ISO1228DFBR
ActiveEIGHT-CHANNEL ISOLATED 24-V TO 36-V DIGITAL INPUT RECEIVER WITH CURRENT LIMITING AND LED INDICATION
ISO1228DFBR
ActiveEIGHT-CHANNEL ISOLATED 24-V TO 36-V DIGITAL INPUT RECEIVER WITH CURRENT LIMITING AND LED INDICATION
Description
General part information
ISO1228 Series
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.
Technical Specifications
Parameters and characteristics for this part
| Specification | ISO1228DFBR |
|---|---|
| Channel Type | Unidirectional |
| Common Mode Transient Immunity (Min) | 50 kV/µs |
| Data Rate | 1.5 Mbps |
| Fall Time (Typ) | 9 ns |
| Inputs - Side 1 | 8 |
| Inputs - Side 2 | 0 |
| Isolated Power | Yes |
| Mounting Type | Surface Mount |
| Number of Channels | 8 |
| Operating Temperature (Max) | 125 °C |
| Operating Temperature (Min) | -40 °C |
| Package Length | 0.154 in |
| Package Name | 38-SSOP, 38-FSOP |
| Package Width | 3.9 mm |
| Propagation Delay tpHL (Max) | 900 ns |
| Propagation Delay tpLH (Max) | 780 ns |
| Rise Time (Typ) | 9 ns |
| Technology | Capacitive Coupling |
| Type | SPI |
| Voltage - Isolation | 3 kV |
| Voltage - Supply (Maximum) | 5.5 V |
| Voltage - Supply (Minimum) | 1.71 V |
Pricing
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