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Product Detailed Parameters
- Description：JFET 2N-CH 40V 10MA TO71
- Series：LSK389
- Mfr：Linear Integrated Systems, Inc.
- Package：Bulk
- FET Type：2 N-Channel (Dual)
- Voltage - Breakdown (V(BR)GSS)：40 V
- Drain to Source Voltage (Vdss)：40 V
- Current - Drain (Idss) @ Vds (Vgs=0)：6 mA @ 10 V
- Current Drain (Id) - Max：10 mA
- Voltage - Cutoff (VGS off) @ Id：300 mV @ 1 µA
- Input Capacitance (Ciss) (Max) @ Vds：25pF @ 10V
- Resistance - RDS(On)：-
- Power - Max：400 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 LSK389B TO-71 6L ROHS is an ultra-low noise monolithic dual N-channel JFET amplifier manufactured by Linear Integrated Systems. It features a typical gate-to-source breakdown voltage of -40V and a saturation drain current range of 6 to 12 mA. The device exhibits a typical transconductance of 20 mS, with input capacitance at 25 pF and reverse transfer capacitance at 5.5 pF. Noise performance includes a typical voltage noise of 1.6 nV/√Hz at 1 kHz and 3.2 nV/√Hz at 10 Hz. Maximum power dissipation is rated at 400 mW.
Feature Summary
- Ultra-low noise performance with guaranteed elimination of burst or popcorn noise through 100% testing
- Monolithic dual construction providing tight matching and superior thermal tracking between channels
- High signal-to-noise ratio resulting from low and tightly matched gate threshold voltages
- Wide output swing capability suitable for maximizing battery-operated application performance
Applications
- Audio amplifiers and preamplifiers
- Discrete low-noise operational amplifiers
- Battery-operated audio preamplifiers
- Acoustic sensors and sonic imaging systems
- Instrumentation amplifiers and hydrophones
Procurement Notes
Verify the specific grade suffix (A, B, C, or D) corresponds to the required IDSS range during procurement. Confirm that the package designation matches the TO-71 6L form factor. Ensure RoHS compliance requirements are met as indicated in the ordering information. Cross-reference the datasheet revision number to confirm electrical characteristics have not changed.
Selection Notes
Select the LSK389B variant when the required saturation drain current falls within the 6 to 12 mA range. Consider the TO-71 6L package if through-hole mounting is necessary for the design. Evaluate the 40V breakdown voltage to ensure sufficient headroom for high transient program content. Compare against single JFETs to leverage the improved matching and reduced time consumption offered by the monolithic dual design.
Part Context
The LSK389 series represents an industry-leading solution for ultra-low noise applications, specifically designed to outperform standard discrete components. It serves as an improved second-source replacement for the 2SK389. The series includes grades A through D, offering varying IDSS ranges while maintaining consistent noise and matching specifications across all variants.
Replacement Considerations
The LSK389 is documented as an improved second-source replacement for the 2SK389. For designs requiring a single channel configuration, the LSK170 datasheet should be consulted as the equivalent single N-channel version.
