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ADM1491EBRZ Datasheet(PDF) 4 Page - Analog Devices |
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ADM1491EBRZ Datasheet(HTML) 4 Page - Analog Devices |
4 / 16 page ADM1491E Rev. 0 | Page 4 of 16 TIMING SPECIFICATIONS TA = −40°C to +85°C. Table 2. Parameter Symbol Min Typ Max Unit Test Conditions DRIVER Maximum Data Rate 16 Mbps Propagation Delay tDPLH, tDPHL 11 17 ns RL = 54 Ω, CL = 100 pF, see Figure 21 and Figure 2 Driver Output Skew tSKEW 0.5 2 ns RL = 54 Ω, CL = 100 pF, see Figure 21 and Figure 2, tSKEW = |tDPLH − tDPHL| Rise Time/Fall Time tDR, tDF 8 15 ns RL = 54 Ω, CL = 100 pF, see Figure 21 and Figure 2 Enable Time tZH, tZL 20 ns RL = 110 Ω, CL = 50 pF, see Figure 22 and Figure 4 Disable Time tHZ, tLZ 20 ns RL = 110 Ω, CL = 50 pF, see Figure 22 and Figure 4 RECEIVER Propagation Delay tPLH, tPHL 12 20 ns CL = 15 pF, see Figure 23 and Figure 3 Skew |tPLH − tPHL| tSKEW 0.4 2 ns CL = 15 pF, see Figure 23 and Figure 3 Enable Time tZH, tZL 13 ns RL = 1 kΩ, CL = 15 pF, see Figure 24 and Figure 5 Disable Time tHZ, tLZ 13 ns RL = 1 kΩ, CL = 15 pF, see Figure 24 and Figure 5 Timing Diagrams Switching Characteristics DE Y, Z Y, Z VCC 0V 0V VOL VOH 0.5VCC 0.5VCC tZL tLZ tZH tHZ VOL + 0.5V VOH – 0.5V 2.3V 2.3V Z Y VCC/2 VCC/2 tDPLH tDPHL 1/2VO VO 90% POINT 10% POINT 10% POINT 90% POINT VDIFF = V(Y) – V(Z) tDR tDF –VO VDIFF +VO 0V VCC Figure 4. Driver Enable/Disable Timing Figure 2. Driver Propagation Delay Rise/Fall Timing A – B RO 0V 0V 1.5V 1.5V VOH VOL tPLH tPHL tSKEW =|tPLH – tPHL| OUTPUT LOW OUTPUT HIGH 1.5V 1.5V RO RO RE 0V 0.7VCC 0.3VCC VOL VOH 0.5VCC 0.5VCC tZL tLZ tZH tHZ VOL + 0.5V VOH –0.5V Figure 5. Receiver Enable/Disable Timing Figure 3. Receiver Propagation Delay Timing |
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