Analog Devices Inc. ADF4113BCPZ-RL7

Overview

ADF4113BCPZ-RL7 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 enables precise frequency synthesis in GSM, WCDMA, and wireless LAN base station transmitters.

For engineers reviewing the ADF4113BCPZ-RL7 datasheet, ADF4113BCPZ-RL7 pinout, ADF4113BCPZ-RL7 application, or ADF4113BCPZ-RL7 equivalent, key selection considerations include its 4.0 GHz RF input range, 200 MHz maximum prescaler output frequency at 5 V, −91 dBc/Hz phase noise at 900 MHz (1 kHz offset), lock detect capability, and LFCSP-20 package with exposed paddle grounded to AGND.

Technical Context

The ADF4113BCPZ-RL7 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 supports wideband PLL design with external loop filter and VCO integration.

It provides analog and digital lock detection, hardware/software power-down modes, and programmable antibacklash pulse width. The separate VP supply (up to 6.0 V) extends tuning voltage headroom in 3 V systems, enabling wider VCO tuning ranges without level-shifting.

Key Specifications

Pinout & Package

ADF4113BCPZ-RL7 uses a 20-lead LFCSP (4 mm × 4 mm, 0.5 mm pitch) with exposed paddle soldered to AGND for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADF4113BCPZ-RL7, ADF4153AACPZ-RL7 integrates the VCO but sacrifices flexibility below 6 GHz, while HMC703LP4E offers broader bandwidth and fractional-N capability at the cost of increased complexity and layout sensitivity.

Availability

ADF4113BCPZ-RL7 is available at Aetrix Electronics and suitable for wireless infrastructure, handheld radio, and test equipment applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADF4113BCPZ-RL7 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 ADF411x family was designed specifically for cost-sensitive, high-volume wireless infrastructure and handset applications requiring robust PLL performance, low power, and flexible programmability in compact packages.

FAQ

What is the maximum RF input frequency supported by the ADF4113BCPZ-RL7?

The ADF4113BCPZ-RL7 supports an RF input frequency range of 0.2 GHz to 4.0 GHz when driven at −5 dBm. At lower input levels (e.g., −10 dBm), the upper limit is 3.7 GHz. This 4.0 GHz rating enables direct synthesis for LTE Band 41, WiMAX, and unlicensed 5 GHz bands using external prescaling or doubling techniques.

How does the separate VP supply improve VCO tuning range in ADF4113BCPZ-RL7 designs?

The ADF4113BCPZ-RL7's VP pin accepts up to 6.0 V independently of AVDD/DVDD (2.7–5.5 V), allowing the charge pump to generate a 0–6 V tuning voltage. This eliminates need for external op-amps or DC-DC boosters in 3 V systems, directly supporting wide-tuning VCOs like those used in broadband wireless access equipment.

Can ADF4113BCPZ-RL7 achieve sub-100 µs lock time, and what conditions are required?

Yes - ADF4113BCPZ-RL7 achieves ~200 µs typical lock time at 900 MHz with 35 kHz loop bandwidth and 200 kHz PFD frequency. Sub-100 µs is possible with higher PFD frequencies (up to 55 MHz), optimized loop filter design, and reduced N-divider values, though phase noise and spur performance must be verified per application.

What is the function of the MUXOUT pin on ADF4113BCPZ-RL7, and how is it configured?

The MUXOUT pin on ADF4113BCPZ-RL7 outputs selectable signals - lock detect, divided RF (÷8 or ÷16), or divided reference - controlled by bits in Register 3. It provides real-time PLL status without interrupting normal operation, enabling closed-loop calibration and fault detection in base station and test equipment systems.

Does ADF4113BCPZ-RL7 support both integer-N and fractional-N synthesis?

No - ADF4113BCPZ-RL7 is an integer-N PLL synthesizer only. It lacks a sigma-delta modulator or fractional divider, so channel spacing is limited to integer multiples of the PFD frequency. For fractional-N capability, consider Analog Devices' ADF4351 or Hittite's HMC703LP4E as alternatives.