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JFE150 Evaluation Module ABSTRACT This user's guide contains information and support documentation for the JFE150 evaluation module (EVM). Included are the circuit description, schematic, and bill of materials of the JFE150EVM. Throughout this document, the terms evaluation board, evaluation module, and EVM are synonymous with the JFE150EVM.
4.1 JFE150EVM Schematic..............................4.2 PCB Layout..................................4.3 Bill of Materials.................................14 List of Figures Figure 3-1. Pre-Amp With JFE150 Front End in a Closed-Loop Circuit..................Figure 3-2. Gain vs Frequency..............................Figure 4-1. JFE150EVM Default Configuration Schematic......................6 Figure 4-2. JFE150EVM Power Supply Connections........................
N-channel JFET capable of operating over a wide drain-to- source voltage of up to 40 V and a gate-to-drain voltage down to –40 V. The JFE150 yields excellent noise performance for currents from 50 μA to 20 mA with extremely high input impedance (> 1 TΩ). When biased at 5 mA, the device yields 0.8 nV/√Hz.
Figure 4-2. If dual-supply operation is required, VSS can be powered separately; adjust components R25 and R12 to bias the JFE150 to the desired bias point. Set Vbias to midsupply, as discussed in section Section 2.3. 2.2 Input The input to the JFE150EVM is designed to interface high-impedance sources to the gate of the JFET.
VDD = 12 V and VSS = GND. The output voltage, Vout, settles to approximately midsupply or 6 V, as shown in Figure 3-1. A theoretical explanation of the preamplifier with a JFE150 front end in a closed-loop circuit is detailed in the JFE150 Ultra-Low-Noise- Pre-Amp application report.
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STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
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www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
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www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
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www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
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