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Product Detailed Parameters
- Description：JFET N-CH 60V TO92
- Series：LSK189
- Mfr：Linear Integrated Systems, Inc.
- Package：Bulk
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：60 V
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：2.5 mA @ 15 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：1.5 V @ 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-226-3, TO-92-3 (TO-226AA)
- Supplier Device Package：TO-92
- Grade：-
- Qualification：-
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Overview
The LSK189 is a single N-channel JFET in a TO-92 package. It features an ultra-low noise voltage of 1.8 nV/√Hz at 1 kHz and low input capacitance of 4 pF. Key electrical parameters include a gate-to-source breakdown voltage of -60 V, a drain-to-source saturation current (IDSS) range of 2.5 to 15 mA, and a transconductance (Gfs) of 1500 µS. The device supports a continuous power dissipation of 300 mW at 25°C and operates within a junction temperature range of -55°C to +150°C.
Feature Summary
- Ultra-low noise performance with a specified voltage noise density of 1.8 nV/√Hz
- Low input capacitance for high-frequency signal integrity
- High transconductance for effective amplification
- Wide operating temperature range suitable for demanding environments
Applications
- Low-noise preamplifiers
- Audio signal processing circuits
- Precision measurement instrumentation
- High-fidelity audio equipment
Procurement Notes
Verify the component matches the specific Linear Integrated Systems datasheet revision A20. Confirm the package type is TO-92 and the RoHS compliance status aligns with project requirements. Ensure the ordering suffix corresponds to the correct packaging format. Cross-reference the part number against official manufacturer documentation to avoid counterfeit or obsolete stock.
Selection Notes
Select this component when minimizing input-referred noise is critical. The low input capacitance makes it suitable for high-impedance sources. Verify that the IDSS range fits the biasing requirements of the target circuit. Consider the thermal derating characteristics if operating above 25°C ambient temperature.
Part Context
Linear Integrated Systems specializes in high-performance discrete semiconductors using proprietary processes. The LSK189 belongs to a family of low-noise JFETs designed for precision analog applications. This specific model offers a balance of low noise and low capacitance in a standard through-hole package.
Replacement Considerations
The LSK489 is documented as an equivalent monolithic dual version. Verify pinout compatibility and electrical parameter overlaps before substitution. No other direct substitutes are confirmed in the provided documentation.
FAQ
What is the typical noise voltage of the LSK189?
The typical noise voltage is 1.8 nV/√Hz at 1 kHz.
What is the maximum gate-to-source voltage?
The maximum gate-to-source voltage is -60 V.
Is the LSK189 available in a dual configuration?
The LSK189 is a single JFET. An equivalent monolithic dual is available as the LSK489.
