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This user's guide describes the characteristics, operation, and use of the evaluation module (EVM) for the
OPA462. The EVM is designed to evaluate the performance of the devices in both single and dual-supply
configurations. This document also includes the schematic, printed circuit board (PCB) layout, and a bill of
materials (BOM). Throughout this document the terms evaluation board, evaluation module, and EVM are
synonymous with OPA462EVM.
Danger: HIGH VOLTAGE! This evaluation board is intended for
professional use only. It has exposed high voltages. Do not
operate this board without proper high-voltage/high-current safety
practices. Read
SBOU175 – October 2019
Submit Documentation Feedback
WARNING
Section 1.4
before using the EVM.
Copyright © 2019, Texas Instruments Incorporated
User's Guide
SBOU175 – October 2019
OPA462EVM
1
OPA462EVM
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Summary of Contents for Texas Instruments OPA462
- Page 1 This user's guide describes the characteristics, operation, and use of the evaluation module (EVM) for the OPA462. The EVM is designed to evaluate the performance of the devices in both single and dual-supply configurations. This document also includes the schematic, printed circuit board (PCB) layout, and a bill of materials (BOM).
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Page 2: Table Of Contents
Related Documentation ......................... Jumper Table ......................OPA462EVM BOM Trademarks PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. OPA462EVM SBOU175 – October 2019 Submit Documentation Feedback Copyright © 2019, Texas Instruments Incorporated... -
Page 3: Overview
1.4.1 High Voltage Warning The OPA462 is rated for supply voltages up to ±90 V (180 V for single supply), and common-mode input voltages up to ±85 V. When using the device and EVM under such circumstances, all proper safety practices must be followed. -
Page 4: Getting Started
Shorting pins 2 and 3 of J5 sets the EVM to single supply, and shorting pins 1 and 2 of J5 sets up the EVM for dual supplies. The OPA462 is capable of sourcing or sinking up to 30 mA of current. -
Page 5: Status Flag
Status Flag The OPA462 incorporates a status flag pin to indicate overcurrent or overtemperature conditions. This pin is an open-drain, active-low output that allows the pin to be easily interfaced with standard low-voltage logic. The pin goes active if the junction temperature of the device rises to greater than 150°C, and resets after the device cools to 130°C. -
Page 6: Application Circuits
Figure 1. Practical, 20-mA, Improved Howland Current-Pump Circuit Practical current sources have a limited output voltage range that can be covered. The OPA462 op amp has a wide output voltage range because of the high-voltage supplies used. The OPA462 data sheet provides information about the linear output voltage range that should always be observed. -
Page 7: Improved Howland Current Pump Output-Voltage Compliance Range
The improved Howland current pump can be used to generate an ac waveform with a peak current that corresponds to a maximum specified dc value. A 20-mA dc current source using the OPA462 has been demonstrated, and will now be used to show how a 20-mA peak ac-current waveform can be realized. -
Page 8: Improved Howland Current Pump Applied As A Peak Ac-Current Generator
R10 (Rsn), C16 (Csn, snubber), and C9 and C10 in the feedback loop. Compensation, when required, is determined based on the particular circuit to which the OPA462 is being applied. Op amp stability and compensation is a vast subject covered in numerous TI documents, and TI training programs such as TI Precision Labs –... -
Page 9: Schematic, Pcb Layout, And Bill Of Materials
R7 Rhcp E/D Com Vout +In Select 0.1uF Input Protection Rref Q Q A TP15 VREF Ext Q Q B VREF Select Figure 4. OPA462EVM Schematic SBOU175 – October 2019 OPA462EVM Submit Documentation Feedback Copyright © 2019, Texas Instruments Incorporated... -
Page 10: Evm Default Configuration
0.1uF 0.1uF 10uF 10uF TP12 100k -In Select Vout 0.1uF TP13 TP14 OPA462IDDAR Riso Rhcp E/D Com Vout +In Select 0.1uF Figure 5. OPA462EVM Default Configuration OPA462EVM SBOU175 – October 2019 Submit Documentation Feedback Copyright © 2019, Texas Instruments Incorporated... -
Page 11: Pcb Layout
NOTE: Board layout is not to scale. This figure is intended to show how the board is laid out, and is not intended to be used for manufacturing OPA462EVM PCBs. SBOU175 – October 2019 OPA462EVM Submit Documentation Feedback Copyright © 2019, Texas Instruments Incorporated... -
Page 12: Bill Of Materials
FID1, FID2, FID3 Optional-Not installed Q1, Q2 JFET, 2-CH, N-CH, V, A, SOIC-8 IF1322A InterFET Optional-Not installed R5, R11, R12 Optional-Not installed R9, R10 Optional-Not installed OPA462EVM SBOU175 – October 2019 Submit Documentation Feedback Copyright © 2019, Texas Instruments Incorporated... - Page 13 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.
- Page 14 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.
- Page 15 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...
- Page 16 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.
- Page 17 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2019, Texas Instruments Incorporated...
- Page 18 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2019, Texas Instruments Incorporated...
- Page 19 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments OPA462EVM...
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