RF Mixers
Products (3)
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.