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ADM208EARZ-REEL1 Datasheet(PDF) 7 Page - Analog Devices

Part No. ADM208EARZ-REEL1
Description  EMI/EMC-Compliant, ±15 kV ESDProtected, RS-232 Line Drivers/Receivers
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADM206E/ADM207E/ADM208E/ADM211E/ADM213E
Rev. E | Page 7 of 20
TOP VIEW
(Not to Scale)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
ADM213E
T3OUT
T1OUT
T4OUT
R3IN
T2OUT
R2IN
R3OUT
R2OUT
T2IN
EN
R4IN1
T1IN
R1OUT
R4OUT1
T4IN
R1IN
GND
T3IN
R5OUT1
VCC
C1+
R5IN1
V–
V+
C1–
C2–
C2+
1ACTIVE IN SHUTDOWN.
SHDN
Figure 10. ADM213E Pin Configuration
0.1µF
16V
0.1µF
16V
+5V TO+10V
VOLTAGE
DOUBLER
+10V TO –10V
VOLTAGE
INVERTER
TTL/CMOS
INPUTS1
TTL/CMOS
OUTPUTS
RS-232
OUTPUTS
RS-232
INPUTS2
+
+
0.1µF
5V INPUT
+
+
+
T1
T2
T3
T4
R1
R2
R3
R4
R5
GND
ADM213E
T1IN
T2IN
T3IN
T4IN
R1OUT
R2OUT
R3OUT
R4OUT3
R5OUT3
EN
T1OUT
T2OUT
T3OUT
T4OUT
R1IN
R2IN
R3IN
R4IN3
R5IN3
C1+
C1–
C2+
C2–
VCC
V+
V–
SHDN
1 INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
2 INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
3 ACTIVE IN SHUTDOWN.
23
25
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9
18
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2
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1
17
11
13
22
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5
8
19
6
7
26
21
20
15
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12
14
10
0.1µF
6.3V
0.1µF
16V
Figure 11. ADM213E Typical Operating Circuit
Table 6. 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. A 0.1 μF capacitor is recommended, but larger capacitors (up to
47 μF) can be used.
C2+, C2–
External Capacitor 2 is connected between these pins. A 0.1 μF capacitor is recommended, but larger capacitors (up to
47 μF) can be used.
TIN
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels. An internal 400 kΩ pull-up resistor to VCC 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 kΩ pull-down resistor to GND is connected on
each input.
ROUT
Receiver Outputs. These are TTL/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 for the ADM211E (EN = high for the ADM213E), the receiver outputs are enabled. With EN = high
for the ADM211E (EN = low for the ADM213E), the receiver outputs are placed in a high impedance state. (See Table 3
and Table 4.)
SHDN/SHDN
Shutdown Control (active low on ADM213E, active high on ADM211E). When the ADM211E is in shutdown, the charge
pump is disabled, the transmitter outputs are turned off, and all receiver outputs are placed in a high impedance state.
When the ADM213E is in shutdown, the charge pump is disabled, the transmitter outputs are turned off, and Receiver R1 to
Receiver R3 are placed in a high impedance state; Receiver R4 and Receiver R5 on the ADM213E continue to operate
normally during shutdown. (See Table 3 and Table 4.) Power consumption for all parts reduces to 5 μW in shutdown.




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