TIDA-01333

8-ch Isolated High Voltage Analog Input Module with ISOW7841 Reference Design

TIDA-01333

Design files

Overview

The TIDA-01333 isolated high voltage analog input module reference design has eight channels supporting both, voltage and current measurement. In addition, 4 channels support common-mode voltages up to ±160V. Isolation of +5V line and the Serial Peripheral Interface  (SPI) communication is done in a single chip using the ISOW7841. The design uses ADS8681 which is a 16-bit analog to digital converter (ADC)  that can handle input voltages up to ±12.288V. This makes unnecessary any preprocessing of standard input voltages in the industrial space.

Features
  • Isolated 5V supply + isolated SPI in one chip
  • Switching between voltage and current measurement for every channel
  • 4 channels with common-mode voltage of up to ±160V
  • 100MOhm input impedance
  • BeagleBone compatible

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.

TIDUCU4.PDF (1406 K)

Reference design overview and verified performance test data

TIDRQD4.PDF (1459 K)

Detailed schematic diagram for design layout and components

TIDRQD5.PDF (77 K)

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

TIDRQD6.PDF (712 K)

Detailed overview of design layout for component placement

TIDRQD8.ZIP (2244 K)

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

TIDCDA5.ZIP (623 K)

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

TIDRQD7.PDF (3833 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Analog switches & muxes

MUX36S081-pA on-state leakage current, 36-V, 8:1, 1-channel precision analog multiplexer

Data sheet document-pdfAcrobat PDF open-in-new HTML
Analog switches & muxes

TS5A231575-V, 2:1 (SPDT), 2-channel analog switch

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

INA149High Common Mode Voltage Difference Amplifier

Data sheet document-pdfAcrobat PDF
Digital isolators

ISO7140CCQuad-channel, 4/0, 50-Mbps digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Fixed-direction voltage translators

SN74LV1T125Single Power Supply, Single BUFFER GATE w/ 3-State Output (active low enable)

Data sheet document-pdfAcrobat PDF
Isolated DC/DC converters & modules

TPS550102.95V To 6V Input, 2W, Isolated DC/DC Converter with Integrated FETS

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

SN74LVC1G332Single 3-input, 1.65-V to 5.5-V OR gate

Data sheet document-pdfAcrobat PDF
Precision ADCs (<=10MSPS)

ADS868116-Bit, 1-MSPS, 1-Ch SAR ADC with programmable (±12/±10/±6/±5/±2.5V) input ranges on +5V supply

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision op amps (Vos<1mV)

OPA192High-Voltage, Rail-to-Rail Input/Output, 5µV, 0.2µV/˚C, Precision Operational Amplifier

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

SN74AHC5948-Bit Shift Registers With Output Registers

Data sheet document-pdfAcrobat PDF open-in-new HTML
Signal isolators with integrated power

ISOW7841Quad-channel, 3/1, reinforced digital isolator with integrated power

Data sheet document-pdfAcrobat PDF open-in-new HTML
XOR (exclusive OR) gates

SN74LVC2G862-ch, 2-input, 1.65-V to 5.5-V XOR (exclusive OR) gates

Data sheet document-pdfAcrobat PDF

Technical documentation

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Type Title Date
* Design guide Eight-Channel, Isolated, High-Voltage Analog Input Module With ISOW7841 Design Feb. 24, 2017
White paper Cities grow smarter through innovative semiconductor technologies Jul. 07, 2017

Related design resources

Reference designs

REFERENCE DESIGN
TIDA-00764 8-ch Isolated High Voltage Analog Input Module Reference Design

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