Overview
The HMC908LC5TR is a compact GaAs (Gallium Arsenide) Monolithic Microwave Integrated Circuit (MMIC) I/Q downconverter produced by Analog Devices Inc. This device is packaged in a leadless, RoHS compliant ceramic leadless chip carrier, making it suitable for surface mount manufacturing techniques. It integrates a low noise amplifier (LNA) followed by an image rejection mixer driven by a local oscillator (LO) buffer amplifier, which eliminates the need for a filter following the LNA and reduces thermal noise at the image frequency. The HMC908LC5TR provides I and Q mixer outputs and requires an external 90° hybrid to select the desired sideband.
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 |
| 1 dB Compression (Input) | -5 | - | - | dBm |
| LO to RF Isolation | 40 | 50 | - | dB |
| LO to IF Isolation | 5 | 10 | - | dB |
| IP3 (Input) | -3 | 2 | - | dBm |
| Supply Current (ID1 + ID2) | 60 | 88 | - | mA |
| Supply Current (ID3) | 100 | 120 | - | mA |
| Supply Voltage (VD3) | - | 5 | - | V |
| Package | - | - | - | 32-TFCQFN Exposed Pad |
Key Features
- Compact GaAs MMIC I/Q downconverter in a leadless, RoHS compliant ceramic package.
- Small signal conversion gain of 11 dB and noise figure of 2.2 dB.
- Image rejection of up to 25 dB.
- LO to RF isolation of up to 50 dB and LO to IF isolation of up to 10 dB.
- Integrated LNA and image rejection mixer, eliminating the need for a post-LNA filter.
- Requires an external 90° hybrid for sideband selection.
- Self-biased LNA and LO driver amplifier.
- Surface mount manufacturing compatible.
Applications
- Point-to-Point and Point-to-Multi-Point Radio.
- Military Radar, EW & ELINT.
- Satellite Communications.
- Maritime & Mobile Radio.
Q & A
- What is the frequency range of the RF input for the HMC908LC5TR? The RF input frequency range is from 9 GHz to 12 GHz.
- What is the typical conversion gain of the HMC908LC5TR? The typical conversion gain is 11 dB.
- What is the noise figure of the HMC908LC5TR? The noise figure is typically 2.2 dB.
- What is the image rejection capability of the HMC908LC5TR? The image rejection is up to 25 dB.
- What type of package does the HMC908LC5TR come in? It comes in a 32-TFCQFN Exposed Pad package.
- What are the supply voltage and current requirements for the HMC908LC5TR? The supply voltage is typically 5V, and the supply currents are 60-88 mA for ID1+ID2 and 100-120 mA for ID3.
- Does the HMC908LC5TR require any external components for operation? Yes, it requires an external 90° hybrid for selecting the desired sideband.
- What are some typical applications of the HMC908LC5TR? It is used in point-to-point and point-to-multipoint radio, military radar, EW & ELINT, satellite communications, and maritime & mobile radio.
- Is the HMC908LC5TR RoHS compliant? Yes, it is RoHS compliant.
- What is the LO frequency range for the HMC908LC5TR? The LO frequency range is from 5.5 GHz to 15.5 GHz.
