LTC1535 Linear Technology, LTC1535 Datasheet
LTC1535
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LTC1535 Summary of contents
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... BAT54C ST1 ST2 GND2 400kHz R D FLOATING RS485 COMMON ** TRANSFORMER COILTRONICS (561) 241-7876 2 Final Electrical Specifications LTC1535 August 1999 U 1535 is an isolated RS485 full-duplex differential of isolation between the line RMS receiver input 14 V CC2 A 16 TWISTED-PAIR CABLE B 15 RO2 ...
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... – 4mA 4. –10mA 4. 4mA 4. 10mA 4. TOP VIEW ORDER PART NUMBER LTC1535CSW SLO 17 RO2 125 C unless otherwise noted. CC2 MIN TYP MAX 4.5 5.5 4.5 7 ...
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... SLO = 1, Figure 4, Figure SLO = 1, Figure 4, Figure SLO = 1, Figure 4, Figure Figure 2, Figure Figure 2, Figure Figure 2, Figure Figure 2, Figure Figure 2, Figure 7 Figure 2, Figure 8 Figure 2, Figure 8 Note 9 Note 9 LTC1535 = 5V unless otherwise noted. CC2 MIN TYP MAX UNITS 1 3.7 3.9 3.4 0.4 ...
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... LTC1535 ELECTRICAL CHARACTERISTICS Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: RS422 50 specification based on RS485 27 test. Note tested 5V, guaranteed by design from IN CC2 V = GND2 5.25V. CC2 Note 4: Input fault conditions on the RS485 receiver are detected with a fixed receiver offset ...
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... POWER SIDE ISOLATED SIDE 1 1 ST2 GND2 400kHz ENCODE EN DECODE EN FAULT RECEIVER OUTPUT UNDER TEST C L2 1535 F03 LTC1535 14 V CC2 RO2 SLO 1535 BD S1 TEST POINT 1535 F02 Figure 2. Receiver Timing Test Load ...
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... LTC1535 U W SWITCHI WAVEFOR – OD2 A – B –V OD2 3V 1. 10ns, t 10ns 1. PLH 80 V(Y) – V(Z) DIFF 20 Figure 5. Driver Propagation Delays ...
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... U U APPLICATIO S I FOR ATIO Isolation Barrier and Sampled Communication The LTC1535 uses the SW-28 isolated lead frame package to provide capacitive isolation barrier between the logic interface and the RS485 driver/receiver pair. The barrier provides 2500V of isolation. Communication between RMS the two sides uses the isolation capacitors in a multiplexed way to communicate full-duplex data across this barrier ...
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... U APPLICATIO S I FOR ATIO Driver Output and Slow Slew Rate Control The LTC1535 uses a proprietary driver output stage that allows a common mode voltage range that extends be- yond the power supplies. Thus, the high impedance state is maintained over the full RS485 common mode range. ...
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... U U APPLICATIO S I FOR ATIO High Voltage Considerations The LTC1535 eliminates ground loops on data communi- cation lines. However, such isolation can bring potentially dangerous voltages onto the circuit board. An example would be accidental faulting to 117V AC at some point on the cable which is then conducted to the PC board. ...
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... LTC1535 U U APPLICATIO S I FOR ATIO DI Y–Z Figure 12. Driver Propagation Delay with Sample Jitter. SLO = Figure 14. Driver Output Y–Z Figure 16. Driver Differential Output 5V, SLO = V CC2 Y–Z CC2 5V, SLO = V Figure 15. Driver Output ...
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... DWG # 05-08-1690 NOTE 0.093 – 0.104 (2.362 – 2.642) 0 – 8 TYP 0.050 (1.270) BSC LTC1535 0.697 – 0.712* (17.70 – 18.08 0.394 – 0.419 (10.007 – 10.643 0.037 – 0.045 (0.940 – 1.143) 0.004 – 0.012 (0.102 – ...
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... LTC1535 U TYPICAL APPLICATIO 2 ST1 GND 4 1 LOGIC COMMON 1 RELATED PARTS PART NUMBER DESCRIPTION LTC1177 Isolated MOSFET Driver LT1424-5 Isolated Flyback Switching Regulator LTC1485 High Speed RS485 Transceiver LTC1531 Self-Powered Isolated Comparator ...