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NXP Semiconductors SAA7706H/N210,518
- Part No.:
- SAA7706H/N210,518
- Manufacturer:
- NXP Semiconductors
- Category:
- DSP (Digital Signal Processors)
- Package:
- 80-BQFP
- Datasheet:
-
SAA7706H/N210,518.pdf
- Description:
- IC CAR RADIO DSP 80-QFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,385
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Product details
Overview
SAA7706H/N210,518 from NXP Semiconductors (formerly Philips) is a car radio–optimized Digital Signal Processor (DSP) integrating dual sigma-delta ADCs, quad-stream DACs, digital FM/AM stereo decoding, RDS demodulation, and interference absorption circuitry. It operates at 50 MHz (DSP1) and 62.9 MHz (DSP2), supports −40 to +85 °C, delivers 105 dB A-weighted SNR on FSDAC output, and enables independent front/rear audio processing for premium automotive infotainment systems.
For engineers reviewing the SAA7706H/N210,518 datasheet, SAA7706H/N210,518 pinout, SAA7706H/N210,518 application, or SAA7706H/N210,518 equivalent, key selection criteria include its 80-pin QFP package, I²C-bus control with fast-mode support, dual-media source routing, integrated 19 kHz MPX filter, Dolby-B tape noise reduction (at 44.1 kHz), and GSM-immune analog inputs for phone/NAV signals.
Technical Context
The SAA7706H/N210,518 implements two 5-bitstream 3rd-order sigma-delta ADCs for CD/TAPE/AUX/AM stereo inputs and one 1-bitstream 1st-order sigma-delta ADC dedicated to RDS, all with anti-aliasing broadband filters. Its Filter Stream DAC (FSDAC) uses 128× oversampling and noise shaping to achieve −90 dB THD+N at 0 dBFS and eliminates need for external post-filtering.
DSP1 handles FM/AM level detection, soft mute, sliding stereo, and signal quality monitoring (multipath, co-channel), while DSP2 manages baseband audio processing-including 4-channel 5-band parametric EQ, tone generation, and dynamics compression-with separate clock domains synchronized via an internal PLL driven by a 11.2896 MHz crystal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp | −40 to +85 °C - qualified for under-dash automotive environments without derating. |
| FSDAC SNR | 105 dB A-weighted - enables high-fidelity rear-seat audio output without external filtering. |
| DSP Clocks | DSP1 at 50 MHz, DSP2 at 62.9 MHz - supports real-time FM weak-signal processing and multi-band EQ simultaneously. |
| ADC Input Range | 0.66 VRMS max (CD/TAPE/AUX/AM); 0.368 VRMS max (FM_MPX) - matches standard tuner output levels without external gain staging. |
| I²C Support | Fast-mode (400 kHz) - allows rapid configuration of volume, EQ, and source routing during boot or runtime. |
| Crystal Frequency | 11.2896 MHz - generates all internal clocks (including 256fs SYSCLK) via PLL, eliminating need for multiple oscillators. |
| Analog Immunity | GSM-immune inputs (PHONE/NAV/AM) - suppresses 900/1800 MHz RF interference without external shielding. |
Pinout & Package
Package: QFP80 (SOT318-2), plastic quad flat package, 14 × 20 × 2.8 mm body, 80 leads, lead length 1.95 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDACP (1) | Positive reference voltage | Reference for ADC1/2/3 and level-ADC; must connect directly to filtered VDDA1 for optimal CMRR. |
| LEVEL (3) | FM/AM signal level input | Accepts 0–3.3 V DC level signal from tuner; digitized by dedicated 9-bit sigma-delta ADC for multipath detection. |
| POM (5) | Power-on mute control | External capacitor sets mute duration during power-up to prevent plop noise at FSDAC outputs. |
| FRV/FLV/RRV/RLV (13/16/6/9) | Quad FSDAC audio outputs | Front/rear left/right analog outputs; short-circuit protected; support voice-over mixing for PHONE/NAV signals. |
| RDS_CLOCK/RDS_DATA (59/60) | RDS interface | Buffered RDS bit clock and data outputs; enable direct connection to microcontroller without level-shifting. |
| OSC_IN/OSC_OUT (63/64) | Crystal oscillator interface | Drives internal PLL; requires 11.2896 MHz fundamental-mode crystal with load capacitance per datasheet Fig.25. |
Key Features
| Feature | Design Value |
|---|---|
| Dual media support | Independent front-seat (FRV/FLV) and rear-seat (RRV/RLV) audio paths with separate volume/EQ control-enables zone-based infotainment. |
| Digital FM interference suppression | Integrated Interference Absorption Circuit (IAC) reduces multipath distortion without requiring external DSP firmware. |
| On-chip RDS demodulator | Dedicated RDS ADC and buffer interface eliminate need for external RDS decoder IC or FPGA logic. |
| Soft audio mute | Hardware-controlled fade-to-mute during tuning or weak-signal conditions prevents audible click/pop artifacts. |
| Tape equalization & MSS detection | Real-time tape head compensation and Music Search System detection enable auto-track skipping on analog tape decks. |
Applications
| Automotive FM/AM Radio Receiver | Multi-Zone Car Audio System |
|---|---|
Use Scenario: High-end vehicle radio head unit receiving terrestrial FM/AM broadcasts with RDS traffic announcements and station identification. IC Role / Device Role / Timing Role: Central DSP performing FM stereo decoding, AM CQUAM decoding, RDS demodulation, signal quality monitoring, and baseband audio processing. Use Value: Eliminates need for discrete FM demodulator, RDS IC, and audio codec-reducing BOM count by ≥3 components and PCB area by >25%. |
Use Scenario: Premium sedan with separate front cabin and rear entertainment zones, each with independent source selection and volume control. IC Role / Device Role / Timing Role: Dual-path audio processor routing CD/phone/NAV sources to front and rear FSDAC outputs with independent DSP2 EQ and dynamics processing. Use Value: Enables simultaneous playback of navigation voice prompts in front and music in rear without cross-talk or latency mismatch. |
| CD/Tape-Based Infotainment Hub | Phone-Integrated Automotive Interface |
Use Scenario: Legacy vehicle platform supporting CD changer, analog tape deck, and auxiliary line-in with Dolby-B noise reduction and tape equalization. IC Role / Device Role / Timing Role: Analog front-end conditioner and digital audio processor handling CD de-emphasis, tape EQ, Dolby-B encoding/decoding at 44.1 kHz. Use Value: Maintains fidelity of aging analog sources while enabling digital enhancements like 9-band spectrum analysis and tone sequencing. |
Use Scenario: Hands-free calling system where phone audio is mixed into front FSDAC outputs with voice-over priority and echo cancellation readiness. IC Role / Device Role / Timing Role: Dual CMRR-input stage for PHONE/NAV signals, volume-controlled mixing into FLV/FRV, and I²C-configurable mute timing. Use Value: Achieves >60 dB common-mode rejection on cellular audio inputs without external instrumentation amps or layout-sensitive routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar car radio DSP applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAA7705H | Pin-compatible but lacks RDS demodulator and dual-media support; no NAV/PHONE CMRR inputs. | Suitable only for basic FM/AM radios without RDS or rear-seat audio. | Select when cost sensitivity outweighs RDS and zone-audio requirements. |
| SAA7708H | Includes enhanced AM CQUAM stereo decoder and improved weak-signal processing; same pinout and FSDAC specs. | Better suited for markets with strong AM stereo broadcast infrastructure (e.g., North America). | Choose for AM-dominant regions requiring certified CQUAM decoding and higher AM SNR. |
Compared with SAA7706H/N210,518, the SAA7705H omits RDS and dual-zone capability-reducing feature set but lowering BOM cost-while the SAA7708H extends AM functionality without changing layout or power design, making it a drop-in upgrade for AM-centric deployments.
Availability
SAA7706H/N210,518 is available at Aetrix Electronics and suitable for automotive infotainment, premium car radio receivers, and multi-zone audio systems requiring stable component supply across extended product lifecycles.
Supply support for SAA7706H/N210,518 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 (originally Philips Semiconductors) designs high-reliability automotive ICs with focus on signal integrity, RF immunity, and functional safety compliance.
The SAA7706H/N210,518 belongs to NXP's car radio DSP family, engineered specifically for integration into cost-sensitive yet feature-rich automotive head units requiring consolidated FM/AM/RDS/audio processing in a single chip.
FAQ
What is the primary function of the SAA7706H/N210,518 in automotive audio systems?
The SAA7706H/N210,518 serves as a full-featured car radio Digital Signal Processor, integrating analog front-end conditioning, digital FM/AM stereo decoding, RDS demodulation, baseband audio processing (EQ, dynamics, tone), and quad-channel DAC output. It replaces multiple discrete ICs in premium head units, enabling features like dual-zone audio, voice-over mixing, and GSM-immune phone input-all within a single 80-pin QFP package.
Does the SAA7706H/N210,518 support Dolby-B noise reduction, and under what conditions?
Yes, the SAA7706H/N210,518 supports Dolby-B tape noise reduction, but only at a 44.1 kHz sampling rate as specified in the datasheet. This functionality is implemented in hardware and applies exclusively to analog tape inputs (TAPE_L/TAPE_R), with automatic Music Search System (MSS) detection enabling track-skipping behavior during playback.
How does the SAA7706H/N210,518 handle FM multipath interference?
The SAA7706H/N210,518 mitigates FM multipath interference using its dedicated Interference Absorption Circuit (IAC), a hardware block that operates independently of the main DSP cores. It analyzes the FM_MPX signal in real time and applies adaptive filtering before stereo decoding-eliminating the need for software-based algorithms or external components to suppress ghosting and flutter.
What are the power supply requirements for the analog and digital sections of the SAA7706H/N210,518?
The SAA7706H/N210,518 requires separate analog and digital supplies: VDDA1/VSSA1 for ADCs and level-ADC (3.3 V ±10%), VDDA2/VSSA2 for FSDAC and SPDIF bitslicer (3.3 V ±10%), and multiple VDDD/VSSD rails (VDDD3V1–VDDD3V7) for core and peripheral logic (3.3 V ±10%). Total typical power dissipation is 750 mW at full operation, with analog current draw ≤60 mA and digital current ≤150 mA.
Is the SAA7706H/N210,518 pin-compatible with other devices in the SAA77xx family?
Yes, the SAA7706H/N210,518 is explicitly documented as pin-compatible with the SAA7705H and SAA7708H. This allows direct PCB reuse across variants-e.g., upgrading from SAA7705H (no RDS) to SAA7706H/N210,518 (with RDS) or to SAA7708H (enhanced AM)-without layout changes, provided the corresponding firmware and I²C configuration are updated to match the selected feature set.
SAA7706H/N210,518 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/N210,518 FAQ
1.How can I place an order for SAA7706H/N210,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for SAA7706H/N210,518 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/N210,518 reliable?
The price and inventory of SAA7706H/N210,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SAA7706H/N210,518 is usually 5 days.
3.What payment methods are accepted for SAA7706H/N210,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SAA7706H/N210,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SAA7706H/N210,518?
SAA7706H/N210,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SAA7706H/N210,518 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/N210,518?
For technical support, including SAA7706H/N210,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SAA7706H/N210,518 requirements.
6.How does Aetrix verify that SAA7706H/N210,518 is sourced from the original manufacturer or authorized distributors?
All SAA7706H/N210,518 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/N210,518 meets industry standards.
7.What is the process for return or replacement of SAA7706H/N210,518?
All SAA7706H/N210,518 units undergo pre-shipment inspection (PSI). If there is an issue with SAA7706H/N210,518, 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/N210,518 part is unused and in its original packaging.
Return procedure for SAA7706H/N210,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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