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Analog Devices Inc. ADF4154BRU-REEL7
- Part No.:
- ADF4154BRU-REEL7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADF4154BRU-REEL7.pdf
- Description:
- IC FRACTION-N FREQ SYNTH 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,260
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Product details
Overview
ADF4154BRU-REEL7 from Analog Devices is a fractional-N frequency synthesizer IC used as a local oscillator in RF up/down-conversion stages of wireless transceivers. It supports RF input up to 4 GHz, operates from 2.7 V to 3.3 V, features programmable charge pump currents (312.5 µA to 5 mA), and implements fast-lock mode with built-in timer for rapid PLL settling in base station and handset applications.
For engineers reviewing the ADF4154BRU-REEL7 datasheet, ADF4154BRU-REEL7 pinout, ADF4154BRU-REEL7 application, or ADF4154BRU-REEL7 equivalent, this page delivers verified specifications, TSSOP-16 pin mapping, fractional-N synthesis trade-offs (noise vs. spurs), lock-detect functionality, and validated alternatives for RF PLL design.
Technical Context
The ADF4154BRU-REEL7 integrates a low-noise digital phase-frequency detector (PFD), precision charge pump, and third-order Σ-Δ fractional interpolator enabling N-divider values defined by N = INT + FRAC/MOD. Its dual-modulus prescaler (4/5 or 8/9) and 4-bit R-counter support flexible reference division (1–15) and integer division (31–511).
It provides MUXOUT for external access to lock detect, scaled RF, or scaled reference signals; separate VP supply (up to 5.5 V) extends VCO tuning range; and 3-wire serial interface enables register programming of INT, FRAC, MOD, R, and noise/spur optimization modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Input Frequency | 0.5 GHz to 4.0 GHz - supports direct VCO feedback in cellular/WiMAX/PMR bands without external prescaling. |
| PFD Frequency Max | 32 MHz - sets upper limit on reference-to-VCO resolution and loop bandwidth planning. |
| Charge Pump Current | Programmable 312.5 µA to 5 mA - adjusts loop filter gain and phase margin per VCO sensitivity and noise targets. |
| Fractional Modulus | 12-bit programmable (2–4095) - enables fine frequency step resolution down to sub-Hz increments. |
| Phase Noise Floor | −220 dBc/Hz typ - normalized synthesizer noise floor at 100 kHz offset, critical for adjacent-channel rejection. |
| Fast-Lock Timer | Built-in countdown timer - maintains wide-loop bandwidth automatically during acquisition, eliminating external timing control. |
| Digital Lock Detect | Analog/digital lock detect outputs - provides system-level PLL status monitoring with configurable precision (24 or 40 PFD cycles). |
Pinout & Package
TSSOP-16 package with exposed pad (EPAD) requiring connection to AGND per datasheet Figure 3 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RSET (Pin 1) | Charge pump current setting | Resistor to ground defines ICPmax via ICP = 25/RSET (kΩ); e.g., 5.1 kΩ → 4.9 mA typical. |
| CP (Pin 2) | Charge pump output | Sinks/sources ±ICP to external loop filter; requires low-impedance path to VCO tuning line. |
| CPGND (Pin 3) | Charge pump ground return | Separate analog ground path minimizes noise coupling into sensitive CP node. |
| AGND (Pin 4) | Analog ground reference | Primary ground for RF section and prescaler; EPAD must connect here. |
| RFINB (Pin 5) | Complementary RF input | Differential input pair with RFINA; decoupling capacitor required for AC coupling stability. |
| RFINA (Pin 6) | RF input to prescaler | Accepts ac-coupled VCO output; slew rate >400 V/µs required below 1 GHz. |
| AVDD (Pin 7) | Analog power supply | 2.7–3.3 V supply for RF section; must match DVDD/SDVDD voltage. |
| REFIN (Pin 8) | Reference clock input | CMOS-compatible 10–250 MHz input; internal 100 kΩ termination; optional REFIN doubler bit. |
| LE (Pin 13) | Load enable control | Active-high strobe latches 24-bit shift register contents into selected register (N/R/control/noise). |
| DATA (Pin 12) | Serial data input | MSB-first 24-bit stream; two LSBs (C2/C1) select destination register per Table 5. |
| CLK (Pin 11) | Serial clock input | CMOS clock; data sampled on rising edge; tsetup = 20 ns, thold = 10 ns. |
| MUXOUT (Pin 14) | Multiplexer output | Selectable output: RF lock detect, scaled RF, or scaled reference; open-drain analog/digital options. |
| DVDD (Pin 15, 16) | Digital power supply | 2.7–3.3 V for logic and Σ-Δ interpolator; must match AVDD/SDVDD. |
| VP (Pin 18) | Charge pump power rail | Independent supply (AVDD to 5.5 V) enabling extended VCO tuning voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Fast-lock mode with integrated timer | Eliminates external timing circuitry; user-programmable countdown ensures consistent wide-bandwidth acquisition window. |
| Programmable dual-modulus prescaler | Configurable 4/5 or 8/9 ratio enables optimal trade-off between RF bandwidth and PFD frequency for given VCO range. |
| Σ-Δ fractional-N interpolation | Third-order modulator suppresses fractional spurs while maintaining <1 Hz frequency resolution. |
| Digital lock detect with precision selection | Configurable lock detection over 24 or 40 PFD cycles - balances false-lock immunity vs. acquisition speed. |
| Separate VP supply rail | Decouples charge pump headroom from core logic supply, supporting VCOs requiring >3.3 V tuning voltage. |
| Pin compatibility with ADF411x/ADF4106/ADF4153 | Enables drop-in upgrade path in existing PLL designs without PCB layout changes. |
Applications
| Base Station Local Oscillator | Wireless Handset Transceiver |
|---|---|
Use Scenario: Generating stable LO signals for up/down-conversion in GSM, W-CDMA, and LTE macrocell base stations. IC Role / Device Role / Timing Role: Fractional-N synthesizer providing programmable RF output (0.5–4 GHz) with low phase noise and fast settling for multi-carrier operation. Use Value: −102 dBc/Hz phase noise at 1 kHz offset (1750 MHz) meets stringent ACLR requirements in 3GPP FDD systems. |
Use Scenario: LO generation in dual-mode PMR/GSM handsets requiring rapid channel switching and low power consumption. IC Role / Device Role / Timing Role: Programmable synthesizer with fast-lock mode and sleep current <1 µA enabling burst-mode operation. Use Value: Fast-lock timer reduces lock time to <110 µs (vs. >500 µs in normal mode), improving TDMA slot efficiency. |
| CATV Upconverter LO | Wireless LAN Test Equipment |
Use Scenario: Frequency translation in broadband CATV headend upconverters covering 50–1000 MHz IF to 54–1002 MHz RF band. IC Role / Device Role / Timing Role: High-resolution synthesizer with 12-bit MOD register enabling precise channel spacing (e.g., 6 MHz, 8 MHz). Use Value: Programmable modulus and FRAC registers allow exact channel alignment without external dividers or mixers. |
Use Scenario: Signal source in 802.11a/b/g/n test equipment requiring agile, low-spur LO generation across 2.4 GHz and 5 GHz bands. IC Role / Device Role / Timing Role: Fractional-N PLL with selectable noise/spur optimization modes for calibrated spectral purity. Use Value: Low spur mode reduces fractional spurs by >15 dB compared to lowest-noise mode, meeting IEEE 802.11 mask compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fractional-N synthesizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADF4153BRUZ-RL7 | Lacks fast-lock timer and has reduced RF bandwidth (2.8 GHz max); identical pinout and register map. | Suitable for cost-sensitive designs where lock time <110 µs is not required and VCO range ≤2.8 GHz. | Select ADF4153BRUZ-RL7 only if fast-lock and 4 GHz support are unnecessary - retains full software compatibility. |
| LMX2531LQ1580E/NOPB | Integrated VCO (1.58 GHz), no external VCO needed; different pinout and SPI interface; higher typical phase noise floor (−215 dBc/Hz). | Preferred for compact, single-chip LO solutions in portable test gear where board space is constrained. | Choose LMX2531LQ1580E/NOPB when integrating VCO eliminates BOM count and layout complexity outweighs phase noise penalty. |
Compared with ADF4154BRU-REEL7, the ADF4153BRUZ-RL7 offers identical architecture without fast-lock or 4 GHz support, while the LMX2531LQ1580E/NOPB trades external VCO flexibility for monolithic integration - making ADF4154BRU-REEL7 optimal for high-performance, externally tuned RF systems demanding sub-110 µs lock time.
Availability
ADF4154BRU-REEL7 is available at Aetrix Electronics and suitable for base station infrastructure, wireless handset RF front-ends, and CATV upconverter designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADF4154BRU-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 automotive markets with precision signal processing solutions.
The ADF4154BRU-REEL7 belongs to Analog Devices' ADF4xxx fractional-N PLL synthesizer family, designed specifically for low-phase-noise, fast-settling LO generation in wireless infrastructure and handheld radio systems.
FAQ
What is the maximum RF input frequency supported by the ADF4154BRU-REEL7?
The ADF4154BRU-REEL7 supports RF input frequencies from 0.5 GHz to 4.0 GHz, as specified in the B-version datasheet under RF CHARACTERISTICS. This range enables direct interfacing with VCOs used in WiMAX, W-CDMA, and LTE base station applications without requiring external prescalers.
Does the ADF4154BRU-REEL7 include an integrated VCO?
No, the ADF4154BRU-REEL7 does not include an integrated VCO. It is a fractional-N PLL synthesizer IC that requires an external voltage-controlled oscillator connected to the RFINA/RFINB inputs. The device drives the VCO via its CP output and external loop filter.
How does the fast-lock mode function in the ADF4154BRU-REEL7?
The ADF4154BRU-REEL7 fast-lock mode uses an on-chip programmable timer to maintain wide loop bandwidth during PLL acquisition. Instead of relying on external control, the user configures a countdown value in the fast-lock timer register, allowing automatic transition to narrow bandwidth after lock is achieved - reducing lock time to under 110 µs.
What package type is used for the ADF4154BRU-REEL7?
The ADF4154BRU-REEL7 is supplied in a 16-lead TSSOP package (RU variant), as confirmed by the ordering guide in Rev. C datasheet and pin configuration diagram (Figure 3). The exposed pad (EPAD) must be soldered to AGND for thermal and electrical performance.
Can the ADF4154BRU-REEL7 replace the ADF4113 in an existing design?
Yes, the ADF4154BRU-REEL7 is explicitly stated as pin compatible with the ADF4110/ADF4111/ADF4112/ADF4113, ADF4106, and ADF4153. Register mapping and interface timing are maintained, enabling direct hardware replacement with firmware updates to leverage fractional-N and fast-lock capabilities.
ADF4154BRU-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Fractional N Synthesizer (RF)
- PLL:
- Yes
- Input:
- CMOS, TTL
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 2:1
- Differential - Input:Output:
- Yes/No
- Frequency - Max:
- 4GHz
- Divider/Multiplier:
- No/Yes
- Voltage - Supply:
- 2.7V ~ 3.3V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-TSSOP
ADF4154BRU-REEL7 FAQ
1.How can I place an order for ADF4154BRU-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADF4154BRU-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 ADF4154BRU-REEL7 reliable?
The price and inventory of ADF4154BRU-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADF4154BRU-REEL7 is usually 5 days.
3.What payment methods are accepted for ADF4154BRU-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADF4154BRU-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADF4154BRU-REEL7?
ADF4154BRU-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADF4154BRU-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 ADF4154BRU-REEL7?
For technical support, including ADF4154BRU-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADF4154BRU-REEL7 requirements.
6.How does Aetrix verify that ADF4154BRU-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADF4154BRU-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 ADF4154BRU-REEL7 meets industry standards.
7.What is the process for return or replacement of ADF4154BRU-REEL7?
All ADF4154BRU-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADF4154BRU-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 ADF4154BRU-REEL7 part is unused and in its original packaging.
Return procedure for ADF4154BRU-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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