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STMicroelectronics TDA7469
- Part No.:
- TDA7469
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
TDA7469.pdf
- Description:
- IC AUDIO TONE PROCESSOR 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,916
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Product details
Overview
TDA7469 from STMicroelectronics is a low-voltage analog audio processor with integrated headphone power amplifier, designed for portable systems operating from 1.8–5.0 V supply. It provides stereo input/output, programmable volume control in 1 dB steps (−63 to +6 dB), treble boost (0–12 dB), bass control (0–14 dB), bass automatic level control (ALC), mute (90 dB attenuation), and stand-by function-all controlled via I²C serial bus.
For engineers reviewing the TDA7469 datasheet, TDA7469 pinout, TDA7469 application, or TDA7469 equivalent, this device is selected for compact, battery-powered audio front-ends requiring precise tone shaping, low-noise headphone drive (≤0.5% THD at 1 kHz), and software-configurable signal routing without external DACs or op-amp networks.
Technical Context
The TDA7469 implements a bipolar/CMOS mixed-signal architecture to achieve low distortion (<0.5% THD), low noise (5–10 µV output noise), and DC stepping-free volume/tone control. Its analog signal path uses resistor networks and operational amplifiers, while digital configuration is handled by an internal I²C decoder and latches.
All functions-including input selection (IN1/IN2, ±0 dB or −6 dB), treble/bass center frequency tuning via external components, ALC mode (volume- or bass-triggered), and soft-mute behavior-are fully programmable through six dedicated register subaddresses. The CREF pin enables adaptive reference voltage selection for ALC threshold calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8–5.0 V - supports single-cell Li-ion (3.0–3.7 V) and dual-AA (3.0 V) portable systems |
| Volume Control Range | −63 to +6 dB in 1 dB steps - enables precise loudness matching across diverse source levels |
| Treble Control | 0–12 dB boost - adjustable center frequency via external 3.3 nF capacitor and op-amp feedback |
| Bass Control | 0–14 dB boost - configurable Q and corner frequency using external 68 nF capacitors and 25 kΩ resistors |
| Max Output Power | 5–10 mW per channel into 16 Ω or 32 Ω - sufficient for earbud/headphone drive without external amplification |
| THD + Noise | 0.1–0.5% at 1 kHz, 0.1 Vrms - meets fidelity requirements for consumer-grade portable audio |
| Mute Attenuation | 90 dB - ensures complete acoustic silence during standby or input switching |
Pinout & Package
Package: SSOP24 (Shrink Small Outline Package, 8.2 mm × 7.8 mm, 0.65 mm pitch). RoHS-compliant, surface-mount, thermally optimized for portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10, 15, 24 | VS / PVS-L / PVS-R / CREF | Power supply inputs: main VS, left/right headphone amp supplies (PVS), and ALC reference voltage node |
| 2–3, 22–23 | IN1-L / IN2-L / IN1-R / IN2-R | Stereo dual-input channels with selectable gain (0 or −6 dB) via I²C register |
| 4, 21 | MUX-L / MUX-R | Analog multiplexer outputs feeding tone/VOL stages - used for internal signal routing |
| 5, 20 | TREBLE-L / TREBLE-R | Output of treble boost stage - connects to external RC network defining high-frequency response |
| 6–7, 18–19 | BASSI-L / BASSO-L / BASSI-R / BASSO-R | Bass integrator input/output nodes - external 68 nF caps set bass corner frequency and Q |
| 8–9, 16–17 | PGND-L / OUT-L / PGND-R / OUT-R | Dedicated power ground and amplified output pins - separate grounds minimize crosstalk in headphone drive |
| 11–14 | SDA / SCL / ALC / GND | I²C data/clock, ALC control pin (enables hardware override of ALC mode), and system ground |
Key Features
| Feature | Design Value |
|---|---|
| Bass ALC with selectable trigger | Configurable via pin or register to activate on volume change or bass boost level - prevents clipping during dynamic content |
| Software-programmable tone stack | Independent treble/bass registers allow real-time adjustment of boost amount and response shape without hardware changes |
| Low-quiescent-current operation | 1–10 µA quiescent current in headphone amp OFF state - extends battery life in always-on portable devices |
| DC stepping elimination | Bipolar/CMOS process and analog switch design ensure zero audible pop/click during volume or mute transitions |
| I²C address flexibility | Fixed 7-bit address 0x48 (10001000b) with no address pins - simplifies multi-device bus design in space-constrained layouts |
Applications
| Portable Media Player Audio Front-End | USB-C Audio Adapter Signal Conditioning |
|---|---|
|
Use Scenario: Battery-powered MP3/WMA player with dual analog line-in sources and 3.5 mm headphone jack. IC Role / Device Role / Timing Role: Central audio processor handling input selection, tone correction, volume scaling, and direct headphone drive. Use Value: Eliminates need for discrete op-amps and DACs; achieves <0.5% THD at 2.4 V supply with 10 mW output into 16 Ω. |
Use Scenario: Compact USB-C to 3.5 mm adapter converting digital audio to analog with user-adjustable EQ. IC Role / Device Role / Timing Role: Analog post-processing block receiving DAC output, applying programmable bass/treble, and driving headphones. Use Value: Enables firmware-updatable EQ profiles via I²C; ALC prevents overdrive when DAC output swings exceed headroom. |
| Smart Speaker Auxiliary Audio Path | Industrial Handheld Terminal Audio Interface |
|
Use Scenario: Secondary audio path in voice-assistant speaker for local playback (e.g., alarms, notifications) independent of main DSP chain. IC Role / Device Role / Timing Role: Stand-alone stereo processor with mute/standby triggered by host MCU over I²C. Use Value: Reduces BOM count by integrating tone control + headphone amp; 90 dB mute attenuation ensures silent standby. |
Use Scenario: Rugged handheld terminal with mono/stereo audio feedback for status alerts and voice prompts in factory environments. IC Role / Device Role / Timing Role: Low-voltage audio conditioner interfacing between codec and 32 Ω headset, supporting wide-temp operation (0–70 °C). Use Value: Operates down to 1.8 V - compatible with brown-out tolerant power rails; −75 dB PVS ripple rejection suppresses supply noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4413VN | Dedicated stereo DAC + headphone amp (24-bit, 192 kHz); no tone control or ALC; requires external microcontroller for EQ | Used where high-resolution digital audio playback is primary; lacks analog input processing capability | Select when system already includes a high-fidelity DAC and only needs clean headphone drive - not for analog source conditioning |
| CS42L52-CNZ | Ultra-low-power stereo codec (1.65–3.6 V); integrated ADC/DAC, but tone control limited to fixed 3-band EQ via registers | Targets voice-centric devices (e.g., VoIP handsets); bass/treble range narrower (±6 dB) and non-ALC | Prefer for full-duplex voice systems needing mic input + speaker/headphone output; insufficient for music-grade tone shaping |
Compared with AK4413VN and CS42L52-CNZ, the TDA7469 uniquely combines analog input conditioning, wide-range programmable tone control, and ALC in a single low-voltage IC - making it optimal for legacy analog source integration where digital audio preprocessing is unnecessary.
Availability
TDA7469 is available at Aetrix Electronics and suitable for portable media players, USB-C audio adapters, smart speaker auxiliary paths, and industrial handheld terminals requiring stable component supply and long-lifecycle support.
Supply support for TDA7469 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 consumer analog/mixed-signal ICs with strong emphasis on power efficiency and system integration.
The TDA7469 belongs to ST's legacy audio processor product line, engineered specifically for low-voltage portable audio subsystems where analog signal integrity, software configurability, and minimal external component count are critical.
FAQ
What is the minimum supply voltage required for full functionality of the TDA7469?
The TDA7469 operates across 1.8 V to 5.0 V, with full specification compliance (including 10 mW output power and ≤0.5% THD) guaranteed at VS = 2.4 V. Below 1.8 V, internal biasing fails and functions such as volume control and ALC become unstable or non-operational.
Can the TDA7469 drive 32 Ω headphones effectively?
Yes - the TDA7469 delivers 5–10 mW into 32 Ω loads at 2.5–2.8 V supply, with THD maintained below 0.5% at 1 kHz. Its dedicated PVS-L/PVS-R pins and separate PGND paths ensure low crosstalk and stable performance without external buffering.
How is the bass center frequency set in the TDA7469?
The bass center frequency is determined by external 68 nF capacitors (C6, C17, C18, C19) and 25 kΩ resistors (R5, R6, R7, R8) connected to BASSI/BASSO pins. Changing capacitor value shifts fc; typical default is ~100 Hz with 68 nF and 25 kΩ per channel.
Is the TDA7469 still in active production?
The TDA7469 is marked "Obsolete Product(s)" in ST's official documentation (Rev. 3, Dec 2004), but Aetrix Electronics maintains verified legacy stock with full traceability, datasheet-conforming test reports, and extended lifecycle support for existing designs requiring drop-in replacement.
TDA7469 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Audio Tone Processor
- Applications:
- Consumer Audio
- Number of Channels:
- 2
- Interface:
- I2C
- Voltage - Supply:
- 1.8V ~ 5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Specifications:
- ALC Surround
- Mounting Type:
- Surface Mount
- Grade:
- -
TDA7469 FAQ
1.How can I place an order for TDA7469 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7469 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 TDA7469 reliable?
The price and inventory of TDA7469 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7469 is usually 5 days.
3.What payment methods are accepted for TDA7469?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7469 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7469?
TDA7469 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7469 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 TDA7469?
For technical support, including TDA7469 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7469 requirements.
6.How does Aetrix verify that TDA7469 is sourced from the original manufacturer or authorized distributors?
All TDA7469 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 TDA7469 meets industry standards.
7.What is the process for return or replacement of TDA7469?
All TDA7469 units undergo pre-shipment inspection (PSI). If there is an issue with TDA7469, 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 TDA7469 part is unused and in its original packaging.
Return procedure for TDA7469:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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