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STMicroelectronics TDA7718NTR
- Part No.:
- TDA7718NTR
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TDA7718NTR.pdf
- Description:
- IC AUDIO SIGNAL PROCESSR 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,577
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Product details
Overview
TDA7718NTR from STMicroelectronics is a 3-band car audio signal processor IC with integrated loudness, bass/middle/treble equalization, subwoofer low-pass filtering, and soft-step speaker controls. It features TSSOP28 packaging, I²C digital control, 23–29 mA supply current at 8.5 V, and supports quasi-differential, full-differential, and up to five stereo single-ended inputs for automotive head unit signal routing.
For engineers reviewing the TDA7718NTR datasheet, TDA7718NTR pinout, TDA7718NTR application, or TDA7718NTR equivalent, this device is selected for high-fidelity analog audio conditioning in OEM car radios where programmable EQ, DC offset fault detection, and multi-source input multiplexing are required.
Technical Context
The TDA7718NTR implements a fully configurable analog audio processing chain with independent 2nd-order biquad filters for bass (60–200 Hz), middle (500 Hz–2.5 kHz), and treble (10–17.5 kHz), each offering programmable center frequency, Q factor, and ±15 dB gain/attenuation in 1 dB steps. Loudness compensation uses selectable peak frequencies (400/800/2400 Hz) and flat-mode operation.
It integrates a 4-channel soft-step speaker attenuator (+15 dB to –79 dB), dual subwoofer outputs with programmable low-pass cutoff (55/85/120/160 Hz), and a dedicated DC offset detector circuit that monitors amplifier output rails and asserts DC_ERR upon fault detection - critical for automotive power stage diagnostics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 7.5–10 V: Supports automotive battery range including cold-crank (7.5 V) and load-dump transients (10 V). |
| Supply Current | 23–29 mA @ 8.5 V: Enables low-power operation in always-on infotainment systems without thermal derating. |
| Input Impedance | 100 kΩ (SE/QD), 70–100 kΩ (FD): Matches standard line-level sources and minimizes loading on preamp stages. |
| THD+N | 0.01–0.1 % @ 1 VRMS: Ensures clean signal path for high-SNR audio reproduction in cabin environments. |
| SNR | 98–104 dB A-weighted: Meets OEM requirements for quiet background noise floor in premium audio systems. |
| Output Noise | 12–22 µV A-weighted: Low-noise design avoids audible hiss in amplified speaker channels. |
| DC Offset Detection | ±10–±130 mV window thresholds with 2–70 µs spike rejection: Enables reliable diagnosis of failed external power amplifiers. |
Pinout & Package
TSSOP28 package: 4.4 mm × 9.7 mm body, 0.65 mm pitch, thermally enhanced for automotive ambient (–40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SE1L–SE3R (Pins 1–6) | Stereo single-ended inputs | Accept line-level signals from tuner, Bluetooth module, or USB DAC; 100 kΩ input impedance, –3 dB fixed attenuation. |
| QD1L/QD1G/QD1R (Pins 7–9) | Quasi-differential stereo input | Rejects common-mode noise from long cable runs; buffered stage with 100 kΩ per input. |
| FD1L+/FD1L−/FD1R+/FD1R− (Pins 10–13) | Full-differential stereo input or SE4/SE5 | Configurable via I²C: either high-CMRR differential input (70–100 kΩ) or two additional single-ended inputs. |
| OUTLF–OUTRR, OUTSWL–OUTSWR (Pins 16–21) | Analog audio outputs | Drive external Class AB/D power amps; 30–100 Ω output impedance, 2–2.2 VRMS clipping level. |
| SCL/SDA (Pins 25–26) | I²C interface | Enables real-time filter coefficient updates, mute timing selection, and diagnostic register reads at 400 kHz. |
| DC_ERR / WIN_IN / WinTC (Pins 27–28, 22) | DC offset detection interface | WIN_IN connects to power amp output; WinTC sets time constant; DC_ERR asserts open-drain fault flag. |
Key Features
| Feature | Design Value |
|---|---|
| SoftStep volume control | +23 dB to –31 dB range with 1 dB resolution and programmable blend times prevents audible zipper noise during fade transitions. |
| Programmable loudness | Four selectable center frequencies (400/800/2400 Hz) and 15 dB boost with 1 dB steps enable psychoacoustic compensation at low listening volumes. |
| Independent speaker attenuation | Four front/rear/surround channels plus dual subwoofer paths, each with +15 dB to –79 dB soft-step control for precise cabin sound staging. |
| Dual subwoofer processing | Separate 2nd-order low-pass filters (55/85/120/160 Hz cutoff) and individual level controls support active 2.1 or 4.1 configurations. |
| DC offset fault detection | Hardware-based monitoring with four adjustable voltage windows and spike rejection up to 70 µs enables fail-safe diagnosis without MCU intervention. |
Applications
| Automotive Head Unit | OEM Infotainment System |
|---|---|
Use Scenario: Integrated audio processor in factory-installed car radio with AM/FM, Bluetooth, and USB playback. IC Role / Device Role / Timing Role: Central analog signal conditioner managing input source selection, loudness compensation, and multi-zone speaker drive. Use Value: Eliminates need for external op-amp EQ networks and discrete mute logic, reducing BOM count by ≥7 components. |
Use Scenario: High-end vehicle infotainment platform supporting rear-seat entertainment and voice assistant audio routing. IC Role / Device Role / Timing Role: Audio hub coordinating signal flow between SoC audio interfaces, DSP firmware, and multi-channel amplifier subsystems. Use Value: I²C programmability allows over-the-air EQ profile updates and adaptive loudness tuning based on vehicle speed data. |
| Aftermarket Car Stereo | Marine Audio Controller |
Use Scenario: Compact aftermarket receiver with digital input support and customizable tone controls. IC Role / Device Role / Timing Role: Analog front-end processor handling legacy RCA inputs while enabling modern digital feature integration. Use Value: Quasi-differential and full-differential inputs reject engine noise and alternator ripple in non-shielded harnesses. |
Use Scenario: Waterproof marine audio system requiring robust fault detection in corrosive, high-vibration environments. IC Role / Device Role / Timing Role: Fault-monitoring audio processor ensuring safe shutdown of power amplifiers upon DC rail drift. Use Value: Hardware DC_ERR assertion triggers immediate mute and alerts MCU before speaker damage occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar car audio processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7719NTR | Includes 5-band EQ (adds presence and air bands), higher SNR (106 dB), but no DC offset detection circuit. | Lacks hardware-level amplifier fault diagnosis; requires external comparator for DC monitoring. | Select when extended high-frequency shaping is needed and fault detection is handled at system level. |
| STA333BW | Digital-input-only (I²S/PCM), integrated Class D amplifier drivers, no analog input multiplexer or DC detection. | Requires upstream DAC; unsuitable for analog source consolidation or amplifier health monitoring. | Choose only for all-digital signal chains where analog input flexibility and fault safety are not required. |
Compared with TDA7718NTR, TDA7719NTR extends tonal control but sacrifices built-in failure diagnostics, while STA333BW shifts architecture to digital domain - making TDA7718NTR uniquely suited for analog-source-rich, safety-critical automotive audio nodes.
Availability
TDA7718NTR is available at Aetrix Electronics and suitable for automotive head units, OEM infotainment systems, and aftermarket car stereos requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TDA7718NTR 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 portfolio coverage from microcontrollers to audio processors and power management solutions.
The TDA7718NTR belongs to ST's TDA7xxx automotive audio processor family, designed specifically for cost-sensitive yet feature-rich car radio platforms requiring analog signal conditioning, programmable EQ, and amplifier protection functions.
FAQ
What input configurations does the TDA7718NTR support?
The TDA7718NTR supports three input topologies: one quasi-differential stereo pair (QD1), one full-differential stereo pair (FD1) configurable also as two single-ended inputs (SE4/SE5), and three additional stereo single-ended inputs (SE1–SE3), totaling up to five stereo sources. Input selection is controlled via I²C registers, and all paths include –3 dB fixed attenuation and 100 kΩ input impedance except FD1, which offers 70–100 kΩ.
How does the DC offset detection function operate?
The DC offset detector monitors voltage at WIN_IN (Pin 28) against four user-selectable threshold windows (±10 mV to ±130 mV). When deviation exceeds the chosen window for longer than the configured spike rejection time (2–70 µs), DC_ERR (Pin 27) asserts low. WinTC (Pin 22) sets the RC time constant for filtering transient spikes, enabling reliable detection of amplifier rail failures without false triggers from ignition noise.
Can the TDA7718NTR drive speakers directly?
No - the TDA7718NTR is an audio signal processor, not a power amplifier. Its six analog outputs (OUTLF, OUTRF, OUTLR, OUTRR, OUTSWL, OUTSWR) are line-level (2–2.2 VRMS clipping, 30–100 Ω output impedance) and must interface with external Class AB or Class D power amplifiers. It provides soft-step attenuation and mute control for those downstream amplifiers but delivers no power-stage current capability.
What is the purpose of the SoftMute feature and its timing options?
SoftMute provides digitally controlled, glitch-free muting with four programmable decay times: 0.48 ms, 0.96 ms, 8 ms, and 16 ms. This prevents audible pop/click during source switching, power-up/down, or fault conditions. The shortest times suit fast digital transitions (e.g., Bluetooth pairing), while longer times ensure smooth fade-out in navigation voice prompts or phone call handover - all implemented in hardware without MCU timing dependency.
TDA7718NTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Audio Signal Processor
- Applications:
- Audio
- Number of Channels:
- 3
- Interface:
- I2C
- Voltage - Supply:
- 7.5V ~ 10V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Specifications:
- -
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
TDA7718NTR FAQ
1.How can I place an order for TDA7718NTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7718NTR 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 TDA7718NTR reliable?
The price and inventory of TDA7718NTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7718NTR is usually 5 days.
3.What payment methods are accepted for TDA7718NTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7718NTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7718NTR?
TDA7718NTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7718NTR 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 TDA7718NTR?
For technical support, including TDA7718NTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7718NTR requirements.
6.How does Aetrix verify that TDA7718NTR is sourced from the original manufacturer or authorized distributors?
All TDA7718NTR 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 TDA7718NTR meets industry standards.
7.What is the process for return or replacement of TDA7718NTR?
All TDA7718NTR units undergo pre-shipment inspection (PSI). If there is an issue with TDA7718NTR, 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 TDA7718NTR part is unused and in its original packaging.
Return procedure for TDA7718NTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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