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ADM3222ARW Datasheet(PDF) 7 Page - Analog Devices |
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ADM3222ARW Datasheet(HTML) 7 Page - Analog Devices |
7 / 8 page ADM3202/ADM3222/ADM1385 –7– REV. A OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 16-Lead Plastic DIP (N-16) 16 18 9 0.840 (21.34) 0.745 (18.92) 0.280 (7.11) 0.240 (6.10) PIN 1 SEATING PLANE 0.022 (0.558) 0.014 (0.356) 0.060 (1.52) 0.015 (0.38) 0.210 (5.33) MAX 0.130 (3.30) MIN 0.070 (1.77) 0.045 (1.15) 0.100 (2.54) BSC 0.160 (4.06) 0.115 (2.93) 0.325 (8.26) 0.300 (7.62) 0.015 (0.381) 0.008 (0.204) 0.195 (4.95) 0.115 (2.93) 16-Lead Thin Shrink Small Outline (TSSOP) (RU-16) 16 9 8 1 0.201 (5.10) 0.193 (4.90) PIN 1 SEATING PLANE 0.006 (0.15) 0.002 (0.05) 0.0118 (0.30) 0.0075 (0.19) 0.0256 (0.65) BSC 0.0433 (1.10) MAX 0.0079 (0.20) 0.0035 (0.090) 0.028 (0.70) 0.020 (0.50) 8° 0° 16-Lead Narrow Body SOIC (R-16A) 16 9 8 1 0.3937 (10.00) 0.3859 (9.80) 0.2440 (6.20) 0.2284 (5.80) 0.1574 (4.00) 0.1497 (3.80) PIN 1 SEATING PLANE 0.0098 (0.25) 0.0040 (0.10) 0.0192 (0.49) 0.0138 (0.35) 0.0688 (1.75) 0.0532 (1.35) 0.0500 (1.27) BSC 0.0099 (0.25) 0.0075 (0.19) 0.0500 (1.27) 0.0160 (0.41) 8 0 0.0196 (0.50) 0.0099 (0.25) x 45 16-Lead Wide Body SOIC (R-16) 16 9 8 1 0.4133 (10.50) 0.3977 (10.00) PIN 1 SEATING PLANE 0.0118 (0.30) 0.0040 (0.10) 0.0192 (0.49) 0.0138 (0.35) 0.1043 (2.65) 0.0926 (2.35) 0.0500 (1.27) BSC 0.0125 (0.32) 0.0091 (0.23) 0.0500 (1.27) 0.0157 (0.40) 0.0291 (0.74) 0.0098 (0.25) x 45 8 0 C1 + C3 + S3 S4 S1 S2 INTERNAL OSCILLATOR VCC GND VCC V+ = 2VCC Figure 9. Charge Pump Voltage Doubler C2 + C4 + S3 S4 S1 S2 INTERNAL OSCILLATOR V+ GND V– = –(V+) GND FROM VOLTAGE DOUBLER Figure 10. Charge Pump Voltage Inverter Transmitter (Driver) Section The drivers convert 3.3 V logic input levels into RS-232 output levels. With VCC = +3.3 V and driving an RS-232 load, the output voltage swing is typically ±6 V. Receiver Section The receivers are inverting level-shifters that accept RS-232 input levels and translate them into 3 V logic output levels. The inputs have internal 5 k Ω pull-down resistors to ground and are also protected against overvoltages of up to ±30 V. Uncon- nected inputs are pulled to 0 V by the internal 5 k Ω pull-down resistor. This, therefore, results in a Logic 1 output level for unconnected inputs or for inputs connected to GND. The receivers have Schmitt trigger inputs with a hysteresis level of 0.4 V. This ensures error-free reception for both noisy inputs and for inputs with slow transition times. HIGH BAUD RATE The ADM3202E/ADM3222E feature high slew rates permitting data transmission at rates well in excess of the EIA/RS-232E specifications. RS-232 voltage levels are maintained at data rates up to 460 kbps even under worst case loading conditions. This allows for high speed data links between two terminals or indeed it is suitable for the new generation ISDN modem standards which requires data rates of 230 kbps. The slew rate is internally con- trolled to less than 30 V/ µs in order to minimize EMI interference. |
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