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ADM213EARS Scheda tecnica(PDF) 6 Page - Analog Devices |
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ADM213EARS Scheda tecnica(HTML) 6 Page - Analog Devices |
6 / 16 page ADM206E/ADM207E/ADM208E/ADM211E/ADM213E REV. B –6– 14 13 12 11 10 9 8 1 2 3 4 7 6 5 17 16 15 20 19 18 28 27 26 25 24 23 22 21 TOP VIEW (Not to Scale) ADM213E T3OUT R3OUT R3IN T4OUT T1OUT T2OUT R2IN R4OUT* R4IN* R2OUT T2IN T1IN R1OUT R1IN GND R5OUT* T3IN T4IN VCC C1+ V+ C1– R5IN* C2+ C2– V– EN *ACTIVE IN SHUTDOWN SHDN Figure 9. ADM213E Pin Configuration PIN FUNCTION DESCRIPTIONS Mnemonic Function VCC Power Supply Input: +5 V ± 10%. V+ Internally Generated Positive Supply (+9 V nominal). V– Internally Generated Negative Supply (–9 V nominal). GND Ground Pin. Must Be Connected to 0 V. C1+, C1– External Capacitor 1 is connected between these pins. 0.1 µF capacitor is recommended but larger capacitors up to 47 µF may be used. C2+, C2– External Capacitor 2 is connected between these pins. 0.1 µF capacitor is recommended but larger capacitors up to 47 µF may be used. TIN Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels. An internal 400 k Ω pull-up resistor to V CC is connected on each input. TOUT Transmitter (Driver) Outputs. These are RS-232 signal levels (Typically ±9 V). RIN Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 k Ω pull-down resistor to GND is connected on each input. ROUT Receiver Outputs. These are CMOS output logic levels. EN/ EN Receiver Enable (Active High on ADM213E, Active Low on ADM211E); This input is used to enable/disable the receiver outputs. With EN = Low ADM211E (EN = High ADM213E), the receiver outputs are enabled. With EN = High (EN = Low ADM213E), the receiver outputs are placed in a high impedance state. SHDN/SHDN Shutdown Control (Active Low on ADM213E, Active High on ADM211E); Refer to Table II. In shutdown the charge pump is disabled, the transmitter outputs are turned off and all receiver outputs (ADM211E), receivers R1, R2, R3 (ADM213E) are placed in a high impedance state. Receivers R4 and R5 on the ADM213E continue to operate normally during shutdown. Power consumption in shutdown for all parts reduces to 5 µW. TTL/CMOS INPUTS * TTL/CMOS OUTPUTS R5OUT*** T1IN ADM213E SHDN RS-232 OUTPUTS T1OUT GND T2IN T3IN T4IN T2OUT T3OUT T4OUT RS-232 INPUTS ** R1IN R2IN R3IN R1OUT R2OUT R3OUT *INTERNAL 400k PULL-UP RESISTOR ON EACH CMOS INPUT **INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT ***ACTIVE IN SHUTDOWN EN +5V TO +10V VOLTAGE DOUBLER +10V TO –10V VOLTAGE INVERTER 14 12 11 0.1 F 6.3V +5V INPUT VCC V+ V– C1+ C1– C2+ C2– 0.1 F 16V 0.1 F 16V 0.1 F 16V 13 0.1 F 10 15 17 3 1 2 28 T3 T4 T2 T1 21 6 7 20 25 27 9 4 R1 R2 R3 5 8 16 R4IN*** R5IN*** R4OUT*** 18 23 R4 R5 19 26 24 22 Figure 10. ADM213E Typical Operating Circuit |
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