The ISO121x devices receive 24-V to 60-V digital input signals and provide isolated digital outputs. An external resistor, RSENSE, connected between the INx and SENSEx pins, sets the limit for the current drawn from the field input. Internal voltage comparators connected to the SENSEx pins determine the input-voltage transition thresholds.
The output buffers on the control side are capable of providing enough current to drive status LEDs. The EN pin is used to enable the output buffers. A low state on the EN pin puts the output buffers in a high-impedance state.
The ISO121x devices are capable of operating up to 4 Mbps. Both devices support an isolation withstand voltage of 2500 VRMS between side 1 and side 2. Table 1 provides an overview of the device features.
|PART NUMBER||CHANNELS||MAXIMUM DATA RATE||PACKAGE||RATED ISOLATION|
|ISO1211||1||4 Mbps||8-pin SOIC (D)||2500 VRMS,
|ISO1212||2||4 Mbps||16-pin SSOP (DBQ)||2500 VRMS,