Datenblatt-Suchmaschine für elektronische Bauteile |
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AD261BND-0 Datenblatt(PDF) 6 Page - Analog Devices |
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AD261BND-0 Datenblatt(HTML) 6 Page - Analog Devices |
6 / 6 page AD261 –6– REV. 0 BUFFER DELAY LINE BUFFER 14ns 100 5pF OUTPUT CAPACITANCE TOTAL DELAY = t PD t rr = 13ns (NO LOAD), 18ns (50pF LOAD) t ff t rr = tff = 100 x CTOTAL OUTPUT CAPACITANCE 0.5ns – NO LOAD = 5.5ns INTO 50pF 5pF INPUT CAPACITANCE EFFECTIVE CIRCUIT MODEL 37% 63% OUTPUT INPUT POSITIVE GOING INPUT THRESHOLD NEGATIVE GOING INPUT THRESHOLD HYSTERESIS PROPAGATION DELAY t PD = 14ns Figure 2. Typical Timing and Delay Models 22-Pin Plastic DIP (ND-22A) BOTTOM VIEW SYSTEM FIELD 0.738* (18.75) 0.650 (16.51) 0.250 (6.35) 0.050 (1.27) PIN 1 0.075 (1.91) SIDE VIEW 22 1 8 15 1.500 (38.1) MAX 0.050 (1.27) 0.160 (4.06) 0.140 (3.56) 0.020 0.010 (0.508 0.254) 16 PLACES 0.100 (2.54) 0.550 (13.97) MAX 0.440 (11.18) MAX END VIEW 0.350 (8.89) *CREEPAGE PATH (SUBTRACT APPROXIMATELY 0.079 (2mm) FOR SOLDER PAD RADII ON PC BOARD. THIS SPACING SUPPORTS THE INTRINSICALLY SAFE RATING OF 750V. OUTLINE DIMENSIONS Dimensions shown in inches and (mm). Logic information is sent across the barrier as “set-hi/set-lo” data that is derived from logic level transitions of the input. At power-up or after a fault condition, an output might not repre- sent the state of the respective channel input to the isolator. An internal circuit operates in the background which interrogates all inputs about every 5 µs and in the absence of logic transi- tions, sends appropriate “set-hi” or “set-lo” data across the barrier. Recovery time from a fault condition or at power-up is thus between 5 µs and 10 µs. DRIVER DATA RECEIVER OUTPUT BUFFER GATED TRANSPARENT LATCH SCHMITT TRIGGER BUFFER CONTINUOUS UPDATE CIRCUIT 3.5kV ISOLATION BARRIER DATA IN ENABLE ENABLE OUT DQ G Figure 1. Simplified Block Diagram |
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