Overview
The HMC641 is a broadband non-reflective GaAs PHEMT SP4T (Single Pole, Four Throw) switch chip manufactured by Analog Devices Inc. This switch covers a wide frequency range from DC to 18 GHz, offering high isolation and low insertion loss. It is part of Hittite Microwave Corporation's (now part of Analog Devices) SP4T switch product line, known for its extended frequency coverage and integrated on-board binary decoder circuit, which reduces the number of required logic control lines to two. The switch operates with a negative control voltage of 0/-5V and requires a fixed Vss bias of -5V.
Key Specifications
| Parameter | Frequency | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|
| Insertion Loss | DC - 12 GHz | 1.8 | 2.1 | 2.8 | dB |
| Insertion Loss | DC - 18 GHz | 2.1 | 2.8 | 3.1 | dB |
| Isolation (RFC to RF1 - RF4) | DC - 12 GHz | 39 | 42 | 40 | dB |
| Isolation (RFC to RF1 - RF4) | DC - 18 GHz | 37 | 42 | 40 | dB |
| Return Loss “On State” | DC - 12 GHz | 12 | 15 | 14 | dB |
| Return Loss “On State” | DC - 18 GHz | 11 | 15 | 14 | dB |
| Return Loss “Off State” | DC - 18 GHz | 12 | 15 | dB | |
| Input Power for 1 dB Compression | 2.05 - 18 GHz | 21 | 24 | dBm |
Key Features
- Broadband performance from DC to 18 GHz
- High isolation: up to 42 dB at 12 GHz
- Low insertion loss: 2.1 dB at 12 GHz
- Integrated 2:4 TTL decoder reducing the number of required logic control lines to two
- Compact size: 1.92 x 1.60 x 0.10 mm (die form)
- Operates with 0/-5V control voltage and fixed Vss bias of -5V
- Fast switching speed and low DC current consumption compared to pin diode based solutions
Applications
- Telecom Infrastructure
- Microwave Radio & VSAT
- Military & Space Hybrids
- Test Instrumentation
- SATCOM & Sensors
Q & A
- What is the frequency range of the HMC641 switch? The HMC641 switch operates from DC to 18 GHz.
- What is the typical insertion loss of the HMC641 at 12 GHz? The typical insertion loss is 2.1 dB at 12 GHz.
- What is the isolation level of the HMC641 at 12 GHz? The isolation level is up to 42 dB at 12 GHz.
- What type of decoder is integrated into the HMC641? The HMC641 includes an on-board 2:4 TTL decoder.
- What is the control voltage for the HMC641? The switch operates with a control voltage of 0/-5V and a fixed Vss bias of -5V.
- What are the typical applications of the HMC641? Typical applications include telecom infrastructure, microwave radio & VSAT, military & space hybrids, test instrumentation, and SATCOM & sensors.
- How does the HMC641 reduce the number of control lines needed? The integrated 2:4 TTL decoder reduces the number of required logic control lines from four to two.
- What is the package size of the HMC641LC4 version? The HMC641LC4 is available in a compact 4x4 mm ceramic package.
- What is the input power for 1 dB compression for the HMC641? The input power for 1 dB compression is 21 dBm to 24 dBm from 2.05 GHz to 18 GHz.
- Is the HMC641 available in die form? Yes, the HMC641 is also available in die form.
