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NXP Semiconductors SAA7706H/N107,518
- Part No.:
- SAA7706H/N107,518
- Manufacturer:
- NXP Semiconductors
- Category:
- DSP (Digital Signal Processors)
- Package:
- 80-BQFP
- Datasheet:
-
SAA7706H/N107,518.pdf
- Description:
- IC CAR RADIO DSP 80-QFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,329
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Product details
Overview
SAA7706H/N107,518 from NXP Semiconductors (formerly Philips Semiconductors) is a car radio–specific Digital Signal Processor (DSP) integrating FM/AM stereo decoding, RDS demodulation, 5-channel sigma-delta ADCs, 4-channel Filter Stream DACs (FSDAC), and dual-media audio routing. It operates from 3.0–3.6 V supply, supports −40 to +85 °C ambient, and delivers 81 dB SNR on FM input and 90 dB SNR on CD/TAPE inputs. It enables independent front/rear seat audio processing in premium automotive head units.
For engineers reviewing the SAA7706H/N107,518 datasheet, SAA7706H/N107,518 pinout, SAA7706H/N107,518 application, or SAA7706H/N107,518 equivalent, key selection criteria include its integrated FM interference absorption circuit (IAC), RDS data buffering via dedicated RDS_CLOCK/RDS_DATA pins, dual I2S/SPDIF digital interface support, and pin compatibility with SAA7705/SAA7708 for platform reuse.
Technical Context
The SAA7706H/N107,518 implements two parallel DSP cores (DSP1 at 50 MHz, DSP2 at 62.9 MHz) with hardware-accelerated functions including digital FM stereo decoding, RDS demodulation, and Interference Absorption Circuit (IAC). Its analog front-end features three sigma-delta ADCs: two 5-bitstream 3rd-order stereo ADCs (ADC1/ADC2) and one 1-bitstream 1st-order mono ADC (ADC3) for RDS, plus a dedicated level-ADC for tuner signal strength monitoring.
Digital audio paths include dual SPDIF inputs (SPDIF1/SPDIF2), I2S-bus/LSB-justified serial interfaces (CD_DATA/CD_CLK/CD_WS), and co-processor I2S links (IIS_IN1/IIS_IN2/IIS_OUT1/IIS_OUT2). Clocking relies on an internal PLL driven by an 11.2896 MHz crystal oscillator (OSC_IN/OSC_OUT), generating all required system clocks without external frequency synthesis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0–3.6 V - Enables direct connection to automotive 3.3 V rail with ±10% tolerance margin. |
| Digital Supply Current | 110–150 mA at full clock - Specifies thermal budget for PCB layout and power plane design. |
| FM Input SNR | 75–81 dB - Measured at 1 kHz, 40 kHz BW, 0.368 V RMS reference; defines weak-signal fidelity in noisy RF environments. |
| CD/TAPE Input THD+N | −85 to −75 dB - Confirmed at 1 kHz, 20 kHz BW, 0.55 V RMS; ensures low-distortion analog source handling. |
| FSDAC Output SNR | 105 dB A-weighted - Code = 0, measured with System One; sets baseline for post-DAC analog stage noise floor. |
| Crystal Frequency | 11.2896 MHz - Fixed-frequency reference for PLL-based clock generation; no external clock source needed. |
| Operating Temperature | −40 to +85 °C - Qualified for under-dash automotive mounting without derating. |
Pinout & Package
Package: QFP80 (SOT318-2), plastic quad flat package, 80 leads, body size 14 × 20 × 2.8 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDACP / VDACN1 / VDACN2 | Analog reference voltage terminals | Provide precision bias for ADC1/ADC2/ADC3 and level-ADC; require local decoupling to VSSA1 for CMRR optimization. |
| FM_MPX / FM_RDS | Analog multiplexed FM input / RDS baseband input | Accept standard 0.368 V RMS FM MPX signal; SEL_FR pin enables fast tuner switching between them. |
| RDS_CLOCK / RDS_DATA | Dedicated RDS interface | Output bit clock and buffered RDS data stream; eliminates need for external RDS decoder IC. |
| FRV / FLV / RRV / RLV | Quad FSDAC audio outputs | Front/rear left/right analog outputs with short-circuit protection; POM pin controls power-on mute timing. |
| IIS_IN1 / IIS_IN2 / IIS_OUT1 / IIS_OUT2 | Co-processor I2S interface | Enable daisy-chained audio processing (e.g., subwoofer DSP or headphone amp) without host MCU intervention. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-media audio routing | Independent front-seat (FRV/FLV) and rear-seat (RRV/RLV) signal paths with separate volume, tone, and equalization control. |
| Integrated FM interference absorption (IAC) | Hardware-based suppression of GSM burst noise and AM/FM co-channel interference without software overhead. |
| No external post-filter required | On-chip semi-digital filter in FSDAC eliminates need for external RC or LC reconstruction filters, reducing BOM count. |
| High-GSM-immunity analog inputs | All analog input pins (PHONE, NAV, AM_L/NAV, AM_R/AM) feature enhanced RF rejection per GSM 900/1800 standards. |
| Boot-up ROM | Enables <100 ms start-up time from power-on; critical for automotive infotainment "instant-on" user experience. |
Applications
| Automotive Front/Rear Seat Audio System | FM/AM Radio Head Unit with RDS |
|---|---|
|
Use Scenario: Premium vehicle infotainment system delivering distinct audio content to driver/front passenger and rear passengers via separate amplifiers. IC Role / Device Role / Timing Role: SAA7706H/N107,518 acts as central audio signal processor-routing, mixing, equalizing, and decoding dual-source streams before DAC output. Use Value: Eliminates need for two discrete DSPs or complex MCU-based audio routing; reduces latency and inter-channel crosstalk vs. software-only solutions. |
Use Scenario: High-fidelity car radio supporting FM stereo, AM CQUAM, RDS traffic announcements, and Dolby-B tape noise reduction. IC Role / Device Role / Timing Role: SAA7706H/N107,518 performs real-time FM MPX decoding, RDS bit-stream demodulation, and AM level detection-all in hardware. Use Value: Achieves >75 dB FM SNR and RDS data buffer access via dedicated pins, enabling reliable text display and mute-on-pause without host CPU polling. |
| CD/Tape/AUX Source Aggregation | Co-Processor Audio Expansion |
|
Use Scenario: Multi-source car stereo accepting analog CD, cassette, AUX line-in, and digital SPDIF/I2S inputs simultaneously. IC Role / Device Role / Timing Role: SAA7706H/N107,518 serves as unified analog/digital front-end-converting, normalizing, and routing all sources to shared DSP resources. Use Value: Supports simultaneous CD de-emphasis, tape equalization, and AUX volume leveling using shared 5-band parametric EQ and dynamics compression blocks. |
Use Scenario: Modular audio architecture where SAA7706H/N107,518 offloads baseband processing while external I2S-linked DSP handles subwoofer crossover or headphone virtualization. IC Role / Device Role / Timing Role: SAA7706H/N107,518 provides synchronized IIS_IN1/IIS_IN2 inputs and IIS_OUT1/IIS_OUT2 outputs with frame-locked timing. Use Value: Enables deterministic latency (<50 µs) between main and co-processor domains-critical for phase-coherent multi-driver systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar car radio DSP applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAA7705 | Identical pinout and core architecture; lacks RDS demodulator block and dedicated RDS_CLOCK/RDS_DATA pins. | Not suitable for RDS-enabled systems; requires external RDS decoder IC and additional I2C bus management. | Select SAA7705 only when RDS functionality is omitted and cost reduction is prioritized over feature parity. |
| SAA7708 | Pin-compatible upgrade with enhanced AM CQUAM stereo decoder support across all ROM codes (vs. optional in SAA7706H/N107,518). | Better suited for global AM markets requiring guaranteed CQUAM decoding; identical FM/RDS performance otherwise. | Choose SAA7708 for new designs targeting North American/Asian AM broadcast compliance without ROM-code dependency checks. |
Compared with SAA7705 and SAA7708, the SAA7706H/N107,518 offers verified RDS demodulation in hardware and guaranteed FM interference absorption-making it the optimal choice for mid-tier European/Japanese OEM radio platforms requiring RDS but not mandatory CQUAM.
Availability
SAA7706H/N107,518 is available at Aetrix Electronics and suitable for automotive infotainment, premium car radio head units, and multi-source audio gateway modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SAA7706H/N107,518 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
NXP Semiconductors (formerly Philips Semiconductors) is a global leader in automotive semiconductor solutions, with deep expertise in audio signal processing, RF integration, and functional safety-compliant design.
The SAA7706H/N107,518 belongs to NXP's legacy car radio DSP family, engineered specifically for high-fidelity, low-latency audio processing in space-constrained automotive head units with stringent EMI immunity requirements.
FAQ
What is the primary function of the SAA7706H/N107,518 in automotive audio systems?
The SAA7706H/N107,518 serves as a dedicated car radio Digital Signal Processor, performing real-time FM/AM stereo decoding, RDS demodulation, multi-source analog/digital signal aggregation, and hardware-accelerated audio processing-including 5-band parametric EQ, Dolby-B tape noise reduction, and dual-media front/rear seat routing. Its architecture minimizes MCU load while ensuring deterministic latency for safety-critical audio paths.
Does the SAA7706H/N107,518 require external anti-aliasing or reconstruction filters?
No. The SAA7706H/N107,518 integrates a semi-digital filter within its Filter Stream DAC (FSDAC) architecture, eliminating the need for external RC or LC post-filtering on its four analog audio outputs (FRV, FLV, RRV, RLV). This reduces bill-of-materials cost and PCB area while maintaining >105 dB A-weighted SNR performance.
How does the SAA7706H/N107,518 handle RDS data acquisition and buffering?
The SAA7706H/N107,518 includes a dedicated RDS demodulator block with buffered output accessible via RDS_DATA and RDS_CLOCK pins. It recovers RDS bit clock and data synchronously, stores decoded RDS groups in an internal buffer, and supports pause detection and mute-on-signal-quality freeze-all without host MCU intervention, enabling reliable traffic announcement display.
Is the SAA7706H/N107,518 pin-compatible with other devices in the same family?
Yes. The SAA7706H/N107,518 is explicitly documented as pin-compatible with SAA7705 and SAA7708 in the Philips datasheet. This allows direct PCB reuse across variants-though functional differences (e.g., RDS presence in SAA7706H/N107,518 vs. absence in SAA7705) must be validated in firmware and system-level testing.
What are the key thermal and supply requirements for reliable operation of the SAA7706H/N107,518?
The SAA7706H/N107,518 operates across −40 to +85 °C ambient temperature and draws 110–150 mA from its 3.0–3.6 V digital supply (VDDD3V1–VDDD3V4) and 40–60 mA from its analog supply (VDDA1/VDDA2). Thermal design must accommodate up to 750 mW total power dissipation, with dedicated ground planes (VSSA1/VSSA2 for analog, VSSD3V1–VSSD3V7 for digital) to maintain PSRR >60 dB.
SAA7706H/N107,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 80-BQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Car Signal Processor
- Interface:
- I2C, I2S, LSB, SPDIF
- Clock Rate:
- -
- Non-Volatile Memory:
- -
- On-Chip RAM:
- -
- Voltage - I/O:
- 3.30V
- Voltage - Core:
- 3.30V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 80-PQFP (14x20)
SAA7706H/N107,518 FAQ
1.How can I place an order for SAA7706H/N107,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for SAA7706H/N107,518 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 SAA7706H/N107,518 reliable?
The price and inventory of SAA7706H/N107,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SAA7706H/N107,518 is usually 5 days.
3.What payment methods are accepted for SAA7706H/N107,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SAA7706H/N107,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SAA7706H/N107,518?
SAA7706H/N107,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SAA7706H/N107,518 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 SAA7706H/N107,518?
For technical support, including SAA7706H/N107,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SAA7706H/N107,518 requirements.
6.How does Aetrix verify that SAA7706H/N107,518 is sourced from the original manufacturer or authorized distributors?
All SAA7706H/N107,518 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 SAA7706H/N107,518 meets industry standards.
7.What is the process for return or replacement of SAA7706H/N107,518?
All SAA7706H/N107,518 units undergo pre-shipment inspection (PSI). If there is an issue with SAA7706H/N107,518, 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 SAA7706H/N107,518 part is unused and in its original packaging.
Return procedure for SAA7706H/N107,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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