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STMicroelectronics TDA7715LV
- Part No.:
- TDA7715LV
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 64-LQFP
- Datasheet:
-
TDA7715LV.pdf
- Description:
- 3-BAND CAR AUDIO PROCESSOR
- Quantity:
- Payment:
- Shipping:
Inventory:2,757
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Product details
Overview
TDA7715LV from STMicroelectronics is a 3-band car audio signal processor IC with integrated loudness, bass/middle/treble equalization, stereo high-pass and mono low-pass filters, six SoftStep speaker controls, and dual output driver architecture (four internal amplifier outputs + six line-driver outputs). It features I²C digital control, programmable 2nd-order filter responses, and DC offset detection for on-board amplifier failure diagnosis - deployed in OEM automotive head units requiring real-time parametric tone shaping and robust channel management.
For engineers reviewing the TDA7715LV datasheet, TDA7715LV pinout, TDA7715LV application, or TDA7715LV equivalent, this page delivers verified specifications including 64-pin LQFP package mapping, exact I/O terminal roles, SoftStep blend time programming, loudness center frequencies (400/800/2400 Hz), and speaker attenuation range (–79 dB to +23 dB) - all confirmed against ST's production datasheet DocID025456 Rev 1.
Technical Context
The TDA7715LV implements a fully digital-configurable analog signal path: input multiplexing supports eight stereo inputs (four quasi-differential QD0–QD3 and five single-ended SE0–SE4), each with AC coupling capability; loudness, bass, middle, and treble sections use independent 2nd-order biquad filters with programmable center frequency, Q factor, and ±15 dB gain resolution in 1 dB steps.
Its output stage integrates four dedicated outputs (PA0L/PA0R/PA1L/PA1R) for internal power amplifiers and six line drivers (LD0L/LD0R/LD1L/LD1R/LD2L/LD2R); mute functions include digitally controlled SoftMute with four selectable ramp times per channel (main/sub/speaker paths), and DC offset detection feeds diagnostic signals via DCERR, WININ, WINTCL/WINTCR pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Loudness center frequency | Programmable at 400 Hz / 800 Hz / 2400 Hz - enables context-aware bass compensation across cabin acoustics and speaker roll-off profiles. |
| Bass center frequency | 8 selectable values: 60/70/80/100/110/120/130/150 Hz - matches common subwoofer crossover points and vehicle-specific resonance tuning. |
| Volume control range | +23 dB to –23 dB in 1 dB steps - provides precise gain matching between source devices and amplifier sensitivity tiers. |
| Speaker attenuation range | +23 dB to –79 dB in 1 dB steps - supports dynamic level balancing across front/rear/surround channels with wide headroom margin. |
| High-pass filter cutoff | 8 programmable settings: 50/60/80/100/120/150/180/220 Hz - protects tweeters and midranges from low-frequency energy in multi-way systems. |
| Low-pass filter cutoff | 5 settings: 50/60/80/100/120 Hz - aligns with typical subwoofer passband requirements in compact car audio enclosures. |
| I²C interface | Standard-mode (100 kHz) and fast-mode (400 kHz) compatible - enables real-time parameter updates without interrupting audio playback. |
| Supply voltage | 4.5 V to 12.5 V (typ. 8.5 V) - operates across automotive battery voltage transients (cold crank to load dump). |
Pinout & Package
LQFP64 (10 × 10 × 1.4 mm) package with exposed thermal pad; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SE0L–SE4R | Stereo single-ended audio inputs | Five independent stereo pairs accepting line-level signals up to 1.1 VRMS; support AC-coupled configurations. |
| QD0L–QD3R + QDxG | Quasi-differential stereo inputs | Four differential-capable inputs with common-mode rejection >60 dB @ 1 kHz - suppresses noise in long harness runs. |
| PA0L/PA0R/PA1L/PA1R | Internal amplifier outputs | Four dedicated outputs sharing driver stage with line drivers; intended for direct connection to on-board Class AB/D amplifiers. |
| LD0L–LD2R | Line driver outputs | Six buffered, low-impedance outputs (10 kΩ load) for driving external power amplifiers over shielded cables. |
| SCL/SDA | I²C bus interface | Two-wire serial control enabling full configuration of all filters, gains, mutes, and SoftStep timing parameters. |
| DCERR/WININ/WINTCL/WINTCR | DC offset detection circuit | Monitors amplifier output rails for rail-to-rail saturation or open-load faults; triggers diagnostic flag on DCERR pin. |
Key Features
| Feature | Design Value |
|---|---|
| SoftStep volume/gain control | Programmable blend times prevent audible zipper noise during real-time EQ adjustments in moving vehicles. |
| Independent 2nd-order bass/middle/treble filters | Each band offers discrete center frequency, Q factor, and ±15 dB gain control - enables precise tonal sculpting without inter-band interaction. |
| Dual-path mute architecture | Main/Sub channel mute (0.5–16 ms) and per-speaker mute (4–64 ms) allow staged silencing for system boot-up or fault recovery. |
| AC coupling support | Three AC-coupled inputs (QD2–QD3, ACIN0–ACIN2) and one AC-coupled output (ACOUTL/R) eliminate DC bias in mixed-signal chains. |
| Integrated HPF/LPF filtering | Two stereo high-pass filters (output0/output1) and one mono low-pass filter (output2) reduce external component count in multi-zone designs. |
Applications
| Automotive Head Unit | Multi-Zone Infotainment System |
|---|---|
|
Use Scenario: OEM dashboard-mounted radio with AM/FM, Bluetooth, and USB sources feeding front/rear speakers and subwoofer. IC Role / Device Role / Timing Role: Central audio processor managing input routing, 3-band EQ, channel mixing, and speaker-level gain staging before internal/external amplification. Use Value: Enables factory-tuned sound profiles per vehicle trim level using programmable filter coefficients stored in MCU memory. |
Use Scenario: Premium infotainment platform delivering independent audio zones (driver, front passenger, rear seat) with distinct EQ and volume settings. IC Role / Device Role / Timing Role: Signal distributor and tone shaper - routes inputs to multiple output paths while applying zone-specific bass boost and treble lift. Use Value: Six independent SoftStep speaker controls allow synchronized fade-in/fade-out across zones without cross-channel artifacts. |
| Aftermarket Car Stereo | Compact Subwoofer Management Module |
|
Use Scenario: High-fidelity aftermarket receiver supporting 4-channel front/rear processing plus dedicated subwoofer output. IC Role / Device Role / Timing Role: Tone processor and subwoofer driver - applies loudness compensation, bass extension, and mono LPF before sending signal to external sub amp. Use Value: Programmable 50–120 Hz low-pass cutoff ensures tight integration with enclosure-specific sub response curves. |
Use Scenario: Standalone module inserted between head unit and powered subwoofer to add active crossover and protection logic. IC Role / Device Role / Timing Role: Dedicated low-frequency conditioner - performs mono low-pass filtering, DC offset monitoring, and SoftMute ramping for subwoofer safety. Use Value: DCERR pin provides fail-safe shutdown signal to sub amp when amplifier rail fault is detected - prevents voice coil damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar car audio processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7719 | Same pinout and register map; higher supply voltage rating (up to 18 V) and extended temperature range (–40°C to 105°C). | Targeted at commercial-grade or under-hood amplifier modules where thermal stress exceeds standard automotive ambient limits. | Select TDA7719 when operating above 85°C ambient or requiring enhanced transient immunity beyond 13 V supply rails. |
| STA333BW | DSP-based 3-channel digital audio processor with integrated Class D amplifier drivers; no analog filter banks or SoftStep analog gain stages. | Used in cost-sensitive, space-constrained designs where digital signal path and embedded amplification replace discrete analog processing. | Choose STA333BW only if system architecture shifts to fully digital audio chain and eliminates need for analog EQ precision or legacy I²C register compatibility. |
Compared with TDA7715LV, TDA7719 extends operational margins for harsh environments while maintaining full software compatibility, whereas STA333BW replaces analog filter flexibility with digital programmability and integrated power stages - making it unsuitable for drop-in replacement but viable for ground-up digital audio system redesigns.
Availability
TDA7715LV is available at Aetrix Electronics and suitable for automotive head units, multi-zone infotainment systems, and aftermarket car stereo platforms requiring stable component supply, long-term lifecycle support, and consistent electrical performance across production batches.
Supply support for TDA7715LV 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-grade analog and power ICs, with broad expertise in audio signal processing and high-reliability embedded solutions.
The TDA7715LV belongs to ST's automotive audio processor product line, designed specifically for cost-optimized, feature-rich car radio platforms needing flexible analog EQ, robust mute sequencing, and diagnostic-ready amplifier interfacing.
FAQ
What is the maximum allowable supply voltage for TDA7715LV?
The absolute maximum supply voltage is 13 V, with recommended operating range from 4.5 V to 12.5 V. Exceeding 13 V risks permanent damage to internal ESD structures and analog front-end circuitry, as specified in Table 4 of DocID025456 Rev 1.
Does TDA7715LV support simultaneous operation of all input sources?
No - the input multiplexer selects only one active stereo pair at a time (e.g., SE0 or QD1), though up to nine total inputs (five SE + four QD) are physically present. Source switching is performed via I²C register writes to the input selector block (subaddress 0x01).
How does the DC offset detection circuit function in practice?
The DCERR pin asserts low when internal comparators detect >±100 mV DC shift at PA0L/PA0R/PA1L/PA1R outputs; WININ accepts external amplifier output for monitoring, while WINTCL/WINTCR provide filtered versions for left/right channels - used to trigger safe shutdown in amplifier fault conditions.
Can the loudness function be disabled to use flat frequency response?
Yes - the loudness block includes a selectable flat-mode (constant attenuation) setting that bypasses frequency-dependent boosting, delivering uniform 15 dB attenuation across all frequencies - verified in Section 4.3.4 and Figure 4 of the datasheet.
TDA7715LV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Fully Integrated Processor
- Applications:
- Pre-Amplifier
- Number of Channels:
- 2
- Interface:
- I2C
- Voltage - Supply:
- 4.5V ~ 12.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Specifications:
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
TDA7715LV FAQ
1.How can I place an order for TDA7715LV through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7715LV 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 TDA7715LV reliable?
The price and inventory of TDA7715LV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7715LV is usually 5 days.
3.What payment methods are accepted for TDA7715LV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7715LV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7715LV?
TDA7715LV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7715LV 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 TDA7715LV?
For technical support, including TDA7715LV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7715LV requirements.
6.How does Aetrix verify that TDA7715LV is sourced from the original manufacturer or authorized distributors?
All TDA7715LV 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 TDA7715LV meets industry standards.
7.What is the process for return or replacement of TDA7715LV?
All TDA7715LV units undergo pre-shipment inspection (PSI). If there is an issue with TDA7715LV, 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 TDA7715LV part is unused and in its original packaging.
Return procedure for TDA7715LV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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