Analog Devices Inc. HMC8326LG

Overview

HMC8326LG from Analog Devices is a fully integrated E-band in-phase/quadrature (I/Q) downconverter SiP operating at 71–76 GHz RF input, delivering 12 dB typical conversion gain, 30 dBc image rejection, and 6 dB typical noise figure for high-capacity wireless backhaul receivers.

For engineers reviewing the HMC8326LG datasheet, HMC8326LG pinout, HMC8326LG application, or HMC8326LG equivalent, key selection criteria include WR-12 waveguide RF interface, differential 100 Ω baseband outputs, LO frequency range of 11.5–13 GHz, 1 W DC power dissipation, and integrated 6× LO multiplier architecture.

Technical Context

The HMC8326LG integrates a low-noise amplifier, 6× LO multiplier, and image-rejecting I/Q mixer in a single surface-mount package, enabling direct-conversion receiver architectures without external hybrids for differential IF output or with external 90°/180° hybrids for single-ended operation.

It operates with fixed bias conditions: VDLNA = 3 V, VD_MULT = 1.5 V, VG_MIXER = −1 V, and supports lower-sideband downconversion with RF port return loss ≥14 dB and LO port return loss ≥13 dB across its rated temperature range (−40°C to +85°C).

Key Specifications

Pinout & Package

Package: 34-lead, 13 mm × 11 mm surface-mount System-in-Package (SiP) with integrated WR-12 waveguide RF port and 100 Ω differential baseband output pads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar E-band downconverter applications.

Compared with HMC8326LG, HMC1138ALC offers greater LO flexibility but increases system complexity and noise, while HMC1096LC4 provides similar architecture at lower frequency-neither is pin-compatible nor drop-in, and both require redesign of RF interface and LO generation.

Availability

HMC8326LG is available at Aetrix Electronics and suitable for E-band communication systems, high-capacity wireless backhaul, and millimeter-wave test & measurement applications requiring stable component supply and full traceability.

Supply support for HMC8326LG 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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and RF technologies for precision signal processing.

The HMC8326LG belongs to Analog Devices' millimeter-wave SiP product line, engineered specifically for integrated E-band receiver front-ends where waveguide interfacing, image rejection, and power efficiency are critical design constraints.

FAQ

What is the RF input interface type for the HMC8326LG?

The HMC8326LG uses a WR-12 rectangular waveguide interface for RF input, mechanically aligned to standard E-band waveguide flanges. This eliminates lossy coaxial transitions and ensures repeatable RF coupling above 70 GHz. The waveguide port is integrated directly into the SiP substrate and requires precise mechanical mounting per MIL-STD-348 specifications. No soldered RF connector is used - the HMC8326LG relies on waveguide-to-package coupling for optimal high-frequency performance.

Does the HMC8326LG require external hybrids for I/Q operation?

The HMC8326LG provides native differential I and Q baseband outputs and does not require external hybrids for basic I/Q operation. External 180° and 90° hybrids are needed only when converting to single-ended IF output - for example, to interface with legacy spectrum analyzers or non-differential ADCs. The device's internal architecture preserves I/Q amplitude and phase balance (0.2 dB and 5° typical) without external components when used differentially, as confirmed in the datasheet's measurement conditions [2].

What LO drive level is required for optimal performance of the HMC8326LG?

The HMC8326LG specifies an LO input level range of 0 to 8 dBm at 11.5–13 GHz, with 4 dBm used for all typical electrical specifications including 30 dBc image rejection and 12 dB conversion gain. Operating below 0 dBm degrades conversion gain and increases noise figure; exceeding 8 dBm risks compression or damage to the on-chip 6× multiplier. The LO port presents 50 Ω impedance and ≥13 dB return loss, so proper 50 Ω source matching is essential for consistent HMC8326LG performance.

Can the HMC8326LG be used for upper-sideband downconversion?

No - the HMC8326LG is characterized and optimized for lower-sideband (LSB) downconversion only, as stated in the datasheet footnote [1]: "Measurements performed as downconverter with lower sideband selected." Its internal LO multiplier and mixer topology are configured to suppress upper-sideband energy. Attempting USB operation results in degraded image rejection, increased noise figure, and unpredictable conversion gain. For USB applications, a different part such as the HMC1138ALC with configurable sideband selection must be evaluated.

What are the recommended power supply sequencing requirements for the HMC8326LG?

The HMC8326LG requires strict bias sequencing: VG_MIXER (−1 V) and VG_LNA (−2 to 0 V) must be applied before VDD_LNA (3 V) and VDD_MULT (1.5 V). Violating this order risks latch-up or permanent damage to GaAs-based active devices. Analog Devices recommends using sequenced DC-DC controllers or discrete enable timing circuits. All supplies must be filtered with ≥100 nF ceramic capacitors placed within 2 mm of each supply pin. The HMC8326LG datasheet specifies absolute maximum ratings that assume correct sequencing - improper ramping invalidates warranty and reliability projections.