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LTC2859 データシート(PDF) 3 Page - Linear Technology |
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LTC2859 データシート(HTML) 3 Page - Linear Technology |
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3 / 16 page  LTC2859/LTC2861 3 285961fb The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VCC = 5V unless otherwise noted (Note 2). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Driver |VOD| Differential Driver Output Voltage R = ∞, IO = 0mA, VCC = 4.5V (Figure 1) R = 27Ω (RS485), VCC = 4.5V (Figure 1) R = 50Ω (RS422), VCC = 4.5V (Figure 1) ● ● ● 1.5 2.0 VCC VCC VCC V V V Δ|VOD| Change in Magnitude of Driver Differential Output Voltage for Complementary Output States R = 27Ω or R = 50Ω (Figure 1) ● 0.2 V VOC Driver Common Mode Output Voltage R = 27Ω or R = 50Ω (Figure 1) ● 3.0 V Δ|VOC| Change in Magnitude of Driver Common Mode Output Voltage for Complementary Output States R = 27Ω or R = 50Ω (Figure 1) ● 0.2 V IOZD Driver Three-State (High Impedance) Output Current on Y and Z DE = OV, VO = –7V, +12V (LTC2861 Only) ● ±10 μA IOSD Maximum Driver Short-Circuit Current –7V ≤ (Y or Z) ≤ 12 (Figure 2) ● ±120 ±250 mA Receiver IIN2 Receiver Input Current (A, B) DE = TE = 0V, VCC = 0V or 5V, VA or VB = 12V, Other at 0V ● 125 μA DE = TE = 0V, VCC = 0V or 5V, VA or VB = –7V, Other at 0V ● –100 μA VTH Receiver Differential Input Threshold Voltage –7V ≤ VCM ≤ 12 ● ±0.2 V ΔVTH Receiver Input Hysteresis VCM = 0V 25 mV VOH Receiver Output HIGH Voltage I0 = –4mA, VID = 200mV, VCC = 4.5V ● 2.4 V VOL Receiver Output LOW Voltage I0 = 4mA, VID = –200mV, VCC = 4.5V ● 0.4 V IOZR Receiver Three-State (High Impedance) Output Current on RO RE = 5V, 0V ≤ VO ≤ VCC ● ±1 μA RIN Receiver Input Resistance RE = 5V or 0V, DE = TE = 0V –7V ≤ VA = VB ≤ 12V ● 96 125 kΩ RTERM Receiver Input Terminating Resistor TE = 5V, VAB = 2V, VB = –7, 0, 10V (Figure 7) ● 108 120 156 Ω Logic VIH Logic Input High Voltage DE, DI, RE, TE, SLO, VCC = 4.5V ● 2V VIL Logic Input Low Voltage DE, DI, RE, TE, SLO, VCC = 4.5V ● 0.8 V IIN1 Logic Input Current DE, DI, RE, TE, SLO ● 0±10 μA Supplies ISHDN Supply Current in Shutdown Mode DE = 0V, RE = VCC, TE = 0V ● 05 μA ICCR Supply Current in Receive Mode No Load, DE = 0V, RE = 0V, TE = 0V ● 540 900 μA ICCT Supply Current in Transmit Mode No Load, DE = VCC, RE = VCC, SLO = VCC, TE = 0V ● 630 1000 μA ICCTS Supply Current in Transmit SLO Mode No Load, DE = VCC, RE = VCC, SLO = 0V, TE = 0V ● 670 1100 μA ICCL Supply Current in Loopback Mode (Both Driver and Receiver Enabled) No Load, DE = VCC, RE= 0V, SLO = VCC, TE = 0V ● 660 1100 μA ICCRT Supply Current in Termination Mode DE = 0V, RE = VCC, TE = VCC, SLO = VCC ● 640 1180 μA ELECTRICAL CHARACTERISTICS |
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