Analog Devices Inc. HMC774ALC3BTR

Overview

HMC774ALC3BTR from Analog Devices is a passive, double-balanced MMIC mixer operating from 7 GHz to 34 GHz, usable as both upconverter and downconverter with no DC bias required. It delivers 15 dB typical conversion loss, 20 dBm input IP3 (downconverter), 30 dB LO-to-RF isolation, and supports DC–8 GHz IF bandwidth - enabling high-frequency point-to-point radio transceivers.

For engineers reviewing the HMC774ALC3BTR datasheet, HMC774ALC3BTR pinout, HMC774ALC3BTR application, or HMC774ALC3BTR equivalent, key selection criteria include RF/LO frequency coverage (7–34 GHz), passive operation (no bias circuitry), wide IF bandwidth (DC–8 GHz), thermal performance (θJA = 120°C/W), and surface-mount LCC package compatibility with RF PCB layout best practices.

Technical Context

The HMC774ALC3BTR employs optimized balun structures to achieve high LO-to-RF (30 dB typ.) and LO-to-IF (23 dB typ.) isolation, minimizing signal leakage in dense RF front-ends. Its passive architecture eliminates DC bias networks and enables seamless integration into broadband microwave systems requiring minimal external matching.

It operates across two overlapping RF bands: 7–20 GHz and 20–34 GHz, with consistent performance across temperature (−40°C to +85°C) and LO drive levels (11–17 dBm). The device supports both upper and lower sideband operation in up/downconversion modes, with verified SSB noise figure of 12 dB and input P1dB of 12–13 dBm.

Key Specifications

Pinout & Package

12-terminal leadless ceramic chip carrier (LCC) with 2.90 mm × 2.90 mm footprint and exposed thermal pad. All GND pins (1, 3, 4, 6, 7, 9, 10, 12) and EPAD must be soldered to RF/dc ground plane; NIC pin (11) is unconnected and may be grounded without performance impact.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC1048LC3B and QPC1006, the HMC774ALC3BTR offers superior passive simplicity and broader 7–34 GHz coverage, making it optimal for Ka-band VSAT and test equipment where bias-free operation and wide IF bandwidth are prioritized over gain.

Availability

HMC774ALC3BTR is available at Aetrix Electronics and suitable for point-to-point radios, VSAT terminals, and military communications systems requiring stable component supply across extended temperature ranges and high-frequency performance consistency.

Supply support for HMC774ALC3BTR 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 RF ICs, serving aerospace, defense, communications, and instrumentation markets with precision signal processing solutions.

The HMC774ALC3BTR belongs to Analog Devices' Hittite Microwave MMIC product line, engineered specifically for broadband microwave and millimeter-wave systems demanding high linearity, wide bandwidth, and robust thermal performance in compact surface-mount packages.

FAQ

What is the recommended LO drive level for optimal performance of the HMC774ALC3BTR?

The HMC774ALC3BTR achieves best conversion loss and linearity at +15 dBm LO drive, with acceptable operation from +11 dBm to +17 dBm. Deviating below +11 dBm increases conversion loss; exceeding +17 dBm risks permanent damage per absolute maximum ratings. The HMC774ALC3BTR datasheet specifies +15 dBm as the nominal condition for all typical performance curves including IP3 and P1dB.

Does the HMC774ALC3BTR require external DC blocking capacitors on its ports?

No - the HMC774ALC3BTR has fully dc-coupled LO and RF ports, eliminating need for external DC blocking. The IF port supports dc-coupled operation but must not source/sink more than ±3 mA; for AC-coupled IF use, a series capacitor sized for the lowest IF frequency (e.g., 100 pF for 1 GHz) is recommended. The HMC774ALC3BTR's passive architecture inherently avoids internal bias dependencies.

Can the HMC774ALC3BTR be used for both upconversion and downconversion?

Yes - the HMC774ALC3BTR is bidirectional and validated for both upconversion and downconversion across its full 7–34 GHz RF range. Performance data in the datasheet includes separate tables and plots for both modes, covering IF frequencies from DC to 8 GHz and sideband configurations (USB/LSB). The HMC774ALC3BTR requires no hardware modification or pin reconfiguration to switch between modes.

What is the thermal resistance (θJA) of the HMC774ALC3BTR, and how does PCB layout affect it?

The HMC774ALC3BTR has θJA = 120°C/W when mounted on a standard JEDEC test board (JESD51-2) with 3×3 thermal vias. Actual θJA depends heavily on PCB copper area, via count, and layer stack-up; increasing ground plane copper and adding ≥9 thermal vias under the exposed pad can reduce θJA by 20–30%. The HMC774ALC3BTR's maximum junction temperature is 165°C, so thermal design directly impacts continuous RF power handling.

Is the HMC774ALC3BTR pin-compatible with other Hittite mixer variants like the HMC774ALC3?

Yes - the HMC774ALC3BTR is the tape-and-reel packaging variant of the HMC774ALC3, sharing identical pinout, footprint, electrical specifications, and thermal characteristics. The "BTR" suffix denotes bulk tape-and-reel packaging (300 pcs/reel); no functional or mechanical differences exist between HMC774ALC3 and HMC774ALC3BTR. Design files and layout footprints for HMC774ALC3 apply directly to HMC774ALC3BTR.