Analog Devices Inc. ADF4213BCP

Overview

ADF4213BCP from Analog Devices is a dual RF/IF PLL frequency synthesizer designed for local oscillator (LO) generation in wireless transceivers, supporting RF input up to 3.0 GHz and IF input up to 1.0 GHz at 3 V supply, with programmable dual-modulus prescaler (8/9, 16/17, 32/33, 64/65), 3-wire serial interface, and analog/digital lock detect - used in WCDMA base stations and 2.4 GHz WLAN front-ends.

For engineers reviewing the ADF4213BCP datasheet, ADF4213BCP pinout, ADF4213BCP application, or ADF4213BCP equivalent, key selection criteria include its 3.0 GHz RF input capability, separate charge pump supplies (VP1/VP2), fastlock mode, phase noise floor of –171 dBc/Hz at 25 kHz PFD frequency, and CP-20 chip-scale package compatibility with high-density RF layouts.

Technical Context

The ADF4213BCP implements two independent PLL paths - RF and IF - each with a 12-bit B-counter, 6-bit A-counter, and programmable dual-modulus prescaler (P/P+1), enabling N-divider synthesis via N = BP + A. Its low-noise digital phase-frequency detector (PFD) features a 3 ns antibacklash pulse to eliminate dead zone and stabilize reference spurs.

It supports independent charge pump current programming (via RSET) for RF and IF sections, separate VP1/VP2 supplies enabling extended tuning voltage (up to 6 V) in 3 V systems, and MUXOUT-configurable internal node access including RF/IF lock detect, R/N counter outputs, and scaled reference - all controlled via 24-bit 3-wire serial interface with LSB control bits C1/C2 selecting latch destination.

Key Specifications

Pinout & Package

ADF4213BCP is housed in a 20-pin Chip Scale Package (CP-20), 3.2 mm × 3.2 mm, 0.5 mm pitch, with exposed paddle for thermal dissipation. Pin mapping follows the CP-20 top-view layout defined in Analog Devices' datasheet Rev. A, page 5.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADF4212BRU and LMX2531LQ1725E, the ADF4213BCP uniquely delivers 3.0 GHz RF synthesis in a 3.2 mm × 3.2 mm CSP while maintaining full dual-path flexibility - making it the only option for compact, dual-band 5G NR sub-6 GHz front-ends requiring independent RF/IF LOs.

Availability

ADF4213BCP is available at Aetrix Electronics and suitable for WCDMA infrastructure, 802.11ac access points, and CATV upconverter modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADF4213BCP 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 ADF421x family was engineered specifically for dual-conversion wireless transceivers, delivering tightly coupled RF/IF PLL synthesis with low phase noise, flexible prescaling, and robust lock detection in compact packages.

FAQ

What is the maximum RF input frequency supported by the ADF4213BCP at 3 V supply?

The ADF4213BCP supports an RF input frequency range of 0.2 GHz to 3.0 GHz when operated at 3 V supply (VDD1 = VDD2 = 3 V), as specified in the "RF/IF CHARACTERISTICS (3 V)" table on page 2 of the datasheet Rev. A. This makes the ADF4213BCP suitable for 2.4 GHz ISM, 2.6 GHz LTE, and 3.0 GHz 5G NR sub-6 GHz bands without external prescaling.

Does the ADF4213BCP support independent programming of RF and IF charge pump currents?

Yes, the ADF4213BCP supports independent charge pump current programming for RF and IF paths via shared RSET pin configuration - the same resistor sets both CPRF and CPIF maximum currents according to ICP = 13.5 / RSET (kΩ). The datasheet confirms identical ICP ranges (625 µA–5 mA) and matching specs (2% sink/source current matching) for both sections.

How does the MUXOUT pin function on the ADF4213BCP, and what signals can it output?

The MUXOUT pin on the ADF4213BCP is a configurable multiplexer output controlled by bits P3, P4, P11, and P12. It can output RF/IF analog lock detect, RF/IF digital lock detect, RF/IF R-counter output, RF/IF N-counter output, or scaled reference frequency - enabling real-time internal node monitoring without additional test points or probes.

What package type and thermal characteristics apply to the ADF4213BCP?

The ADF4213BCP uses the CP-20 chip-scale package (3.2 mm × 3.2 mm, 0.5 mm pitch) with exposed thermal paddle. Its θJA is 122°C/W when the paddle is soldered, and 216°C/W when unsoldered (datasheet Rev. A, page 4). This low thermal resistance supports continuous operation at 15 mA typical IDD in compact RF modules.

Can the ADF4213BCP operate with a 5 V supply, and how does that affect RF input sensitivity?

Yes, the ADF4213BCP operates with VDD1/VDD2 from 2.7 V to 5.5 V. At 5 V supply, RF input sensitivity improves to –5 dBm (min) vs. –10 dBm at 3 V (page 2, "RF/IF CHARACTERISTICS (5 V)"), allowing use with lower-output VCOs or reduced buffer gain - though RF input frequency upper limit decreases slightly to 2.5 GHz.