ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：JFET 2N-CH 60V 8SOIC
- Series：LSK489
- Mfr：Linear Integrated Systems, Inc.
- Package：Tube
- FET Type：2 N-Channel (Dual)
- 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：500 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：-
Download product information
Overview
The LSK489 is a monolithic dual N-Channel JFET amplifier featuring industry-low input capacitance of 4pF and low noise voltage of 1.8nV/√Hz at 1kHz. It offers high CMRR of 102dB, tight differential voltage matching, and low offset drift. Available in SOIC-8L, SOT-23-6L, and TO-71-6L packages, it provides improved op-amp speed and accuracy with minimal intermodulation distortion.
Feature Summary
- Monolithic dual N-Channel JFET design with interleaved construction for excellent thermal tracking and matching.
- Ultra-low common source input capacitance significantly reduces intermodulation distortion.
- High common mode rejection ratio ensures precision performance in instrumentation applications.
- Low gate leakage current and low offset voltage drift over temperature range.
Applications
- Wideband differential amplifiers
- High-speed temperature compensated single-ended input amplifiers
- High-speed comparators
- Impedance converters
- Sonobuoys and hydrophones
Procurement Notes
Verify the specific grade (A or B) required for your application, as IDSS ranges differ between grades. Confirm package availability matches the SOIC-8L requirement. Ensure compatibility with existing circuit designs referencing LSK389 due to pin compatibility. Check datasheet limits for VGS(off) and IDSS if precise trimming is needed.
Selection Notes
Select the LSK489 when low input capacitance is critical to minimize intermodulation distortion compared to higher capacitance alternatives like the LSK389. Choose Grade A for tighter IDSS matching (ΔIDSS = 6mA) or Grade B for broader current ranges. Consider the SOIC-8L package for surface mount integration while maintaining pin compatibility with through-hole variants.
Part Context
The LSK489 serves as a low-noise, low-capacitance alternative to the LSK389, offering similar noise performance but with substantially lower gate-to-drain capacitance (4pF vs 25pF). It is part of Linear Integrated Systems' portfolio of precision JFETs, designed for applications requiring high speed and accuracy without the complexity of multi-device solutions.
Replacement Considerations
The LSK489 is fit, form, and pin-compatible with the LSK389 in both TO-71 and SOIC packages, allowing for direct interchangeability. Designers should account for the difference in input capacitance (4pF vs 25pF) which affects intermodulation distortion characteristics.
