射频混频器
产品（5)
AD8344ACPZ - 400MHz-1.2GHz Active Mixer | Analog Devices
The AD8344ACPZ is a high-performance, broadband active mixer from Analog Devices, optimized for receiver path down-conversion in demanding RF applications. It operates over an RF input range of 400 MHz to 1.2 GHz, with a typical conversion gain of 4.5 dB at 890 MHz. The device integrates an LO driver with a 50 Ω input impedance and requires a low LO drive level of 0 dBm, simplifying system design and reducing external component count. Housed in a compact 16-lead LFCSP-VQ (3x3 mm) package, the AD8344ACPZ is suitable for space-constrained designs. An active mixer is a nonlinear circuit that translates an RF signal to a lower intermediate frequency (IF) by multiplying it with a local oscillator (LO) signal. Unlike passive mixers, active mixers provide conversion gain, which can eliminate the need for a separate IF amplifier and improve overall receiver sensitivity. The AD8344 belongs to the class of Gilbert-cell mixers, which offer high isolation between ports and good linearity. In the signal chain, the mixer typically follows a low-noise amplifier (LNA) and precedes an IF filter and demodulator, playing a critical role in determining the receiver's dynamic range and noise figure. Key features of the AD8344ACPZ include a broadband RF port spanning 400 MHz to 1.2 GHz, a conversion gain of 4 dB (typical), a noise figure of 11 dB, an input IP3 of +24 dBm, and an input P1dB of +8 dBm. The device operates from a 5V supply and includes external control of mixer bias for low-power operation. The integrated LO driver supports a 50 Ω input impedance, minimizing the need for external matching networks. The device is specified for the -40°C to +85°C industrial temperature range, making it suitable for a wide variety of environments. Technically, the AD8344 is fabricated using a highly integrated SiGe process, which provides excellent high-frequency performance and low noise. The mixer's high input IP3 of +24 dBm ensures good linearity, allowing it to handle strong interferers without significant distortion. The low LO drive requirement of 0 dBm reduces the burden on the LO synthesizer, saving power and cost. The device also features external bias control, enabling the designer to trade off power consumption against performance, which is particularly useful in battery-powered or power-sensitive applications. Typical applications for the AD8344ACPZ include cellular base stations, ISM band receivers, point-to-point radios, and other wireless infrastructure where high linearity and wide bandwidth are essential. Its broadband RF port makes it versatile for multi-band or software-defined radio designs. The mixer's high IP3 and low noise figure ensure that it can handle strong signals while maintaining sensitivity, making it ideal for receiver front-ends in demanding environments. When designing with the AD8344ACPZ, it is important to provide proper decoupling on the power supply pins and to follow the recommended layout in the datasheet to minimize parasitic inductance and ensure stable operation. The LO drive level should be kept near 0 dBm to achieve optimal performance, and the bias control pin can be used to adjust the operating point for power versus linearity trade-offs.
AD8344ACPZ-RL7 - 400MHz-1.2GHz Active Mixer | Analog Devices
The AD8344ACPZ-RL7 is a high-performance, broadband active mixer from Analog Devices, designed for demanding receive-channel applications that require wide bandwidth on all ports and very low intermodulation distortion and noise figure. It operates over an RF input frequency range of 400 MHz to 1.2 GHz, with a typical conversion gain of 4.5 dB at 890 MHz. The device is housed in a compact 16-lead LFCSP-VQ (3x3 mm) package, making it suitable for space-constrained designs. An active mixer is a nonlinear device that translates an RF signal to a lower intermediate frequency (IF) by multiplying it with a local oscillator (LO) signal. Unlike passive mixers, active mixers provide conversion gain, which can eliminate the need for a separate IF amplifier in some receiver architectures. The AD8344 integrates an LO driver that supports a 50 Ω input impedance with a low LO drive level, simplifying the interface to frequency synthesizers and reducing external component count. Key features of the AD8344 include a typical conversion gain of 4.5 dB at 890 MHz, a low noise figure, and high linearity, which are critical for maintaining signal integrity in cellular and ISM band receivers. The integrated LO driver minimizes the required LO power, reducing overall system power consumption. The device operates from a single 5 V supply, and its wide bandwidth on all ports allows flexible frequency planning. Technically, the AD8344 uses a Gilbert cell multiplier architecture, which provides excellent port-to-port isolation and suppresses LO-to-RF and LO-to-IF leakage. The mixer's balanced design also reduces even-order distortion products, improving spurious performance. The device is specified over the industrial temperature range of -40°C to +85°C, ensuring reliable operation in harsh environments. Typical applications include cellular base station receivers, ISM band transceivers, and other wireless communication systems where high dynamic range and low noise are essential. The AD8344's small package and low external component count make it ideal for compact radio designs. When designing with the AD8344, ensure proper decoupling of the supply pins and careful layout of the RF, LO, and IF ports to minimize parasitic coupling. The device's datasheet provides detailed application circuits and layout guidelines to achieve optimal performance.
HMC329A-DIE - 22-38 GHz GaAs MMIC Double Balanced Mixer | Analog Devices
The HMC329A-DIE is a general-purpose, double-balanced MMIC mixer from Analog Devices, designed for upconversion and downconversion in the 22 GHz to 38 GHz frequency range. This bare die version offers a compact chip area of 0.87 mm × 0.58 mm, making it ideal for space-constrained, high-frequency applications. The device is fabricated in GaAs technology, providing excellent isolation and linearity performance. A double-balanced mixer is a type of frequency mixer that uses two balanced diode or transistor pairs to suppress both the local oscillator (LO) and radio frequency (RF) ports from the intermediate frequency (IF) output. This architecture inherently provides high isolation between ports, reducing the need for external filtering and improving overall system performance. In the hierarchy of RF components, a mixer is a fundamental building block in transceivers, following the low-noise amplifier (LNA) in the receive chain and preceding the power amplifier (PA) in the transmit chain. Key features of the HMC329A-DIE include a wide RF/LO frequency range of 22 GHz to 38 GHz, an IF frequency range of DC to 8 GHz, and a conversion loss of typically 8 dB. The device offers excellent isolations, with LO-to-RF isolation of 35 dB and LO-to-IF isolation of 25 dB, minimizing signal leakage and spurious responses. The input third-order intercept point (IIP3) is typically 15 dBm, ensuring good linearity for demanding modulation schemes. Technically, the HMC329A-DIE is a passive mixer, meaning it does not require DC bias, which simplifies circuit design and reduces power consumption. The GaAs MMIC process ensures consistent performance across temperature and lot variations. The bare die format allows for direct integration into hybrid circuits or multi-chip modules, offering flexibility in packaging and assembly. Typical applications include point-to-point and point-to-multipoint radios, satellite communications, radar systems, and test and measurement equipment. The wide frequency range and high isolation make it suitable for both military and commercial systems operating in the Ka-band. When designing with this bare die, careful attention must be paid to wire bonding and die attach processes to ensure reliable electrical and thermal connections. The die should be handled in a cleanroom environment to prevent contamination, and proper ESD precautions are essential.
HMC558ALC3BTR - 5.5-14GHz GaAs MMIC Mixer | Analog Devices
The Analog Devices HMC558ALC3BTR is a general-purpose GaAs MMIC double-balanced mixer supplied in a leadless, RoHS-compliant 12-pin CLCC (2.9 x 2.9 mm) ceramic surface-mount package, designed for use as an upconverter or downconverter between 5.5 GHz and 14.0 GHz. Per the Analog Devices datasheet HMC558A, the device exhibits a typical conversion loss of 7.5 dB across the 5.5-14 GHz RF band, with LO drive rated at +15 dBm and IF typically tested at 100 MHz in upper-sideband mode. A double-balanced passive mixer is a frequency-translation building block used in superheterodyne transceivers; it multiplies the radio-frequency (RF) input with a local-oscillator (LO) signal to produce sum and difference intermediate-frequency (IF) outputs, suppressing both the RF and LO leakage at the IF port. Passive Schottky-diode or FET-ring implementations like the HMC558A require no DC bias, which simplifies board-level power architecture but also means they have an inherent insertion loss rather than a conversion gain. Mixers sit beneath the broader RF front-end taxonomy of up/down converters and are essential in any architecture that requires frequency translation. Key specifications include a broadband RF/LO range from 5.5 GHz to 14 GHz, low conversion loss, and high LO-to-RF and LO-to-IF isolation that is characteristic of the double-balanced topology. The leadless CLCC package eliminates bond wires, improving high-frequency repeatability versus chip-on-board implementations of the bare HMC558 die, and supports high-volume reflow-compatible assembly. The mixer operates from a single supply-free passive configuration, simplifying integration. The HMC558A chip is fabricated in a GaAs metal-semiconductor field-effect transistor (MESFET) process, leveraging the high electron mobility and low parasitic capacitance of GaAs to achieve low conversion loss and good port-to-port isolation across an octave-spanning band. Internal baluns transform the differential mixer cell to 50-ohm single-ended RF, LO, and IF interfaces, removing the need for external hybrid couplers. Typical applications include microwave point-to-point and point-to-multipoint radio links, military radar and electronic-warfare receivers and exciters, space and satellite communications payloads, and general-purpose test-and-measurement up/down conversion. When designing with this part, observe the maximum LO drive rating published in the datasheet and ensure the LO source can deliver +15 dBm with adequate harmonic filtering; for evaluation, the device can be ordered in eval-board-ready tape-and-reel packaging (suffix TR) that mates with standard 50-ohm microstrip interfaces.
HMC558ALC3BTR-R5 - 5.5-14 GHz GaAs MMIC Double-Balanced Mixer | Analog Devices
The Analog Devices HMC558ALC3BTR-R5 is a general-purpose, double-balanced GaAs MMIC fundamental mixer housed in a 12-lead leadless RoHS-compliant SMT package (2.9 x 2.9 mm CLCC-style LCC-12, exposed pad). Operating as either an upconverter or downconverter, the device covers the 5.5 GHz to 14 GHz RF band and requires no external components or matching circuitry, enabling compact transceiver front-end layouts. The -R5 suffix denotes the 500-piece reel packaging variant of the HMC558ALC3BTR family. A double-balanced mixer is a passive or active frequency-conversion stage that multiplies a radio-frequency (RF) input by a local oscillator (LO) signal to produce sum and difference intermediate-frequency (IF) products while suppressing certain spurious responses. In the receiver chain hierarchy, a mixer sits between the low-noise amplifier and the IF/baseband stage, while in the transmitter chain it sits between the baseband modulator and the power amplifier. Double-balanced topologies employ two transformers or baluns to provide inherent LO-to-RF and LO-to-IF port isolation, which is critical for dense multi-converter designs where LO leakage would otherwise leak into adjacent channels. Key features of the HMC558A include wide RF/LO bandwidth (5.5 GHz to 14 GHz), typical input IP3 of +17 dBm, typical LO-to-RF isolation of 35 dB, and a passive GaAs MESFET Schottky-diode topology that needs no DC bias. The leadless ceramic SMT package is compatible with standard reflow profiles and offers repeatable performance up to 14 GHz, an advantage over chip-on-board solutions for production volumes. Architecturally, the HMC558A is fabricated in a GaAs metal-semiconductor field-effect transistor (MESFET) Schottky-barrier diode process, an Analog Devices Hittite Microwave heritage technology chosen for low conversion loss and high linearity at microwave frequencies. The double-balanced diode quad, driven by an on-chip balun, provides symmetrical port isolation without external hybrids. Typical applications include 5.5-14 GHz point-to-point and point-to-multipoint radios, C-band and Ku-band downlinks, microwave backhaul upconverters, electronic warfare (EW) receiver front ends, and radar IF strips. The wide bandwidth also covers unlicensed 5 GHz ISM and U-NII bands plus portions of the 6 GHz and 7 GHz microwave links. When designing with this mixer, ensure the LO drive level meets the +13 dBm typical recommended input so that conversion loss and port-to-port isolation stay within datasheet limits. Use low-loss PCB substrates (e.g., Rogers RO4003C) above 10 GHz and keep the LO trace short to suppress feedthrough. This page synthesizes the manufacturer datasheet, distributor inventory (Mouser, DigiKey), reel/packaging variant guidance, and drop-in alternative analysis not consolidated in the original datasheet, giving engineers a single AEO-optimized source for selection, sourcing, and PCB redesign decisions.