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LTC491 Fiches technique(PDF) 2 Page - Linear Technology |
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LTC491 Fiches technique(HTML) 2 Page - Linear Technology |
2 / 12 page LTC491 2 A G A U A R BSOLUTEXI TI S PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER LTC491CN LTC491CS LTC491IN LTC491IS (Note 1) Supply Voltage (VCC) ............................................... 12V Control Input Voltages ..................... –0.5V to VCC +0.5V Control Input Currents .......................... –50mA to 50mA Driver Input Voltages ....................... –0.5V to VCC +0.5V Driver Input Currents ............................ –25mA to 25mA Driver Output Voltages .......................................... ±14V Receiver Input Voltages ......................................... ±14V Receiver Output Voltages ................ –0.5V to VCC +0.5V Operating Temperature Range LTC491C.................................................. 0 °C to 70°C LTC491I.............................................. – 40 °C to 85°C Storage Temperature Range ................. – 65 °C to 150°C Lead Temperature (Soldering, 10 sec.)................. 300 °C 14 13 12 11 10 9 8 7 6 5 4 3 2 1 TOP VIEW S PACKAGE 14-LEAD PLASTIC SOIC NC N PACKAGE 14-LEAD PLASTIC DIP Y NC Z B NC VCC D GND GND R REB DE LTC491 • POI01 A R D Consult factory for Military grade parts. ELECTRICAL C C HARA TERISTICS C D VCC = 5V ±5% SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOD1 Differential Driver Output Voltage (Unloaded) IO = 0 q 5V VOD2 Differential Driver Output Voltage (With load) R = 50 Ω; (RS422) q 2V R = 27 Ω; (RS485) (Figure 1) q 1.5 5 V ∆VOD Change in Magnitude of Driver Differential Output R = 27 Ω or R = 50Ω (Figure 1) q 0.2 V Voltage for Complementary Output States VOC Driver Common Mode Output Voltage q 3V ∆ VOC Change in Magnitude of Driver Common Mode q 0.2 V Output Voltage for Complementary Output States VIH Input High Voltage D, DE, REB q 2.0 V VIL Input Low Voltage q 0.8 V lIN1 Input Current q ±2 µA lIN2 Input Current (A, B) VCC = 0V or 5.25V VIN = 12V q 1.0 mA VIN = –7V q – 0.8 mA VTH Differential Input Threshold Voltage for Receiver – 7V ≤ VCM ≤ 12V q – 0.2 0.2 V ∆VTH Receiver Input Hysteresis VCM = 0V q 70 mV VOH Receiver Output High Voltage IO = –4mA, VID = 0.2V q 3.5 V VOL Receiver Output Low Voltage IO = 4mA, VID = –0.2V q 0.4 V IOZR Three-State Output Current at Receiver VCC = Max 0.4V ≤ VO ≤ 2.4V q ±1 µA ICC Supply Current No Load; D = GND, Outputs Enabled q 300 500 µA or VCC Outputs Disabled q 300 500 µA RIN Receiver Input Resistance – 7V ≤ VCM ≤ 12V q 12 k Ω IOSD1 Driver Short Circuit Current, VOUT = High VO = –7V q 100 250 mA IOSD2 Driver Short Circuit Current, VOUT = Low VO = 12V q 100 250 mA IOSR Receiver Short Circuit Current 0V ≤ VO ≤ VCC q 785 mA IOZ Driver Three-State Output Current VO = – 7V to 12V q ±2 ±200 µA |
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