Analog Devices Inc. HMC142

Overview

HMC142 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC passive double-balanced mixer in a hermetic SMT leadless package, operating as upconverter or downconverter across 7–14 GHz RF/LO and DC–2 GHz IF bands. It delivers +20 dBm input IP3, 35 dB LO-to-RF isolation, and 12 dB typical conversion loss at +15 dBm LO drive - enabling high-dynamic-range signal translation in military radar front-ends.

For engineers reviewing the HMC142 datasheet, HMC142 pinout, HMC142 application, or HMC142 equivalent, key selection criteria include its 7–14 GHz RF/LO bandwidth, DC–2 GHz IF capability, hermetic 25 mm² ceramic-Kovar package, +13 dBm RF/IF input limit, and compatibility with surface-mount RF PCB assembly requiring 50 Ω impedance control and full ground paddle soldering.

Technical Context

The HMC142 implements a passive diode/balun architecture with monolithic GaAs MMIC fabrication, delivering exceptional port-to-port balance and unit-to-unit consistency. Its double-balanced topology suppresses even-order harmonics and provides inherent LO leakage rejection without active bias circuitry.

It operates over –40°C to +85°C with Class 1A ESD sensitivity and requires no DC bias; all ports are AC-coupled except IF, which supports DC-coupled operation under ±2 mA current limits. Thermal resistance is 101.7 °C/W (channel-to-package bottom), with 640 mW max continuous dissipation at 85 °C.

Key Specifications

Pinout & Package

Hermetic SMT leadless package, 25 mm² ceramic body with Kovar lid and gold-plated leads/paddle; dimensions per Hittite outline drawing (0.150" × 0.150" [3.81 mm × 3.81 mm]); all ground leads and paddle must be soldered to PCB RF ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar passive double-balanced mixer applications.

Compared with HMC141LH5 and QPC1005, the HMC142 offers identical RF performance and hermetic packaging without formal screening - making it suitable for high-reliability industrial and aerospace designs where MIL spec is optional but environmental robustness remains essential.

Availability

HMC142 is available at Aetrix Electronics and suitable for radar front-ends, SATCOM terminals, test instrumentation, and electronic warfare systems requiring stable component supply across extended temperature ranges and high RF reliability.

Supply support for HMC142 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 maintains its high-frequency RF portfolio, specializing in microwave ICs for defense, aerospace, and communications infrastructure.

The HMC142 belongs to Hittite's legacy GaAs MMIC mixer family, designed specifically for high-isolation, high-linearity signal translation in demanding RF front-ends where passive architecture and hermetic reliability are critical.

FAQ

What is the recommended LO drive level for optimal performance of the HMC142?

The HMC142 requires a +15 dBm LO drive level to achieve its specified +20 dBm input IP3, 35 dB LO-to-RF isolation, and 12 dB typical conversion loss. Deviating below this level degrades linearity and isolation; exceeding +20 dBm risks parametric shift or reliability impact. All electrical specifications in the datasheet assume +15 dBm LO drive unless otherwise noted, and the HMC142 must be operated within this condition for guaranteed performance.

Can the HMC142 be used for DC-coupled IF operation, and what are the limits?

Yes, the HMC142 IF port (Pin 5) is DC-coupled and supports operation from DC to 2 GHz. However, it must not source or sink more than ±2 mA of DC current - exceeding this limit may cause non-function or permanent die failure. For AC-only IF applications, an external series capacitor should be used to block DC, sized to pass the required IF bandwidth without excessive insertion loss.

Is the HMC142 pin-compatible with the HMC141LH5?

Yes, the HMC142 shares identical pin numbering, pin functions, and mechanical outline with the HMC141LH5 - including GND pins (1,3,4,6,7,9–12), RF (Pin 2), IF (Pin 5), and LO (Pin 8). Both use the same hermetic 3.81 mm × 3.81 mm ceramic-Kovar package. The HMC142 is the non-screened commercial version, while HMC141LH5 adds MIL-PRF-38535 Class B/S qualification.

What is the maximum RF/IF input power rating for the HMC142?

The absolute maximum RF/IF input power rating for the HMC142 is +13 dBm. This limit applies to both RF and IF ports under continuous operation. Exceeding +13 dBm risks irreversible degradation of the GaAs diode junctions, especially under mismatched VSWR conditions. The device achieves its +20 dBm IP3 at +15 dBm LO drive but must remain within the +13 dBm input ceiling to ensure long-term reliability.

Does the HMC142 require external DC bias or active circuitry to operate?

No, the HMC142 is a fully passive double-balanced mixer and requires no external DC bias, current sources, or active support circuitry. Its GaAs MMIC diode/balun structure operates solely on RF, LO, and IF signal energy. Only the IF port has a ±2 mA DC current constraint; all other ports are AC-coupled and self-contained. This eliminates bias network design complexity and thermal drift concerns in the HMC142 implementation.