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STMicroelectronics TDA7786TR
- Part No.:
- TDA7786TR
- Manufacturer:
- STMicroelectronics
- Category:
- RF Receivers
- Package:
- 64-LQFP
- Datasheet:
-
TDA7786TR.pdf
- Description:
- RF RECEIVER AM/FM 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,501
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Product details
Overview
TDA7786TR from STMicroelectronics is an AEC-Q100-qualified automotive AM/FM/Weather band tuner IC with integrated VCO, high-performance PLL, digital IF processing, RDS demodulation, and stereo decoding. It supports HD Radio™ baseband filtering via digital interface, operates from a single 5 V supply, and delivers drift-free reception in LQFP64 package for car-radio head units.
For engineers reviewing the TDA7786TR datasheet, TDA7786TR pinout, TDA7786TR application, or TDA7786TR equivalent, key selection criteria include FM multipath immunity (MuSICA algorithm not in TR variant), I²S/I²C interface compatibility, analog/digital audio path configuration, and AEC-Q100 compliance for automotive deployment.
Technical Context
The TDA7786TR implements a fully integrated digital IF architecture with adaptive bandwidth control, high-selectivity digital filters, and automatic self-alignment of FM front-end pre-selection and image rejection. Its PLL synthesizer enables world-wide tuning with integrated VCO and crystal oscillator support.
It integrates dual-path signal chains: FM section includes LNA, mixers, AGC, and stereo decoder with noise-blanker; AM section features dedicated LNA, PIN diodes, and multi-band (MW/LW/SW) IF processing. Digital interfaces include I²S (16/24/32-bit) and I²C for register control and HD Radio™ baseband data exchange.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | Single 5 V rail powers RF, analog, and digital sections - eliminates need for multiple regulators in automotive head unit designs. |
| FM Sensitivity | 1.5 µV (typ.) at 30 dB S+N/N - enables reliable weak-signal reception in urban multipath environments. |
| AM Selectivity | ≥ 55 dB (adjacent channel) - suppresses interference from nearby AM stations without external filter components. |
| RDS Performance | Group/block synchronization with ≤ 100 ms lock time - ensures fast station identification and traffic announcement parsing. |
| Digital Audio Interface | I²S input/output supporting 32/24/20/16-bit formats at 32–48 kHz - interoperable with common DSPs and audio codecs. |
| Operating Temperature | −40 °C to +105 °C - meets AEC-Q100 Grade 2 requirements for under-dash automotive mounting. |
| IF Processing | Fully digital-down-converted (DDC) IF with adaptive bandwidth - eliminates analog IF transformers and manual alignment. |
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 - enables diversity or band-switching without discrete driver IC. |
| 18 (LNAin) | AM LNA Input | High-impedance RF input for AM antenna - optimized for MW/LW/SW bands with integrated bias and decoupling. |
| 33 (SDA) | I²C Data Bidirectional | Open-drain I²C bus line with internal 50 kΩ pull-up - supports standard-mode (100 kHz) and fast-mode (400 kHz) control. |
| 34 (SCL) | I²C Clock Input | Master-generated clock for register read/write - synchronized with internal PLL timing for glitch-free configuration. |
| 31 (RSTN) | Active-Low Reset Input | Asynchronous reset with internal 50 kΩ pull-up to 3.3 V - ensures deterministic startup after power-on or brownout. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic FM Front-End Alignment | Self-calibrates pre-selection filter and image rejection in real time - removes factory tuning labor and aging drift compensation. |
| Digital IF with Adaptive Bandwidth | Configurable IF filter shape and bandwidth per channel - maintains SNR across varying interference conditions without hardware change. |
| Integrated AM LNA + PIN Diodes | On-chip low-noise amplifier and AGC-controlled PIN switch network - reduces BOM count and PCB area vs. discrete AM front-end. |
| RDS Demodulation Engine | Hardware-accelerated group/block sync and error correction - offloads host MCU and guarantees sub-second RDS data availability. |
| HD Radio™ Baseband Interface | Dedicated SAI_BB digital interface for IBOC-FM/AM baseband output - enables external HD decoder without modifying analog signal path. |
Applications
| Automotive Infotainment Head Unit | Digital Car Radio Receiver |
|---|---|
|
Use Scenario: Integrated radio module in OEM dashboard system requiring AM/FM/Weather band reception with RDS and HD Radio™ readiness. IC Role / Device Role / Timing Role: Primary tuner IC handling RF-to-digital conversion, stereo decoding, and RDS parsing - synchronizes audio output with vehicle CAN bus clock via I²S sample rate control. Use Value: Single-chip solution reduces component count by >30% vs. legacy analog tuners and eliminates manual IF alignment during manufacturing. |
Use Scenario: Aftermarket digital radio platform supporting global band plans (US/EU/Japan) and firmware-upgradable features. IC Role / Device Role / Timing Role: Core RF front-end with programmable PLL and digital IF - provides stable reference clock (via OSCOUT) and configurable I²S format for flexible audio processor pairing. Use Value: World-tuning capability via software-configurable VCO and PLL registers enables one hardware design for multiple regional SKUs. |
| HD Radio™-Enabled Tuner Module | AM/FM Diversity Reception System |
|
Use Scenario: Hybrid analog/digital receiver where analog path delivers main audio while HD Radio™ baseband feeds external decoder for supplemental content. IC Role / Device Role / Timing Role: Dual-output tuner providing analog audio (DAC outputs) and digital baseband (SAI_BB) simultaneously - maintains phase coherence between paths using shared DDC clock. Use Value: Enables seamless audio blending between analog and HD streams without external resampling or latency matching circuitry. |
Use Scenario: High-reliability mobile radio in emergency vehicles requiring robust FM reception under severe multipath (tunnels, urban canyons). IC Role / Device Role / Timing Role: FM tuner with integrated PIN diode drivers (FMPINDRV/FMPINDdec) and LNA decoupling - interfaces directly with dual-antenna diversity switch network. Use Value: On-chip RF switching control and automatic front-end alignment reduce sensitivity loss during antenna handover to <1.5 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AM/FM automotive tuner applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si4790x Series (Skyworks) | Software-defined radio architecture with wider frequency range (150 kHz–30 MHz); no integrated AM LNA or PIN diodes. | Requires external AM front-end and antenna switches; better suited for ultra-compact designs needing SW/LW/AM/FM/WX in one chip. | Select when flexibility across non-standard bands (e.g., aviation weather) outweighs integration density and AEC-Q100 qualification confidence. |
| TDA7706 (STMicroelectronics) | Legacy 48-pin QFN tuner; lacks digital IF, RDS hardware engine, and HD Radio™ interface - relies on host MCU for demodulation. | Lower BOM cost but higher host processing load; limited to basic analog radio functions without firmware upgrade path. | Select only for cost-sensitive entry-level radios where RDS, HD Radio™, and multipath resilience are non-critical. |
Compared with Si4790x and TDA7706, the TDA7786TR offers superior integration (on-die AM LNA, FM PIN drivers, RDS engine), guaranteed automotive qualification, and production-proven digital IF stability - making it optimal for Tier-1 infotainment systems requiring zero-field recalibration and long-term supply continuity.
Availability
TDA7786TR is available at Aetrix Electronics and suitable for automotive infotainment head units, digital car radio receivers, and HD Radio™-enabled tuner modules requiring stable component supply, AEC-Q100 compliance, and long-lifecycle support.
Supply support for TDA7786TR 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 broad manufacturing scale and automotive qualification expertise.
The TDA7786TR belongs to ST's ELITE automotive tuner family - engineered specifically for high-fidelity, low-BOM-count car-radio systems demanding AEC-Q100 reliability, digital IF precision, and seamless HD Radio™ integration.
FAQ
Is the TDA7786TR pin-compatible with the TDA7786M?
Yes - both share identical LQFP64 pinout, register map, and electrical interface specifications. The TDA7786M adds MuSICA multipath reduction firmware, but hardware compatibility allows drop-in replacement in existing PCB layouts without redesign.
Does the TDA7786TR support HD Radio™ decoding internally?
No - it provides digital baseband output (SAI_BB interface) for external HD Radio™ decoders only. Internal processing is limited to analog AM/FM/Weather band reception, RDS, and stereo decoding; HD Radio™ requires companion IC such as the Si46xx or ST's own HD decoder ASIC.
What crystal frequency is required for the TDA7786TR?
A 32.768 kHz crystal is used for the internal real-time clock and system timing reference; a 13 MHz or 26 MHz crystal (per application note AN4745) drives the PLL/VCO for RF synthesis - both are supported via dedicated OSCIN/OSCOUT pins.
Can the TDA7786TR operate without an external microcontroller?
No - it requires I²C initialization and runtime control for channel tuning, audio settings, and RDS configuration. While it contains autonomous blocks (e.g., PLL lock, AGC), all functional modes must be configured via host MCU; no standalone operation mode exists.
TDA7786TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Frequency:
- AM, FM, WB
- Sensitivity:
- -
- Data Rate (Max):
- -
- Modulation or Protocol:
- AM, FM
- 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)
TDA7786TR FAQ
1.How can I place an order for TDA7786TR through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7786TR 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 TDA7786TR reliable?
The price and inventory of TDA7786TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7786TR is usually 5 days.
3.What payment methods are accepted for TDA7786TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7786TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7786TR?
TDA7786TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7786TR 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 TDA7786TR?
For technical support, including TDA7786TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7786TR requirements.
6.How does Aetrix verify that TDA7786TR is sourced from the original manufacturer or authorized distributors?
All TDA7786TR 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 TDA7786TR meets industry standards.
7.What is the process for return or replacement of TDA7786TR?
All TDA7786TR units undergo pre-shipment inspection (PSI). If there is an issue with TDA7786TR, 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 TDA7786TR part is unused and in its original packaging.
Return procedure for TDA7786TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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MICRF220AYQS-TR
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MAX2112ETI+
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MAX2112ETI+T
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