VIA2000SD www.vishay.com Vishay Semiconductors Axis Title 300 10000 250 ) A (m 200 1000 rrent u ne ne ine C 150 ng 1st li iti 2nd li 2nd l m 100 100 Li fety a S 50 0 10 0 50 100 150 200 T - Ambient Temperature (°C) amb Fig. 14 - VIA2000SD Thermal Derating Curve, Dependence of Safety Limiting Values With Case Temperature per DIN VOE V0884-11 FUNCTION DESCRIPTION Overview The VIA2000SD is a high performance isolated amplifier with a high input impedance that accept wide range single-ended input. The singled-ended input is suited to bus voltage monitoring in high voltage applications where isolation is required. The analog input is continuously sampled by a second-order Σ - Δ modulator in the device. With the internal voltage reference and clock generator, the modulator convert the analog input signal to a digital bitstream. The output of the modulator is transferred by the drivers (called TX in the functional block diagram) across the isolation barrier that separates the isolated side 1 and side 2 voltage. The received bitstream and clock are synchronized and processed, as shown in the functional block diagram, by a fourth-order analog filter on the side 2 and has a differential output. SHTDN pin is used to disable the conversion. Since SHTDN is an active high signal and is pulled up by a 100 kΩ (typical) internally, it should be connected to GND1 or logic low in normal operation. V V DD1 DD2 V detection DD1 Reference Reference Retiming and 4th - OUTP V Buffer Σ-Δ modulator TX RX order active IN low pass OUTN filter Isolation Barrier SHTDN RX TX Oscillator GND GND 1 2 Fig. 15 - Function Block Diagram Rev. 1.1, 02-Apr-2025 8 Document Number: 80902 For technical questions, contact: optocoupleranswers@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
