8-Channel isolated digital input
8-Channel isolated digital input

Product Details

General Description

The CA-IS398x family of isolated octal digital inputs are optimized for industrial 24V digital input applications. All devices can be configured for Type 1, Type 2, or Type 3 inputs with a few external components and each channel can sink and source current. The isolation channels based on Chipanalog’s advanced capacitive isolation technology feature up to 2.5kVRMS isolation rating and ±300kV/μs typical CMTI (low-speed channels), provide high electromagnetic immunity, low propagation delay and low jitter.

The CA-IS398x devices operate over the supply range of 2.25V to 5.5V on logic side, no power supply required on field side. The logic output level is set by supply voltage independently, easy to connect with 2.5V, 3.3V and 5V controller interface. The CA-IS3980S industrial interface serializer translates, conditions and serializes the eight 24V digital inputs to CMOS-compatible signals through the SPI port required by microcontrollers; While the CA-IS398xP/ PF/PM/PS devices translate eight 24V industrial digital inputs to eight CMOS-compatible parallel outputs. All devices provide isolated digital outputs and all digital inputs can be current-sinking or current sourcing industrial inputs (bidirectional inputs) from sensors and switches used in industrial, process, and building automation. For robust operation in industrial environments, each input of the CA-IS398x with parallel outputs includes a glitch and debounce filters with fixed delay time; The CA-IS3980S features programmable debounce filters, allow flexible debouncing and filtering of sensor outputs based on the application. Also, for systems with more than eight sensor inputs, CA-IS3980S is capable of daisy-chaining multiple devices and have up to 128 inputs sharing the same isolated SPI interface. A simplified block diagram for the CA-IS398x is shown in the figure below.

The CA-IS398x family of devices are specified over -40°C to +125°C operating temperature range and are available in 20-pin SSOP package. Also see the Ordering Information for suffixes associated output interface and filter delay time configuration options.

Accepts Industry Standard Input TypesCompliant to IEC 61131-2 Input Types 1, 2, and 3
High IntegrationEight input channels with serializer (CA-IS3980S)
Eight input channels with parallel-output s (CA-IS398xP)
Support up to 2Mbps Data Rates
Integrated Digital Glitch and Debounce Filters with 0 to 100ms Selectable Delay Time
High transient immunity±300kV/µs CMTI for the low-speed channels
±50kV/µs CMTI for the high-speed channels
2500VRMS Integrated Isolation Reduces BOM and FootprintSPI-Compatible Serial Interface (CA-IS3980S only)
2.25V to 5.5V Single Supply , Eliminates the Need For Field-side Power Supply
Ambient Operating Temperature-40°C to 125°C
Safety Regulatory Approvals (pending)DIN VVDE V 0884-10 Basic isolation
UL1577 certification, 2500 VRMS insulation
CSA according to GB4943.1-2011 certification
TUV according to EN61010-1:2010 (3rd Ed) and EN 60950-1:2006/A2:2013 certifications
Package20-pin SSOP

◎ Digital Input Modules for PLCs
◎ Industrial, Building, and Process Automation
◎ Motor Control
◎ CNC Control
◎ Industrial data acquisition

Device information
Part Number PackagePackage Size (NOM)
20-pin SSOP8.66mm×3.91mm
Simplified Channel Structure

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