JFE2140

ACTIVE

Dual, ultra-low noise, low-gate-current audio N-channel JFET

Product details

Vn at 1 kHz (nV√Hz) 0.9 Breakdown voltage (V) 40 VDS (V) 40 VGS (V) -40 VGSTH typ (typ) (V) 1.2 Rating Catalog Operating temperature range (°C) -40 to 125
Vn at 1 kHz (nV√Hz) 0.9 Breakdown voltage (V) 40 VDS (V) 40 VGS (V) -40 VGSTH typ (typ) (V) 1.2 Rating Catalog Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6 WSON (DSG) 8 4 mm² 2 x 2
  • Ultra-low noise:
    • Voltage noise:
      • 0.9 nV/√ Hz at 1 kHz, I DS = 5 mA
      • 1.1 nV/√ Hz at 1 kHz, I DS = 2 mA
    • Current noise: 1.6 fA/√ Hz at 1 kHz
  • Low V GS mismatch: 4 mV (max)
  • Low gate current: 10 pA (max)
  • Low input capacitance: 13 pF at V DS = 5 V

  • High gate-to-drain and gate-to-source breakdown voltage: –40 V

  • High transconductance: 30 mS

  • Packages: SOIC, 2-mm × 2-mm WSON

  • Ultra-low noise:
    • Voltage noise:
      • 0.9 nV/√ Hz at 1 kHz, I DS = 5 mA
      • 1.1 nV/√ Hz at 1 kHz, I DS = 2 mA
    • Current noise: 1.6 fA/√ Hz at 1 kHz
  • Low V GS mismatch: 4 mV (max)
  • Low gate current: 10 pA (max)
  • Low input capacitance: 13 pF at V DS = 5 V

  • High gate-to-drain and gate-to-source breakdown voltage: –40 V

  • High transconductance: 30 mS

  • Packages: SOIC, 2-mm × 2-mm WSON

The JFE2140 is a Burr-Brown™ Audio, matched-pair discrete JFET built using Texas Instruments’ modern, high-performance, analog bipolar process. The JFE2140 features performance not previously available in older discrete JFET technologies. The JFE2140 offers excellent noise performance across all current ranges, where the quiescent current can be set by the user from 50 µA to 20 mA. When biased at 5 mA, the device yields 0.9 nV/√ Hz of input-referred noise, giving ultra-low noise performance with extremely high input impedance (> 1 TΩ). In addition, the matching between JFETs is tested to ±4 mV, providing low offset and high CMRR performance for differential pair configurations. The JFE2140 also features integrated diodes connected to separate clamp nodes to provide protection without the addition of high leakage, nonlinear external diodes.

The JFE2140 can withstand a high drain-to-source voltage of 40‑V, as well as gate-to-source and gate-to-drain voltages down to –40 V. The temperature range is specified from –40°C to +125°C.

The JFE2140 is a Burr-Brown™ Audio, matched-pair discrete JFET built using Texas Instruments’ modern, high-performance, analog bipolar process. The JFE2140 features performance not previously available in older discrete JFET technologies. The JFE2140 offers excellent noise performance across all current ranges, where the quiescent current can be set by the user from 50 µA to 20 mA. When biased at 5 mA, the device yields 0.9 nV/√ Hz of input-referred noise, giving ultra-low noise performance with extremely high input impedance (> 1 TΩ). In addition, the matching between JFETs is tested to ±4 mV, providing low offset and high CMRR performance for differential pair configurations. The JFE2140 also features integrated diodes connected to separate clamp nodes to provide protection without the addition of high leakage, nonlinear external diodes.

The JFE2140 can withstand a high drain-to-source voltage of 40‑V, as well as gate-to-source and gate-to-drain voltages down to –40 V. The temperature range is specified from –40°C to +125°C.

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Technical documentation

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* Data sheet JFE2140 Ultra-Low Noise, Matched, Dual, Low-Gate Current, Discrete, Audio, N‑Channel JFET datasheet (Rev. B) PDF | HTML 31 Aug 2023
Application brief Ultra-Low-Noise JFET Preamplifier Design for High Impedance Sensors PDF | HTML 16 May 2024
Application note JFE2140 Ultra-Low-Noise Pre-Amplifier PDF | HTML 02 Mar 2023
User guide JFE2140 Evaluation Module Users Guide PDF | HTML 20 Sep 2022
Certificate JFE2140EVM EU RoHS Declaration of Conformity (DoC) 07 Sep 2022

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

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User guide: PDF
Not available on TI.com
Evaluation board

JFE2140EVM — JFE2140 evaluation module for dual, ultra-low-noise, low-gate-current audio N-channel JFET

The JFE2140 evaluation module (EVM) provides a basic functional evaluation of the JFE2140. The EVM is in a closed-loop preamplifier configuration providing 60 dB of gain on a split ±5-V supply. User modifications can be made for a variety of circuit configurations.

User guide: PDF | HTML
Not available on TI.com
Simulation model

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SLPM356.TSC (137 KB) - TINA-TI Reference Design
Simulation model

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SLPM355.ZIP (53 KB) - PSpice Model
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Simulation tool

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Simulation tool

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User guide: PDF
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SOIC (D) 8 Ultra Librarian
WSON (DSG) 8 Ultra Librarian

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