Analog Devices Inc. HMC832LP6GETR

Overview

HMC832LP6GETR from Analog Devices is a 3.3 V fractional-N phase-locked loop (PLL) with integrated VCO, generating continuous RF output from 25 MHz to 3000 MHz. It features 100 MHz maximum phase detector rate, −110 dBc/Hz in-band phase noise (typ), 24-bit frequency resolution (~3 Hz step), and exact-frequency mode with 0 Hz error-enabling spurious-free local oscillator synthesis in microwave radio transceivers.

For engineers reviewing the HMC832LP6GETR datasheet, HMC832LP6GETR pinout, HMC832LP6GETR application, or HMC832LP6GETR equivalent, key selection criteria include wideband VCO coverage (1500–3000 MHz fundamental), programmable performance modes (low-current vs. high-performance), differential/single-ended RF outputs, SPI-controlled mute and gain functions, and compatibility with tunable reference sources for CATV and cellular infrastructure designs.

Technical Context

The HMC832LP6GETR integrates a delta-sigma modulator and phase detector operating up to 100 MHz, enabling wide loop bandwidths and fast frequency hopping. Its VCO subsystem supports fundamental frequencies from 1500 MHz to 3000 MHz, with an on-chip divider chain (÷1, ÷2, ÷4, ..., ÷62) to achieve the full 25–3000 MHz output range.

Programmable performance technology allows dynamic selection between low-current mode (e.g., 195 mA at 2500 MHz, gain 6) and high-performance mode (226 mA at same condition), adjusting current consumption and noise floor trade-offs. The device supports exact-frequency mode via Δ-Σ configuration to eliminate residual fractional spur-induced frequency error.

Key Specifications

Pinout & Package

40-lead 6 mm × 6 mm SMT package (36 mm² footprint), thermally enhanced with exposed ground pad (EP). Pin layout optimized for RF isolation and low-noise analog routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fractional-N PLL with integrated VCO applications.

Compared with HMC832LP6GETR, HMC830LP6GETR offers legacy compatibility but sacrifices 5 dB in-phase noise and 2× PFD speed, while ADF4351BCPZ trades precision for broader coverage and lacks 0 Hz error correction-making HMC832LP6GETR optimal for high-fidelity, regulation-compliant RF systems.

Availability

HMC832LP6GETR is available at Aetrix Electronics and suitable for cellular infrastructure, microwave radio, and CATV equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for HMC832LP6GETR 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 digital signal processing semiconductors, serving communications, industrial, automotive, and aerospace markets with precision timing and RF solutions.

The HMC832LP6GETR belongs to Analog Devices' high-frequency PLL/VCO product line, designed specifically for spurious-sensitive wireless infrastructure and test equipment requiring ultralow phase noise, wideband agility, and deterministic frequency accuracy.

FAQ

What is the maximum phase detector frequency supported by the HMC832LP6GETR?

The HMC832LP6GETR supports a maximum phase detector frequency of 100 MHz in both fractional and integer modes. This capability enables wide loop bandwidths for fast frequency settling and improved transient response. The 100 MHz limit is achievable when respecting minimum N-divider values-for example, in fractional mode, the maximum PD frequency equals fVCO/20 or 100 MHz, whichever is less. This specification is confirmed in the datasheet's Timing Specifications table and General Description section. The HMC832LP6GETR leverages this high PFD rate to reduce lock time in microwave radio and cellular infrastructure applications.

Does the HMC832LP6GETR support exact-frequency mode, and how does it benefit system design?

Yes, the HMC832LP6GETR supports exact-frequency mode via its delta-sigma modulator, enabling output frequencies with 0 Hz residual error. This eliminates fractional spurs that degrade EVM and spectral purity in zero-IF and direct-conversion transceivers. The feature is implemented through dedicated register configuration (Exact Frequency Mode Register) and verified in datasheet Figures 9–14 showing suppressed spurs at 904 MHz, 2118 MHz, and 2647 MHz. For systems requiring strict channel alignment-such as LTE carrier aggregation or WiMax DFS-the HMC832LP6GETR's exact-frequency mode ensures compliance without post-synthesis calibration. This capability is intrinsic to the HMC832LP6GETR and not present in earlier variants like HMC830LP6GETR.

What are the power supply requirements for the HMC832LP6GETR, and how are the multiple supply pins used?

The HMC832LP6GETR requires ten dedicated 3.3 V supply pins: AVDD, DVDD, VPPCP, VCC1, VCC2, RVDD, VCCHF, VCCPS, VCCPD, and VDDLS-all specified from 3.1 V to 3.5 V over −40°C to +85°C. These pins isolate analog, digital, VCO core, charge pump, reference, and prescaler circuitry to minimize supply-induced noise coupling. For example, VPPCP powers only the charge pump analog section, while VCC1/VCC2 serve the VCO analog core. Proper decoupling per datasheet guidelines (e.g., 100 nF + 10 pF near each pin) is essential to achieve −110 dBc/Hz phase noise. This multi-rail architecture is a defining characteristic of the HMC832LP6GETR and differs from simpler single-supply PLLs.

How does the programmable performance technology in the HMC832LP6GETR affect current consumption and phase noise?

The HMC832LP6GETR's programmable performance technology allows selection between low-current mode (e.g., 195 mA at 2500 MHz, gain 6) and high-performance mode (226 mA at same condition), trading current draw for phase noise floor. In high-performance mode, the device achieves −110 dBc/Hz in-band phase noise and −226 dBc/Hz fractional FOM; in low-current mode, phase noise degrades by ~1–2 dB but current drops ~10–15%. This adjustment is controlled via VCO_REG[1:0] bits and is validated in datasheet Figures 3–5 and Table 1. The HMC832LP6GETR thus enables application-specific optimization-e.g., battery-powered test gear may select low-current mode, while base station LOs prioritize noise performance.

What RF output configurations does the HMC832LP6GETR support, and how is output power controlled?

The HMC832LP6GETR supports both differential (RF_P/RF_N) and single-ended RF outputs, with programmable return loss profiles and 12 dB of gain control in 1 dB steps (gain settings 0–11). Differential output delivers 2 dBm typical at 2000 MHz (gain 6); single-ended output provides 7 dBm (gain 11). Gain is set via VCO_REG[3:0], and output type is selected using VCO_REG[3:2]. The HMC832LP6GETR also includes automatic mute during unlock events and supports external 50 Ω termination. These capabilities are detailed in the RF Output Characteristics table and Applications Information section, confirming the HMC832LP6GETR's flexibility across mixer, PA driver, and spectrum analyzer front-end use cases.