Analog Devices Inc. 131656-HMC977LP4E

Overview

131656-HMC977LP4E from Analog Devices is a GaAs MMIC I/Q downconverter IC operating from 20 GHz to 28 GHz, delivering 14 dB typical conversion gain, 21 dBc image rejection (20–26.5 GHz), and 2.5 dB noise figure. It integrates an LNA, active 2× LO multiplier, and image-reject mixer in a single 4 mm × 4 mm LFCSP package, enabling compact point-to-point radio and EW receiver front-ends.

For engineers reviewing the 131656-HMC977LP4E datasheet, 131656-HMC977LP4E pinout, 131656-HMC977LP4E application, or 131656-HMC977LP4E equivalent, key selection criteria include RF/LO frequency coverage (20–28 GHz / 8.3–15.7 GHz), IF bandwidth (DC–3.5 GHz), supply current (170–210 mA), and external 90° hybrid requirement for sideband selection.

Technical Context

The 131656-HMC977LP4E implements a monolithic GaAs architecture with integrated low-noise amplifier followed by an image-reject mixer driven by an on-die 2× LO multiplier. Its design eliminates the need for post-LNA image filtering by rejecting thermal noise at the image frequency.

It requires an external 90° hybrid coupler at the IF ports to select upper or lower sideband; IF1 and IF2 outputs are dc-coupled and must be biased to 0 V common-mode voltage. The device operates across −40°C to +85°C with no power sequencing required and supports LO drive from 2 dBm to 6 dBm.

Key Specifications

Pinout & Package

131656-HMC977LP4E uses a 24-lead, 4 mm × 4 mm leadless RoHS-compliant LFCSP (HCP-24-2) with exposed thermal pad requiring solder connection to ground plane. Pin 1 is marked by chamfered corner; EPAD must be grounded for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC1040LP4ME and ADMV1013ACPZ, the 131656-HMC977LP4E offers the lowest noise figure and smallest package in its 20–28 GHz class, making it optimal for size- and sensitivity-constrained EW and satellite platforms where external LO sources are available.

Availability

131656-HMC977LP4E is available at Aetrix Electronics and suitable for point-to-point radios, military electronic warfare systems, and satellite communications equipment requiring stable component supply across extended temperature ranges and high-frequency performance.

Supply support for 131656-HMC977LP4E 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 precision instrumentation, communications, and defense markets with industry-leading microwave components.

The HMC977 product line delivers monolithic GaAs I/Q downconverters for Ka-band systems, designed specifically to replace hybrid image-reject assemblies with surface-mount reliability and repeatable RF performance.

FAQ

What is the function of the 131656-HMC977LP4E in a receiver chain?

The 131656-HMC977LP4E serves as an integrated I/Q downconverter that translates RF signals from 20–28 GHz to baseband I/Q outputs. It combines an LNA, 2× LO multiplier, and image-reject mixer in one die, eliminating discrete filtering and enabling compact, high-performance Ka-band receiver designs. Its dc-coupled IF ports support direct connection to ADCs or baseband processors.

Does the 131656-HMC977LP4E require an external 90° hybrid coupler?

Yes, the 131656-HMC977LP4E requires an external 90° hybrid coupler at its IF1 and IF2 ports to combine quadrature outputs and select upper or lower sideband. Without it, the device functions as a standard double-balanced mixer with separate I and Q outputs. Sideband selection is determined by port assignment: IF1 to 0° and IF2 to 90° selects upper sideband; reversed connection selects lower sideband.

What are the absolute maximum ratings for RF input power and LO drive on the 131656-HMC977LP4E?

The 131656-HMC977LP4E has an absolute maximum RF input power of 2 dBm and LO drive of 10 dBm. Exceeding these limits risks permanent damage. Operational LO drive is specified from 2–6 dBm; applying 10 dBm may cause compression, distortion, or reliability degradation. RF input should be limited to −8 dBm (P1dB) for linear operation.

How is thermal management implemented for the 131656-HMC977LP4E?

Thermal management for the 131656-HMC977LP4E relies on soldering its exposed thermal pad (EPAD) directly to a low-impedance ground plane with ≥4 thermal vias (0.3 mm diameter, 0.1 mm annular ring). The datasheet specifies θJC = 56.3°C/W on a JEDEC 2S2P board. PCB layout must follow Figure 54 land pattern, including mask opening and via placement, to maintain junction temperature ≤175°C at 1.6 W dissipation.

Can the 131656-HMC977LP4E operate with IF frequencies down to DC?

Yes, the 131656-HMC977LP4E supports dc-coupled IF operation on both IF1 and IF2 pins. However, each port must not source or sink more than 3 mA of current to prevent malfunction or failure. For non-DC applications, external series capacitors are required to block dc; capacitor values must be selected to pass the target IF bandwidth (e.g., 100 pF for 1 GHz IF).