TIDA-01565

Wired-OR MUX and PGA Reference Design

TIDA-01565

Design files

Overview

This board demonstrates a wired-OR multiplexer (MUX) and a programmable gain amplifier (PGA) application of the OPA837 operational amplifier. These applications are made possible with the high-impedance output of the amplifier and the high-impedance inverting input while in power-down (PD) mode. It is possible to select the output of the MUX or PGA with the onboard dual-inline package (DIP) switches or transistor logic inputs from SMA connectors. The board is single or dual-supply compatible up to 5.25 V. An optional noise filter is included at the output to eliminate broadband noise for PGA designs with lower bandwidth.

Features
  • Change between MUX and PGA configurations
  • Drive with single or dual supplies
  • Supplemental DIP switch input provides simple output selection
  • True input to output isolation

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUDJ0.PDF (4067 K)

Reference design overview and verified performance test data

TIDRWS1.ZIP (168 K)

Detailed schematic diagram for design layout and components

TIDRWS2.PDF (17 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRWS3.PDF (697 K)

Detailed overview of design layout for component placement

TIDRWS5.ZIP (3226 K)

Files used for 3D models or 2D drawings of IC components

TIDCES9.ZIP (2245 K)

Design file that contains information on physical board layer of design PCB

TIDRWS4.PDF (779 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

High-speed op amps (GBW>=50MHz)

OPA837Low Power, Precision, 105 MHz, Voltage Feedback Op Amp

Data sheet document-pdfAcrobat PDF open-in-new HTML
Digital demultiplexers & decoders

SN74LVC1G1392-Line-to-4-Line Decoder

Data sheet document-pdfAcrobat PDF open-in-new HTML
General-purpose op amps

TLV2362Dual, 5-V, 7-MHz, low noise (8-nV/√Hz) operational amplifier

Data sheet document-pdfAcrobat PDF
Inverting buffers & drivers

SN74LVC2G042-ch, 1.65-V to 5.5-V inverters

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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* Design guide Op-Amp in Wired Or Mux Configuration Reference Design Using Disable Pin Jul. 26, 2018

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