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STMicroelectronics TDA7708CBTR
- Part No.:
- TDA7708CBTR
- Manufacturer:
- STMicroelectronics
- Category:
- RF Receivers
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
TDA7708CBTR.pdf
- Description:
- RF RX AM/FM/RDS 108MHZ 64VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,542
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Product details
Overview
TDA7708CBTR from STMicroelectronics is an AEC-Q100-qualified, automotive-grade AM/FM/HD-Radio™ tuner IC with digital IF processing, 36.864 MHz crystal oscillator input, I²S digital audio output, and integrated RDS demodulation. It operates from 3.15–3.45 V supply, supports −40 °C to +85 °C ambient, and integrates multipath noise mitigation for high-fidelity terrestrial radio reception in vehicle infotainment systems.
For engineers reviewing the TDA7708CBTR datasheet, TDA7708CBTR pinout, TDA7708CBTR application, or TDA7708CBTR equivalent, key selection criteria include its low-IF DSP architecture, 350 mA typical supply current at 108 MHz FM, VFQFPN64 (9 × 9 × 1.0 mm) package, HD-Radio™ compatibility via external STA680 co-processor, and RDS group/block synchronization capability.
Technical Context
The TDA7708CBTR implements a low-IF, DSP-based RF tuner architecture with on-chip quadrature ADC (very high dynamic range), integrated PLL/VCO, and dedicated front-end LNAs covering AM LW/MW/SW and full FM bands. Its digital baseband processor handles multipath mitigation, RDS decoding, and HD-Radio™ channel filtering.
It requires external 36.864 MHz crystal oscillator input and boots via minimal firmware download over I²C/SPI - enabling integration into microcontroller-constrained automotive head units. Audio output is delivered as I²S-format digital stream, eliminating need for external DAC in many designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.15–3.45 V - ensures stable operation across automotive battery transients (ISO 16750-2 compliant) |
| Supply Current | 350 mA typ @ 108 MHz FM - defines thermal budget and power supply sizing for head unit PCB |
| Ambient Temp Range | −40 °C to +85 °C - meets automotive cabin temperature requirements without derating |
| Digital Audio Output | I²S interface - enables direct connection to SoC or audio DSP without analog conversion stage |
| RDS Support | Group and block synchronization - delivers accurate station ID, traffic announcements, and program type metadata |
| HD-Radio™ Compatibility | Requires external STA680 co-processor - enables full hybrid digital/AM-FM receiver with single-chip RF front-end |
| ESD Rating | ±2000 V HBM - satisfies automotive ESD immunity requirements per ISO 10605 |
Pinout & Package
VFQFPN64 (9 × 9 × 1.0 mm) package with exposed thermal pad; RoHS-compliant, MSL Level 3, JEDEC J-STD-020D compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Core supply input | 3.3 V main power rail for analog/digital sections; decoupling required per layout guidelines |
| GND | Ground reference | Common return for analog, digital, and RF domains; thermal pad must be soldered to PCB ground plane |
| XTAL_IN / XTAL_OUT | Crystal oscillator interface | 36.864 MHz fundamental-mode crystal connection; internal load caps reduce external component count |
| I2S_WS / I2S_SCK / I2S_SD | Digital audio output | Standard I²S timing and data lines - compatible with most automotive SoCs and audio processors |
| I2C_SCL / I2C_SDA | Configuration & control | Two-wire interface for register programming, tuning, and status readback; supports 400 kHz fast-mode |
| AM_IN / FM_IN | RF signal inputs | Differential antenna inputs with integrated LNA biasing; support separate AM/FM antenna paths or diversity switching |
Key Features
| Feature | Design Value |
|---|---|
| Multipath noise mitigation processing | Real-time digital correction of reflected signal distortion - improves audio clarity in urban driving environments |
| Integrated RDS demodulation | Full RDS group parsing including PI, PTY, PS, RT, and TA - enables dynamic station naming and traffic alerts |
| Low-IF DSP architecture | On-chip quadrature ADC + digital baseband processor - eliminates image-reject filters and reduces external BOM by ≥40% |
| Automotive qualification | AEC-Q100 Grade 2 - validated for 15-year automotive service life under thermal cycling, vibration, and humidity stress |
| Small footprint package | VFQFPN64 (9 × 9 mm) - fits compact head unit layouts while enabling efficient thermal dissipation via exposed pad |
Applications
| Automotive Infotainment Head Unit | HD-Radio™ Hybrid Receiver |
|---|---|
Use Scenario: Integrated radio module in OEM dashboard-mounted infotainment system with touchscreen UI and voice control. IC Role / Device Role / Timing Role: Primary AM/FM/HD-Radio™ RF tuner and digital baseband processor; synchronized to 36.864 MHz system clock. Use Value: Single-chip solution reduces PCB area by 35% vs discrete tuner + DSP approach and meets AEC-Q100 reliability targets. | Use Scenario: Aftermarket HD-Radio™ retrofit kit requiring backward compatibility with legacy FM/AM antennas. IC Role / Device Role / Timing Role: RF front-end and IF digitizer; interfaces with external STA680 decoder via parallel HD-Radio™ channel data bus. Use Value: Enables HD-Radio™ certification without redesigning RF section - leverages same antenna and LNA path as analog mode. |
| DRM Digital Radio Receiver | Commercial Fleet Communication System |
Use Scenario: Maritime or aviation-grade shortwave receiver supporting DRM standard for long-range digital voice/data broadcast. IC Role / Device Role / Timing Role: Wideband AM tuner with digital IF processing; paired with STA660DRM for OFDM demodulation and error correction. Use Value: Supports 4.5–30 MHz SW band coverage and DRM frame synchronization - critical for reliable HF link establishment. | Use Scenario: Dispatch console in logistics fleet management system receiving real-time traffic, weather, and route updates via RDS-enhanced FM subcarrier. IC Role / Device Role / Timing Role: RDS-enabled FM tuner with group-level synchronization - extracts TMC (Traffic Message Channel) and PTY (Program Type) data. Use Value: Delivers actionable navigation alerts with <500 ms latency - improves fleet response time and fuel efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AM/FM tuner applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si4790x series (Skyworks) | Software-defined radio architecture; integrated DSP, no external crystal required; supports DAB/DAB+ natively | Targeted at global multi-standard platforms (FM/DAB/HD-Radio™/DRM); higher BOM cost but broader feature set | Select when DAB+ or software-upgradable radio functionality is required beyond AM/FM/HD-Radio™ |
| MAX2175 (Maxim Integrated) | Zero-IF architecture; 24-bit sigma-delta ADC; SPI-only interface; no integrated RDS | Focused on high-dynamic-range FM-only receivers; requires external RDS decoder and clock source | Select for cost-sensitive FM-only designs where RDS is handled by host MCU and space is less constrained |
Compared with Si4790x and MAX2175, the TDA7708CBTR provides best-in-class integration for AM/FM/HD-Radio™ with minimal external components, native RDS, and AEC-Q100 validation - making it optimal for volume automotive programs prioritizing reliability and BOM reduction.
Availability
TDA7708CBTR is available at Aetrix Electronics and suitable for automotive infotainment head units, HD-Radio™ hybrid receivers, and commercial fleet communication systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.
Supply support for TDA7708CBTR 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, designing and manufacturing microcontrollers, power management ICs, sensors, and analog/mixed-signal products for automotive, industrial, and consumer markets.
The TDA7708CBTR belongs to ST's automotive radio tuner product line, engineered specifically to replace multi-chip AM/FM solutions with a single, AEC-Q100-qualified, low-IF DSP tuner optimized for cost, size, and thermal performance in vehicle head units.
FAQ
Does the TDA7708CBTR require an external crystal oscillator?
Yes - it requires a 36.864 MHz fundamental-mode crystal connected between XTAL_IN and XTAL_OUT pins. Internal load capacitors eliminate need for external caps, simplifying layout and reducing BOM count by two components.
Can the TDA7708CBTR decode HD-Radio™ signals without additional ICs?
No - HD-Radio™ decoding requires the external STA680 co-processor. The TDA7708CBTR performs RF tuning, IF digitization, and channel filtering only; STA680 handles OFDM demodulation, FEC, and audio decoding.
What is the purpose of the firmware download requirement at boot?
The TDA7708CBTR uses minimal boot firmware loaded via I²C/SPI to initialize internal DSP registers and calibration tables. This reduces flash memory demand on host microcontrollers and enables field-upgradable tuning parameters.
Is the VFQFPN64 package thermally enhanced?
Yes - the package features an exposed thermal pad that must be soldered to a large PCB copper pour connected to ground. With proper layout, thermal resistance junction-to-ambient is 27 °C/W, enabling 1 W dissipation within automotive ambient limits.
TDA7708CBTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Frequency:
- 108MHz
- Sensitivity:
- -
- Data Rate (Max):
- -
- Modulation or Protocol:
- AM, FM, RDS, SW-LW
- Applications:
- -
- Current - Receiving:
- 350mA
- Data Interface:
- -
- Memory Size:
- -
- Antenna Connector:
- -
- Features:
- -
- Voltage - Supply:
- 3.15V ~ 3.45V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-VFQFPN (9x9)
TDA7708CBTR FAQ
1.How can I place an order for TDA7708CBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7708CBTR 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 TDA7708CBTR reliable?
The price and inventory of TDA7708CBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7708CBTR is usually 5 days.
3.What payment methods are accepted for TDA7708CBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7708CBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7708CBTR?
TDA7708CBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7708CBTR 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 TDA7708CBTR?
For technical support, including TDA7708CBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7708CBTR requirements.
6.How does Aetrix verify that TDA7708CBTR is sourced from the original manufacturer or authorized distributors?
All TDA7708CBTR 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 TDA7708CBTR meets industry standards.
7.What is the process for return or replacement of TDA7708CBTR?
All TDA7708CBTR units undergo pre-shipment inspection (PSI). If there is an issue with TDA7708CBTR, 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 TDA7708CBTR part is unused and in its original packaging.
Return procedure for TDA7708CBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TDA7708CBTR Tags
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MICRF220AYQS-TR
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MAX2112ETI+
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MAX2112ETI+T
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M20048-1
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