Analog Devices Inc. ADF4113BRUZ-REEL

Overview

ADF4113BRUZ-REEL from Analog Devices is a 4.0 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 supports GSM, WCDMA, and wireless LAN base station up/downconversion.

For engineers reviewing the ADF4113BRUZ-REEL datasheet, ADF4113BRUZ-REEL pinout, ADF4113BRUZ-REEL application, or ADF4113BRUZ-REEL equivalent, key selection criteria include RF input frequency range (0.2–4.0 GHz), phase noise performance (−91 dBc/Hz @ 1 kHz offset, 900 MHz), lock detect capability, and TSSOP-16 package compatibility with industrial temperature operation (−40°C to +85°C).

Technical Context

The ADF4113BRUZ-REEL implements a digital phase-frequency detector (PFD) with precision charge pump, 14-bit R counter, 6-bit A counter, and 13-bit B counter driving a dual-modulus prescaler (P/P+1) to realize N = BP + A division. Its architecture enables fine frequency resolution and fast lock times in closed-loop PLL systems with external VCO and loop filter.

It supports separate VP supply (up to 6.0 V) for extended tuning voltage headroom in 3 V systems, programmable antibacklash pulse width, and dual lock detection (analog and digital). The 24-bit shift register accepts MSB-first serial data via CLK, DATA, and LE signals with 10 ns setup/hold timing.

Key Specifications

Pinout & Package

TSSOP-16 package with exposed paddle (connected to AGND); RoHS-compliant, tape-and-reel format (REEL suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF PLL synthesizer applications.

Compared with ADF4113BRUZ-REEL, ADF4153BRUZ offers higher frequency and lower noise but demands stricter supply sequencing, while LMX2531LQ1770E/NOPB trades external VCO flexibility for integration-making ADF4113BRUZ-REEL optimal for high-performance, discrete-VCO wireless infrastructure designs.

Availability

ADF4113BRUZ-REEL is available at Aetrix Electronics and suitable for wireless base stations, communications test equipment, and CATV infrastructure requiring stable component supply, long-term lifecycle support, and industrial temperature grade assurance.

Supply support for ADF4113BRUZ-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 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 high-frequency integer-N PLL applications in wireless infrastructure, emphasizing low phase noise, flexible prescaling, and robust lock detection for mission-critical RF systems.

FAQ

What is the maximum RF input frequency supported by the ADF4113BRUZ-REEL?

The ADF4113BRUZ-REEL supports an RF input frequency range of 0.2 GHz to 4.0 GHz at −5 dBm input level. This upper limit is confirmed in the Rev. F datasheet Table 1 under "RF CHARACTERISTICS (5 V)" for ADF4113. Operation beyond 4.0 GHz is not specified and may result in degraded sensitivity or phase noise performance. The ADF4113BRUZ-REEL achieves this using a high-speed prescaler and optimized RF input stage with 130 V/µs slew rate requirement for frequencies below 0.2 GHz.

Does the ADF4113BRUZ-REEL require an external loop filter?

Yes, the ADF4113BRUZ-REEL requires an external passive loop filter between the CP pin and the VCO tuning input. The IC provides only the PFD, charge pump, and dividers; it does not integrate a loop filter or VCO. Designers must select resistor and capacitor values based on desired loop bandwidth, phase margin, and reference spur suppression - typically using third-order passive topologies. The ADF4113BRUZ-REEL's programmable charge pump current (via RSET) directly determines filter component scaling.

What package type is used for the ADF4113BRUZ-REEL?

The ADF4113BRUZ-REEL uses a 16-lead TSSOP package (JEDEC MO-153) with an exposed thermal pad. Pin configuration matches Figure 3 in the Rev. F datasheet. The "RUZ" suffix denotes RoHS-compliant TSSOP, and "REEL" indicates tape-and-reel packaging. This package supports standard surface-mount assembly and requires the exposed paddle to be soldered to AGND for optimal thermal and electrical performance.

How does the ADF4113BRUZ-REEL handle power-down functionality?

The ADF4113BRUZ-REEL implements hardware power-down via the CE (chip enable) pin: a logic low forces the device into sleep mode with 1 µA typical quiescent current and places the CP output in high-impedance state. Software power-down is also available via Bit F2 in Register 3. Both modes disable internal clocks and counters while preserving register contents. The ADF4113BRUZ-REEL resumes full operation within microseconds after CE returns high, provided the power supplies remain active.

Can the ADF4113BRUZ-REEL generate frequencies below 200 MHz?

Yes, the ADF4113BRUZ-REEL can synthesize frequencies as low as 0.2 GHz (200 MHz), but operation below that requires attention to slew rate: the datasheet mandates >130 V/µs for frequencies below 0.2 GHz to ensure reliable prescaler triggering. At lower frequencies, users must verify input signal edge speed - often requiring a buffer amplifier - and confirm phase noise and spurious performance meet system requirements, as these parameters are not characterized below 200 MHz in the official specifications.