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NXP Semiconductors SA58640DK,112
- Part No.:
- SA58640DK,112
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Mixers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SA58640DK,112.pdf
- Description:
- IC MIXER 100MHZ UP CONVRT 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,278
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Product details
Overview
SA58640DK,112 from NXP Semiconductors is a low-voltage monolithic FM intermediate frequency (IF) system IC integrating mixer/oscillator, dual limiting IF amplifiers, quadrature detector, logarithmic RSSI, voltage regulator, and audio/RSSI operational amplifiers in a 20-pin SSOP package. It delivers 17 dB mixer conversion gain at 45 MHz, 102 dB total IF/limiter gain, and 70 dB temperature-compensated RSSI dynamic range for analog cordless telephone receivers.
For engineers reviewing the SA58640DK,112 datasheet, SA58640DK,112 pinout, SA58640DK,112 application, or SA58640DK,112 equivalent, this page provides verified circuit role, exact pin functions, real-world RF/IF performance metrics, and validated alternative options for FM IF signal processing in battery-powered consumer telephony systems.
Technical Context
The SA58640DK,112 implements a second-IF architecture with a Gilbert-cell mixer and on-chip oscillator supporting up to 100 MHz RF input. Its IF amplifier and limiter stages provide 44 dB and 58 dB gain respectively, optimized for 455 kHz ceramic filters with 1.5 kΩ input/output impedance matching.
Signal path includes AC-coupled quadrature detection using internal IF and external 90° phase-shifted IF, followed by rail-to-rail op-amps for audio and RSSI outputs. The logarithmic RSSI features second-order temperature compensation and 12 dBV insertion loss requirement between IF stages for linearity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 6.0 V - supports single-cell Li-ion or dual-cell alkaline operation |
| Supply Current | 5.0 mA typical at 5 V - enables >100-hour battery life in portable cordless handsets |
| Mixer Conversion Gain | 17 dB at 45 MHz - ensures high sensitivity with minimal external gain stages |
| IF Amplifier/Limiter Gain | 102 dB total - achieves robust signal recovery from weak RF inputs |
| RSSI Dynamic Range | 70 dB with temperature compensation - enables accurate signal strength reporting across −40 °C to +85 °C |
| Small-Signal Bandwidth | 2 MHz - supports full 30 kHz FM channel bandwidth without distortion |
| Noise Figure | 7.0 dB at 45 MHz - maintains SINAD ≥12 dB at −110 dBm RF input |
Pinout & Package
SA58640DK,112 is housed in a plastic shrink small outline package (SSOP20), SOT266-1, with 20 leads and 4.4 mm body width. Pin pitch is 0.65 mm; maximum package height is 1.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF_IN_P (1) | Positive RF mixer input | Differential RF interface accepting up to 100 MHz; 8 kΩ input resistance |
| RF_IN_N_DEC (2) | Negative RF mixer input, decoupling | DC return path for balanced mixer input; requires local decoupling |
| OSCOUT (3) | Oscillator output (emitter) | Drives external LC tank or crystal; supports Hartley/Colpitts up to 100 MHz |
| OSCIN (4) | Oscillator input (base) | Provides feedback path for on-chip oscillator; sets LO frequency stability |
| RSSI_OUT (5) | RSSI amplifier output | Rail-to-rail op-amp output delivering 0.5–2.4 V for −110 to −50 dBm IF levels |
| VCC (6) | Positive supply | Accepts 4.5–6.0 V; requires 10 μF tantalum + 0.1 μF ceramic bypass per layout guidelines |
| AUDIO_FB (7) | Audio amplifier negative input, feedback | Configures unity-gain buffer or active filtering; supports de-emphasis network |
| AUDIO_OUT (8) | Audio amplifier output | Rail-to-rail output driving ≥10 kΩ AC load; RMS audio output ≥117 mV at 5 V |
| RSSI_FB (9) | RSSI amplifier negative input, feedback | Enables gain adjustment and second-order temperature compensation of RSSI |
| QUAD_IN (10) | Quadrature detector input | Receives externally phase-shifted IF signal for synchronous FM demodulation |
| LIM_OUT (11) | Limiter amplifier output | Drives quadrature detector; 130 mV RMS output into 1.5 kΩ load |
| LIM_DEC (12,13) | Limiter decoupling | Dual dedicated decoupling pins for limiter stage stability; require local 100 nF caps |
| LIM_IN (14) | Limiter amplifier input | 1.5 kΩ input impedance matches standard 455 kHz ceramic filter outputs |
| GND (15) | Ground | Primary reference for analog sections; must be low-impedance plane per demo board layout |
| IF_AMP_OUT (16) | IF amplifier output | Drives limiter input; 0.3 kΩ output impedance minimizes interstage loss |
| IF_AMP_DEC (17,19) | IF amplifier decoupling | Dual decoupling pins ensure stable 44 dB gain at 5.5 MHz bandwidth |
| IF_AMP_IN (18) | IF amplifier input | 1.5 kΩ input impedance eliminates need for matching networks with 455 kHz filters |
| MIXER_OUT (20) | Mixer output | 1.5 kΩ output resistance enables direct connection to 455 kHz ceramic filters |
Key Features
| Feature | Design Value |
|---|---|
| Integrated FM IF signal chain | Eliminates 12+ discrete components in cordless phone front-ends, reducing BOM cost and PCB area |
| Rail-to-rail audio/RSSI op-amps | Enables full-scale output swing from 0 V to VCC without external level-shifting circuitry |
| Crystal/LC/external LO flexibility | Supports 44.545 MHz crystal (demo board), LC tanks >100 MHz, or external LO injection |
| ESD protection | 2 kV HBM / 200 V machine model - meets IEC 61000-4-2 Level 2 for handheld device robustness |
| Low external component count | Operates with only 2 capacitors, 1 resistor, and 455 kHz ceramic filter - no tuning required |
Applications
| DECT Cordless Handset Receiver | FM Wireless Intercom Base Station |
|---|---|
Use Scenario: Analog 45 MHz RF signal reception in DECT-compatible cordless telephone handsets operating on 455 kHz IF. IC Role / Device Role / Timing Role: SA58640DK,112 serves as complete second-IF subsystem - performing mixing, IF amplification, limiting, quadrature demodulation, and RSSI generation. Use Value: Achieves −114 dBm sensitivity (12 dB SINAD) with no external gain stages, enabling compact, low-power handset designs. | Use Scenario: FM-based wireless intercom system with 455 kHz IF filtering and analog audio output. IC Role / Device Role / Timing Role: SA58640DK,112 acts as FM demodulator and signal-strength monitor, converting RF to baseband audio while providing RSSI for channel selection. Use Value: Delivers 60 dB S/N ratio and <−55 dB THD, ensuring clear voice transmission without post-processing. |
| 455 kHz Ceramic Filter-Based Radio | Battery-Powered FM Monitor Receiver |
Use Scenario: Low-cost FM receiver using Murata CFUCF455KB4X-R0 ceramic filter (30 kHz BW) in consumer electronics. IC Role / Device Role / Timing Role: SA58640DK,112 interfaces directly with 1.5 kΩ-impedance ceramic filters, eliminating matching networks and calibration. Use Value: Reduces bill-of-materials by 7 components versus discrete IF chain; supports drop-in replacement of legacy SA6x6DK designs. | Use Scenario: Portable FM signal strength monitor for field technicians verifying wireless link quality. IC Role / Device Role / Timing Role: SA58640DK,112 provides calibrated RSSI output (0.5–2.4 V over 60 dB range) with second-order temperature compensation. Use Value: Enables ±1 dB RSSI accuracy from −40 °C to +85 °C without microcontroller compensation algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FM IF signal processing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SA606DK,112 | Lower IF gain (80 dB), no integrated RSSI, 16-pin SO package | Lacks log RSSI and audio op-amp; requires external RSSI circuitry | Select when RSSI functionality is unnecessary and PCB space allows discrete RSSI design |
| MC3362P | Higher supply current (8 mA), wider temp range (−55 °C to +125 °C), DIP-18 package | Designed for industrial two-way radios; lacks rail-to-rail op-amps and ceramic filter optimization | Choose for extended temperature operation where SSOP20 footprint is not constrained |
Compared with SA606DK,112 and MC3362P, the SA58640DK,112 uniquely integrates RSSI, audio amplification, and 1.5 kΩ IF impedance matching - reducing external components by 40% and enabling true single-chip FM IF solutions for consumer cordless telephony.
Availability
SA58640DK,112 is available at Aetrix Electronics and suitable for cordless telephony, wireless intercoms, FM monitoring equipment, and 455 kHz IF filter-based radio receivers requiring stable component supply and long-term production continuity.
Supply support for SA58640DK,112 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer markets.
The SA58640DK,112 belongs to NXP's legacy analog RF front-end product line, engineered specifically for cost-sensitive, battery-operated FM IF signal processing in analog cordless telephone systems.
FAQ
What is the maximum RF input frequency supported by the SA58640DK,112?
The SA58640DK,112 supports RF input frequencies up to 100 MHz in its mixer/oscillator section, as confirmed in the dynamic characteristics table. This capability enables use in 45 MHz cordless telephone bands and higher-frequency FM applications when paired with appropriate external oscillator configurations such as LC tanks or crystal-based Hartley circuits.
Does the SA58640DK,112 require external IF filtering, and what impedance is recommended?
Yes, the SA58640DK,112 requires external 455 kHz IF filtering, and it is optimized for 1.5 kΩ-impedance ceramic filters like the Murata CFUCF455KB4X-R0. Its IF amplifier input and output impedances are both 1.5 kΩ, allowing direct connection without matching networks - a key design feature confirmed in the functional description and dynamic characteristics tables.
How is RSSI linearity maintained across temperature in the SA58640DK,112?
The SA58640DK,112 uses second-order temperature compensation in its logarithmic RSSI circuit, delivering a 70 dB dynamic range with stable accuracy from −40 °C to +85 °C. The datasheet specifies that proper 12 dBV insertion loss between IF stages is required to achieve optimum linearity - a condition met by standard 455 kHz ceramic filters or added L-pads if needed.
Can the SA58640DK,112 operate from a single 3.7 V lithium-ion cell?
No - the SA58640DK,112 has a minimum supply voltage of 4.5 V per the static characteristics table. While the limiting values list 7 V absolute maximum, operation below 4.5 V is not characterized or guaranteed. For 3.7 V battery systems, a boost converter or dual-cell alkaline supply (≈3 V × 2 = 6 V) is required to meet the SA58640DK,112's specified operating range.
What is the purpose of the dual LIM_DEC and IF_AMP_DEC pins on the SA58640DK,112?
The SA58640DK,112 includes two dedicated decoupling pins each for the limiter (pins 12 and 13) and IF amplifier (pins 17 and 19) to ensure stable high-gain operation. These pins require local 100 nF monolithic ceramic capacitors connected directly to ground, as specified in the application information and demo board layout guidance - critical for preventing oscillation and maintaining 2 MHz small-signal bandwidth.
SA58640DK,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- SA58640
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- RF Type:
- Cordless Phones
- Frequency:
- 100MHz
- Number of Mixers:
- 2
- Gain:
- 17dB
- Noise Figure:
- 7dB
- Secondary Attributes:
- Up Converter
- Current - Supply:
- 6mA
- Voltage - Supply:
- 4.5V ~ 6V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
SA58640DK,112 FAQ
1.How can I place an order for SA58640DK,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA58640DK,112 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 SA58640DK,112 reliable?
The price and inventory of SA58640DK,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA58640DK,112 is usually 5 days.
3.What payment methods are accepted for SA58640DK,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA58640DK,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA58640DK,112?
SA58640DK,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA58640DK,112 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 SA58640DK,112?
For technical support, including SA58640DK,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA58640DK,112 requirements.
6.How does Aetrix verify that SA58640DK,112 is sourced from the original manufacturer or authorized distributors?
All SA58640DK,112 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 SA58640DK,112 meets industry standards.
7.What is the process for return or replacement of SA58640DK,112?
All SA58640DK,112 units undergo pre-shipment inspection (PSI). If there is an issue with SA58640DK,112, 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 SA58640DK,112 part is unused and in its original packaging.
Return procedure for SA58640DK,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA58640DK,112 Tags
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Analog Devices Inc./Maxim Integrated
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ADEX-10+
Mini-Circuits
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ADE-2+
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ADE-1+
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LT5560EDD#PBF
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LT5560EDD#TRPBF
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LTC5562IUC#TRPBF
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MAX2681EUT+T
Analog Devices Inc./Maxim Integrated
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ADE-1ASK+
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ADE-1L+
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ADL5350ACPZ-R7
Analog Devices Inc.
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AD608ARZ-RL
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