Overview
The HMC908ALC5 is a compact, gallium arsenide (GaAs) monolithic microwave integrated circuit (MMIC) designed as an in-phase/quadrature (I/Q) downconverter. It is packaged in a leadless, RoHS compliant ceramic leadless chip carrier. This device is optimized for point-to-point and point-to-multipoint microwave radio applications, operating within the 9 GHz to 12 GHz input RF frequency range. The HMC908ALC5 integrates a low noise amplifier (LNA), an image rejection mixer, and a local oscillator (LO) buffer amplifier, providing a small signal conversion gain of 11 dB and a noise figure of 2.2 dB. It also offers 25 dB of image rejection at 100 MHz.
Key Specifications
| Parameter | Min. | Typ. | Max. | Units |
|---|---|---|---|---|
| Frequency Range, RF | 9 | - | 12 | GHz |
| Frequency Range, LO | 5.5 | - | 15.5 | GHz |
| Frequency Range, IF | DC | - | 3.5 | GHz |
| Conversion Gain (As IRM) | 8 | 11 | - | dB |
| Noise Figure | 2.2 | - | - | dB |
| Image Rejection | 15 | - | 25 | dB |
| LO to RF Isolation | 40 | - | 50 | dB |
| LO to IF Isolation | 5 | - | 10 | dB |
| Input IP3 | -3 | - | 2 | dBm |
| Supply Current (ID1 + ID2) | 60 | - | 88 | mA |
| Supply Current (ID3) | 100 | - | 120 | mA |
Key Features
- Compact Design: The HMC908ALC5 is a compact GaAs MMIC, making it a smaller alternative to hybrid style image rejection mixer downconverter assemblies.
- Low Noise Amplifier (LNA): Self-biased LNA with a bias current of 53 mA at 3 V.
- Image Rejection Mixer: I/Q double balanced mixer with 25 dB of image rejection, eliminating the need for a filter following the LNA.
- Local Oscillator (LO) Buffer Amplifier: Self-biased LO driver amplifier requiring a single DC bias voltage, compatible with wideband synthesizers.
- External 90° Hybrid Requirement: Needed to select the desired sideband of operation.
- RoHS Compliant: Packaged in a leadless ceramic SMT package, compliant with RoHS standards.
Applications
- Point-to-Point and Point-to-Multi-Point Radio: Ideal for microwave radio applications.
- Military Radar, EW & ELINT: Suitable for various military communication and surveillance systems.
- Satellite Communications: Used in satellite communication systems due to its high performance and reliability.
- Maritime & Mobile Radio: Applicable in maritime and mobile radio communication systems.
Q & A
- What is the frequency range of the RF input for the HMC908ALC5?
The RF input frequency range is from 9 GHz to 12 GHz.
- What is the typical conversion gain of the HMC908ALC5?
The typical conversion gain is 11 dB.
- What is the noise figure of the HMC908ALC5?
The noise figure is 2.2 dB.
- How much image rejection does the HMC908ALC5 provide?
The device provides up to 25 dB of image rejection.
- What is the LO frequency range for the HMC908ALC5?
The LO frequency range is from 5.5 GHz to 15.5 GHz.
- What is the IF output frequency range of the HMC908ALC5?
The IF output frequency range is from DC to 3.5 GHz.
- Does the HMC908ALC5 require an external 90° hybrid?
Yes, an external 90° hybrid is required to select the desired sideband of operation.
- What is the typical supply current for the LNA and LO amplifier?
The typical supply current for the LNA is 53 mA at 3 V, and for the LO amplifier, it is 100 mA at 5 V.
- Is the HMC908ALC5 RoHS compliant?
Yes, the HMC908ALC5 is packaged in a leadless, RoHS compliant ceramic SMT package.
- What are the typical applications of the HMC908ALC5?
The device is ideal for point-to-point and point-to-multipoint radio, military radar, EW & ELINT, satellite communications, and maritime & mobile radio.
