My Inquiry
My Account
Analog Devices Inc. ADF4218LBRUZ-REEL
- Part No.:
- ADF4218LBRUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADF4218LBRUZ-REEL.pdf
- Description:
- IC CLK/FREQ SYNTH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,073
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADF4218LBRUZ-REEL from Analog Devices is a dual low-power frequency synthesizer IC designed for RF and IF local oscillator generation in wireless transceivers. It integrates separate RF (up to 3.0 GHz) and IF (up to 1.1 GHz) synthesis paths, a 22-bit serial interface, dual modulus prescalers (32/33 or 64/65 on RF side), and matched ±1% charge pump current. It enables precise LO synthesis in GSM/PCS/WCDMA handset front-ends.
For engineers reviewing the ADF4218LBRUZ-REEL datasheet, ADF4218LBRUZ-REEL pinout, ADF4218LBRUZ-REEL application, or ADF4218LBRUZ-REEL equivalent, key selection criteria include its dual-path architecture, 7.1 mA typical total IDD, 2.6–3.3 V supply with 1.8 V logic compatibility, and TSSOP-20 package with VP1/VP2 extended tuning voltage support.
Technical Context
The ADF4218LBRUZ-REEL implements two independent PLL paths: an RF path with 11-bit B/6-bit A counters and 32/33 or 64/65 prescaler, and an IF path with identical counter structure but 8/9 or 16/17 prescaler selection. Both paths share a common 14-bit R counter and use a digital phase-frequency detector with precision charge pump.
It supports simultaneous RF and IF LO generation via separate RFINA/RFINB and IFINA/IFINB differential inputs, lock detect outputs on MUXOUT, and programmable charge pump currents (1 mA or 4 mA) with <6% sink/source matching. The 3-wire serial interface operates at up to 56 MHz PFD frequency and includes power-down mode with 1 µA standby current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Input Frequency | 0.15–3.0 GHz (supports full-band GSM/PCS/DCS/WCDMA RF LO synthesis) |
| IF Input Frequency | 0.045–1.1 GHz (covers IF stages in heterodyne receivers and transmitters) |
| Total Supply Current | 7.1 mA typical (enables battery-powered handset operation with low thermal load) |
| Charge Pump Current | Selectable 1 mA or 4 mA (allows loop filter optimization for stability vs. settling time trade-off) |
| Reference Input Range | 10–110 MHz (supports crystal oscillators and frequency-divided system clocks) |
| Phase Noise Floor | –171 dBc/Hz @ 30 kHz offset (ensures clean LO spectrum for high-order modulation schemes) |
| Operating Temperature | –40°C to +85°C (qualified for industrial and mobile equipment environments) |
Pinout & Package
TSSOP-20 package (RU-20 option), thermally enhanced with exposed pad; requires analog/digital ground separation and dedicated decoupling on VDD1/VDD2/VP1/VP2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REFIN) | Reference clock input | CMOS-compatible 10–110 MHz reference; threshold at VDD/2, 100 kΩ input resistance |
| 2 (CLK) | Serial interface clock | Rising-edge triggered; supports up to 56 MHz PFD frequency for fast register loading |
| 3 (DATA) | Serial data input | MSB-first 22-bit shift register input; 1.8 V logic compatible |
| 4 (LE) | Load enable | Latches shift register contents into selected control latch (IF/RF R or AB counter) |
| 5 (MUXOUT) | Multiplexer output | Programmable to output IF/RF lock detect, scaled RF, or scaled reference for diagnostics |
| 6 (RFINA) | RF prescaler non-inverting input | Differential RF input (ac-coupled); accepts –15 dBm min signal at 3.0 GHz |
| 7 (CPRF) | RF charge pump output | ±ICP current source/sink driving external loop filter; VP1 ≥ VDD required |
| 8 (AGNDRF) | RF analog ground | Must be isolated from digital ground to minimize noise coupling into VCO control line |
| 9 (RFINB) | RF prescaler inverting input | Complementary RF input; requires 100 pF bypass to AGNDRF |
| 10 (VDD1) | RF section power supply | 2.6–3.3 V; must match VDD2; decoupling critical for RF PSRR |
| 11 (DGNDRF) | RF digital ground | Separate from AGNDRF; connects to digital ground plane under RF section |
| 12 (VDD2) | IF/interface power supply | 2.6–3.3 V; must match VDD1; powers logic, interface, and IF analog blocks |
| 13 (VP1) | RF charge pump supply | VDD1 to 5.5 V; sets maximum tuning voltage range for external VCO |
| 14 (DGNDIF) | IF/digital interface ground | Ground return for DATA/CLK/LE and IF digital logic; separate from AGNDIF |
| 15 (IFINB) | IF prescaler inverting input | Complementary IF input; requires 100 pF bypass to AGNDIF (ADF4218L-specific) |
| 16 (IFINA) | IF prescaler non-inverting input | Differential IF input (ac-coupled); –15 dBm sensitivity up to 1.1 GHz |
| 17 (DGNDIF) | IF digital ground (duplicate pin) | Redundant ground connection for IF digital circuitry; ties to DGNDIF plane |
| 18 (CPIF) | IF charge pump output | ±ICP current source/sink for IF loop filter; VP2 ≥ VDD required |
| 19 (VP2) | IF charge pump supply | VDD2 to 5.5 V; independently adjustable from VP1 for dual-VCO tuning flexibility |
| 20 (AGNDIF) | IF analog ground | Isolated analog ground for IF prescaler and charge pump; prevents IF-RF crosstalk |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent synthesis paths | Simultaneous RF and IF LO generation eliminates need for two discrete synthesizers |
| Selectable dual-modulus prescalers | RF: 32/33 or 64/65; IF: 8/9 or 16/17 - enables wide N-divider coverage with fine resolution |
| Charge pump current matching | 1% typical matching between sink and source ensures minimal static phase error in locked state |
| 1.8 V logic-compatible interface | Enables direct connection to low-voltage FPGAs and baseband processors without level shifters |
| Low-power sleep mode | 1 µA typical standby current allows rapid wake-up while minimizing battery drain |
| Separate VP supplies for RF/IF | VP1 and VP2 independently configurable up to 5.5 V - supports diverse VCO tuning ranges |
Applications
| Wireless Handset Transceiver | Base Station Local Oscillator |
|---|---|
|
Use Scenario: Dual-conversion GSM/PCS/WCDMA handset requiring independent RF and IF LOs for transmit and receive paths. IC Role / Device Role / Timing Role: Generates synchronized RF LO (e.g., 1.95 GHz) and IF LO (e.g., 450 MHz) from shared 10 MHz reference. Use Value: Reduces component count by replacing two single-path synthesizers; 7.1 mA total IDD extends talk time. |
Use Scenario: Multi-carrier base station transceiver needing stable, low-phase-noise LOs for up/down-conversion across multiple bands. IC Role / Device Role / Timing Role: Provides RF LO for power amplifier driver stage and IF LO for mixer in diversity receiver chain. Use Value: –171 dBc/Hz phase noise floor at 30 kHz offset meets stringent ACLR requirements for 4G LTE transmission. |
| Wireless LAN Front-End | Cable TV Tuner |
|
Use Scenario: 5 GHz Wi-Fi 802.11a/n/ac radio requiring agile LO switching between channels with fast lock time. IC Role / Device Role / Timing Role: Synthesizes 5.15–5.825 GHz RF LO using external VCO and 32/33 prescaler; IF path used for image-reject downconversion. Use Value: Programmable charge pump (1/4 mA) and 56 MHz max PFD frequency enable sub-100 µs lock times. |
Use Scenario: CATV set-top box tuner needing robust LO generation across 47–862 MHz IF band with high spurious suppression. IC Role / Device Role / Timing Role: Generates IF LO for quadrature demodulator; RF path unused or configured as auxiliary synthesizer. Use Value: –78 dBc typical reference spurs at fPFD/2 ensure compliance with DOCSIS spectral mask requirements. |
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 |
|---|---|---|---|
| ADF4217LBRUZ-REEL | Same TSSOP-20 package; identical RF/IF architecture but lower RF max frequency (2.5 GHz @ –15 dBm) | Suitable for cost-sensitive PCS/DCS handsets where 3.0 GHz RF headroom is unnecessary | Select when RF band requirement is ≤2.5 GHz and bill-of-materials cost reduction is prioritized |
| ADF4219LBRUZ-REEL | Higher IF counter depth (13-bit B/5-bit A vs. 11/6); IF prescaler selectable 8/9 or 16/17; IF max 1.0 GHz (P=16/17) or 0.55 GHz (P=8/9) | Better suited for narrowband IF applications requiring finer frequency resolution below 1 GHz | Select when IF synthesis resolution or sub-1 GHz IF bandwidth is critical, accepting reduced IF max frequency |
Compared with ADF4217LBRUZ-REEL and ADF4219LBRUZ-REEL, the ADF4218LBRUZ-REEL provides optimal balance of RF bandwidth (3.0 GHz), IF bandwidth (1.1 GHz), and counter flexibility for mainstream multi-band wireless handsets - making it the default choice unless specific bandwidth or resolution constraints favor one variant.
Availability
ADF4218LBRUZ-REEL is available at Aetrix Electronics and suitable for wireless handset design, base station RF front-end development, and cable TV tuner production requiring stable component supply and long-term manufacturability.
Supply support for ADF4218LBRUZ-REEL 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 ADF421xL family was engineered specifically for dual-path LO synthesis in battery-powered wireless infrastructure and handset applications, emphasizing low power, integrated dual-loop capability, and robust RF/IF isolation.
FAQ
What is the maximum RF input frequency supported by the ADF4218LBRUZ-REEL?
The ADF4218LBRUZ-REEL supports RF input frequencies up to 3.0 GHz at –10 dBm minimum signal level, and up to 2.5 GHz at –15 dBm. This covers all major cellular bands including GSM, PCS, DCS, CDMA, and WCDMA. The device uses a CML-input prescaler and requires proper ac-coupling and biasing per the datasheet layout guidelines for reliable operation at these frequencies.
Does the ADF4218LBRUZ-REEL support independent power domains for RF and IF sections?
Yes, the ADF4218LBRUZ-REEL features separate power supplies: VDD1/VDD2 (2.6–3.3 V) for RF and IF digital/analog circuitry, and independent VP1/VP2 (up to 5.5 V) for RF and IF charge pumps. This allows independent tuning voltage ranges for dual VCOs and minimizes cross-talk between RF and IF loops - a key advantage over single-supply synthesizers.
How does the ADF4218LBRUZ-REEL achieve low phase noise performance?
The ADF4218LBRUZ-REEL achieves –171 dBc/Hz phase noise floor at 30 kHz offset through a low-noise digital PFD, precision-matched charge pump (1% typical sink/source matching), and optimized internal divider architecture. Its phase noise is further enhanced by low-jitter reference handling and differential RF/IF inputs that reject common-mode noise - critical for maintaining EVM in QAM-modulated systems.
Can the ADF4218LBRUZ-REEL generate both RF and IF LO signals simultaneously?
Yes, the ADF4218LBRUZ-REEL is explicitly designed for concurrent RF and IF LO generation. Its dual-path architecture includes independent RFINA/RFINB and IFINA/IFINB inputs, separate CPRF/CPIF charge pump outputs, and fully programmable RF and IF counters - enabling true simultaneous synthesis without time multiplexing or performance compromise.
What package type and pin count does the ADF4218LBRUZ-REEL use?
The ADF4218LBRUZ-REEL is supplied in a 20-lead Thin Shrink Small Outline Package (TSSOP-20, RU-20 option) with an exposed thermal pad. It features fully differentiated analog/digital ground pins (AGNDRF/DGNDRF/AGNDIF/DGNDIF), dual VP supplies, and a 3-wire serial interface - all arranged to support high-density RF PCB layouts with strict isolation requirements.
ADF4218LBRUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Clock/Frequency Synthesizer (RF/IF)
- PLL:
- Yes
- Input:
- CMOS, TTL
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 3:1
- Differential - Input:Output:
- Yes/No
- Frequency - Max:
- 3GHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 2.6V ~ 3.3V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-TSSOP
ADF4218LBRUZ-REEL FAQ
1.How can I place an order for ADF4218LBRUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADF4218LBRUZ-REEL 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 ADF4218LBRUZ-REEL reliable?
The price and inventory of ADF4218LBRUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADF4218LBRUZ-REEL is usually 5 days.
3.What payment methods are accepted for ADF4218LBRUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADF4218LBRUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADF4218LBRUZ-REEL?
ADF4218LBRUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADF4218LBRUZ-REEL 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 ADF4218LBRUZ-REEL?
For technical support, including ADF4218LBRUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADF4218LBRUZ-REEL requirements.
6.How does Aetrix verify that ADF4218LBRUZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADF4218LBRUZ-REEL 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 ADF4218LBRUZ-REEL meets industry standards.
7.What is the process for return or replacement of ADF4218LBRUZ-REEL?
All ADF4218LBRUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADF4218LBRUZ-REEL, 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 ADF4218LBRUZ-REEL part is unused and in its original packaging.
Return procedure for ADF4218LBRUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADF4218LBRUZ-REEL Tags
-
CD74HCT4046AM96
Texas Instruments
-
MC14046BDWR2G
onsemi
-
501MILFT
Renesas
-
CD74HC7046AM
Texas Instruments
-
CDCVF2505PWR
Texas Instruments
-
RC19004A100GNL#KB0
Renesas
-
SI5351A-B-GTR
Skyworks Solutions Inc.
-
CY2305SXI-1T
Infineon Technologies
-
570BILFT
Renesas
-
CDCE913PWR
Texas Instruments
-
CY2305SXI-1HT
Infineon Technologies
-
DS1086LU+T
Analog Devices Inc./Maxim Integrated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
