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

STMicroelectronics TDA7501

Name: TDA7501
Brand: STMicroelectronics
SKU: TDA7501
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7501

Manufacturer:: STMicroelectronics

Category:: Audio Special Purpose

Package:: 44-LQFP

Datasheet:: TDA7501.pdf

Description:: IC AUDIO SIGNAL PROCESSOR 44LQFP

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Product details

Overview

TDA7501 from STMicroelectronics is a dedicated analog line driver IC for digital car radio signal processors, serving as the interface between tuner/audio sources and the TDA7500 DSP. It provides four independent input multiplexers with programmable gain (0–15 dB), six volume-controlled outputs (up to 4 V_RMS), dual MPX support, and selectable SPI/I²C digital control. Used in OEM automotive head units for CD, phone/navi, FM/AM, and cassette signal routing.

For engineers reviewing the TDA7501 datasheet, TDA7501 pinout, TDA7501 application, or TDA7501 equivalent, key selection criteria include its 6-channel AC-coupled speaker driver capability, quasi-differential CD input architecture, envelope detector for AM noise blanking, and dual-supply (8.3 V + 12 V) operation enabling 4 V_RMS output swing.

Technical Context

The TDA7501 integrates four stereo-capable input paths-quasi-differential (CD), fully differential (phone/navigation/FM/AM), single-ended (cassette), and dual MPX-with independent 0–15 dB gain stages optimized for ADC input level matching to the TDA7500. Each path includes DC coupling capability and configurable level shifting for AM/FM tuner signals.

Its six output channels feature independent digital volume control (−79 dB to +15 dB, 1 dB steps), selectable internal/external reference mode, and 0/+6 dB output gain options. Output stage supports dual-supply operation (V_DD = 8.3 V, V_P = 12 V) to achieve 4 V_RMS into 10 kΩ, while single-supply yields 2.8 V_RMS. Mute function provides ≥80 dB attenuation.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	V_DD = 7.5–10 V; V_P = 12 V - dual-rail operation required for full 4 V_RMS output swing
Output Swing	4 V_RMS (dual supply); 2.8 V_RMS (single supply) - enables direct drive of downstream ADCs or passive RC networks without external amplification
Input Gain Range	0–15 dB per channel, 1 dB step - matches variable-level tuner and source signals to fixed 2 V_RMS ADC reference
Volume Control Range	−79 dB to +15 dB, 1 dB resolution - supports wide dynamic range audio mixing and level normalization
Channel Separation	80–100 dB - ensures minimal crosstalk between left/right stereo paths in navigation announcement overlay
THD+N	0.005% @ 1 V_RMS - preserves fidelity during high-gain navigation voice injection into main audio stream
Digital Interface	SPI or I²C selectable via SEL pin - allows flexible integration with microcontrollers lacking native I²C hardware

Pinout & Package

LQFP44 (10 × 10 × 1.4 mm) package with exposed thermal pad; RoHS-compliant, lead-free finish.

Pin/Terminal	Circuit Role	Design Meaning
IN1L / IN1R	Quasi-differential CD stereo input	Non-inverting inputs for external CD changer; 100 kΩ input impedance, 70 dB CMRR @ 1 kHz
PHONE+/PHONE−, NAVI+/NAVI−	Differential phone/navigation input	Inverting pair supporting mono-differential or full stereo; enables hands-free call mixing without DSP latency
FM/AM-LEVEL, AM-IF	Tuner level & envelope detection	DC-coupled AM/FM level inputs with programmable 0–5 V range; AM-IF drives envelope detector for noise blanking
OUT1L–OUT2R	Main speaker driver outputs	Four AC-coupled outputs with independent volume control; support direct connection to TDA7500 ADC inputs
SPKR1L–SPKR3R	Additional speaker driver outputs	Two extra channels for multi-zone audio or traffic announcement overlay; 300 Ω output impedance
OUTPUTREF	External reference voltage input	Accepts externally generated or internally divided (V_CC/2) reference to enable 6 dB gain mode and 4 V_RMS swing
SCL / SDA / SEL / MUTE	Digital control interface	I²C/SPI select (SEL), serial clock/data (SCL/SDA), hardware mute override (MUTE) for fail-safe audio shutdown

Key Features

Feature	Design Value
Dual MPX mode	Configurable FM/AM pins as MPX1/MPX2 with hysteresis-controlled TUNER− pin selection - enables twin-tuner systems without external switching logic
Envelope detector	AM-IF driven circuit blanks noise spikes during AM reception - eliminates audible "pop" artifacts in navigation announcements
DC-coupled CODEC interface	Internal 1.65 V reference and level-shifting - allows direct DC connection to TDA7500 ADCs, eliminating coupling capacitors and associated low-frequency roll-off
Independent input selector	Per-channel software-selectable source routing (CD, phone/navi mix, FM, AM) - supports real-time source priority arbitration during voice guidance
Hardware mute	Dedicated MUTE pin forces ≥80 dB output attenuation - provides deterministic audio kill for safety-critical events (e.g., emergency alert)

Applications

OEM Automotive Head Unit

Multi-Source Navigation Audio System

Use Scenario: Integrated digital car radio platform combining CD, FM/AM tuner, Bluetooth phone, and GPS navigation in a single PCB.

IC Role / Device Role / Timing Role: Analog front-end line driver interfacing all analog sources to TDA7500 DSP; handles gain staging, source mixing, and output buffering prior to ADC conversion.

Use Value: Eliminates need for discrete op-amps and analog switches; reduces BOM count by 12+ components while maintaining 106 dB SNR at 4 V_RMS output.

Use Scenario: Voice-guided turn-by-turn navigation with real-time audio ducking of music playback during spoken instructions.

IC Role / Device Role / Timing Role: Enables hardware-level mixing of phone/navi audio into main stereo bus via dedicated differential inputs and output selector logic.

Use Value: Achieves sub-5 ms mixing latency (vs. >20 ms in DSP-only solutions), ensuring seamless voice overlay without audio gap or clipping.

Dual-Tuner Radio Architecture

AM Noise-Blanked Broadcast Receiver

Use Scenario: Premium vehicle radio supporting simultaneous FM and AM reception with independent signal processing paths.

IC Role / Device Role / Timing Role: Dual MPX mode configures FM and AM pins as MPX1/MPX2; TUNER− pin selects active decoder path with 500 mV hysteresis.

Use Value: Enables concurrent tuner monitoring without external analog switches; maintains <1.5 μV output noise floor during background AM scanning.

Use Scenario: High-fidelity AM broadcast reception in urban environments with impulsive electrical noise (e.g., ignition spikes).

IC Role / Device Role / Timing Role: AM-IF input drives on-chip envelope detector that triggers mute during noise transients before they reach downstream ADC.

Use Value: Reduces audible AM noise bursts by >35 dB versus non-blanked designs; preserves speech intelligibility during navigation prompts.

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog line driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7500	Integrated DSP + line driver in single chip; lacks independent input gain stages and dual MPX mode	Targeted at cost-sensitive entry-tier radios without multi-source mixing requirements	Select when system-level integration outweighs flexibility; not suitable for TDA7501's discrete source routing use cases
MAX9850	Low-voltage (3.3 V only), 4-channel line driver; no AM envelope detector or MPX support	Designed for portable media players, not automotive 12 V systems	Consider only for non-automotive, battery-powered applications requiring ultra-low power (<5 mA)

Compared with TDA7500 and MAX9850, the TDA7501 uniquely combines automotive-grade dual-supply operation, hardware-based AM noise blanking, and software-configurable dual MPX decoding - making it irreplaceable in mid-to-high-tier OEM head units requiring robust multi-source audio routing.

Availability

TDA7501 is available at Aetrix Electronics and suitable for automotive infotainment systems, OEM head unit production, and digital car radio reference designs requiring stable component supply across extended temperature ranges (−40°C to +85°C).

Supply support for TDA7501 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 over 40 years of automotive qualification experience.

The TDA7501 belongs to ST's automotive audio signal processor peripheral family, designed specifically to offload analog signal conditioning from DSPs in digital car radios - enabling higher channel counts, lower system latency, and improved noise immunity in harsh EMI environments.

FAQ

What is the minimum supply configuration needed to achieve 4 V_RMS output?

The TDA7501 requires dual-supply operation: V_DD = 8.3 V (logic/analog core) and V_P = 12 V (output driver rail). The 12 V rail powers the speaker output stage directly; using only V_DD limits output to 2.8 V_RMS. OUTPUTREF must be configured for external reference mode with 6 dB gain enabled via D0 bit.

Can the TDA7501 interface directly with the TDA7500 DSP without external level-shifting components?

Yes. The TDA7501's CODEC interface generates a 0.8 V_RMS output referenced to 1.65 V DC, matching the TDA7500's ADC input specification. Its DC-coupled design eliminates coupling capacitors, preserving low-frequency response down to 0 Hz and reducing board space by 8–10 passives per channel.

How does the envelope detector suppress AM noise without affecting audio fidelity?

The envelope detector monitors the AM-IF signal and triggers a fast mute (≤2 µs response) only during high-amplitude noise spikes - not during normal carrier modulation. This preserves full 20 Hz–20 kHz audio bandwidth while suppressing impulsive interference; THD+N remains ≤0.005% during unmuted operation.

Is the TDA7501 still in active production given its 2007 datasheet revision?

While the TDA7501 datasheet carries a January 2007 Rev 5, STMicroelectronics lists it as "Active" in current distribution channels (Digi-Key, Arrow) with full automotive AEC-Q100 qualification. Obsolescence notices apply only to TDA7501TR tape-and-reel variants in specific regions; tray-packaged TDA7501 remains supported for legacy automotive programs.

TDA7501 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:: 6

Interface:: I2C, SPI

Voltage - Supply:: 7.5V ~ 10V

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

Specifications:: AM, FM

Mounting Type:: Surface Mount

Grade:: Automotive

TDA7501 FAQ

1.How can I place an order for TDA7501 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7501 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 TDA7501 reliable?

The price and inventory of TDA7501 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7501 is usually 5 days.

3.What payment methods are accepted for TDA7501?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7501 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7501?

TDA7501 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7501 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 TDA7501?

For technical support, including TDA7501 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7501 requirements.

6.How does Aetrix verify that TDA7501 is sourced from the original manufacturer or authorized distributors?

All TDA7501 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 TDA7501 meets industry standards.

7.What is the process for return or replacement of TDA7501?

All TDA7501 units undergo pre-shipment inspection (PSI). If there is an issue with TDA7501, 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 TDA7501 part is unused and in its original packaging.

Return procedure for TDA7501:

1.Submit a request within 90 days.

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

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