Overview
The HMC658 is a wideband fixed value 50 Ohm matched attenuator chip produced by Analog Devices Inc. It is part of the HMC650 through HMC658 family, which offers relative attenuation levels of 0, 2, 3, 4, 6, 10, 15, and 20 dB. This component is designed for applications requiring extremely flat attenuation and excellent VSWR (Voltage Standing Wave Ratio) across a wide frequency range.
The HMC658 is particularly suited for microstrip, hybrid, and multi-chip module applications. It features low inductance on-chip vias and does not require additional ground connections. The chip is backside metallized with gold, making it suitable for eutectic or epoxy die attach.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Attenuation Level | 20 dB | |
| Frequency Range | DC - 50 GHz | |
| RF Input Power (CW) | 25 dBm | |
| DC Voltage (Terminated) | 4.8 V | |
| DC Voltage (Open) | 4.9 V | |
| Storage Temperature | -65 to +150 °C | |
| Operating Temperature | -55 to +85 °C | |
| Die Size | 0.57 x 0.45 x 0.1 mm | |
| Package Material | Low Stress Injection Molded Plastic | |
| Lead Finish | Sn/Pb Solder |
Key Features
- Wideband operation from DC to 50 GHz.
- Fixed attenuation level of 20 dB.
- Low inductance on-chip vias, requiring no additional ground connections.
- Backside metallized with gold for eutectic or epoxy die attach.
- Excellent VSWR vs. frequency performance.
- Ideal for microstrip, hybrid, and multi-chip module applications.
Applications
- Fiber Optics.
- Microwave Radio.
- Military & Space Hybrids.
- Test & Measurement.
- Scientific Instruments.
- RF / Microwave Circuit Prototyping.
Q & A
- What is the frequency range of the HMC658 attenuator?
The HMC658 operates from DC to 50 GHz.
- What is the attenuation level of the HMC658?
The HMC658 has a fixed attenuation level of 20 dB.
- What are the typical applications for the HMC658?
The HMC658 is ideal for fiber optics, microwave radio, military & space hybrids, test & measurement, scientific instruments, and RF / microwave circuit prototyping.
- What is the maximum RF input power for the HMC658?
The maximum RF input power for the HMC658 is 25 dBm (CW).
- What are the storage and operating temperature ranges for the HMC658?
The storage temperature range is -65 to +150 °C, and the operating temperature range is -55 to +85 °C.
- How is the HMC658 packaged?
The HMC658 is packaged in a low stress injection molded plastic with Sn/Pb solder lead finish.
- What are the dimensions of the HMC658 die?
The dimensions of the HMC658 die are 0.57 x 0.45 x 0.1 mm.
- Does the HMC658 require additional ground connections?
No, the HMC658 does not require additional ground connections due to its low inductance on-chip vias.
- How can the HMC658 be purchased?
The HMC658 can be purchased individually or as part of the HMC-DK006 Fixed Attenuator Chip Designer’s Kit.
- What is the VSWR performance of the HMC658?
The HMC658 features excellent VSWR vs. frequency performance.
