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HMC564LC4TR

ADI GaAs pHEMT LNA, 6~20GHz, 22dB gain, 2.5dB NF, +14dBm P1dB, QFN-24

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Manufacturer Part：

HMC564LC4TR

Package：

QFN-24 (4mm x 4mm x 1.42mm, air-cavity LCP lid)

Brand：

Product Categories：

Analog Linear ICs, Integrated Circuits ICs

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Description

Product Overview

The HMC564LC4TR from Analog Devices/Hittite is a wideband GaAs pHEMT MMIC low-noise amplifier covering 6GHz to 20GHz. With 22dB typical gain, 2.5dB noise figure, and +14dBm output P1dB in a 4mm x 4mm QFN-24 package, it provides high dynamic range LNA performance for microwave radio, VSAT, radar, and electronic warfare applications.

Key Specifications

Frequency Range	6GHz ~ 20GHz
Small-Signal Gain	22dB typical (mid-band)
Noise Figure	2.5dB typical (mid-band)
Output P1dB	+14dBm
Output IP3	+26dBm
Input Return Loss	15dB typical
Output Return Loss	12dB typical
Supply Voltage	+5V
Supply Current	80mA typical
Operating Temperature	-40C ~ +85C

Features

Ultra-wideband 6GHz to 20GHz coverage in a single device
Low 2.5dB noise figure for sensitive receiver front-ends
High +26dBm OIP3 for excellent linear dynamic range
+14dBm P1dB output power for driving subsequent stages
On-chip RF I/O matching to 50 ohm simplifies PCB design

Applications

Microwave point-to-point radio receivers
VSAT terminal LNB and transceiver
Radar receiver front-ends
Electronic warfare and SIGINT receivers
Test equipment low-noise amplification

Product Introduction:HMC564LC4TR Product Introduction

The HMC564LC4TR from Analog Devices (formerly Hittite Microwave) is a wideband GaAs pHEMT MMIC low-noise amplifier operating from 6GHz to 20GHz. The device delivers 22dB of typical small-signal gain with a 2.5dB noise figure in the mid-band, providing the sensitivity and dynamic range required for microwave receiver front-ends. The output P1dB of +14dBm and output IP3 of +26dBm ensure that the amplifier can handle strong interferers without generating excessive distortion, critical for co-site and jamming environments. The RF input and output are internally matched to 50 ohms, requiring only external DC blocking capacitors and bias inductors for operation. The amplifier is powered from a single +5V supply drawing 80mA typical, with gate bias pins (VG, VG2) for adjusting the drain current and optimizing the noise figure versus linearity trade-off. The QFN-24 air-cavity package with LCP lid provides excellent RF performance and thermal characteristics.

Working Principle:HMC564LC4TR Working Principle

The HMC564LC4TR uses a two-stage GaAs pHEMT amplifier topology. The first stage is optimized for low noise figure with a high-quality input match network that presents the optimal source impedance (Gamma-opt) to the gate of the first pHEMT device. The second stage is optimized for gain and linearity, providing the majority of the output power capability. Both stages share the +5V drain supply, with separate gate bias pins (VG for stage 1, VG2 for stage 2) that allow independent adjustment of the quiescent drain current. The gate bias voltages are typically set using resistive voltage dividers or active bias controllers. RF chokes on the drain bias lines isolate the RF signal from the power supply, while DC blocking capacitors on the RF input and output prevent the bias voltages from appearing on the external RF ports. The on-chip matching networks transform the device impedances to 50 ohms, eliminating the need for external matching components.

Pin Description:HMC564LC4TR Pin Definition and Functions

Pad	Name	Function
5	RF IN	RF Input (50-ohm matched)
11	VG	Stage 1 Gate Bias
16	RF OUT / VD	RF Output / Drain Bias (DC fed through)
21	VD2	Stage 2 Drain Bias
23	VG2	Stage 2 Gate Bias
1,2,4,6,7,12,13,15,17,19,24,25	GND	Ground
3,8,9,10,14,20,22	N/C	No Connect

Application Scenarios:In which products and applications isHMC564LC4TR used

Microwave radio: Serve as the first LNA in 7GHz, 11GHz, 13GHz, 15GHz, or 18GHz point-to-point radio receivers with 2.5dB NF
VSAT terminals: Amplify the downconverted satellite signal in Ku-band (12~18GHz) VSAT LNB modules with 22dB gain
Radar receivers: Provide low-noise amplification in X-band (8~12GHz) and Ku-band (12~18GHz) radar receiver front-ends
Electronic warfare: Detect and amplify weak threat signals in SIGINT and RWR systems from 6~20GHz with high dynamic range
Test equipment: Boost signal levels in microwave test setups and spectrum analyzer front-ends with minimal added noise

Alternative Models:What chips are recommended as replacements for HMC564LC4TR

Model	Brand	Freq Range	NF	Gain
HMC519LC4	ADI	6~26GHz	3.5dB	14dB
HMC7511LC4	ADI	6~18GHz	2.2dB	20dB
MAAL-011129	MACOM	6~18GHz	2.0dB	22dB
CHA3093-99F	United Monolithic	6~18GHz	2.5dB	20dB
TGA2570-SM	Qorvo	6~18GHz	2.5dB	18dB