MGV-125-23

Overview

The MACOM MGV-125-23 is a Gallium Arsenide (GaAs) hyperabrupt varactor diode belonging to the MGV125-x series, characterized by a constant gamma of 1.25. It features a passivated mesa construction designed for low leakage current and stable post-tuning drift performance. The device supports a tuning voltage range from 0 to 22 V with a nominal total capacitance of 1.20 pF at 4 V reverse bias. Electrical specifications include a minimum tuning ratio of 4.0 and a typical Q factor of 3,000 at 50 MHz. Screening options are available in accordance with MIL-PRF-19500 and MIL-PRF-38534 standards.

Feature Summary

• Passivated mesa construction ensures low leakage and excellent post-tuning stability
• Constant gamma of 1.25 provides linear frequency tuning characteristics
• Supports high-frequency operation suitable for tunable filters and oscillators up to 40 GHz

Applications

• Tunable RF filters
• Voltage-controlled oscillators (VCOs)
• Phase shifters
• Frequency multipliers

Procurement Notes

Verify the specific package style required for the application, as the MGV-125-23 is available in both bare chip (C01A) and packaged formats such as E28, H20, P55, and 0805-2. Confirm if military screening per MIL-PRF-19500 or MIL-PRF-38534 is necessary, as this affects the part number suffix and availability. Ensure the ordering quantity aligns with the manufacturer's standard packaging multiples.

Selection Notes

Select the MGV-125-23 when a nominal capacitance of 1.20 pF and a constant gamma of 1.25 are required for hyperabrupt tuning applications. Compare against the MGV100-x and MGV075-x families if different gamma values are needed for specific linearity requirements. Consider the packaged variants if surface-mount assembly is preferred over die-level integration, noting that package parasitics may influence high-frequency performance.

Part Context

The MGV-125-23 is part of the broader MGV125-x series of GaAs hyperabrupt varactor diodes. This series includes various models differentiated primarily by their nominal capacitance values, ranging from 0.30 pF to 2.20 pF. All devices in the series share the same 1.25 constant gamma characteristic and passivated mesa technology, allowing designers to select the appropriate capacitance value while maintaining consistent tuning behavior across the product family.

Replacement Considerations

Direct replacements within the same constant gamma family include other MGV125-x models with similar capacitance values, such as MGV-125-22 or MGV-125-24. For different gamma requirements, consider the MGV100-x (gamma 1.0) or MGV075-x (gamma 0.75) series. Verify that any substitute matches the required tuning ratio and Q factor specifications for the target frequency band.