Analog Devices Inc. ADF4107BCPZ

Overview

ADF4107BCPZ from Analog Devices is a 7 GHz PLL frequency synthesizer IC used as a local oscillator in RF up/downconversion stages of wireless transceivers. It features dual-modulus prescaling (8/9 to 64/65), programmable charge pump current (625 µA–5 mA), 2.7–3.3 V supply, separate VP pin for extended tuning voltage, and analog/digital lock detect. It enables high-frequency LO generation in LMDS base stations and satellite transceivers.

For engineers reviewing the ADF4107BCPZ datasheet, ADF4107BCPZ pinout, ADF4107BCPZ application, or ADF4107BCPZ equivalent, key selection criteria include RF input bandwidth (1–7 GHz), PFD frequency limit (104 MHz max), charge pump current programmability, antibacklash pulse width control, and compatibility with external loop filters and VCOs in broadband wireless systems.

Technical Context

The ADF4107BCPZ implements a digital phase-frequency detector (PFD) with programmable antibacklash pulse width (1.3 ns, 2.9 ns, or 6.0 ns), precision charge pump with ±ICP output referenced to CPGND, and a 14-bit R counter enabling REFIN division from 20–250 MHz. Its N-divider uses 13-bit B and 6-bit A counters with dual-modulus prescaler (P/P+1) to realize N = BP + A.

It supports 3-wire serial interface (CLK/DATA/LE) with 24-bit shift register, latch-select via control bits C2/C1, and MUXOUT configurable for lock detect, scaled RF, or scaled reference. The separate VP supply (≥AVDD, ≤5.5 V) decouples charge pump headroom from core logic voltage, enabling 5 V tuning range in 3 V systems.

Key Specifications

Pinout & Package

LFCSP package (4 mm × 4 mm, 20-lead, exposed pad). Pin 19 = RSET (sets ICP), Pin 20 = CP (±ICP output to loop filter), Pin 1 = CPGND (dedicated charge pump ground return).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADF4107BCPZ, ADF4153ACPZ offers better phase noise and integration but sacrifices VP flexibility, while HMC703LP4E extends frequency range at the cost of increased design complexity and reduced diagnostic capability.

Availability

ADF4107BCPZ is available at Aetrix Electronics and suitable for LMDS base station transmitters, satellite uplink modulators, and wireless LAN instrumentation requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for ADF4107BCPZ 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 precision instrumentation, communications, and industrial markets since 1965.

The ADF4107BCPZ belongs to Analog Devices' PLL frequency synthesizer product line, designed specifically for high-frequency wireless infrastructure LO generation with emphasis on wide RF bandwidth, flexible charge pump control, and robust lock detection.

FAQ

What is the maximum RF input frequency supported by the ADF4107BCPZ?

The ADF4107BCPZ supports an RF input frequency range of 1.0 GHz to 7.0 GHz, as specified in the Rev. D datasheet under RF CHARACTERISTICS. This 7 GHz bandwidth enables direct synthesis in Ka-band applications without requiring frequency multipliers, reducing system complexity and signal path loss. The ADF4107BCPZ achieves this using a high-speed CML prescaler followed by CMOS A/B counters rated for ≤300 MHz input.

How does the separate VP supply pin improve VCO tuning range in the ADF4107BCPZ?

The VP pin on the ADF4107BCPZ allows the charge pump output stage to operate at up to 5.5 V independently of the 2.7–3.3 V AVDD/DVDD rails. This extends the tuning voltage range delivered to the external VCO-enabling full utilization of VCOs with 0–5 V tuning curves in 3 V systems. Without VP, the tuning range would be limited to ~0–3 V, potentially restricting VCO selection and frequency coverage.

Can the ADF4107BCPZ generate non-integer-N frequencies?

No, the ADF4107BCPZ is an integer-N PLL synthesizer only. It implements N = BP + A using 13-bit B and 6-bit A counters with dual-modulus prescaler, producing output frequencies spaced by fREFIN/R. Fractional-N capability is not present-no sigma-delta modulator, fractional divider, or dithering circuitry exists in the ADF4107BCPZ architecture per the functional block diagram and latch maps in the datasheet.

What are the valid prescaler modulus options for the ADF4107BCPZ?

The ADF4107BCPZ supports four programmable dual-modulus prescaler options: 8/9, 16/17, 32/33, and 64/65. These are selected via bits P1–P2 in the Function Latch (Figure 22, page 11). Each option determines the minimum step size and contiguous frequency coverage achievable for a given RF input-e.g., 64/65 enables finer resolution at high frequencies but requires lower prescaler output (<300 MHz) than 8/9.

Does the ADF4107BCPZ include an integrated VCO?

No, the ADF4107BCPZ does not include an integrated VCO. It is a PLL frequency synthesizer IC that requires an external voltage-controlled oscillator connected to the CP output and loop filter. The device provides the PFD, charge pump, programmable dividers, and interface logic-but relies on an external VCO for RF generation, as explicitly stated in the General Description: "A complete PLL can be implemented if the synthesizer is used with an external loop filter and VCO."