ISO1212DBQR Description

Isolated 24-V to 60-V digital input receivers that meet the requirements of Types 1, 2, and 3 of IEC 61131-2 are the ISO1211 and ISO1212 devices. These devices provide 9-V to 300-V DC and AC digital input modules in programmable logic controllers (PLCs), motor-control, grid infrastructure, and other industrial applications. The ISO121x devices offer a straightforward, low-power alternative to conventional optocoupler solutions with discrete, inaccurate current limiting circuitry, enabling the development of small, dense I/O modules. These devices can be configured as sourcing or sinking inputs and do not require field-side power supply.

The ISO121x devices support 2.5-V, 3.3-V, and 5-V controllers and work throughout a supply voltage range of 2.25 V to 5.5 V. The input pins are protected in case of failures with low reverse current thanks to a 60-V input tolerance with reverse polarity protection. For high-speed operation, these devices pass pulses with a minimum width of 150 ns at data rates of up to 4 Mbps. The ISO1212 device is appropriate for multichannel space-constrained designs, whereas the ISO1211 device is ideal for designs that call for channel-to-channel isolation.

As comparison to conventional solutions, the ISO121x devices minimize the number of components, simplify the design of the system, improve performance, and lower board temperatures.

ISO1212DBQR Features

• Configurable as sourcing or sinking input

• High data rates: up to 4 Mbps

• Enable pin to multiplex output signals

• High transient immunity: ±70-kV/µs CMTI

• Wide supply range (VCC1): 2.25 V to 5.5 V

• Ambient temperature range: –40°C to +125°C

• Compact package options:

– Single-channel ISO1211, SOIC-8

– Dual-channel ISO1212, SSOP-16

• Safety-Related Certifications:

– Basic insulation per DIN VDE V 0884-11

– UL 1577 recognition, 2500-VRMS insulation

– IEC 60950-1, IEC 62368-1, IEC 61010-1 and GB 4943.1-2011 certifications

• Compliant to IEC 61131-2; Type 1, 2, 3 characteristics for 24-V isolated digital inputs

• Supports 9-V to 300-V DC and AC digital input designs using external resistors

• Accurate Current Limit for Low-Power Dissipation:

– 2.2 mA to 2.47 mA for Type 3

– Adjustable up to 6.5 mA

• Eliminates the need for field-side power supply

• High input-voltage range with reverse polarity protection: ±60 V

• Wire-break detection (refer to TIDA-01509)

ISO1212DBQR Applications

• CNC Control

• Data Acquisition

• Binary Input Modules

• Programmable Logic Controller (PLC)

– Digital Input Modules

– Mixed I/O Modules

• Motor Drive I/O and Position Feedback