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NXP Semiconductors SA608DK/01,118
- Part No.:
- SA608DK/01,118
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Mixers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SA608DK/01,118.pdf
- Description:
- IC MIXER 150MHZ UP CONVRT 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,995
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Product details
Overview
SA608DK/01,118 from NXP Semiconductors (formerly Philips) is a monolithic low-voltage FM intermediate frequency (IF) system integrating mixer/oscillator, dual limiting IF amplifiers, quadrature detector, logarithmic RSSI, voltage regulator, and audio/RSSI op amps in a 20-lead SSOP package. It delivers 17dB mixer conversion gain at 45MHz, 102dB total IF/limiter gain, and 90dB RSSI dynamic range, operating down to 2.7V for portable cellular radio and cordless phone receivers.
For engineers reviewing the SA608DK/01,118 datasheet, SA608DK/01,118 pinout, SA608DK/01,118 application, or SA608DK/01,118 equivalent, this IC supports single-conversion VHF receiver design with buffered frequency-check output for AFC implementation, rail-to-rail op amp outputs, and ceramic-filter-compatible 1.5kΩ IF input impedance - critical for battery-powered communication systems requiring high sensitivity (0.31µV) and AM rejection (45dB).
Technical Context
The SA608DK/01,118 implements a Gilbert-cell mixer with integrated oscillator capable of >150MHz crystal operation (up to 150MHz with Butler configuration) and L/C oscillator extension beyond 200MHz. Its IF signal path features two cascaded limiting amplifiers delivering 44dB + 58dB gain and 2MHz small-signal bandwidth, optimized for 455kHz ceramic filters without external matching.
The quadrature detector uses internal IF-driven and externally phase-shifted signals to enable FM demodulation, while the temperature-compensated logarithmic RSSI provides 90dB dynamic range with ±1.5dB accuracy across –40°C to +85°C. The buffered frequency-check output (Pin 9) and limiter output (Pin 11) are 180° out-of-phase, enabling FSK demodulation or comparator-based AFC loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Mixer conversion gain | 17 dB typical at 45MHz - enables direct drive of 455kHz ceramic filters without external gain stages |
| IF/limiter total gain | 102 dB - sufficient for weak-signal reception with 12dB interstage loss compensation |
| RSSI dynamic range | 90 dB - supports wide-range RF level monitoring in cellular and instrumentation applications |
| Supply voltage range | 2.7 V to 7.0 V - ensures compatibility with single-cell Li-ion and multi-cell alkaline battery systems |
| Quadrature detector audio output | 60 mVRMS typical - rail-to-rail buffered output drives de-emphasis filters directly |
| Input third-order intercept | –9 dBm at 45MHz - defines strong-signal handling capability in crowded RF environments |
| Noise figure | 6.2 dB at 45MHz - contributes to 0.31 µV sensitivity into 50Ω for 12dB SINAD |
Pinout & Package
SA608DK/01,118 is housed in a 20-lead Shrink Small Outline Package (SSOP), 0.65 mm pitch, body size 7.2 × 5.3 mm, compliant with JEDEC MO-153. Pin functions are validated per Philips SA608 datasheet Rev. 1992.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | Decoupling terminals | Dedicated VCC bypass points for mixer, oscillator, IF amp, limiter, quad, and RSSI sections - minimizes crosstalk and improves noise performance |
| 7 | RF IN+ | Differential RF input positive terminal - 8 kΩ input resistance, 3.5 pF capacitance, optimized for 50Ω source matching |
| 8 | AUDIO | Buffered quadrature detector output - rail-to-rail op amp, 60 mVRMS typical, drives de-emphasis networks directly |
| 9 | FREQ CHECK / LIM OUT (–) | Inverted limiter output - 115 mVRMS into 5kΩ, 180° out-of-phase with Pin 11, used for AFC or FSK demodulation |
| 10 | QUADRATURE | Quadrature network connection - AC-coupled to tuned tank for 90° phase shift relative to internal IF signal |
| 11 | LIMITER OUT (+) | Non-inverted limiter output - 115 mVRMS into 5kΩ, matched amplitude and impedance to Pin 9 for differential processing |
| 12, 13, 14 | VCC, GND, LIMITER IN | Power, ground, and limiter input - Pin 14 connects to second IF amplifier output (Pin 16) via external filter |
| 15 | GND | Analog ground reference - separate from digital or RF grounds per layout guidelines |
| 16 | IF AMP OUT | First IF amplifier output - drives external ceramic/crystal filter or interstage network with 1.5 kΩ output impedance |
| 17 | IF AMP IN | Second IF amplifier input - 1.5 kΩ input impedance matches standard 455kHz filter outputs |
| 18 | MIXER OUT | Mixer output - 1.5 kΩ output impedance enables direct connection to 455kHz ceramic filters |
| 19 | OSCIN | Oscillator input - accepts crystal, LC tank, or external LO; supports Hartley/Colpitts up to 100MHz, Butler to 150MHz |
| 20 | RF IN– | Differential RF input negative terminal - complements Pin 7 for balanced mixer operation and improved noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Integrated mixer/oscillator with >150MHz crystal support | Enables compact, low-component-count IF front-end for VHF receivers without external LO synthesis |
| 102dB IF/limiter gain with 2MHz bandwidth | Permits use of low-cost 455kHz ceramic filters while maintaining SNR in narrowband FM demodulation |
| Temperature-compensated 90dB RSSI with buffered output | Provides stable received signal strength indication across –40°C to +85°C for automatic gain control or signal metering |
| Buffered frequency-check and limiter outputs (180° out-of-phase) | Supports zero-crossing detection or comparator-based AFC without external phase inversion circuitry |
| Rail-to-rail audio and RSSI op amps | Eliminates need for level-shifting or DC-blocking capacitors in battery-powered portable designs |
Applications
| Portable Cellular Radio Receiver | Cordless Telephone Base Station |
|---|---|
Use Scenario: Battery-powered handheld transceiver receiving 45MHz IF signals with 455kHz ceramic filtering and ±8kHz FM deviation. IC Role / Device Role / Timing Role: FM IF system performing mixing, limiting, quadrature detection, and RSSI generation in single-conversion architecture. Use Value: 0.31µV sensitivity and 45dB AM rejection ensure reliable voice reception in noisy urban RF environments. |
Use Scenario: Fixed-location cordless phone base station demodulating 45MHz IF from handset with low-power standby operation. IC Role / Device Role / Timing Role: Integrated IF processor providing audio output, RSSI for signal quality monitoring, and frequency-check output for AFC stability. Use Value: 2.7V minimum supply and rail-to-rail op amps extend battery life while maintaining audio fidelity and RSSI linearity. |
| RF Level Meter | Spectrum Analyzer Front-End |
Use Scenario: Handheld field instrument measuring RF signal strength across 1–150MHz using calibrated IF chain and logarithmic RSSI. IC Role / Device Role / Timing Role: High-dynamic-range RSSI generator with 90dB range and ±1.5dB accuracy referenced to IF input level. Use Value: Temperature-compensated logarithmic response eliminates calibration drift across operating temperature range. |
Use Scenario: Low-noise preselector stage in benchtop spectrum analyzer capturing 45MHz IF with minimal added distortion. IC Role / Device Role / Timing Role: Mixer/IF subsystem delivering 6.2dB noise figure and –9dBm IIP3 for accurate signal integrity analysis. Use Value: Dual limiter outputs enable real-time frequency verification during sweep acquisition without additional components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FM IF system applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SA607D/01,118 | Lower integration: no RSSI, no audio op amp, no frequency-check output; 16-pin SO package | Suitable only for basic mixer+IF amp functions; requires external RSSI/log amp and audio buffer | Select when cost and board space constrain demand for full IF integration and RSSI functionality is not required. |
| NE605N | Legacy 16-pin DIP; mixer+oscillator only; no IF amplifiers, detector, or RSSI; higher 5V-only supply requirement | Requires full external IF chain including limiters, detector, and op amps; limited to fixed-voltage systems | Choose only for legacy repair or where existing NE605-based layouts cannot be modified for SSOP footprint. |
Compared with SA608DK/01,118, the SA607D/01,118 reduces integration to save cost but sacrifices RSSI, audio buffering, and frequency-check capability - requiring ≥4 additional components for equivalent functionality. The NE605N lacks all post-mixer functions, demanding complete external IF signal chain design and excluding battery-operated 2.7V applications.
Availability
SA608DK/01,118 is available at Aetrix Electronics and suitable for portable cellular radio receivers, cordless telephone base stations, RF level meters, and spectrum analyzer front-ends requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant sourcing.
Supply support for SA608DK/01,118 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, headquartered in Eindhoven, Netherlands, develops high-performance analog and mixed-signal ICs for wireless communications, automotive, and industrial applications.
The SA608DK/01,118 belongs to NXP's legacy RF Communications product line, designed specifically for low-voltage, high-sensitivity FM IF processing in portable and battery-powered communication equipment.
FAQ
What is the minimum operating voltage for SA608DK/01,118?
The SA608DK/01,118 operates down to 2.7 V, enabling direct use with single-cell lithium-ion or three-cell alkaline batteries. At this voltage, it maintains 3.5 mA typical current drain and retains full functionality including mixer conversion gain, RSSI linearity, and audio output drive capability - verified across –40°C to +85°C ambient temperature.
Does SA608DK/01,118 support crystal oscillator configurations above 100MHz?
Yes, the SA608DK/01,118 supports crystal oscillator frequencies up to 150 MHz using a Butler oscillator configuration. For frequencies below 100 MHz, Hartley or Colpitts topologies are recommended. The datasheet confirms effective crystal oscillator operation to 150 MHz, with L/C tank oscillators extending beyond 200 MHz - all validated for SA608DK/01,118 in SSOP packaging.
How is the RSSI output of SA608DK/01,118 calibrated and temperature-compensated?
The SA608DK/01,118 incorporates an on-chip temperature-compensated logarithmic amplifier delivering 90 dB dynamic range with ±1.5 dB accuracy over –40°C to +85°C. RSSI voltage varies from 0.3 V at –118 dBm IF input to 2.5 V at –23 dBm, with monotonic response confirmed across temperature - eliminating need for external calibration in portable instrumentation and cellular radio applications.
Can SA608DK/01,118 be used for FSK data demodulation?
Yes, the SA608DK/01,118 supports FSK demodulation using its complementary limiter outputs: Pin 9 (FREQ CHECK / LIM OUT (–)) and Pin 11 (LIMITER OUT (+)) provide identical-amplitude, 180° out-of-phase signals. These can be fed into a comparator to generate zero-crossing pulses corresponding to frequency shifts - a method explicitly documented in the SA608 datasheet for FSK and ASK data receivers.
What is the IF input impedance of SA608DK/01,118 and how does it affect filter selection?
The SA608DK/01,118 exhibits 1.5 kΩ IF input impedance at Pin 18, matching standard 455 kHz ceramic filters (e.g., Murata SFG455A3) and many crystal filters without external impedance transformation. This eliminates need for matching networks, simplifies layout, and preserves bandwidth - a key design advantage confirmed in Philips' application circuits and test reports for SA608DK/01,118.
SA608DK/01,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- SA608
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- RF Type:
- Cellular, ASK, FSK, NAMPS, NTACS
- Frequency:
- 150MHz
- Number of Mixers:
- 2
- Gain:
- 19.5dB
- Noise Figure:
- 6.2dB
- Secondary Attributes:
- Up Converter
- Current - Supply:
- 4.2mA
- Voltage - Supply:
- 2.7V ~ 7V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
SA608DK/01,118 FAQ
1.How can I place an order for SA608DK/01,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA608DK/01,118 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 SA608DK/01,118 reliable?
The price and inventory of SA608DK/01,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA608DK/01,118 is usually 5 days.
3.What payment methods are accepted for SA608DK/01,118?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA608DK/01,118?
SA608DK/01,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA608DK/01,118 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 SA608DK/01,118?
For technical support, including SA608DK/01,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA608DK/01,118 requirements.
6.How does Aetrix verify that SA608DK/01,118 is sourced from the original manufacturer or authorized distributors?
All SA608DK/01,118 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 SA608DK/01,118 meets industry standards.
7.What is the process for return or replacement of SA608DK/01,118?
All SA608DK/01,118 units undergo pre-shipment inspection (PSI). If there is an issue with SA608DK/01,118, 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 SA608DK/01,118 part is unused and in its original packaging.
Return procedure for SA608DK/01,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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