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ADM2485 데이터시트(PDF) 3 Page - Analog Devices |
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ADM2485 데이터시트(HTML) 3 Page - Analog Devices |
3 / 15 page Preliminary Technical Data ADM2485 Parameter Min Typ Max Unit Test Conditions/Comments POWER SUPPLY CURRENT Logic Side Bus Side 1.0 4.0 2.1 43.0 58.0 1.3 0.8 1.1 3.0 mA mA mA mA mA mA mA mA mA RTS = 0 V, VDD1 = 5.5 V 2 Mbps, VDD1 = 5.5 V, Figure 5 16 Mbps, VDD1 = 5.5 V, Figure 5 RTS = 0 V, VDD1 = 3 V 2 Mbps, VDD1 = 3 V, Figure 5 16 Mbps, VDD1 = 3 V, Figure 5 RTS = 0 V 2 Mbps, RTS = VDD1, Figure 5 16 Mbps, RTS = VDD1, Figure 5 COMMON-MODE TRANSIENT IMMUNITY1 25 kV/µs VCM = 1 kV, Transient Magnitude = 800 V HIGH FREQUENCY COMMON-MODE NOISE IMMUNITY 100 mV VHF = +5V, −2 V < VTEST2 < 7 V, 1 < fTEST < 50 MHz, Figure 6 1 CM is the maximum common-mode voltage slew rate that can be sustained while maintaining specification-compliant operation. VCM is the common-mode potential difference between the logic and bus sides. The transient magnitude is the range over which the common-mode is slewed. The common-mode voltage slew rates apply to both rising and falling common-mode voltage edges. TIMING SPECIFICATIONS 2.7 ≤ VDD1 ≤ 5.5 V, 4.75 V ≤ VDD2 ≤ 5.25 V, TA = TMIN to TMAX, unless otherwise noted. Table 2. Parameter Min Typ Max Unit Test Conditions/Comments DRIVER Maximum Data Rate 16 Mbps Propagation Delay Input to Output 25 45 55 ns RLDIFF = 54 Ω, CL1 = CL2 = 100 pF; See Figure 7. tPLH, tPHL RTS-to-DE Propagation Delay 20 35 55 ns See Figure 8. Driver O/P to O/P tSKEW 2 5 ns RLDIFF = 54 Ω, CL1 = CL2 = 100 pF; See Figure 7 and Figure 12. Rise/Fall Time tR, tF 5 15 ns RLDIFF = 54 Ω, CL1 = CL2 = 100 pF; See Figure 7 and Figure 12. Enable Time 43 53 ns See Figure 9 and Figure 14. Disable Time 43 55 ns See Figure 9 and Figure 14. Enable Skew, |tAZH-tBZL|, |tAZL-tBZH| 1 3 ns See Figure 9 and Figure 14. Disable Skew, |tAHZ-tBLZ|, |tALZ-tBHZ| 2 5 ns See Figure 9 and Figure 14. RECEIVER Propagation Delay tPLH, tPHL 25 45 55 ns CL = 15 pF; See Figure 10 and Figure 13. Differential Skew tSKEW 5 ns CL = 15 pF; See Figure 10 and Figure 13. Enable Time 3 13 ns RL = 1 k Ω, CL = 15 pF; See Figure 11 and Figure 15. Disable Time 3 13 ns RL = 1 k Ω, CL = 15 pF; See Figure 11 and Figure 15. Rev. PrK | Page 3 of 15 |
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