rated current the resistor values should be selected for input currents of 16pARMS. Referring to figure 8, the resistors Rl and R2 0n current channel l, resistors R3 and R4 0n current channe12 and resistors R5 and R6 0n currentchannel 3,define the currentlevelinto the current sense inputs of the SA2005P. The current sense inputs saturates at an input current of +25pA peak. Resistors R29, R30 and R31 are used as current transformer termination resistors. The voltage drop across the termination resistors should be at least 20mV at rated conditions. Values for the current sense inputs are calculated as follows:
N74F7111DTR N74F7111DTR N74F7111DTR Price| | | LC36128ML | |
| Paramemr | Symbol | ·70 | -85 | | 0 | Unit |
| min | max | min | max | min | max |
| Read cyde Dme | tRC | 70 | | 85 | | 100 | | ns |
| Address access time | tAA | | 70 | | 85 | | 100 | ns |
| CE access time | ICA | | 70 | | 85 | | 100 | ns |
| OE accass time | tOA | | 35 | | 45 | | 50 | ns |
| Output hold time | cH | 20 | | 20 | | 20 | | ns |
| CE output enable time | cOE | 10 | | 10 | | 10 | | ns |
| OE ouiput enabla Iima | IOOE | 5 | | 5 | | 5 | | ns |
| CE oLrtpur disable time | Lcoo | O | 30 | 0 | 30 | O | 30 | ns |
| OE output disable iime | 000 | O | 30 | 0 | 30 | O | 30 | ns |
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