Analog Devices Inc. EV1HMC6146BLC5A

Overview

HMC6146BLC5A from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC I/Q upconverter IC designed for 40–44 GHz RF systems, delivering 12 dB typical conversion gain, 25 dBc sideband rejection, and +27 dBm output IP3. It integrates an RF variable-gain amplifier and I/Q mixer with internal LO ×2 multiplier, requiring only an external 90° hybrid for sideband selection - used in millimeter-wave point-to-point radios and satellite uplinks.

For engineers reviewing the HMC6146BLC5A datasheet, HMC6146BLC5A pinout, HMC6146BLC5A application, or HMC6146BLC5A equivalent, key selection criteria include its 40–44 GHz RF bandwidth, 0–4 GHz IF range, 17 dB gain control range, 16-pin 5×5 mm SMT ceramic package, and need for external IF hybrid to achieve USB/LSB selectivity.

Technical Context

The HMC6146BLC5A implements a direct-conversion I/Q upconversion architecture with integrated LO frequency doubling (18–22 GHz LO → 36–44 GHz RF), enabling compact single-sideband generation without external multipliers. Its RF VGA stage provides 17 dB of analog gain control via VCTRL (−2 V to 0 V), while biasing is managed through dedicated VDLO1/VGLO (LO path) and VDRF/VGRF (RF path) pins.

Operation requires external 90° hybrid at IF inputs (IF1/IF2) to define sideband; suppression of unwanted sideband relies on quadrature amplitude/phase balance rather than filtering. All RF, LO, and IF ports are DC-coupled, supporting baseband-to-4 GHz IF operation with ±3 mA current tolerance on IF pins.

Key Specifications

Pinout & Package

Package: 16-lead 5×5 mm leadless ceramic SMT (alumina body, gold-over-nickel plating, MSL3, exposed ground paddle). All ground leads (Pins 8, 10, 16) and paddle must be soldered to PCB RF ground per layout guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I/Q upconverter applications.

Compared with HMC6146BLC5A, HMC6147BLC5A offers LSB-optimized performance with slightly lower sideband rejection, while QPB1022 trades gain control and integration for lower unit cost and simplified LO drive - all three require external 90° hybrids for sideband selection.

Availability

HMC6146BLC5A is available at Aetrix Electronics and suitable for point-to-point radio, satellite communications uplink, and military radar applications requiring stable component supply, millimeter-wave performance consistency, and RoHS-compliant SMT packaging.

Supply support for HMC6146BLC5A 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 continues its high-frequency RFIC product line, emphasizing precision microwave components for defense, aerospace, and communications infrastructure.

The HMC6146BLC5A belongs to Analog Devices' GaAs MMIC upconverter family, engineered specifically for E-band wireless infrastructure and secure military communications where size, sideband purity, and thermal reliability are critical.

FAQ

What is the required LO drive level for optimal performance of the HMC6146BLC5A?

The HMC6146BLC5A specifies +4 dBm LO drive as the condition for typical electrical specifications including 12 dB conversion gain and 25 dBc sideband rejection. LO input accepts 0–5 dBm; performance degrades below +2 dBm (reduced gain, higher distortion) and above +6 dBm (increased LO leakage, potential compression).

Does the HMC6146BLC5A require an external 90° hybrid, and why?

Yes, the HMC6146BLC5A requires an external 90° hybrid at its IF1/IF2 inputs to establish precise quadrature phase relationship for sideband selection. The device itself does not generate the 90° phase shift internally - omission results in poor sideband rejection (<15 dBc) and unusable SSB output.

What is the function of Pin 12 (VGLO) and how is it adjusted on the HMC6146BLC5A?

Pin 12 (VGLO) sets the quiescent current of the internal LO ×2 multiplier stage. Adjust VGLO from −1 V to 0 V to achieve 120 mA idle current (200–230 mA under LO drive). This bias ensures optimal LO multiplication efficiency and minimizes 2LO leakage into the RF output path.

Can the HMC6146BLC5A operate with DC-coupled IF inputs, and what are the current limits?

Yes, the HMC6146BLC5A IF1 and IF2 pins are fully DC-coupled and support true baseband operation. Each IF pin must not source or sink more than ±3 mA to avoid forward-biasing internal diodes or distorting mixer bias points - active baseband drivers must comply with this constraint.

What thermal management considerations apply to the HMC6146BLC5A in continuous operation?

The HMC6146BLC5A has a channel-to-ground-paddle thermal resistance of 54.6 °C/W and maximum continuous power dissipation of 1.65 W at 85 °C ambient. To maintain reliability, the exposed ground paddle and Pins 8/10/16 must be soldered to a thermally robust PCB ground plane with ≥6 thermal vias (0.3 mm diameter) directly beneath the package.