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ADM2486 Fiches technique(PDF) 3 Page - Analog Devices |
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ADM2486 Fiches technique(HTML) 3 Page - Analog Devices |
3 / 20 page ADM2486 Rev. C | Page 3 of 20 SPECIFICATIONS 2.7 V ≤ VDD1 ≤ 5.5 V, 4.75 V ≤ VDD2 ≤ 5.25 V, TA = TMIN to TMAX, unless otherwise noted. Table 1. Parameter Min Typ Max Unit Test Conditions/Comments DRIVER Differential Outputs Differential Output Voltage, VOD 5 V R = ∞, see Figure 3 2.1 5 V R = 50 Ω (RS-422), see Figure 3 2.1 5 V R = 27 Ω (RS-485), see Figure 3 2.1 5 V VTST = −7 V to 12 V, VDD1 ≥ 4.7, see Figure 4 ∆ |VOD| for Complementary Output States 0.2 V R = 27 Ω or 50 Ω, see Figure 3 Common-Mode Output Voltage, VOC 3 V R = 27 Ω or 50 Ω, see Figure 3 ∆ |VOC| for Complementary Output States 0.2 V R = 27 Ω or 50 Ω, see Figure 3 Output Short-Circuit Current, VOUT = High 60 200 mA −7 V ≤ VOUT ≤ +12 V Output Short-Circuit Current, VOUT = Low 60 200 mA −7 V ≤ VOUT ≤ +12 V Bus Enable Output Output High Voltage VDD2 − 0.1 V IODE = 20 µA VDD2 − 0.3 VDD2 − 0.1 V IODE = 1.6 mA VDD2 − 0.4 VDD2 − 0.2 V IODE = 4 mA Output Low Voltage 0.1 V IODE = −20 µA 0.1 0.3 V IODE = −1.6 mA 0.2 0.4 V IODE = −4 mA Logic Inputs Input High Voltage 0.7 VDD1 V TxD, RTS, RE, PV Input Low Voltage 0.25 VDD1 V TxD, RTS, RE, PV CMOS Logic Input Current (TxD, RTS, RE, PV) −10 0.01 10 µA TxD, RTS, RE, PV = VDD1 or 0 V RECEIVER Differential Inputs Differential Input Threshold Voltage, VTH −200 200 mV −7 V ≤ VCM ≤ +12V Input Hysteresis 70 mV −7 V ≤ VCM ≤ +12V Input Resistance (A, B) 20 30 kΩ −7 V ≤ VCM ≤ +12V Input Current (A, B) 0.6 mA VIN = +12 V −0.35 mA VIN = −7 V RxD Logic Output Output High Voltage VDD1 − 0.1 V IOUT = 20 µA, VA − VB = 0.2 V VDD1 − 0.4 VDD1 − 0.2 V IOUT = 4 mA, VA − VB = 0.2 V Output Low Voltage 0.1 V IOUT = −20 µA, VA − VB = −0.2 V 0.2 0.4 V IOUT = −4 mA, VA − VB = −0.2 V Output Short-Circuit Current 7 85 mA VOUT = GND or VCC Three-State Output Leakage Current ±1 µA 0.4 V ≤ VOUT ≤ 2.4 V |
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