Analog Devices Inc. HMC1032LP6GE

Overview

HMC1032LP6GE from Analog Devices (formerly Hittite Microwave) is a low-noise clock generator IC with integrated fractional-N PLL and VCO, delivering differential output frequencies from 125 MHz to 350 MHz. It achieves 75 fs RMS jitter (typical at 350 MHz), -165 dBc/Hz phase noise floor, and supports up to 100 MHz phase detector rate - enabling high-precision clocking for SERDES, optical transponders, and 10G Ethernet line cards.

For engineers reviewing the HMC1032LP6GE datasheet, HMC1032LP6GE pinout, HMC1032LP6GE application, or HMC1032LP6GE equivalent, this device offers verified Exact Frequency Mode operation, 24-bit frequency resolution (~3 Hz step), built-in digital self-test, and SPI-programmable 2-bit output amplitude control - critical for jitter-sensitive timing systems requiring deterministic frequency synthesis.

Technical Context

The HMC1032LP6GE implements a fractional-N PLL architecture with a Delta-Sigma modulator and integrated RF VCO, supporting both integer and fractional feedback modes. Its charge pump operates at up to 2.54 mA with 20 µA gain step size, and the phase detector accepts reference inputs up to 350 MHz with AC coupling and 5 pF input capacitance.

It features dual supply domains: +5V for VCO core/buffer (VCC2), charge pump (VPPCP/VDDCP), and PLL analog sections; +3.3V for digital logic (DVDD3V), prescaler (VCCPS), phase detector (VCCPD), and RF/PLL buffers (VCCHF/RVDD). The device includes a 40-pin 6×6 mm QFN package with exposed ground paddle and MSL1 rating.

Key Specifications

Pinout & Package

40-lead 6×6 mm QFN package with exposed ground paddle (RoHS-compliant, matte tin plating, MSL1). Thermal resistance junction-to-paddle is 20 °C/W. All ground leads and paddle must be soldered to PCB RF ground per Hittite Application Note land pattern guidance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock generator applications.

Compared with LMK04828BISQE/NOPB and AD9523-1BCPZ, the HMC1032LP6GE delivers superior phase noise floor and finer frequency resolution in a smaller footprint, making it optimal for single-output, high-spectral-purity applications where board space and jitter budget are critical constraints.

Availability

HMC1032LP6GE is available at Aetrix Electronics and suitable for 10G Ethernet line cards, OTN/SONET timing modules, high-speed data converter clocking, and FPGA processor clocking requiring stable component supply and long-term lifecycle assurance.

Supply support for HMC1032LP6GE 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 acquired Hittite Microwave in 2014 and integrates its high-frequency RF and timing products into the broader Precision Clocks and RF portfolio.

The HMC1032LP6GE belongs to Hittite's integrated PLL+VCO clock generator family, designed specifically for telecom infrastructure, optical transport, and high-speed serial interface timing where ultra-low jitter and deterministic frequency synthesis are mandatory.

FAQ

What is the maximum phase detector frequency supported by the HMC1032LP6GE?

The HMC1032LP6GE supports a maximum phase detector frequency of 100 MHz in fractional mode B, 80 MHz in fractional mode A, and 125 MHz in integer mode. This capability allows wide loop bandwidths for fast lock time and effective jitter attenuation. The actual achievable PFD rate depends on N-divider settings - for example, in fractional mode, max PFD = f_VCO/20 or 100 MHz, whichever is lower. This specification is confirmed in the Electrical Specifications table on page 3 of the HMC1032LP6GE datasheet.

Does the HMC1032LP6GE support exact frequency synthesis without fractional spurs?

Yes, the HMC1032LP6GE implements Hittite's Exact Frequency Mode using its Delta-Sigma modulator to achieve near-zero frequency error across its 125–350 MHz output range. This mode enables output frequencies with <1 Hz deviation from target values, eliminating the need for post-fabrication calibration. The 24-bit resolution yields ~3 Hz typical step size, and performance is validated in Figure 4 and Table 1 of the datasheet under fractional mode conditions.

What power supply configurations are required for proper operation of the HMC1032LP6GE?

The HMC1032LP6GE requires two distinct supply domains: +5V for VPPCP, VDDCP, VCC1, and VCC2 (VCO core/buffer); and +3.3V for AVDD, RVDD, DVDD3V, VCCHF, VCCPS, and VCCPD. Each supply must be independently decoupled with 100 nF ceramic + 10 µF tantalum capacitors placed within 2 mm of respective pins. The datasheet specifies absolute max ratings of -0.3V to +5.5V for 5V rails and -0.3V to +3.6V for 3.3V rails, with operating temperature range -40°C to +85°C.

How is the differential output amplitude controlled on the HMC1032LP6GE?

The HMC1032LP6GE provides 2-bit SPI-programmable output amplitude control via Gain Setting bits in Register 0x05. Four settings (00–11) adjust differential swing from 0.33 Vpp to 1.01 Vpp at 350 MHz, as measured into 100 Ω. This feature eliminates external resistive dividers and allows dynamic matching to downstream receiver thresholds. The output mute function is also SPI-controllable, enabling glitch-free clock gating during system reconfiguration.

Is there an evaluation platform available for the HMC1032LP6GE?

Yes, Hittite (now Analog Devices) offers the EKIT01-HMC1032LP6GE evaluation kit, which includes the HMC1032LP6GE Evaluation PCB, USB interface board, 6-foot USB cable, and CD-ROM with user manual, schematic, and PLL design software. The standalone evaluation PCB part number is EVAL01-HMC1032LP6GE. Both are orderable directly from Analog Devices' website or authorized distributors, and the schematic is accessible via www.analog.com search for HMC1032LP6GE.