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Product Detailed Parameters
- Description：JFET N-Channel -30V Low Ciss
- Series：SMP4220
- Mfr：InterFET
- Package：Tape & Reel (TR)
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：-
- Drain to Source Voltage (Vdss)：30 V
- Current - Drain (Idss) @ Vds (Vgs=0)：1 mA @ 15 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：1 V @ 0.1 nA
- Input Capacitance (Ciss) (Max) @ Vds：3pF @ 15V
- Resistance - RDS(On)：800 Ohms
- Power - Max：350 mW
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The InterFET SMP4220ATR is an N-channel Junction Field-Effect Transistor (JFET) in the 2N4220/A series, packaged in SOT-23 and supplied on a tape and reel. It features a -30V Gate-to-Source Breakdown Voltage (BVGSS), a Drain-to-Source Saturation Current (IDSS) ranging from 0.5mA to 3mA, and a Gate-to-Source Cutoff Voltage (VGS(off)) between -4V and -6V. The device exhibits a Forward Transconductance (GFS) of 1000μS to 4000μS, Input Capacitance (Ciss) up to 6pF, and Reverse Transfer Capacitance (Crss) up to 2pF at 1MHz. Maximum ratings include a continuous power dissipation of 300mW and an operating junction temperature range of -55°C to 150°C.
Feature Summary
- Utilizes InterFET N0016H geometry for optimized performance
- Features low input capacitance and high input impedance
- Offers hermetically sealed TO-72 options suitable for military applications
- Compliant with RoHS standards
Applications
- Mixers
- Oscillators
- Small Signal Amplifiers
- VHF Amplifiers
Procurement Notes
Verify that the specific ordering suffix 'TR' corresponds to the Tape and Reel packaging configuration as documented in the official datasheet. Confirm the component variant matches the required electrical screening criteria, such as the 'A' designation for lower noise specifications if applicable. Ensure the procurement quantity aligns with the specified reel limits of 3,000 pieces for 7-inch reels or 9,000 pieces for 13-inch reels.
Selection Notes
Select this component for sensitive amplifier stages requiring mid-frequency operation. Consider the A-variant if lower noise figures are critical for the application. Evaluate the SOT-23 package dimensions against available PCB space constraints. Verify that the maximum voltage and current ratings meet the circuit requirements under all extreme use conditions.
Part Context
This part belongs to the 2N4220/A and 2N4221/A family of N-channel JFETs manufactured by InterFET Corporation. The family includes various package options such as Through-Hole TO-72, TO-92, Surface Mount SOT-23, and bare die configurations. These devices are designed for general-purpose analog applications, emphasizing precision and low-noise characteristics.
Replacement Considerations
Direct substitutes within the same family include the SMP4221ATR. Cross-manufacturer equivalents may exist but require verification of pinout compatibility and electrical parameter matching against the original datasheet specifications.
FAQ
What is the typical noise figure for this device?
The typical noise figure is 2.5 dB when measured at VDS = 15V, VGS = 0V, f = 100Hz, and RG = 1 MΩ.
What is the maximum continuous forward gate current?
The maximum continuous forward gate current is rated at 10 mA.
Does the 'A' variant offer different specifications than the standard version?
Yes, the 'A' variants are screened specifically for lower noise performance compared to the standard versions.
