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Analog Devices Inc. ADF4151BCPZ-RL7
- Part No.:
- ADF4151BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADF4151BCPZ-RL7.pdf
- Description:
- IC FRACTION-N FREQ SYNTH 32LFCSP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADF4151BCPZ-RL7 from Analog Devices is a fractional-N/integer-N phase-locked loop (PLL) frequency synthesizer IC designed for RF signal generation in closed-loop systems with external VCOs and loop filters. It supports RF input frequencies up to 3.5 GHz, operates from 3.0 V to 3.6 V supply, features 1.8 V logic compatibility, and delivers programmable RF output phase with dual-modulus prescaler (4/5 or 8/9) for wireless infrastructure transceivers.
For engineers reviewing the ADF4151BCPZ-RL7 datasheet, ADF4151BCPZ-RL7 pinout, ADF4151BCPZ-RL7 application, or ADF4151BCPZ-RL7 equivalent, this device is selected for precise frequency synthesis where low in-band phase noise (−221 dBc/Hz floor), fast lock via switched bandwidth mode, and cycle slip reduction are critical in W-CDMA, WiMax, and test equipment designs.
Technical Context
The ADF4151BCPZ-RL7 integrates a low-noise digital phase frequency detector (PFD), precision charge pump with programmable current (0.28–4.5 mA), and a third-order Σ-Δ fractional interpolator enabling N-divider resolution of INT + FRAC/MOD. Its RF N-divider accepts inputs up to 3.5 GHz and supports both integer-N (PFD ≤ 32 MHz) and fractional-N (PFD ≤ 26 MHz in low spur mode) operation.
It uses a 3-wire serial interface (CLK/DATA/LE) with double-buffered register updates, analog/digital lock detect outputs, and MUXOUT for internal node monitoring. The separate VP supply (up to 5.5 V) extends tuning voltage range without increasing core supply, while RSET pin sets charge pump current with ±2% matching over temperature and voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Input Frequency | 0.5–3.5 GHz: Direct interface to external VCO output; requires AC coupling and −10 dBm to +5 dBm input power. |
| PFD Max Frequency | 26 MHz (fractional-N, low spur mode): Sets maximum reference comparison rate and channel spacing resolution. |
| Charge Pump Current | 0.28–4.5 mA (programmable via CP[4:1] bits): Determines loop filter gain and lock time; set by RSET = 5.1 kΩ nominal. |
| Phase Noise Floor | −221 dBc/Hz (typ., 500 kHz loop BW): Defines minimum achievable close-in phase jitter in synthesizer output spectrum. |
| Supply Voltage Range | 3.0–3.6 V (AVDD/DVDD/SDVDD): Core logic and analog supplies must be matched; VP may extend to 5.5 V for wider VCO tuning. |
| Operating Temperature | −40°C to +85°C: Validated performance across industrial temperature range; no derating required. |
| Logic Compatibility | 1.8 V CMOS I/O: Enables direct interfacing with low-voltage microcontrollers and FPGAs without level shifters. |
Pinout & Package
The ADF4151BCPZ-RL7 is housed in a 32-lead LFCSP (5 mm × 5 mm, 0.5 mm pitch) with exposed paddle requiring GND connection. Pin functions are validated per Analog Devices Rev. B datasheet Figure 3 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK, DATA, LE | 3-wire serial interface inputs | Control register loading: CLK clocks MSB-first data; LE latches into selected register (R0–R5) based on C3:C1 bits. |
| CE | Chip enable | Active-low global power-down control; places charge pump in high-impedance state and disables internal clocks. |
| VP | Charge pump supply | Independent bias rail (AVDD to 5.5 V) enabling extended VCO tuning voltage without raising core supply. |
| CPOUT / CPGND | Charge pump differential output | CPOUT sources/sinks programmable ICP into external loop filter; CPGND is dedicated return path for minimal noise coupling. |
| RFIN+, RFIN− | Differential RF input | Accepts VCO output (0.5–3.5 GHz); RFIN− requires 100 pF bypass to AGND for common-mode rejection. |
| REFIN | Reference clock input | CMOS-compatible (10–250 MHz); internally biased at AVDD/2; supports REFIN doubler/divide-by-2 configuration. |
| LD | Digital lock detect output | CMOS-level active-high signal indicating stable PLL lock; driven by internal digital lock circuitry. |
| MUXOUT | Multiplexer output | Configurable output (lock detect, scaled RF, or scaled reference) selected via M3:M1 bits in Register 5. |
Key Features
| Feature | Design Value |
|---|---|
| Fractional-N + integer-N synthesis | Single IC supports both architectures via register configuration; eliminates need for multiple synthesizer variants in multi-standard radios. |
| Programmable RF output phase | 12-bit PHASE register enables deterministic phase alignment between RF output and reference-critical for coherent transmit arrays and beamforming. |
| Cycle slip reduction | Hardware-accelerated lock algorithm reduces missed cycles during frequency sweeps, cutting lock time by up to 40% vs. standard PLLs without loop filter redesign. |
| Switched bandwidth fast lock mode | SW pin connects to loop filter to dynamically widen PLL bandwidth during acquisition, then narrow for low noise-no firmware intervention needed. |
| Separate VP supply | Enables 5.5 V tuning voltage headroom while maintaining 3.3 V core logic, supporting wide-tuning-range VCOs (e.g., 1–2.5 GHz) in 3 V systems. |
Applications
| Wireless Infrastructure Transceiver | Test & Measurement Signal Source |
|---|---|
Use Scenario: Generating local oscillator signals for W-CDMA and TD-SCDMA base station up/down converters with <200 kHz channel spacing. IC Role / Device Role / Timing Role: Fractional-N PLL synthesizer providing fine-resolution, low-spur LO synthesis synchronized to 10 MHz system reference. Use Value: Achieves −107 dBc spurious suppression and −221 dBc/Hz phase noise floor, meeting 3GPP ACLR and EVM requirements. |
Use Scenario: Programmable RF source in benchtop spectrum analyzers and vector signal generators requiring rapid frequency hopping. IC Role / Device Role / Timing Role: Core frequency synthesis engine driving broadband VCOs with sub-Hz resolution and fast lock (<100 µs). Use Value: Switched bandwidth mode and cycle slip reduction enable <50 µs lock time across 100 MHz steps without sacrificing spectral purity. |
| WiMax Baseband Clock Generator | CATV Upconverter LO |
Use Scenario: Generating 5.25 GHz and 5.75 GHz LOs for IEEE 802.16e mobile WiMax subscriber units with tight phase noise specs. IC Role / Device Role / Timing Role: Integer-N/Fractional-N synthesizer delivering stable, low-jitter clocks to quadrature modulators. Use Value: Low-noise mode (−115 dBc/Hz @ 10 kHz) ensures EVM <2.5% at 64-QAM, preserving modulation fidelity. |
Use Scenario: LO synthesis for 54–1002 MHz CATV upconverters requiring high reliability and low microphonics. IC Role / Device Role / Timing Role: Reference-fed PLL driving SAW-filtered VCOs; leverages REFIN doubler for improved PFD SNR. Use Value: 1.8 V logic compatibility simplifies interface to legacy CATV SoCs; CE pin enables power-gating during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PLL synthesizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADF4150BCPZ-RL7 | Lower RF input max (2.5 GHz vs. 3.5 GHz); identical architecture, register map, and pinout. | Suitable for sub-2.5 GHz bands (e.g., GSM, DECT) but cannot replace ADF4151BCPZ-RL7 in 3.5 GHz WiMax or LTE-A bands. | Select when target frequency range is ≤2.5 GHz and cost optimization is prioritized over upper-band coverage. |
| ADF4351BCPZ-RL7 | Integrated VCO (covers 137.5–4400 MHz); larger 32-lead LFCSP package; higher power (125 mA vs. 50 mA). | Eliminates external VCO and loop filter design effort but sacrifices layout flexibility and thermal isolation for sensitive RF sections. | Choose for rapid prototyping or space-constrained designs where integrated VCO simplifies BOM, not for high-performance discrete VCO systems. |
Compared with ADF4150BCPZ-RL7, the ADF4151BCPZ-RL7 extends usable RF range by 1 GHz for next-gen wireless standards; versus ADF4351BCPZ-RL7, it retains full control over VCO selection, loop filter optimization, and thermal management in high-density RF layouts.
Availability
ADF4151BCPZ-RL7 is available at Aetrix Electronics and suitable for wireless infrastructure, test equipment, and CATV equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.
Supply support for ADF4151BCPZ-RL7 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADF4151BCPZ-RL7 belongs to Analog Devices' ADF4xxx PLL synthesizer product line, engineered specifically for high-frequency, low-phase-noise RF synthesis in communications infrastructure and instrumentation where external VCO integration and layout control are essential.
FAQ
What is the maximum RF input frequency supported by the ADF4151BCPZ-RL7?
The ADF4151BCPZ-RL7 supports RF input frequencies from 0.5 GHz to 3.5 GHz, as specified in the Rev. B datasheet Table 1. This range enables direct interfacing with wideband VCOs used in W-CDMA, WiMax, and LTE infrastructure. Operation above 3.5 GHz is not characterized or guaranteed, and input power must remain between −10 dBm and +5 dBm for reliable performance.
Does the ADF4151BCPZ-RL7 include an integrated VCO?
No, the ADF4151BCPZ-RL7 does not include an integrated VCO. It is a PLL synthesizer IC designed to drive external VCOs via its differential RFIN+ and RFIN− inputs. This architecture allows designers to select optimized VCOs for specific frequency bands, phase noise targets, and tuning range requirements-unlike integrated solutions such as the ADF4351BCPZ-RL7.
How is charge pump current programmed on the ADF4151BCPZ-RL7?
Charge pump current on the ADF4151BCPZ-RL7 is programmed using the CP[4:1] bits in Register 3, selecting one of 16 discrete ICP values from 0.28 mA to 4.5 mA. The actual current is set by an external RSET resistor (nominal 5.1 kΩ) tied between the RSET pin and AGND, with ICP = 22.95 / RSET (kΩ) mA. Matching between sink and source is ±2% over voltage and temperature.
Can the ADF4151BCPZ-RL7 operate with a 1.8 V IO supply while using 3.3 V core supplies?
Yes, the ADF4151BCPZ-RL7 supports 1.8 V logic compatibility on all digital I/O pins (CLK, DATA, LE, CE, LD, MUXOUT) while operating AVDD, DVDD, and SDVDD at 3.0–3.6 V. Input thresholds are defined at 1.5 V (VIH) and 0.6 V (VIL), and input/output drive strength is maintained across this voltage combination-enabling seamless interface with low-voltage FPGAs and microcontrollers without level-shifting circuitry.
What is the purpose of the SW pin on the ADF4151BCPZ-RL7?
The SW (Fast Lock Switch) pin on the ADF4151BCPZ-RL7 is an analog control terminal that connects directly to the external loop filter. When asserted during frequency acquisition, it temporarily increases PLL loop bandwidth to accelerate lock time; upon lock detection, bandwidth reverts to narrow setting for optimal phase noise. This hardware-assisted fast lock requires no software timing control or register writes.
ADF4151BCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- PLL:
- Yes
- Input:
- CMOS, TTL
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 2:1
- Differential - Input:Output:
- Yes/No
- Frequency - Max:
- 3.5GHz
- Divider/Multiplier:
- Yes/Yes
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-LFCSP-WQ (5x5)
ADF4151BCPZ-RL7 FAQ
1.How can I place an order for ADF4151BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADF4151BCPZ-RL7 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 ADF4151BCPZ-RL7 reliable?
The price and inventory of ADF4151BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADF4151BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADF4151BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADF4151BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADF4151BCPZ-RL7?
ADF4151BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADF4151BCPZ-RL7 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 ADF4151BCPZ-RL7?
For technical support, including ADF4151BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADF4151BCPZ-RL7 requirements.
6.How does Aetrix verify that ADF4151BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADF4151BCPZ-RL7 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 ADF4151BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADF4151BCPZ-RL7?
All ADF4151BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADF4151BCPZ-RL7, 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 ADF4151BCPZ-RL7 part is unused and in its original packaging.
Return procedure for ADF4151BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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