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Analog Devices Inc. ADF4112BRU-REEL7
- Part No.:
- ADF4112BRU-REEL7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADF4112BRU-REEL7.pdf
- Description:
- IC CLK/FREQ SYNTH 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,598
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Product details
Overview
ADF4112BRU-REEL7 from Analog Devices is a 3.0 GHz RF PLL frequency synthesizer IC used as a local oscillator in wireless transceivers. It features a dual-modulus prescaler (8/9, 16/17, 32/33, 64/65), programmable charge pump current up to 5 mA, 3-wire serial interface, and operates from 2.7 V to 5.5 V. It enables precise frequency synthesis in GSM, WCDMA, and wireless LAN base station transmitters.
For engineers reviewing the ADF4112BRU-REEL7 datasheet, ADF4112BRU-REEL7 pinout, ADF4112BRU-REEL7 application, or ADF4112BRU-REEL7 equivalent, key selection criteria include its 0.2–3.0 GHz RF input range (at −10 dBm), 200 kHz phase detector frequency capability, integrated PFD and charge pump, analog/digital lock detect, and support for external loop filter + VCO architectures.
Technical Context
The ADF4112BRU-REEL7 implements an N-divider (N = BP + A) using a 13-bit B counter, 6-bit A counter, and dual-modulus prescaler (P/P+1). Its phase frequency detector (PFD) drives a precision charge pump with programmable current via RSET, enabling stable control of external VCO tuning voltage.
It supports reference input frequencies from 5 MHz to 104 MHz with CMOS-level sensitivity (0.4–3.0 Vp-p), and provides MUXOUT for selectable outputs including lock detect, scaled RF, or scaled reference - all synchronized to the internal logic clock domain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Input Frequency | 0.2–3.0 GHz at −10 dBm input level; defines usable VCO output band when paired with external loop filter |
| Phase Detector Max Frequency | 55 MHz; sets upper limit on PFD rate, directly constraining loop bandwidth and lock time |
| Charge Pump Current | Programmable up to 5 mA (RSET = 4.7 kΩ); determines loop filter component sizing and VCO tuning slope response |
| Supply Voltage Range | 2.7–5.5 V for AVDD/DVDD; VP ≥ AVDD up to 6.0 V enables extended VCO tuning voltage range |
| Interface | 3-wire serial (DATA/CLK/LE); enables register programming without dedicated SPI peripheral |
| Lock Detection | Analog and digital lock detect outputs; provides hardware-ready signal for system synchronization and fault monitoring |
| Operating Temperature | −40°C to +85°C (Industrial B Version); qualified for base station and outdoor wireless infrastructure use |
Pinout & Package
TSSOP-16 package with exposed paddle (connected to AGND); RoHS-compliant, tape-and-reel format (REEL7).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RSET | Charge pump current setting | Resistor-to-ground sets ICPmax; 4.7 kΩ yields 5 mA sink/source for optimal loop filter design |
| CP | Charge pump output | Drives external loop filter capacitor; polarity and magnitude controlled by PFD state and ICP setting |
| CPGND | Charge pump ground return | Dedicated low-noise ground path isolates CP current from digital switching noise |
| RFINA / RFINB | Differential RF input | Accepts ac-coupled VCO output; RFINB requires 100 pF bypass to AGND for stability |
| REFIN | Reference clock input | CMOS-compatible (VTH ≈ VDD/2); accepts crystal oscillator or buffered clock up to 104 MHz |
| CE | Chip enable | Active-low; places device in low-power sleep mode (1 µA) and forces CP into high-impedance state |
| MUXOUT | Multiplexed diagnostic output | Selectable between lock detect, divided RF, or divided REFIN - aids in bring-up and real-time monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Separate VP supply | Enables 6 V tuning voltage headroom even in 3 V systems, supporting wide-range VCOs without level-shifting |
| Programmable antibacklash pulse width | Reduces reference spurs by minimizing PFD dead-zone effects during phase correction transitions |
| Dual power domains (AVDD/DVDD) | Allows independent analog/digital supply filtering; minimizes coupling of digital noise into sensitive RF path |
| Hardware/software power-down | CE pin + F2 register bit provide two independent control paths for deterministic low-power sequencing |
| 24-bit shift register | Supports full configuration of R, A, B, and function latches in single 24-clock sequence, simplifying firmware initialization |
Applications
| Base Station Transmitter LO | Wireless LAN Access Point |
|---|---|
Use Scenario: Generating local oscillator signal for upconversion in macrocell BTS operating at 1960 MHz (WCDMA Band I). IC Role / Device Role / Timing Role: PLL frequency synthesizer providing phase-coherent, low-spur LO with 200 kHz PFD and 20 kHz loop bandwidth. Use Value: Achieves −84 dBc/Hz phase noise at 1 kHz offset and −80/−84 dBc spurs, meeting 3GPP spectral mask requirements. | Use Scenario: Synthesizing 5.25 GHz LO for IEEE 802.11a/n/ac access point RF front-end. IC Role / Device Role / Timing Role: Configurable N-divider driving external VCO; uses 64/65 prescaler to handle high-frequency input while maintaining PFD ≤55 MHz. Use Value: Supports fast frequency hopping via serial reprogramming; lock time <400 µs enables dynamic channel switching. |
| GSM Handset Transmitter | Communications Test Equipment |
Use Scenario: Providing 900 MHz or 1800 MHz LO in dual-band GSM handset power amplifier feedback path. IC Role / Device Role / Timing Role: Low-power PLL synthesizer operating at 3 V with VP = 3 V; leverages CE pin for burst-mode power gating. Use Value: Draws only 6.5 mA typical IDD; achieves −90 dBc/Hz phase noise at 1 kHz offset, ensuring EVM compliance. | Use Scenario: Programmable LO source in vector signal analyzer requiring rapid frequency reconfiguration across 100 MHz–3 GHz. IC Role / Device Role / Timing Role: Standalone synthesizer core with MUXOUT-driven lock detect, enabling automated calibration and sweep synchronization. Use Value: 3-wire interface allows microcontroller-based control without FPGA; supports 10 kHz–1 MHz PFD rates for flexible loop optimization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PLL synthesizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADF4153BRUZ | Higher max RF input (4.4 GHz), integrated LDO, lower phase noise floor (−222 dBc/Hz), but no separate VP pin | Better suited for 5G FR1 and high-performance test equipment where ultra-low noise is critical | Choose ADF4153BRUZ if VCO tuning voltage ≤ DVDD and −222 dBc/Hz noise floor is required; ADF4112BRU-REEL7 remains preferred when VP > DVDD is needed for wide-tuning VCOs |
| LMX2531LQ1770E/NOPB | Integrated VCO, 1770 MHz max output, fractional-N architecture, SPI interface, higher power consumption (22 mA) | Targeted at compact, self-contained synthesizers where board space is constrained and fractional division is acceptable | Choose LMX2531LQ1770E/NOPB for space-constrained designs needing integrated VCO; ADF4112BRU-REEL7 is optimal when discrete VCO selection, low power, and integer-N spurious performance are priorities |
Compared with ADF4153BRUZ and LMX2531LQ1770E/NOPB, the ADF4112BRU-REEL7 offers unique VP-supply flexibility for extended VCO tuning range, lower quiescent current (7.5 mA max), and proven integer-N spurious performance in licensed-band infrastructure - making it ideal for cost-sensitive, high-reliability wireless base stations.
Availability
ADF4112BRU-REEL7 is available at Aetrix Electronics and suitable for wireless infrastructure, communications test equipment, and CATV equipment requiring stable component supply, long-term lifecycle support, and industrial temperature operation.
Supply support for ADF4112BRU-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 industrial, communications, and automotive markets with precision signal processing solutions.
The ADF411x family was designed specifically for integer-N PLL-based local oscillator generation in wireless infrastructure and handheld radios, emphasizing low phase noise, flexible power supply architecture, and robust lock detection.
FAQ
What is the maximum RF input frequency supported by the ADF4112BRU-REEL7?
The ADF4112BRU-REEL7 supports an RF input frequency range of 0.2 GHz to 3.0 GHz at −10 dBm input level. This specification applies under standard 3 V operation with appropriate slew rate (>75 V/µs for lower frequencies). The device's internal prescaler and counters are rated for up to 200 MHz output, so prescaler selection must ensure the divided RF remains within that limit.
Does the ADF4112BRU-REEL7 require an external loop filter?
Yes, the ADF4112BRU-REEL7 requires an external passive loop filter between the CP pin and the VCO tuning input. It integrates only the PFD and charge pump; the loop filter components (resistors, capacitors, optional op-amp) must be selected based on desired loop bandwidth, phase margin, and VCO gain. Reference designs for common configurations are provided in the ADF4112BRU-REEL7 datasheet.
Can the ADF4112BRU-REEL7 operate with different analog and digital supply voltages?
No - AVDD and DVDD must be equal (2.7 V to 5.5 V), as specified in the Absolute Maximum Ratings table. However, VP may be set independently (≥ AVDD, up to 6.0 V) to extend the tuning voltage range delivered to the VCO. This separation allows 3 V logic operation while supporting 6 V VCO tuning, a key advantage of the ADF4112BRU-REEL7 architecture.
How does the MUXOUT pin function on the ADF4112BRU-REEL7?
The MUXOUT pin on the ADF4112BRU-REEL7 provides three selectable outputs via internal register control: digital lock detect, a divided version of the RF input (÷8, ÷16, ÷32, or ÷64), or a divided version of the reference input (÷2, ÷4, ÷8, or ÷16). This enables real-time verification of lock status and simplifies frequency verification during system bring-up without additional test equipment.
Is the ADF4112BRU-REEL7 pin-compatible with other devices in the ADF411x family?
Yes - the ADF4112BRU-REEL7 shares identical pinout and package (TSSOP-16) with ADF4110BRU-REEL7, ADF4111BRU-REEL7, and ADF4113BRU-REEL7. All four devices are drop-in replacements at the board level; functional differences (e.g., max RF frequency, current consumption) are determined solely by internal design and do not affect layout or interconnect.
ADF4112BRU-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
ADF4112BRU-REEL7 FAQ
1.How can I place an order for ADF4112BRU-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADF4112BRU-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 ADF4112BRU-REEL7 reliable?
The price and inventory of ADF4112BRU-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADF4112BRU-REEL7 is usually 5 days.
3.What payment methods are accepted for ADF4112BRU-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADF4112BRU-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADF4112BRU-REEL7?
ADF4112BRU-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADF4112BRU-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 ADF4112BRU-REEL7?
For technical support, including ADF4112BRU-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADF4112BRU-REEL7 requirements.
6.How does Aetrix verify that ADF4112BRU-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADF4112BRU-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 ADF4112BRU-REEL7 meets industry standards.
7.What is the process for return or replacement of ADF4112BRU-REEL7?
All ADF4112BRU-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADF4112BRU-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 ADF4112BRU-REEL7 part is unused and in its original packaging.
Return procedure for ADF4112BRU-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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