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Isolated digital inputs

ISO1211

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Single-channel Isolated 24-V to 60-V digital input receiver for digital input modules

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Data sheet

ISO1211

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Product details

Number of channels (#) 1 Forward/reverse channels 1/0 Isolation rating (Vrms) 2500 Data rate (Max) (Mbps) 4 Rating Catalog Supply voltage (Max) (V) 60 Supply voltage (Min) (V) 2.25 Surge voltage capability (Vpk) 5200 Operating temperature range (C) -40 to 125 Propagation delay (Typ) (ns) 140
Number of channels (#) 1 Forward/reverse channels 1/0 Isolation rating (Vrms) 2500 Data rate (Max) (Mbps) 4 Rating Catalog Supply voltage (Max) (V) 60 Supply voltage (Min) (V) 2.25 Surge voltage capability (Vpk) 5200 Operating temperature range (C) -40 to 125 Propagation delay (Typ) (ns) 140
SOIC (D) 8 19 mm² 4.9 x 3.9
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Technical documentation

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Type Title Date
* Data sheet ISO121x Isolated 24-V to 60-V Digital Input Receivers for Digital Input Modules datasheet (Rev. F) 16 Apr 2020
Certificate TUV Certificate for Isolation Devices (Rev. J) 23 Aug 2021
Certificate CQC Certification (Rev. G) 19 Aug 2021
Certificate VDE Certificate for Basic Isolation for DIN VDE V 0884-11:2017-01 (Rev. S) 03 Aug 2021
Certificate CSA Certification (Rev. Q) 14 Jun 2021
Certificate UL Certification (Rev. O) 03 Feb 2021
Technical article Understand and apply safety-limiting values for digital isolators 20 Jan 2021
Application note How to Design Isolated Digital Input Modules for Surge Immunity 31 Mar 2020
Technical article Solving lifetime and temperature challenges in AC motor drives with capacitive-based isolation 01 Nov 2019
Technical article Optocouplers and silicon-based galvanic isolation technology – how do they work? 28 Oct 2019
White paper How Capacitive Isolation Solves Key Challenges in AC Motor Drives 23 Aug 2019
Application note An Isolated 24 V Power Supply Window Monitor 01 Aug 2019
Technical article What are isolated digital inputs? 08 Mar 2019
Application note Space saving design techniques for multi-channel high-voltage DI modules (Rev. B) 02 Oct 2018
Application note How to Design Isolated Comparators for ±48V, 110V and 240V DC and AC Detection (Rev. A) 14 Mar 2018
Application note How To Simplify Isolated 24-V PLC Digital Input Module Designs (Rev. B) 14 Mar 2018
Application note ISO121x Threshold Calculator for 9V to 300V DC and AC Voltage Detection 01 Mar 2018
User guide ISO1211 Isolated Digital-Input Receiver Evaluation Module (Rev. A) 18 Jan 2018
Application note How to Improve Speed and Reliability of Isolated Digital Inputs in Motor Drives 16 Dec 2017
Analog design journal How to use isolation to improve ESD, EFT and surge immunity in industrial system 24 Jul 2017

Design & development

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

Evaluation board

ISO1211EVM — Evaluation module for the ISO1211 isolated digital input receiver

The ISO1211EVM is an evaluaiton module (EVM) used to evaluate the ISO1211 isolated industrial reciever that can receive a 9-V to 60-V field input and provide an isolated digital output. The EVM accomodates two ISO1211 devices showcasing 2 channel functionality. The EVM features enough test (...)
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Simulation model

ISO121X IBIS Model (Rev. B)

SLLM372B.ZIP (52 KB) - IBIS Model
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Simulation model

ISO1211 PSpice Transient Model (Rev. C)

SLLM383C.ZIP (117 KB) - PSpice Model
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Simulation model

ISO1211 TINA-TI Transient Spice Model (Rev. A)

SLLM389A.ZIP (12 KB) - TINA-TI Spice Model
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Simulation model

ISO1211 TINA-TI Transient Reference Design

SLLM390.TSC (1859 KB) - TINA-TI Reference Design
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Simulation model

ISO1211 TINA-TI Transient Reference Design (Rev. A)

SLLM390A.TSC (1859 KB) - TINA-TI Reference Design
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Reference designs

TIDA-01509 — Broken Wire Detection Using An Optical Switch Reference Design

This reference design shows a compact implementation of 16 isolated digital input channels using TI's ISO121x devices. The design is split into two groups of eight channels each. A broken wire detection can be executed using only one additional optical switch for each channel or two optical (...)
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Reference designs

TIDA-01508 — Sub 1-W, 16-Channel, Isolated Digital Input Module Reference Design

This reference design shows a compact implementation of 16 isolated digital input channels using TI's ISO121x devices. The design works without an isolated supply and supports up to 100-kHz input signals (200-kbit) per channel. All 16 channels consume less than 1-W input power combined, which (...)
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