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Product Detailed Parameters
- Description：JFET N-CH 40V SOT23-3
- Series：LSK170D
- Mfr：Linear Integrated Systems, Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：40 V
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：18 mA @ 10 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：200 mV @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：20pF @ 15V
- Resistance - RDS(On)：-
- Power - Max：400 mW
- Operating Temperature：-55°C ~ 135°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The LSK170D is a single N-channel JFET in an SOT-23 3L package. It features a Gate to Source Breakdown Voltage (BVGSS) of -40.0V minimum and a Drain to Source Saturation Current (IDSS) range of 18.0mA to 30.0mA at VDS=10V, VGS=0. The device offers a typical Full Conduction Transconductance (Gfs) of 22.0mS and ultra-low noise voltage of 0.9nV/√Hz at 1kHz. Input capacitance is 20.0pF maximum.
Feature Summary
- Ultra-low noise performance with narrow IDSS range for stable low-noise applications
- High input impedance and high breakdown voltage for linear headroom
- Direct pin-for-pin replacement for Toshiba's 2SK170
Applications
- Audio Amplifiers and Preamps
- Discrete Low-Noise Operational Amplifiers
- Acoustic Sensors and Hydrophones
- Electrometers and Vibrations Detectors
Procurement Notes
Verify the specific suffix 'D' corresponds to the required IDSS grading (18.0mA to 30.0mA). Confirm RoHS compliance status as standard parts are compliant. Ensure the SOT-23 3L package matches the PCB footprint. Check datasheet for lot sampling guarantees on voltage specifications.
Selection Notes
Select this part when low noise and high input impedance are critical. The D grade provides higher saturation current than A, B, or C grades. Suitable for portable battery-operated applications due to narrow IDSS range. Consider the LSK389 series if a monolithic dual configuration is needed instead.
Part Context
Part of the LSK170 series designed for audio, instrumentation, medical, and sensor markets. The series includes TO-92, SOT-23, and SOT-89 packages. It serves as an improved functional replacement for Interfet IF1320, IF1330, IF1331, and IF4500 devices.
Replacement Considerations
- Toshiba 2SK170
- Interfet IF1320
- Interfet IF1330
- Interfet IF1331
- Interfet IF4500
FAQ
What is the Gate to Source Pinch-off Voltage range for the LSK170D?
The Gate to Source Pinch-off Voltage (VGS(OFF)) ranges from -0.2V to -2.0V.
Is the LSK170D suitable for high transient program content amplifiers?
Yes, it features high BVDSS for maximum linear headroom in such applications.
What is the typical conduction transconductance at VDS=15V and ID=1mA?
The Typical Conduction Transconductance (Gfs) is between 6.0mS and 10.0mS under these conditions.
