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ADM222AN Folha de dados(PDF) 2 Page - Analog Devices |
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ADM222AN Folha de dados(HTML) 2 Page - Analog Devices |
2 / 9 page REV. 0 –2– Parameter Min Typ Max Units Test Conditions/Comments RS-232 TRANSMITTERS Output Voltage Swing ±5 ±9 V All Transmitter Outputs Loaded with 3 k Ω to Ground Input Logic Threshold Low, V INL 1.4 0.8 V T IN Input Logic Threshold High, V INH 2.0 1.4 V T IN Logic Pullup Current 5 40 µAT IN = 0 V Data Rate 200 kB/s Output Resistance 300 Ω V CC = V+ = V– = 0 V, VOUT = ± 2 V Output Short Circuit Current (Instantaneous) ±7 ±22 mA RS-232 RECEIVERS RS-232 Input Voltage Range –30 +30 V RS-232 Input Threshold Low 0.8 1.3 V RS-232 Input Threshold High 1.8 2.4 V RS-232 Input Hysteresis 0.2 0.5 1.0 V V CC = 5 V RS-232 Input Resistance 357k Ω TTL/CMOS Output Voltage Low, V OL 0.2 0.4 V I OUT = 3.2 mA TTL/CMOS Output Voltage High, V OH 3.5 V I OUT = –1.0 mA TTL/CMOS Output Short-Circuit Current –2 –10 mA Source Current (V OUT = GND) TTL/CMOS Output Short-Circuit Current 10 30 mA Sink Current (V OUT = VCC) TTL/CMOS Output Leakage Current ±0.05 ±10 µA SHDN = GND/EN = V CC 0 V ≤ V OUT ≤ VCC EN Input Threshold Low, V INL 1.4 0.8 V EN Input Threshold High, V INH 2.0 1.4 V POWER SUPPLY Power Supply Current 4 8 mA No Load 15 mA 3 k Ω Load on Both Outputs Shutdown Power Supply Current 0.1 10 µA SHDN Input Leakage Current ±1 µA SHDN Input Threshold Low, V INL 1.4 0.8 V SHDN Input Threshold High, V INH 2.0 1.4 V AC CHARACTERISTICS Transition Region Slew Rate 6 12 30 V/ µsC L = 50 pF to 2500 pF, R L = 3 kΩ to 7 k Ω Measured from +3 V to –3 V or –3 V to +3 V Transmitter Propagation Delay TTL to RS-232 0.7 3.5 µst PHLT 0.7 3.5 µst PLHT Receiver Propagation Delay RS-232 to TTL 0.2 0.5 µst PHLR 0.3 0.5 µst PLHR Receiver Output Enable Time 125 500 ns t ER Receiver Output Disable Time 160 500 ns t DR Transmitter Output Enable Time 250 µs SHDN Goes high Transmitter Output Disable Time 3.5 µs SHDN Goes low Transmitter + to – Propagation Delay Difference 300 ns Receiver + to – Propagation Delay Difference 100 ns Specifications subject to change without notice. ADM222/ADM232A/ADM242–SPECIFICATIONS (V CC= +5 V ± 10%, C1–C4 = 0.1 µF; all spec- ifications T MIN to TMAX unless otherwise noted.) |
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