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ISO1228

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Eight-channel isolated 24-V to 36-V digital input receiver with current limiting and LED indication

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Data sheet

ISO1228

ACTIVE
Data sheet Order now

Product details

Rating Catalog Isolation rating Basic Number of channels 8 Forward/reverse channels 8/0 Data rate (max) (Mbps) 1.5 Working isolation voltage (VIOWM) (Vrms) 450 Surge isolation voltage (VIOSM) (VPK) 5000 Transient isolation voltage (VIOTM) (VPK) 4242 Withstand isolation voltage (VISO) (Vrms) 3000 CMTI (min) (kV/µs) 50 Operating temperature range (°C) -40 to 125 Supply voltage (max) (V) 36 Supply voltage (min) (V) 1.71 Propagation delay time (typ) (µs) 0.78
Rating Catalog Isolation rating Basic Number of channels 8 Forward/reverse channels 8/0 Data rate (max) (Mbps) 1.5 Working isolation voltage (VIOWM) (Vrms) 450 Surge isolation voltage (VIOSM) (VPK) 5000 Transient isolation voltage (VIOTM) (VPK) 4242 Withstand isolation voltage (VISO) (Vrms) 3000 CMTI (min) (kV/µs) 50 Operating temperature range (°C) -40 to 125 Supply voltage (max) (V) 36 Supply voltage (min) (V) 1.71 Propagation delay time (typ) (µs) 0.78
SSOP (DFB) 38 59.4 mm² 9.9 x 6
  • Configurable IEC 61131-2 eight Type 1/3 or four Type 2 Isolated Digital Inputs
  • Low Power and Heat Dissipation
    • Selectable input current limit
    • Fieldside LED drivers using input current
  • Configurable sinking or sourcing type inputs
  • Wire-break detection in sink mode
  • Integrated field-side power loss detection
  • Programmable Glitch Filters
  • Built in CRC check across barrier
  • Serial SPI and Parallel output options
    • Supports SPI daisy chaining
    • Supports SPI burst mode
  • Integrated IEC ESD and Surge Protection
  • High CMTI(Typ): 75kV/µs
  • VCC1 Logic supply voltage range: 1.71V to 5.5V
  • AVCC field supply voltage range (sink mode): 8.5V to 36V
  • AVCC field supply voltage range (source mode): 13V to 36V
  • Ambient temperature range: –40°C to 125°C
  • Small Footprint 38-SSOP Package
  • Safety-related certifications:
    • 4242-VPK VIOTM and 637-VPK VIORM per DIN EN IEC 60747-17 (VDE 0884-17)
    • 3000-VRMS Isolation for 1 Minute per UL 1577
    • IEC 62368-1, IEC 61010-1 Certifications
    • All Certifications Planned
  • Configurable IEC 61131-2 eight Type 1/3 or four Type 2 Isolated Digital Inputs
  • Low Power and Heat Dissipation
    • Selectable input current limit
    • Fieldside LED drivers using input current
  • Configurable sinking or sourcing type inputs
  • Wire-break detection in sink mode
  • Integrated field-side power loss detection
  • Programmable Glitch Filters
  • Built in CRC check across barrier
  • Serial SPI and Parallel output options
    • Supports SPI daisy chaining
    • Supports SPI burst mode
  • Integrated IEC ESD and Surge Protection
  • High CMTI(Typ): 75kV/µs
  • VCC1 Logic supply voltage range: 1.71V to 5.5V
  • AVCC field supply voltage range (sink mode): 8.5V to 36V
  • AVCC field supply voltage range (source mode): 13V to 36V
  • Ambient temperature range: –40°C to 125°C
  • Small Footprint 38-SSOP Package
  • Safety-related certifications:
    • 4242-VPK VIOTM and 637-VPK VIORM per DIN EN IEC 60747-17 (VDE 0884-17)
    • 3000-VRMS Isolation for 1 Minute per UL 1577
    • IEC 62368-1, IEC 61010-1 Certifications
    • All Certifications Planned

The ISO1228 is an eight-channel isolated 24V digital input receiver, configurable to IEC 61131-2 Type 1, and 3 characteristics or four-channel Type 2 characteristics. The ISO1228 includes resistor-programmable accurate current limit and field side input-current-powered LED indication to reduce system power dissipation and reduce board temperatures. ISO1228 can be configured for either sourcing or sinking type digital inputs with minimal hardware change. Both serial SPI and parallel output modes are available. Wire-break detection, fieldside supply monitoring and built-in CRC across barriers help improve system reliability. In-built glitch filters and integrated IEC-ESD and surge protection help to achieve a robust design.

The ISO1228 operates over the logic supply range of 1.71V to 5.5V, supporting 1.8V, 2.5-V, 3.3V, and 5V controllers. Field side output voltage range supported is 8.5V to 36V in sink mode and 13V to 36V in source mode.ISO1228 supports up to 1.5Mbps data rates passing a minimum pulse width of 667ns for high-speed operation.

The ISO1228 is an eight-channel isolated 24V digital input receiver, configurable to IEC 61131-2 Type 1, and 3 characteristics or four-channel Type 2 characteristics. The ISO1228 includes resistor-programmable accurate current limit and field side input-current-powered LED indication to reduce system power dissipation and reduce board temperatures. ISO1228 can be configured for either sourcing or sinking type digital inputs with minimal hardware change. Both serial SPI and parallel output modes are available. Wire-break detection, fieldside supply monitoring and built-in CRC across barriers help improve system reliability. In-built glitch filters and integrated IEC-ESD and surge protection help to achieve a robust design.

The ISO1228 operates over the logic supply range of 1.71V to 5.5V, supporting 1.8V, 2.5-V, 3.3V, and 5V controllers. Field side output voltage range supported is 8.5V to 36V in sink mode and 13V to 36V in source mode.ISO1228 supports up to 1.5Mbps data rates passing a minimum pulse width of 667ns for high-speed operation.

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Type Title Date
* Data sheet ISO1228 Eight-Channel Isolated Digital Input with Current Limit and Diagnostics datasheet (Rev. A) PDF | HTML 09 Jan 2024
EVM User's guide ISO1228, ISO1228DFBEVM Eight-Channel Isolated Digital Input with Current Limit PDF | HTML 06 Jul 2023
Certificate ISO1228DFBEVM EU RoHS Declaration of Conformity (DoC) 13 Apr 2023

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