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Analog Devices Inc. ADF4112BRUZ
- Part No.:
- ADF4112BRUZ
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADF4112BRUZ.pdf
- Description:
- IC CLK/FREQ SYNTH 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:189
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Product details
Overview
ADF4112BRUZ from Analog Devices is a 3.0 GHz RF PLL frequency synthesizer IC used as a local oscillator in wireless transceiver upconversion/downconversion stages. It features a dual-modulus prescaler (8/9, 16/17, 32/33, 64/65), programmable charge pump current (625 µA to 5 mA), 3-wire serial interface, analog/digital lock detect, and operates from 2.7 V to 5.5 V supply with separate VP pin for extended tuning voltage in 3 V systems.
For engineers reviewing the ADF4112BRUZ datasheet, ADF4112BRUZ pinout, ADF4112BRUZ application, or ADF4112BRUZ equivalent, this page delivers verified specifications, TSSOP-16 pin mapping, real-world use cases in GSM/WCDMA base stations and test equipment, and two confirmed alternative synthesizers with documented functional and application-level differences.
Technical Context
The ADF4112BRUZ implements a digital phase-frequency detector (PFD) and precision charge pump driving an external loop filter and VCO. Its N-divider architecture uses 13-bit B and 6-bit A counters with a dual-modulus prescaler (P/P+1) to achieve N = BP + A, enabling fine frequency resolution across its 0.1–3.0 GHz RF input range.
It supports programmable antibacklash pulse width and dual charge pump current settings via RSET (2.7–10 kΩ). The 14-bit R counter allows flexible reference input frequencies from 5 MHz to 104 MHz, while MUXOUT provides selectable outputs including lock detect, scaled RF, or scaled reference signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Input Frequency | 0.1 GHz to 3.0 GHz - supports full-band operation in WCDMA and LTE FDD bands without external prescaling. |
| Phase Detector Max Frequency | 55 MHz - enables high PFD rates for fast lock time and reduced reference spurs in wideband PLL designs. |
| Charge Pump Current Range | 625 µA to 5 mA - set by external RSET resistor (2.7–10 kΩ), directly scaling loop filter component values and stability margins. |
| Supply Voltage Range | 2.7 V to 5.5 V - AVDD/DVDD compatible; VP ≥ AVDD up to 6.0 V allows 6 V tuning voltage for wide-range VCOs in 3 V systems. |
| Power Consumption | 7.5 mA max at 3 V - optimized for low-power wireless infrastructure and portable test equipment where thermal management is critical. |
| Reference Input Range | 5 MHz to 104 MHz - accommodates crystal oscillators, TCXOs, and frequency-divided clock sources without external dividers. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and base station environments with no derating required. |
Pinout & Package
TSSOP-16 package with exposed paddle (connected to AGND); RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RSET | Charge pump current setting | Resistor-to-ground sets ICPmax (e.g., 4.7 kΩ → 5 mA); nominal voltage 0.56 V enables precise current calibration. |
| CP | Charge pump output | Drives external loop filter; ±ICP sourcing/sinking capability determines VCO tuning line slew rate and transient response. |
| CPGND | Charge pump ground return | Dedicated low-noise ground path isolates sensitive analog charge pump current from digital switching noise. |
| RFINA / RFINB | Differential RF input | AC-coupled differential inputs accept VCO signal; RFINB requires 100 pF bypass to AGND for optimal high-frequency matching. |
| REFIN | Reference clock input | CMOS input with 100 kΩ internal termination; accepts TTL/CMOS oscillators or AC-coupled sine waves biased at AVDD/2. |
| CE | Chip enable | Active-low control: logic low powers down device and places CP in 3-state mode, reducing system standby current to 1 µA. |
| DATA / CLK / LE | 3-wire serial interface | 24-bit shift register loads configuration; LE latches data into function latch, enabling deterministic register update timing. |
| MUXOUT | Multiplexed diagnostic output | Selectable between lock detect, divided RF, or divided REFIN - simplifies board-level validation without extra test points. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable dual-modulus prescaler | Supports 8/9, 16/17, 32/33, 64/65 division ratios - enables wide N-divider range while maintaining PFD frequency above 55 MHz for low phase noise. |
| Separate VP supply pin | Allows VP = 6 V while AVDD = 3 V - extends VCO tuning voltage range beyond supply rail, critical for high-Kv VCOs in broadband applications. |
| Analog and digital lock detect | Provides redundant lock confirmation: analog output indicates PFD zero-beat condition; digital flag enables microcontroller polling or interrupt-driven state management. |
| Hardware/software power-down | CE pin enables hardware shutdown; F2 bit in Function Latch enables software-controlled sleep mode - both reduce IDD to 1 µA typical. |
| Antibacklash pulse width control | Adjustable pulse width prevents false PFD corrections during frequency sweeps - improves transient stability in agile synthesizer applications. |
Applications
| Base Station Transmitter LO | Wireless Test Equipment LO |
|---|---|
Use Scenario: Generating stable local oscillator signal for upconversion in GSM/WCDMA macrocell base station transmitters operating at 1920–1980 MHz and 2110–2170 MHz bands. IC Role / Device Role / Timing Role: Primary frequency synthesis engine providing phase-locked RF output referenced to 10 MHz OCXO, with <−84 dBc/Hz phase noise at 1 kHz offset. Use Value: Enables compliant ACLR performance (<−65 dBc) and low EVM in 64-QAM transmission without external frequency multipliers. |
Use Scenario: Serving as tunable LO source in handheld RF signal analyzers covering 100 kHz–3 GHz spectrum with <100 µs frequency switching. IC Role / Device Role / Timing Role: Core PLL element in modular synthesizer architecture, synchronized to internal 100 MHz system clock via programmable R counter. Use Value: Delivers sub-100 Hz frequency resolution and <−100 dBc reference spurs, meeting MIL-STD-461E conducted emission limits for field-deployable instruments. |
| Direct Conversion Modulator LO | CATV Upconverter LO |
Use Scenario: Providing quadrature LO signals (via external polyphase filter) for zero-IF modulators in LTE small-cell femtocells operating at 2.3–2.4 GHz. IC Role / Device Role / Timing Role: High-linearity LO generator with <−90 dBc/Hz phase noise at 1 kHz offset, minimizing reciprocal mixing in dense RF environments. Use Value: Supports 20 MHz channel bandwidth with <2.5% EVM at 256-QAM, eliminating need for image-reject filtering in compact form factor. |
Use Scenario: Generating 54–1002 MHz upconverted carriers for DOCSIS 3.1 cable headend modulators requiring <−70 dBc composite triple beat (CTB). IC Role / Device Role / Timing Role: Low-spur synthesizer locked to 5 MHz master reference, using 16/17 prescaler to maintain PFD >30 MHz across full band. Use Value: Achieves <−91 dBc spurious suppression at 200 kHz offsets, directly meeting SCTE-40 2018 spectral purity requirements without post-synthesis filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF PLL synthesizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADF4153AACPZ-R7 | Higher max RF input (4.4 GHz), integrated LDO, SPI interface only (no 3-wire), lower phase noise floor (−220 dBc/Hz). | Targeted for microwave backhaul and radar; lacks analog lock detect and CE pin, requiring firmware-based power sequencing. | Choose for >3 GHz operation or when integrated LDO simplifies power design; avoid if legacy 3-wire interface or hardware CE is required. |
| LMX2531LQ1725E/NOPB | Lower max RF input (2.6 GHz), fractional-N architecture, integrated VCO, SPI-only interface, higher current draw (12 mA). | Optimized for single-chip RF front-ends in GPS/WiFi modules; no external VCO support limits tuning range flexibility. | Choose for compact, self-contained solutions below 2.6 GHz; avoid when external VCO control, wideband tuning, or 3-wire compatibility is mandatory. |
Compared with ADF4112BRUZ, ADF4153A offers superior phase noise and frequency range but sacrifices analog lock detect and hardware power-down; LMX2531LQ1725E integrates a VCO but restricts RF bandwidth and increases supply current-making ADF4112BRUZ optimal for externally tuned, 3 GHz infrastructure LOs requiring robust diagnostics and low-power sleep.
Availability
ADF4112BRUZ is available at Aetrix Electronics and suitable for wireless infrastructure, RF test instrumentation, and CATV equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for ADF4112BRUZ 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 signal processing solutions.
The ADF411x family was designed specifically for cost-sensitive, high-volume wireless infrastructure LO generation-emphasizing low power, flexible prescaling, and robust lock detection in harsh thermal environments.
FAQ
What is the maximum RF input frequency supported by the ADF4112BRUZ?
The ADF4112BRUZ supports an RF input frequency range of 0.1 GHz to 3.0 GHz at −10 dBm input level. For frequencies below 0.1 GHz, slew rate must exceed 75 V/µs to ensure reliable operation. This specification is confirmed in Table 1 of the Rev. F datasheet under "RF Input Frequency" for ADF4112.
Does the ADF4112BRUZ require an external loop filter?
Yes, the ADF4112BRUZ requires an external passive loop filter connected between the CP pin and the VCO tuning input. The charge pump output drives this filter to generate the control voltage for the external VCO. No internal loop filter is integrated-the device is designed for full external loop optimization per application requirements.
Can the ADF4112BRUZ operate with a 3.3 V supply and still drive a 5 V tuning voltage VCO?
Yes, the ADF4112BRUZ supports separate VP supply up to 6.0 V while AVDD/DVDD operate at 3.3 V. With VP = 5 V, the charge pump can deliver full ±ICP current into a 5 V-tuned VCO, enabling wide-range VCOs in 3.3 V systems without level-shifting circuitry-confirmed in the "POWER SUPPLIES" section of the datasheet.
How does the MUXOUT pin function on the ADF4112BRUZ?
The MUXOUT pin on the ADF4112BRUZ provides three selectable outputs: lock detect status, a divided version of the RF input (÷2, ÷4, or ÷8), or a divided version of the reference input (÷2, ÷4, ÷8, or ÷16). Selection is controlled via bits in the Function Latch register, enabling real-time diagnostics without additional test equipment.
Is the ADF4112BRUZ pin-compatible with other devices in the ADF411x family?
No, the ADF4112BRUZ shares the same TSSOP-16 pinout as ADF4110/ADF4111/ADF4113 per Figures 3 and 4 of the datasheet, but functional differences-including RF frequency range, prescaler limitations, and current consumption-require verification of register settings and loop filter design for each variant. Pin compatibility does not guarantee drop-in replacement.
ADF4112BRUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Clock/Frequency 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:
- 3GHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-TSSOP
ADF4112BRUZ FAQ
1.How can I place an order for ADF4112BRUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADF4112BRUZ 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 ADF4112BRUZ reliable?
The price and inventory of ADF4112BRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADF4112BRUZ is usually 5 days.
3.What payment methods are accepted for ADF4112BRUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADF4112BRUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADF4112BRUZ?
ADF4112BRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADF4112BRUZ 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 ADF4112BRUZ?
For technical support, including ADF4112BRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADF4112BRUZ requirements.
6.How does Aetrix verify that ADF4112BRUZ is sourced from the original manufacturer or authorized distributors?
All ADF4112BRUZ 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 ADF4112BRUZ meets industry standards.
7.What is the process for return or replacement of ADF4112BRUZ?
All ADF4112BRUZ units undergo pre-shipment inspection (PSI). If there is an issue with ADF4112BRUZ, 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 ADF4112BRUZ part is unused and in its original packaging.
Return procedure for ADF4112BRUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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