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Product Detailed Parameters
- Description：JFET P-Channel 30V Low Noise
- Series：SMPJ270
- Mfr：InterFET
- Package：Strip
- FET Type：P-Channel
- Voltage - Breakdown (V(BR)GSS)：-
- Drain to Source Voltage (Vdss)：30 V
- Current - Drain (Idss) @ Vds (Vgs=0)：7 mA @ 10 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：1.5 V @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：12pF @ 10V
- Resistance - RDS(On)：130 Ohms
- Power - Max：350 mW
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The SMPJ270 is a P-Channel Junction Field Effect Transistor (JFET) manufactured by InterFET, utilizing the proprietary P0099F geometry. It is housed in an SOT23 surface-mount package and operates with a gate-to-source breakdown voltage of 30 V. The device features a typical noise voltage of 6 nV/√Hz at 1 kHz. Key electrical parameters include a drain-to-source saturation current (IDSS) ranging from -2 mA to -15 mA and a forward transconductance (Gfs) between 6 mS and 15 mS. The component supports continuous power dissipation of 360 mW and functions within a junction temperature range of -55°C to 125°C.
Feature Summary
- Utilizes InterFET P0099F geometry for optimized performance
- Provides low noise characteristics suitable for sensitive signal processing
- RoHS compliant manufacturing process
Applications
- Analog Switch circuits
- Sample and Hold systems
- Low Noise High Gain Amplifiers
Procurement Notes
Verify that the specific order matches the SMPJ270 designation for the SOT23 surface-mount variant. Confirm packaging requirements, as bulk shipments use standard ESD materials while reel options are available. Ensure application designs account for the specified maximum ratings and thermal derating curves provided in the official datasheet to maintain reliability under all field conditions.
Selection Notes
Select this component when low noise performance and high gain are critical requirements for analog signal paths. The P-channel configuration allows for direct interface with positive supply rails. Verify that the required cutoff voltage falls within the J270 specification range of 0.5 V to 2.0 V. Ensure the PCB layout accommodates the SOT23 footprint and adheres to the suggested pad dimensions for optimal soldering integrity.
Part Context
This part belongs to the InterFET J270/J271 family of P-Channel JFETs. The SMPJ270 specifically denotes the surface-mount version in the SOT23 case style. It shares core electrical characteristics with the through-hole TO-92 variant but offers different mechanical integration options for automated assembly processes.
Replacement Considerations
The SMPJ271 is the primary alternative within the same product line, distinguished by a higher gate-to-source cutoff voltage range of 1.5 V to 4.5 V compared to the J270's lower threshold.
