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Product Detailed Parameters
- Description：JFET 2N-CH 40V 10MA 8SOIC
- Series：LSK389
- Mfr：Linear Integrated Systems, Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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)：2.6 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：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The LSK389A is an ultra-low noise monolithic dual N-channel JFET amplifier from Linear Integrated Systems. It features a typical voltage noise of 1.6 nV/√Hz at 1 kHz and 3.2 nV/√Hz at 10 Hz. The device offers a saturation drain current (IDSS) range of 2.6 to 6.5 mA, with a maximum gate-to-source cutoff voltage differential of 15 mV between channels. It provides a typical transconductance of 20 mS and a breakdown voltage of 40 V. Available in SOIC 8L and TO-71 6L packages.
Feature Summary
- Ultra-low noise performance with guaranteed elimination of burst noise
- Monolithic dual construction for tight matching and thermal tracking
- High signal-to-noise ratio due to low and tightly matched gate threshold voltages
- Wide output swing suitable for battery-operated applications
Applications
- Audio amplifiers and preamps
- Discrete low-noise operational amplifiers
- Battery-operated audio preamps
- Acoustic sensors and sonic imaging
- Instrumentation amplifiers and hydrophones
Procurement Notes
Verify the specific grade suffix matches the required IDSS range before ordering. Confirm package type selection between surface mount SOIC 8L or through-hole TO-71 6L. Ensure RoHS compliance requirements are met by checking the final part number designation. Cross-reference datasheet electrical characteristics against circuit biasing needs.
Selection Notes
Select the LSK389A grade when the application requires a lower saturation drain current range of 2.6 to 6.5 mA. This grade is suitable for circuits where lower power consumption is prioritized alongside ultra-low noise specifications. Consider the monolithic dual design benefits for applications requiring precise channel matching without external trimming.
Part Context
The LSK389 series represents an industry-leading solution for ultra-low noise applications, offering 100% tested devices that meet strict noise specifications. It serves as an improved second-source replacement for the 2SK389. The series includes grades A, B, C, and D, differentiated by IDSS ranges, providing flexibility for various circuit designs.
Replacement Considerations
The LSK389 is documented as an improved second-source replacement for the 2SK389. Designers should verify pinout compatibility and electrical parameter overlaps before substitution. Consult the manufacturer for specific equivalent single-channel alternatives like the LSK170 if dual configuration is not required.
