SMP4220A

Overview

The InterFET SMP4220A is an N-Channel JFET utilizing N0016H geometry, designed for sensitive amplifier stages in mid-frequency applications. It features a typical noise figure of 6 nV/√Hz and low input capacitance of 3.5pF. The device offers high input impedance with gate leakage typically less than 10pA at room temperature. Key electrical parameters include a gate-to-source breakdown voltage (BV_GSS) of -30V, drain-to-source saturation current (IDSS) ranging from 0.5mA to 3mA, and forward transconductance (GFS) between 1000μS and 4000μS. The 'A' variant is screened for lower noise performance.

Feature Summary

• Utilizes InterFET N0016H geometry for optimized performance
• Screened 'A' variants provide lower noise characteristics
• Hermetically sealed TO-72 package suitable for military applications
• High input impedance with minimal gate leakage

Applications

• Mixers
• Oscillators
• Small Signal Amplifiers
• VHF Amplifiers

Procurement Notes

Verify the specific ordering suffix to confirm the package type and binning requirements. The SMP4220A designation indicates a surface-mount SOT23 configuration. Ensure that the procurement documentation aligns with the required tape and reel specifications or bulk packaging options as defined in the official InterFET ordering information section.

Selection Notes

Select the SMP4220A when low noise and high input impedance are critical for mid-frequency designs. The 'A' suffix denotes screening for superior noise figures compared to standard variants. Consider the SOT23 package for space-constrained surface-mount layouts while ensuring compatibility with the suggested pad layout dimensions provided in the mechanical data.

Part Context

The SMP4220A belongs to the InterFET 2N4220/A and 2N4221/A family of N-Channel JFETs. This series is engineered for sensitive amplifier stages, offering distinct performance tiers through 'A' variant screening. The product line supports various mounting styles including through-hole, surface mount, and bare die options to accommodate diverse circuit design requirements.

Replacement Considerations

Direct substitutes within the same family include the SMP4221A, which shares identical packaging but differs in IDSS and GFS minimums. Standard non-'A' variants like SMP4220 may be considered if noise screening is not required. Verify pinout compatibility across TO-72, TO-92, and SOT23 packages when cross-referencing with other manufacturers.