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STMicroelectronics TDA7786M
- Part No.:
- TDA7786M
- Manufacturer:
- STMicroelectronics
- Category:
- RF Receivers
- Package:
- 64-LQFP
- Datasheet:
-
TDA7786M.pdf
- Description:
- RF RECEIVER AM/FM/WB 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,027
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Product details
Overview
TDA7786M from STMicroelectronics is an AEC-Q100-qualified automotive AM/FM/WX tuner IC with integrated VCO, high-performance PLL, digital IF processing, RDS demodulation, stereo decoding, and MuSICA multipath noise reduction algorithm. It operates from a single 5 V supply in LQFP64 package and enables HD Radio™ reception via I2S interface in car-radio head units.
For engineers reviewing the TDA7786M datasheet, TDA7786M pinout, TDA7786M application, or TDA7786M equivalent, key selection considerations include FM multipath immunity (MuSICA), RDS group synchronization accuracy, adaptive IF bandwidth control, and I2C-configurable digital audio blending for hybrid analog/digital radio systems.
Technical Context
The TDA7786M implements a fully integrated digital IF architecture with dual-path ADCs feeding a programmable DSP core that executes real-time channel filtering, stereo decoding, and RDS block synchronization. Its PLL synthesizer achieves <100 Hz frequency resolution with <20 ms tuning time across global FM/AM/WX bands.
It integrates dedicated analog front-end blocks: AM LNA with configurable gain and dual AGC time constants, FM mixer with PIN diode drivers, and crystal oscillator with internal load capacitance. The MuSICA algorithm operates on digitized IF samples to suppress multipath-induced distortion without requiring external signal path modification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| AEC-Q100 Grade | Grade 2 (−40 °C to +105 °C ambient), qualified for under-hood automotive deployment |
| Frequency Range | FM: 76–108 MHz; AM MW: 520–1710 kHz; WX: 162–163 MHz - supports worldwide broadcast standards |
| RDS Performance | Group synchronization error < ±1 symbol; block sync recovery within 300 ms after signal loss |
| Digital IF Resolution | 16-bit IF ADC with >90 dB SNR; adaptive bandwidth control from 100 kHz to 400 kHz |
| MuSICA Algorithm | Real-time FM multipath mitigation enabling <25 dB echo rejection at 5 µs delay |
| Supply Voltage | Single 5 V rail (VCCRF, Vdig, VCCreg1V2) - eliminates need for multi-rail power design |
| Digital Interfaces | I2C control (400 kHz fast-mode); I2S audio I/O (16/20/24/32-bit, 32–48 kHz sample rates) |
Pinout & Package
LQFP64 (10 × 10 × 1.4 mm) package with exposed thermal pad; RoHS-compliant, automotive-grade molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FMPINDRV | FM PIN diode driver output | Drives external FM antenna switching diodes; open-drain, 5 V tolerant |
| 2 FMPINDdec | FM PIN diode decoupling input | Internal AC coupling node for FM RF path stability |
| 8 VCCRF | RF power supply | 5 V dedicated rail for RF front-end blocks; requires local 100 nF + 10 µF decoupling |
| 18 LNAin | AM LNA input | High-impedance input for AM antenna; supports ferrite rod or loopstick configurations |
| 33 SDA | I2C bidirectional data line | Open-drain, 3.3 V logic level; internal 50 kΩ pull-up to Vreg3v3 |
| 34 SCL | I2C clock input | 5 V tolerant; supports standard/fast-mode timing per I2C spec |
| 32 RDSINT | RDS interrupt output | Active-low open-drain flag signaling RDS group lock or error condition |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MuSICA algorithm | Hardware-accelerated FM multipath cancellation without host CPU overhead or firmware update dependency |
| Self-aligning FM front-end | Automatic calibration of pre-selection filter center frequency and image rejection ratio during power-up |
| Digital IF with adaptive bandwidth | Real-time IF filter reconfiguration based on received signal strength and adjacent channel interference |
| HD Radio™ baseband interface | Dual I2S ports enable simultaneous analog audio output and digital IBOC baseband streaming to external decoder |
| Single-supply operation | All analog and digital sections powered from one 5 V rail - reduces BOM count and PCB area vs. multi-rail tuners |
Applications
| Automotive Infotainment Head Unit | HD Radio™ Hybrid Receiver |
|---|---|
Use Scenario: Integrated car stereo system requiring AM/FM/WX reception with RDS traffic announcements and station logos. IC Role / Device Role / Timing Role: Primary tuner IC handling RF-to-digital conversion, stereo decoding, and RDS parsing; synchronized to system master clock via I2S WS. Use Value: Eliminates discrete IF filters and analog stereo decoders; MuSICA ensures stable audio in urban multipath environments. |
Use Scenario: OEM radio platform supporting both legacy analog and digital HD Radio™ broadcasts. IC Role / Device Role / Timing Role: Analog tuner front-end and digital baseband source; delivers IBOC FM/AM baseband samples via I2S to external HD decoder ASIC. Use Value: Enables seamless audio blending between analog and digital streams using built-in digital audio mixing logic. |
| Aftermarket Navigation Radio | Commercial Fleet Telematics Terminal |
Use Scenario: Compact aftermarket unit integrating GPS, Bluetooth, and broadcast radio in limited board space. IC Role / Device Role / Timing Role: High-integration tuner providing all RF, IF, and audio functions; interfaces to SoC via I2C and I2S. Use Value: Reduces external component count by >40% vs. discrete tuner + decoder solutions; LQFP64 simplifies layout routing. |
Use Scenario: Ruggedized telematics device deployed in delivery vans and service vehicles requiring reliable broadcast reception. IC Role / Device Role / Timing Role: AEC-Q100 qualified tuner delivering RDS-based fleet messaging and weather alerts (WX band). Use Value: Guaranteed operation at 105 °C ambient; integrated AM LNA enables reliable MW/LW reception in electrically noisy vehicle cabins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AM/FM tuner applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7786 | No MuSICA algorithm; identical pinout, register map, and I2C/I2S interface | Lower FM multipath immunity; suitable for cost-sensitive non-urban deployments | Select when MuSICA is not required and BOM cost optimization is prioritized |
| Si4790x series (Skyworks) | Software-defined radio architecture; wider frequency range (150 kHz–300 MHz); no integrated AM LNA | Requires external AM front-end; supports DAB/DAB+/DMB; higher host processor dependency | Choose for multi-standard (DAB+FM) platforms needing field-upgradable features |
Compared with TDA7786M, the TDA7786 omits MuSICA but retains full software compatibility, while Si4790x offers broader band coverage and DAB support at the cost of added system complexity and external component requirements.
Availability
TDA7786M is available at Aetrix Electronics and suitable for automotive infotainment head units, HD Radio™ hybrid receivers, and commercial fleet telematics terminals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TDA7786M 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, specializing in automotive, industrial, and power management ICs with broad analog/mixed-signal portfolio.
The TDA7786M belongs to ST's ELITE automotive tuner family, designed specifically for high-fidelity, AEC-Q100-compliant broadcast reception in space-constrained car-radio systems with emphasis on robustness in multipath and weak-signal conditions.
FAQ
Does the TDA7786M require an external crystal oscillator?
No. The TDA7786M integrates a crystal oscillator circuit with internal load capacitance optimized for standard 32.768 kHz or 13 MHz crystals. External crystal and two load capacitors are required, but no separate oscillator IC is needed. The oscillator supports automatic startup calibration and maintains ±100 ppm frequency stability over temperature.
How does MuSICA differ from conventional FM multipath mitigation techniques?
MuSICA is a proprietary ST algorithm implemented in dedicated DSP hardware that analyzes time-domain IF samples to identify and cancel delayed signal replicas in real time. Unlike analog notch filters or post-decoding audio processing, MuSICA operates before stereo demodulation, preserving stereo separation and reducing "picket fencing" artifacts without introducing latency or degrading SNR in clean-signal conditions.
Can the TDA7786M decode HD Radio™ signals internally?
No. The TDA7786M provides digital baseband IBOC (In-Band On-Channel) output via its I2S interface but does not perform HD Radio™ decoding. It delivers sampled FM/AM IBOC waveforms to an external HD Radio™ decoder IC (e.g., NXP SAF356x), enabling hybrid analog/digital playback with seamless audio blending controlled via I2C registers.
What is the function of the RDSINT pin, and how is it used in system design?
RDSINT is an active-low open-drain interrupt output signaling RDS events: group lock acquisition, block synchronization loss, or PI code change. It connects directly to a GPIO on the host microcontroller, eliminating polling overhead. Internal 50 kΩ pull-down ensures defined state during reset; external pull-up to 3.3 V is required for proper logic-level detection.
TDA7786M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Frequency:
- AM, FM, WB
- Sensitivity:
- -
- Data Rate (Max):
- -
- Modulation or Protocol:
- AM, FM, WB
- Applications:
- General Purpose
- Current - Receiving:
- 175mA
- Data Interface:
- I2C, I2S
- Memory Size:
- -
- Antenna Connector:
- PCB, Surface Mount
- Features:
- RDS Demodulator + Band Pass Filter
- Voltage - Supply:
- 4.7V ~ 5.2V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-LQFP (10x10)
TDA7786M FAQ
1.How can I place an order for TDA7786M through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7786M 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 TDA7786M reliable?
The price and inventory of TDA7786M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7786M is usually 5 days.
3.What payment methods are accepted for TDA7786M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7786M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7786M?
TDA7786M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7786M 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 TDA7786M?
For technical support, including TDA7786M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7786M requirements.
6.How does Aetrix verify that TDA7786M is sourced from the original manufacturer or authorized distributors?
All TDA7786M 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 TDA7786M meets industry standards.
7.What is the process for return or replacement of TDA7786M?
All TDA7786M units undergo pre-shipment inspection (PSI). If there is an issue with TDA7786M, 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 TDA7786M part is unused and in its original packaging.
Return procedure for TDA7786M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TDA7786M Tags
-
MICRF220AYQS-TR
Microchip Technology
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SX1239IMLTRT
Semtech Corporation
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SI4356-B1A-FMR
Silicon Labs
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SI4362-C2A-GMR
Silicon Labs
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MAX1473EUI+T
Analog Devices Inc./Maxim Integrated
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CMX992Q3
CML Micro
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CMX994AQ4
CML Micro
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MAX2112ETI+
Analog Devices Inc./Maxim Integrated
-
MAX2112ETI+T
Analog Devices Inc./Maxim Integrated
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TESEO-LIV3R
STMicroelectronics
-
M20048-1
Antenova
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CMX994EQ4
CML Micro
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