs	Select for fully digital audio chains requiring integrated power stage control

Compared with TDA7462D, TDA7461D omits key features required for modern multi-source automotive audio (subwoofer, compander, voice-band), while STA333BW shifts architecture to digital-domain processing - making TDA7462D uniquely suited for mixed analog-source systems needing full programmable analog signal conditioning.

Availability

TDA7462D is available at Aetrix Electronics and suitable for automotive infotainment, professional audio mixing, and telematics voice interface applications requiring stable component supply and long-lifecycle support.

Supply support for TDA7462D 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 analog, power, and automotive ICs with over 40 years of automotive qualification expertise.

The TDA7462D belongs to ST's TDA7xxx family of automotive-grade audio processors, designed specifically for high-reliability, multi-source car audio systems requiring programmable analog signal conditioning and I²C configurability.

FAQ

What is the maximum recommended supply voltage for continuous operation?

The absolute maximum supply voltage is 10.5 V, but the specified operating range is 7.5–10.2 V. Operating above 10.2 V risks exceeding thermal limits and degrading long-term reliability. The device draws 25–35 mA at 9 V, and junction temperature must remain below 150 °C - verified via R_{th-j pins} = 85 °C/W and ambient derating curves in the datasheet.

How does the AutoZero function eliminate audible artifacts during source switching?

AutoZero activates automatically when data byte 0 is loaded, nulling DC offset from input and in-gain stages within ≤0.3 ms. It runs before the mixing stage and mutes the signal path during correction to prevent pops. In AutoZeroRemain mode (bit enabled), prior calibration persists - avoiding repeated mute events during I²C refresh cycles.

Can the subwoofer output be used in single-ended mode?

No - the subwoofer output is strictly differential (SUBOUT+ and SUBOUT−), requiring balanced connection to an external amplifier. Internally, it sums left/right channels with 6 dB gain and includes software-controllable 180° phase inversion. Attempting single-ended use violates the output stage design and degrades CMRR and noise performance.

What determines the effective control range of the loudness function?

Loudness attenuation is ±15 dB in 1 dB steps, but its frequency-dependent effect centers at 400 Hz or 800 Hz (programmable), with second-order response shaping. At the center frequency, attenuation matches the programmed value; at extremes (e.g., 100 Hz or 5 kHz), deviation occurs per the loudness curve - confirmed by Figures 3–5 in the datasheet.

TDA7462D Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 28-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Obsolete

Function:: Audio Signal Processor, Compander

Applications:: Consumer Audio

Number of Channels:: 2

Interface:: I2C

Voltage - Supply:: 7.5V ~ 10.2V

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

Specifications:: -

Mounting Type:: Surface Mount

Grade:: -

TDA7462D FAQ

1.How can I place an order for TDA7462D through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7462D 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 TDA7462D reliable?

The price and inventory of TDA7462D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7462D is usually 5 days.

3.What payment methods are accepted for TDA7462D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7462D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7462D?

TDA7462D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7462D 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 TDA7462D?

For technical support, including TDA7462D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7462D requirements.

6.How does Aetrix verify that TDA7462D is sourced from the original manufacturer or authorized distributors?

All TDA7462D 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 TDA7462D meets industry standards.

7.What is the process for return or replacement of TDA7462D?

All TDA7462D units undergo pre-shipment inspection (PSI). If there is an issue with TDA7462D, 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 TDA7462D part is unused and in its original packaging.

Return procedure for TDA7462D:

1.Submit a request within 90 days.

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

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