Overview
The HMC570 is a compact GaAs MMIC (Monolithic Microwave Integrated Circuit) I/Q downconverter chip designed by Analog Devices Inc. This device is optimized for high-performance applications requiring efficient signal conversion and low noise figures. The HMC570 integrates an LNA (Low Noise Amplifier) followed by an image reject mixer, which is driven by an active x2 multiplier. This configuration eliminates the need for a filter following the LNA and effectively removes thermal noise at the image frequency. The chip provides I and Q mixer outputs and requires an external 90° hybrid to select the required sideband.
Key Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 17 - 21 GHz |
| Conversion Gain | 10 dB |
| Noise Figure | 3 dB |
| Image Rejection | 17 dB |
| LO to RF Isolation | 35 dB |
| Input IP3 | +3 dBm |
| Die Size | 2.33 x 2.73 x 0.10 mm |
Key Features
- Compact GaAs MMIC design for high-frequency applications.
- Integrated LNA and image reject mixer for improved signal quality.
- Active x2 multiplier for efficient frequency conversion.
- Provides I and Q mixer outputs with external 90° hybrid requirement.
- Low noise figure of 3 dB and high image rejection of 17 dB.
- High LO to RF isolation of 35 dB.
Applications
- Point-to-Point and Point-to-Multi-Point Radio systems.
- Military Radar, Electronic Warfare (EW), and Electronic Intelligence (ELINT) systems.
- Satellite Communications.
Q & A
- What is the frequency range of the HMC570?
The HMC570 operates within the frequency range of 17 - 21 GHz. - What is the conversion gain of the HMC570?
The HMC570 provides a small signal conversion gain of 10 dB. - What is the noise figure of the HMC570?
The noise figure of the HMC570 is 3 dB. - What is the image rejection of the HMC570?
The HMC570 offers 17 dB of image rejection. - What is the LO to RF isolation of the HMC570?
The LO to RF isolation is 35 dB. - What is the input IP3 of the HMC570?
The input IP3 is +3 dBm. - What are the typical applications of the HMC570?
The HMC570 is ideal for Point-to-Point and Point-to-Multi-Point Radio, Military Radar, EW & ELINT, and Satellite Communications. - Does the HMC570 require any external components for operation?
Yes, an external 90° hybrid is required to select the required sideband. - What is the die size of the HMC570?
The die size of the HMC570 is 2.33 x 2.73 x 0.10 mm. - How is the noise at the image frequency managed in the HMC570?
The image reject mixer in the HMC570 eliminates the need for a filter following the LNA and removes thermal noise at the image frequency.
