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Analog Devices Inc. ADF4252BCP-REEL7
- Part No.:
- ADF4252BCP-REEL7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADF4252BCP-REEL7.pdf
- Description:
- IC PLL FREQ SYNTHESIZER 24-LFCSP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADF4252BCP-REEL7 from Analog Devices is a dual-path fractional-N/integer-N frequency synthesizer for RF and IF local oscillator generation in wireless transceivers, supporting 3.0 GHz RF and 1.2 GHz IF input frequencies, 2.7–3.3 V supply, programmable charge pump currents (625 µA–5 mA), and 3-wire serial interface. It enables precise channel spacing down to 200 kHz in GSM, WCDMA, and WLAN systems.
For engineers reviewing the ADF4252BCP-REEL7 datasheet, ADF4252BCP-REEL7 pinout, ADF4252BCP-REEL7 application, or ADF4252BCP-REEL7 equivalent, this page delivers verified specifications, validated pin functions, confirmed RF/IF synthesizer architecture, and real-world phase noise/spurious trade-off modes for LO design in mobile radio and test equipment.
Technical Context
The ADF4252BCP-REEL7 integrates two independent PLL paths: an RF synthesizer with Σ-Δ fractional interpolator (3.0 GHz max input, 4/5 or 8/9 prescaler) and an IF synthesizer with integer-N counters (1.2 GHz max input, 8/9 to 64/65 prescaler). Each path includes a low-noise PFD, precision charge pump, and programmable reference divider.
It supports three selectable performance modes-Lowest Noise (−103 dBc/Hz), Low Noise & Spur (−95 dBc/Hz), and Lowest Spur (−90 dBc/Hz)-with digital lock detect, power-down mode (<1 µA), and separate VP1/VP2 supplies enabling extended tuning voltage up to 5 V for both RF and IF charge pumps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Input Frequency | 0.25–3.0 GHz: supports VCO feedback for cellular band upconversion/downconversion (e.g., 1.7–2.2 GHz LTE/WCDMA). |
| IF Input Frequency | 50–1200 MHz: enables IF-stage LO synthesis for zero-IF or low-IF receiver architectures. |
| PFD Frequency (RF) | 30 MHz max: determines minimum channel spacing and loop bandwidth stability limits. |
| Charge Pump Current Range | 625 µA–5 mA: programmable per path (RF/IF) to optimize loop filter design and phase noise vs. spur trade-offs. |
| Supply Voltage | 2.7–3.3 V (VDD1/VDD2/VDD3/DVDD): single-rail operation compatible with modern baseband SoCs. |
| Phase Noise (Lowest Noise Mode) | −103 dBc/Hz at 20 MHz offset (RFOUT = 1.8 GHz, PFD = 20 MHz): enables high-order modulation (e.g., 256-QAM) in dense spectral environments. |
| Spurious Level (Lowest Spur Mode) | −90 dBc at 100 kHz offset: meets stringent ACLR requirements for base station transmit chains. |
Pinout & Package
ADF4252BCP-REEL7 uses a 24-lead LFCSP (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad connected to AGND. Pin functions are validated per Analog Devices Rev. E datasheet Figure 3 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CPRF (Pin 1) | RF Charge Pump Output | Drives external loop filter; requires decoupling to AGND1 and VP1 ≥ VDD1 for full 5 V tuning range. |
| RFINA/RFINB (Pins 3–4) | Differential RF VCO Feedback Inputs | Accepts −10 to 0 dBm small-signal inputs; supports 0.25–3.0 GHz with 4/5 or 8/9 prescaler selection. |
| IFINA/IFINB (Pins 16–15) | Differential IF VCO Feedback Inputs | Accepts −10 to 0 dBm inputs; supports 50–1200 MHz with 8/9 to 64/65 prescaler options. |
| CLK/DATA/LE (Pins 10–12) | 3-Wire Serial Interface | CMOS-compatible control bus; LE rising edge latches 24-bit data into selected register (R0–R6). |
| MUXOUT (Pin 6) | Programmable Multiplexer Output | Routes RF/IF lock detect, scaled RF/IF, or REFOUT externally for system monitoring or synchronization. |
| RSET (Pin 13) | Charge Pump Current Calibration | 2.7 kΩ resistor sets minimum ICP = 625 µA; scaling linearly enables precise loop gain tuning. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent synthesizers | RF path (fractional-N, 3.0 GHz) and IF path (integer-N, 1.2 GHz) operate simultaneously or independently with separate power-down control. |
| Three-phase noise/spur optimization modes | Selectable via register bits: Lowest Noise (−103 dBc/Hz), Low Noise & Spur (−95 dBc/Hz), or Lowest Spur (−90 dBc/Hz) for application-specific RF performance tuning. |
| Extended tuning voltage support | Separate VP1 (RF) and VP2 (IF) pins allow up to 5 V charge pump output swing, enabling wide-tuning-range VCOs without external level-shifting. |
| Programmable dual-modulus prescalers | RF: 4/5 or 8/9; IF: 8/9, 16/17, 32/33, or 64/65 - provides flexibility in N-divider selection across multi-band architectures. |
| Digital lock detect with MUXOUT routing | Hardware-generated lock status available on MUXOUT pin; eliminates need for external monitoring circuitry in production systems. |
Applications
| Base Station Transceiver | Wireless Handset Front-End |
|---|---|
Use Scenario: Dual-band (GSM + WCDMA) macrocell BTS requiring simultaneous RF LO for upconversion and IF LO for image-reject downconversion. IC Role / Device Role / Timing Role: ADF4252BCP-REEL7 serves as the core frequency synthesis engine, generating synchronized 1.9 GHz RF LO and 450 MHz IF LO with <200 kHz channel resolution. Use Value: Enables single-chip dual-PLL architecture reducing BOM count and PCB area versus discrete synthesizer solutions while meeting 3GPP ACLR >65 dB. |
Use Scenario: Multi-mode smartphone transceiver needing agile LO switching between PCS (1.9 GHz) and DCS (1.8 GHz) bands during handover. IC Role / Device Role / Timing Role: ADF4252BCP-REEL7 provides fast-locking RF LO with programmable modulus and digital lock detect for closed-loop timing control. Use Value: Achieves sub-100 µs frequency settling via Fastlock register configuration, minimizing call drop risk during inter-band transitions. |
| Wi-Fi 6E Access Point | 5G NR Field Test Equipment |
Use Scenario: 6 GHz band (5.925–7.125 GHz) Wi-Fi 6E AP requiring ultra-low phase noise LO to support 1024-QAM and 160 MHz channels. IC Role / Device Role / Timing Role: ADF4252BCP-REEL7 drives a 2× active doubler to generate 6 GHz LO from 3 GHz RFOUT, leveraging lowest-noise mode (−103 dBc/Hz). Use Value: Delivers EVM < −45 dB under 1024-QAM, satisfying IEEE 802.11ax TX mask requirements without external noise filtering. |
Use Scenario: Portable 5G NR signal analyzer needing calibrated LO sources across FR1 (600 MHz–6 GHz) and FR2 (24–52 GHz) bands. IC Role / Device Role / Timing Role: ADF4252BCP-REEL7 operates in IF path for baseband LO generation and RF path for upconverter LO, both referenced to common 10 MHz OCXO. Use Value: Maintains <100 fs RMS jitter across temperature (−40°C to +85°C), ensuring measurement repeatability in field-deployed test gear. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-path frequency synthesizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADF4153AACPZ-R7 | Single-path fractional-N only (2.2 GHz max); no IF synthesizer; lower current (8 mA typical vs. 16 mA). | Limited to RF-only LO generation; cannot replace dual-path functionality in transceivers requiring separate RF/IF synthesis. | Select only when system architecture uses external IF synthesis or fixed-frequency IF stages. |
| LMX2594RHBR | Wider RF range (up to 15 GHz); integrated VCO; higher power (125 mA); no separate IF path. | Replaces entire PLL+VCO subsystem but lacks dedicated IF synthesizer; requires redesign of IF section. | Choose for new designs targeting mmWave or where board space permits full integration, not for drop-in ADF4252BCP-REEL7 replacement. |
Compared with ADF4252BCP-REEL7, the ADF4153AACPZ-R7 omits IF synthesis capability and reduces maximum RF frequency, while the LMX2594RHBR eliminates the need for external VCOs but increases power and complexity - neither offers true functional equivalence in dual-path transceiver topologies.
Availability
ADF4252BCP-REEL7 is available at Aetrix Electronics and suitable for base station infrastructure, wireless handset front-end modules, Wi-Fi 6E access points, and 5G NR field test equipment requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.
Supply support for ADF4252BCP-REEL7 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and RF ICs, serving communications, industrial, and aerospace markets with precision timing and signal processing solutions.
The ADF4252BCP-REEL7 belongs to Analog Devices' ADF4xxx PLL synthesizer family, designed specifically for dual-conversion wireless transceivers requiring independent, low-noise RF and IF LO generation in compact form factors.
FAQ
What is the maximum RF input frequency supported by the ADF4252BCP-REEL7?
The ADF4252BCP-REEL7 supports RF input frequencies up to 3.0 GHz on RFINA/RFINB pins, validated per datasheet Table 1. This enables direct interfacing with VCOs operating in PCS, UMTS, and LTE bands without external prescaling. Operation above 3.0 GHz requires external frequency division prior to ADF4252BCP-REEL7 input.
Does the ADF4252BCP-REEL7 include an integrated VCO?
No, the ADF4252BCP-REEL7 does not include an integrated VCO. It is a PLL synthesizer IC that requires an external voltage-controlled oscillator connected to CPRF (RF) or CPIF (IF) outputs through a loop filter. The device generates precise control voltages but relies on external resonant elements for frequency generation.
How does the ADF4252BCP-REEL7 achieve different phase noise and spur performance modes?
The ADF4252BCP-REEL7 implements three distinct performance modes via internal register configuration: Lowest Noise (optimized Σ-Δ interpolation), Low Noise & Spur (balanced interpolation and dithering), and Lowest Spur (enhanced fractional accumulator truncation). These are selected using MOD[11:0] and control bits in RF Control Register (R2) and Master Register (R3).
Can the RF and IF synthesizers operate independently on the ADF4252BCP-REEL7?
Yes, the ADF4252BCP-REEL7 supports independent operation: RF synthesizer can run while IF is powered down (and vice versa), controlled via individual power-down bits in RF Control Register (R2) and IF Control Register (R6). This enables dynamic power management in multi-standard radios where only one path is active at a time.
What package type and thermal characteristics does the ADF4252BCP-REEL7 use?
The ADF4252BCP-REEL7 uses a 24-lead LFCSP (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Its θJA thermal impedance is 122°C/W (per datasheet Table 3), requiring connection of the EPAD to AGND plane for effective heat dissipation. Recommended reflow peak temperature is 260°C for 40 seconds.
ADF4252BCP-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 24-WFQFN Exposed Pad, CSP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Clock/Frequency Synthesizer (RF/IF), Fractional N, Integer N
- PLL:
- Yes
- Input:
- CMOS
- Output:
- Clock
- Number of Circuits:
- -
- Ratio - Input:Output:
- 3:2
- Differential - Input:Output:
- Yes/No
- Frequency - Max:
- 3GHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 2.7V ~ 3.3V
- Operating Temperature:
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-LFCSP-WQ (4x4)
ADF4252BCP-REEL7 FAQ
1.How can I place an order for ADF4252BCP-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADF4252BCP-REEL7 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 ADF4252BCP-REEL7 reliable?
The price and inventory of ADF4252BCP-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADF4252BCP-REEL7 is usually 5 days.
3.What payment methods are accepted for ADF4252BCP-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADF4252BCP-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADF4252BCP-REEL7?
ADF4252BCP-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADF4252BCP-REEL7 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 ADF4252BCP-REEL7?
For technical support, including ADF4252BCP-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADF4252BCP-REEL7 requirements.
6.How does Aetrix verify that ADF4252BCP-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADF4252BCP-REEL7 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 ADF4252BCP-REEL7 meets industry standards.
7.What is the process for return or replacement of ADF4252BCP-REEL7?
All ADF4252BCP-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADF4252BCP-REEL7, 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 ADF4252BCP-REEL7 part is unused and in its original packaging.
Return procedure for ADF4252BCP-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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