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ADM488ABRMZ Arkusz danych(PDF) 3 Page - Analog Devices |
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ADM488ABRMZ Arkusz danych(HTML) 3 Page - Analog Devices |
3 / 16 page ADM488A/ADM489A Rev. 0 | Page 3 of 16 SPECIFICATIONS VCC = 5 V ± 10%; all specifications TMIN to TMAX, unless otherwise noted. Table 1. Parameter Symbol Min Typ Max Unit Test Conditions/Comments DRIVER Differential Output Voltage VOD 5.0 V R = ∞, see Figure 11 2.0 5.0 V VCC = 5 V, R = 50 Ω (RS-422), see Figure 11 1.5 5.0 V R = 27 Ω (RS-485), see Figure 11 1.5 5.0 V VTST = –7 V to +12 V, see Figure 12, VCC = 5 V ± 5% Δ|VOD| for Complementary Output States 0.2 V R = 27 Ω or 50 Ω, see Figure 11 Common-Mode Output Voltage VOC 3.0 V R = 27 Ω or 50 Ω, see Figure 11 Δ|VOC| for Complementary Output States 0.2 V R = 27 Ω or 50 Ω Output Short-Circuit Current VOUT 250 mA −7 V ≤ VO ≤ +12 V CMOS Input Logic Threshold Low VINL 1.4 0.8 V CMOS Input Logic Threshold High VINH 2.0 1.4 V Logic Input Current (DE, DI) ±1.0 μA RECEIVER Differential Input Threshold Voltage VTH −0.2 +0.2 V −7 V ≤ VCM ≤ +12 V Input Voltage Hysteresis ΔVTH 70 mV VCM = 0 V Input Resistance 12 kΩ −7 V ≤ VCM ≤ +12 V Input Current (A, B) 1 mA VIN = 12 V −0.8 mA VIN = −7 V Logic Enable Input Current (RE) ±1 μA CMOS Output Voltage Low VOL 0.4 V IOUT = +4.0 mA CMOS Output Voltage High VOH 4.0 V IOUT = −4.0 mA Short-Circuit Output Current 7 85 mA VOUT = GND or VCC Three-State Output Leakage Current ±1.0 μA 0.4 V ≤ VOUT ≤ 2.4 V POWER SUPPLY CURRENT ICC Outputs unloaded, receivers enabled 30 60 μA DE = 0 V (disabled) 37 74 μA DE = 5 V (enabled) |
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