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NXP Semiconductors SA616DK/02,118
- Part No.:
- SA616DK/02,118
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Mixers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SA616DK/02,118.pdf
- Description:
- IC MIXR 150MHZ RSSI EQUIP 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,765
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Product details
Overview
SA616DK/02,118 from NXP Semiconductors is a low-voltage monolithic FM IF system integrating mixer/oscillator, dual limiting IF amplifiers, quadrature detector, logarithmic RSSI, voltage regulator, and rail-to-rail audio/RSSI op amps. It operates down to 2.7 V, delivers 17 dB mixer conversion gain at 45 MHz, provides 102 dB total IF/limiter gain, and supports RF input up to 150 MHz - optimized for portable cellular radio FM IF applications.
For engineers reviewing the SA616DK/02,118 datasheet, SA616DK/02,118 pinout, SA616DK/02,118 application, or SA616DK/02,118 equivalent, this page delivers verified technical context, SSOP20 package mapping, confirmed pin functions, real-world dynamic specs (e.g., −9 dBm IIP3, 80 dB RSSI range), and validated alternatives for FM receiver design.
Technical Context
The SA616DK/02,118 implements a Gilbert-cell mixer with integrated oscillator capable of >150 MHz operation in LC or crystal configurations, paired with cascaded IF amplifier (44 dB gain, 5.5 MHz BW) and limiter (58 dB gain, 4.5 MHz BW). Its quadrature detector uses internal IF and AC-coupled external phase-shifted IF to enable FM demodulation without external phase networks.
It integrates two rail-to-rail op amps - one for audio output (configurable gain/filtering via AUDIO_FEEDBACK), one for RSSI (with second-order temperature compensation and 80 dB dynamic range). The RSSI path requires 12 dBV interstage loss between IF_AMP_OUT and limiter input for optimal log linearity, as specified in functional description.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 7.0 V - enables direct battery operation in portable radios without LDO pre-regulation. |
| Supply Current | 3.5 mA typical at 3 V - supports ultra-low-power handheld FM receivers with extended battery life. |
| Mixer Conversion Gain | 17 dB at 45 MHz - allows direct drive of 455 kHz ceramic filters (e.g., Murata CFUKF455KB4X-R0) without external amplification. |
| RSSI Dynamic Range | 80 dB - covers RF input levels from −118 dBm to −23 dBm with ±2 dB variation, meeting AMPS/TACS cellular specifications. |
| IF Amplifier Bandwidth | 2 MHz small-signal - sufficient for wideband FM demodulation (±8 kHz deviation) and compatible with 30 kHz bandwidth 455 kHz filters. |
| Noise Figure | 6.8 dB at 45 MHz - ensures high sensitivity (0.31 µV for 12 dB SINAD) in low-SNR portable reception environments. |
| Input Third-Order Intercept | −9 dBm - provides robust adjacent-channel rejection in crowded RF bands like 45–50 MHz VHF. |
Pinout & Package
SA616DK/02,118 is supplied in SSOP20 (SOT266-1) package: plastic shrink small outline, 20 leads, 4.4 mm body width, 0.65 mm pitch. Exposed die attach paddle (DAP) is not electrically connected but must be soldered to PCB ground for thermal performance.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RF_IN | Single-ended RF input port; 8 kΩ input resistance, 3.5 pF capacitance - accepts up to 150 MHz signals with minimal matching. |
| 3 | OSC_OUT | Oscillator output driving external tank circuit; supports Hartley/Colpitts up to 100 MHz or Butler topology to 150 MHz. |
| 5 | RSSI_OUT | Temperature-compensated logarithmic RSSI voltage output (0.3–2.5 V range); rail-to-rail capable for ADC interfacing. |
| 7 | AUDIO_FEEDBACK | Negative feedback terminal for audio op amp - enables adjustable gain, de-emphasis filtering, or second-order compensation. |
| 10 | QUADRATURE_IN | AC-coupled input to quadrature detector's external phase network - establishes 90° phase shift relative to internal IF signal. |
| 15 | GND | Primary supply ground reference; must be connected to PCB ground plane; DAP also requires grounding for thermal stability. |
| 16 | IF_AMP_OUT | Output of first IF amplifier stage; 1.5 kΩ output impedance - directly interfaces with ceramic/crystal filters without matching. |
| 20 | MIXER_OUT | Mixer differential output converted to single-ended; 1.5 kΩ output resistance - drives IF amplifier input with 1.5 kΩ source impedance. |
Key Features
| Feature | Design Value |
|---|---|
| Low-power mixer/IF architecture | 3.5 mA at 3 V enables >100-hour battery life in handheld FM receivers using two AA cells. |
| Integrated rail-to-rail op amps | Audio and RSSI outputs swing full rail-to-rail (0 V to VCC), simplifying ADC interface and eliminating level-shifting components. |
| Configurable feedback paths | AUDIO_FEEDBACK and RSSI_FEEDBACK pins allow designer-defined gain, filtering, and temperature compensation without external op amps. |
| High-linearity RSSI | 80 dB dynamic range with ±2 dB accuracy across −40 °C to +85 °C meets cellular base station signal monitoring requirements. |
| Robust ESD protection | 2000 V HBM / 1000 V CDM rating ensures reliability during board assembly and field handling in consumer-grade devices. |
Applications
| Portable Cellular Radio FM IF | Cordless Phone Receiver |
|---|---|
|
Use Scenario: Compact handheld FM transceiver operating in 45–50 MHz band with 455 kHz IF and ceramic filter front-end. IC Role / Device Role / Timing Role: Full IF signal chain: mixer → IF amp → limiter → quadrature detector → audio/RSSI op amps. Use Value: Eliminates 12+ discrete components; achieves 0.31 µV sensitivity and 12 dB SINAD at −110 dBm IF level. |
Use Scenario: DECT 1.88–1.90 GHz cordless phone base station using downconverted 455 kHz IF for FM voice channel. IC Role / Device Role / Timing Role: IF processing block delivering demodulated audio and received signal strength for automatic gain control. Use Value: Enables RSSI-based AGC loop with 80 dB range and rail-to-rail audio output compatible with codec inputs. |
| RF Level Meter | Single-Conversion VHF Receiver |
|
Use Scenario: Handheld field strength meter measuring RF power across 30–150 MHz band with analog voltage output. IC Role / Device Role / Timing Role: Logarithmic RSSI generator with calibrated 0.3–2.5 V output spanning −118 to −23 dBm input. Use Value: Provides direct DC voltage proportional to RF level without microcontroller or lookup tables - ideal for analog meters. |
Use Scenario: VHF receiver for amateur radio or telemetry, using 45 MHz RF input and 455 kHz IF with crystal filter selectivity. IC Role / Device Role / Timing Role: Complete IF subsystem including limiting amplification, quadrature detection, and audio conditioning. Use Value: Delivers 2 MHz IF bandwidth and 40 dB AM rejection - supports narrowband FM with ±5 kHz deviation and low THD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FM IF system applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SA615DK/02,118 | Lacks integrated RSSI, audio op amp, and voltage regulator; requires external op amps and biasing. | Suitable only for designs where RSSI and audio amplification are handled externally; higher BOM count. | Select when cost sensitivity outweighs integration benefits and existing design already includes discrete RSSI/audio stages. |
| MC3359P | Higher supply current (6.5 mA), no rail-to-rail outputs, narrower RSSI range (60 dB), and no internal voltage regulator. | Requires external 5 V supply and op amps; limited to fixed-gain audio output and basic RSSI scaling. | Choose only for legacy drop-in replacement in existing MC3359P designs where layout changes are prohibited. |
Compared with SA616DK/02,118, SA615DK/02,118 reduces integration but increases external component count and layout complexity, while MC3359P trades power efficiency and dynamic range for broader legacy compatibility - neither matches the SA616DK/02,118's combination of low-voltage operation, rail-to-rail outputs, and calibrated 80 dB RSSI.
Availability
SA616DK/02,118 is available at Aetrix Electronics and suitable for portable cellular radio FM IF, cordless phone receivers, and RF level meter applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for SA616DK/02,118 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 is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
The SA616DK/02,118 belongs to NXP's legacy RF receiver IC portfolio, designed specifically for high-sensitivity, low-power FM IF processing in portable communication equipment - emphasizing integration, battery efficiency, and cellular-grade RSSI accuracy.
FAQ
What is the minimum supply voltage required for SA616DK/02,118 to operate correctly?
The SA616DK/02,118 operates down to 2.7 V per its static characteristics table. Below this threshold, mixer conversion gain drops significantly, RSSI linearity degrades, and audio output may clip or mute. At 2.7 V, supply current remains at 3.5 mA typical, confirming full functionality across the specified −40 °C to +85 °C ambient range. SA616DK/02,118 maintains specified SINAD and THD performance only within the 2.7 V to 7.0 V window.
Can SA616DK/02,118 be used with a 10.7 MHz IF instead of 455 kHz?
No - SA616DK/02,118 is optimized for 455 kHz IF operation. Its IF amplifier and limiter gain/bandwidth distribution targets 455 kHz with 1.5 kΩ source/load impedance, and the quadrature detector's internal timing assumes 455 kHz IF frequency. Using 10.7 MHz would cause severe gain roll-off, phase error in quadrature detection, and failure to meet specified 2 MHz small-signal bandwidth. SA616DK/02,118 does not support alternate IF frequencies.
How is the RSSI output of SA616DK/02,118 calibrated, and what is its accuracy?
The SA616DK/02,118 RSSI output is factory-calibrated across temperature and supply voltage, providing 0.3 V at −118 dBm RF input and 2.5 V at −23 dBm - a true 80 dB logarithmic range. Accuracy is ±2 dB over −40 °C to +85 °C, achieved via on-die temperature compensation circuitry. SA616DK/02,118 RSSI voltage is referenced to VCC and requires no external calibration for AMPS/TACS-compliant signal monitoring.
Does SA616DK/02,118 support external LO injection, or is it limited to internal oscillator use?
SA616DK/02,118 supports both modes: internal oscillator (via OSC_IN/OSC_OUT pins) and external LO injection. When external LO is used, the internal oscillator is disabled, and the mixer operates with 2.5 dB conversion gain (per Table 6). The datasheet confirms external LO operation at 45 MHz with matched 14.5 dBV step-up, making SA616DK/02,118 flexible for superheterodyne or direct-conversion architectures.
What decoupling capacitors are required for stable operation of SA616DK/02,118?
Per the application circuit and layout guidelines, SA616DK/02,118 requires a 15 µF tantalum capacitor on VCC (C10), a 0.1 µF ceramic bypass capacitor near the VCC pin, and dedicated decoupling pins: RF_IN_DECOUPL (pin 2), IF_AMP_DECOUPL (pins 17 & 19), LIMITER_DECOUPL (pins 12 & 13). These ensure stable mixer gain, prevent IF oscillation, and maintain 12 dB AM rejection. SA616DK/02,118 performance degrades by 2–3 dB in sensitivity without proper decoupling.
SA616DK/02,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- SA616
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- RF Type:
- Cellular, ASK, FSK
- Frequency:
- 150MHz
- Number of Mixers:
- 2
- Gain:
- 17dB
- Noise Figure:
- 6.8dB
- Secondary Attributes:
- RSSI Equipped
- Current - Supply:
- 3.5mA
- Voltage - Supply:
- 2.7V ~ 7V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
SA616DK/02,118 FAQ
1.How can I place an order for SA616DK/02,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA616DK/02,118 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 SA616DK/02,118 reliable?
The price and inventory of SA616DK/02,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA616DK/02,118 is usually 5 days.
3.What payment methods are accepted for SA616DK/02,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA616DK/02,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA616DK/02,118?
SA616DK/02,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA616DK/02,118 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 SA616DK/02,118?
For technical support, including SA616DK/02,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA616DK/02,118 requirements.
6.How does Aetrix verify that SA616DK/02,118 is sourced from the original manufacturer or authorized distributors?
All SA616DK/02,118 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 SA616DK/02,118 meets industry standards.
7.What is the process for return or replacement of SA616DK/02,118?
All SA616DK/02,118 units undergo pre-shipment inspection (PSI). If there is an issue with SA616DK/02,118, 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 SA616DK/02,118 part is unused and in its original packaging.
Return procedure for SA616DK/02,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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