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Product Detailed Parameters
- Description：JFET 2N-CH 50V TO71
- Series：U406
- Mfr：Linear Integrated Systems, Inc.
- Package：Bulk
- FET Type：2 N-Channel (Dual)
- Voltage - Breakdown (V(BR)GSS)：50 V
- Drain to Source Voltage (Vdss)：50 V
- Current - Drain (Idss) @ Vds (Vgs=0)：500 µA @ 10 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：500 mV @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：8pF @ 15V
- Resistance - RDS(On)：-
- Power - Max：300 mW
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-71-6 Metal Can
- Supplier Device Package：TO-71
- Grade：-
- Qualification：-
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Overview
The U406 TO-71 6L is a monolithic dual N-channel JFET amplifier manufactured by Linear Integrated Systems. It features low leakage and low drift characteristics, designed for high input impedance applications with a maximum gate current of 0.25 pA. The device operates from low power supply voltages, with a maximum VGS(off) of 2V and a minimum gain of 120 µmho. Packaged in the TO-71 metal can format, it supports single or dual supply configurations suitable for precision analog signal processing.
Feature Summary
- Monolithic dual N-channel JFET architecture ensuring matched channel performance
- Ultra-low input bias current for minimal signal loading
- Low temperature drift for stable operation across varying thermal conditions
- High output impedance capability for versatile circuit integration
Applications
- Precision instrumentation amplifiers requiring high input impedance
- Low-level signal conditioning in measurement systems
- Chopper-stabilized amplifier circuits
- Sample-and-hold circuits demanding low charge injection
Procurement Notes
Verify the specific suffix and pinout configuration against the official datasheet before procurement. Confirm that the TO-71 package variant matches the required footprint and lead arrangement. Ensure environmental specifications align with the intended operating temperature range. Cross-reference the manufacturer part number to avoid confusion with similar JFET arrays.
Selection Notes
Select this component when application requirements prioritize extremely low input leakage current over high bandwidth. The dual configuration allows for differential signaling or independent channel usage within a compact package. Evaluate the trade-off between the low noise performance and the physical size constraints of the TO-71 housing compared to modern surface-mount alternatives.
Part Context
This component belongs to the family of low-drift monolithic JFET amplifiers produced by Linear Integrated Systems. It shares architectural similarities with other devices in the series, such as the LS421 and U404, focusing on precision analog front-end applications. The TO-71 package represents a traditional hermetic metal can style often used in military or high-reliability aerospace contexts where long-term stability is critical.
Replacement Considerations
Potential substitutes include the LS421 or U404 from the same manufacturer family, which share similar electrical characteristics. Verify pin compatibility and package dimensions before substitution. Other generic dual N-channel JFETs may require significant circuit redesign due to differences in leakage current and transconductance specifications.
