поискавой системы для электроныых деталей |
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HCPL-4100 датащи(PDF) 10 Page - Agilent(Hewlett-Packard) |
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HCPL-4100 датащи(HTML) 10 Page - Agilent(Hewlett-Packard) |
10 / 12 page 1-370 Figure 12. Recommended Non-Isolated Active Receiver with HCPL-4100 Isolated Transmitter for Simplex Point to Point 20 mA Current Loop. 25% distortion data rate at different VCC values. 25% distortion data rate is defined as that rate at which 25% distortion occurs to output bit interval with respect to the input bit interval. Maximum data rate (dotted line) is restricted by device character- istics. An input Non-Return-to- Zero (NRZ) test waveform of 16 bits (0000001011111101) was used for data rate distortion measurements. Enhanced speed performance of the loop system can be obtained with lower VCC supply levels, as illustrated in Figure 14. In addition, when loop current is supplied through a resistor instead of by a current source, an additional series termination resistance equal to the characteristic line impedance can be used at the HCPL-4100 transmitter end to enhance speed of response by approximately 20%. The cable used contained five pairs of unshielded, twisted, 22 AWG wire (Dearborn #862205). Loop current is 20 mA nominal. Input and output logic supply voltages are 5 V dc. Full Duplex The full duplex point-to-point communication of Figure 15 uses a four wire system to provide simultaneous, bidirectional data communication between local and remote equipment. The basic application uses two simplex point-to-point loops which have two separate, active, non-isolated units at one common end of the loops. The other end of each loop is isolated. Figure 13. Minimum Required Supply Voltage, VCC, vs. Loop Length for Current Loop Circuit of Figure 13. Figure 14. Typical Data Rate vs. Distance and Supply Voltage. 0 12 0 L – LOOP LENGTH (ONE DIRECTION) METERS 100 1000 16 4 28 32 36 40 10000 m VCC = 0.00212 — (L) + 5.7 V RCABLE = 0.05296 Ω/m ILOOP = 20 mA VMARK = 2.7 Vdc (HCPL-4100) VSAT = 1.5 Vdc (CURRENT SOURCE) TA = 25 °C V 24 20 8 |
Аналогичный номер детали - HCPL-4100 |
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Аналогичное описание - HCPL-4100 |
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