ISO71XXDBQ-EVM

The ISO71XXDBQ-EVM comes with the ISO7131CCDBQ device soldered down. The user can remove this device and solder down any one of the four channel ISO714XCCDBQ devices. This EVM allows the user to evaluate the isolator performance and parameters. The ISO71xx digital isolators have a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier. Used with isolated power supplies, these devices block high voltage, isolate grounds, and prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. A binary input signal is conditioned, translated to a balanced signal, and then differentiated by the capacitive isolation barrier. Across the isolation barrier, a differential comparator receives the logic transition information, then sets or resets a flip flop and the output circuit accordingly. A periodic update pulse is sent across the barrier to ensure the proper dc level of the output.