0.1 μF, 5 V Powered CMOS
RS-232 Drivers/Receivers
ADM206/ADM207/ADM208/ADM211/ADM213
FEATURES
TYPICAL OPERATING CIRCUIT
5V INPUT
0.1 μF to 10 μF capacitors
120 kB/s data rate
Two receivers active in shutdown (ADM213)
On-board dc-to-dc converters
±9 V output swing with 5 V supply
Low power (15 mW)
Low power shutdown ≤ 5 μW
±30 V receiver input levels
Latch-up free
Pin compatible to MAX206-211/213
TTL/CMOS
INPUTS1
APPLICATIONS
Computers
Peripherals
Modems
Printers
Instruments
TTL/CMOS
OUTPUTS
0.1μF
16V
+
0.1μF
16V
+
12
C1+
14
C1–
15
C2+
16
C2–
+5V TO +10V
VOLTAGE
DOUBLER
VCC 11
+10V TO –10V
VOLTAGE
INVERTER
V– 17
V+ 13
0.1μF
+ 6.3V
0.1μF
+ 16V
T1IN
7
T1
2
T1OUT
T2IN
6
T2
3
T2OUT
T3IN
20
T3
1
T3OUT
T4IN
21
T4
28
T4OUT
R1OUT
8
R1
9
R1IN
R2OUT
5
R2
4
R2IN
R3OUT
26
R3
27
R3IN
R4OUT
22
R4
23
R4IN
R5OUT
19
R5
18
R5IN
EN
24
25
SD
GND
ADM211
+
0.1μF
RS-232
OUTPUTS
RS-232
INPUTS2
NOTES
1INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
2INTERNAL 5kΩ PULL-DOWN RESIST OR ON EACH RS-232 INPUT.
00067-0-001
10
Figure 1.
GENERAL DESCRIPTION
The ADM2xx family of line drivers/receivers is intended for all
EIA-232-E and V.28 communications interfaces, especially in
applications where ±12 V is not available. The ADM206,
ADM211, and ADM213 feature a low power shutdown mode
that reduces power dissipation to less than 5 μW, making them
ideally suited for battery-powered equipment. The ADM213 has
an active low shutdown and an active high receiver-enable
control. Two receivers of the ADM213 remain active during
shutdown. This feature is useful for ring indicator monitoring.
All members of the ADM2xx family include two internal charge
pump voltage converters that allow operation from a single 5 V
supply. These parts convert the 5 V input power to the ±10 V
required for RS-232 output levels.
Table 1. Selection Table
Part
Number
ADM206
ADM207
ADM208
ADM211
ADM213
Power Supply
Voltage
5V
5V
5V
5V
5V
Number of RS232 Drivers
4
5
4
4
4
Number of
RS-232 Receivers
3
3
4
5
5
External
Capacitors
4
4
4
4
4
Low Power
Shutdown (SD)
Yes
No
No
Yes
Yes (SD)
TTL ThreeState EN
Yes
No
No
Yes
Yes (EN)
Number of Receivers
Active in Shutdown
0
0
0
0
2
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2011 Analog Devices, Inc. All rights reserved.
ADM206/ADM207/ADM208/ADM211/ADM213
TABLE OF CONTENTS
Features .............................................................................................. 1
Pin Configurations and Function Descriptions ............................5
Applications ....................................................................................... 1
Typical Performance Characteristics ..............................................9
Typical Operating Circuit ................................................................ 1
General Information ...................................................................... 11
General Description ......................................................................... 1
Circuit Description .................................................................... 11
Revision History ............................................................................... 2
Application Hints ....................................................................... 12
Specifications..................................................................................... 3
Outline Dimensions ....................................................................... 13
Absolute Maximum Ratings............................................................ 4
Ordering Guide .......................................................................... 16
ESD Caution .................................................................................. 4
REVISION HISTORY
5/11—Data Sheet Changed from Rev. C to Rev. D
Deleted ADM209 ................................................................ Universal
Changes to Figure 5 .......................................................................... 5
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 15
1/05—Data Sheet Changed from Rev. B to Rev. C
Changes to Specifications ................................................................ 3
Change to Receivers section .......................................................... 11
Change to Driving Long Cables section ...................................... 12
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 15
6/02—Data Sheet Changed from Rev. A to Rev. B
Removed all references to ADM205 ................................ Universal
3/02—Data Sheet Changed from Rev. 0 to Rev. A
Changes to numbers in Min/Typ/Max column of
Specifications page ........................................................................... 2
Updated Figures ............................................................................ 8, 9
Revision 0: Initial Version
Rev. D | Page 2 of 16
ADM206/ADM207/ADM208/ADM211/ADM213
SPECIFICATIONS
VCC = 5 V ± 10% (ADM206, ADM207, ADM208, ADM211, ADM213); C1–C4 = 0.1 μF ceramic. All specifications TMIN to TMAX, unless
otherwise noted.
Table 2.
Parameter
Output Voltage Swing
VCC Power Supply Current
Shutdown Supply Current
Input Logic Threshold Low, VINL
Input Logic Threshold High, VINH
Logic Pull-Up Current
RS-232 Input Voltage Range 1
RS-232 Input Threshold Low
RS-232 Input Threshold High
RS-232 Input Hysteresis
RS-232 Input Resistance
TTL/CMOS Output Voltage Low, VOL
TTL/CMOS Output Voltage High, VOH
TTL/CMOS Output Leakage Current
Output Enable Time (TEN)
Output Disable Time (TDIS)
Propagation Delay
Transition Region Slew Rate
Output Resistance
RS-232 Output Short Circuit Current
1
Min
±5
Typ
±9
5
1
Max
13
10
0.8
2.0
10
–30
0.8
3
1.25
1.9
0.65
5
25
+30
2.4
7
0.4
3.5
0.05
115
165
0.5
8
±10
±12
±60
5
300
Unit
V
mA
μA
V
V
μA
V
V
V
V
kΩ
V
V
μA
ns
ns
μs
V/μs
Ω
mA
Test Conditions/Comments
All transmitter outputs loaded with 3 kΩ to ground
No load
TIN, EN, SD, EN, SD
TIN, EN, SD, EN, SD
TIN = 0 V
TA = 0°C to 85°C
IOUT = 1.6 mA
IOUT = –1.0 mA
EN = VCC, EN = 0 V, 0 V ≤ ROUT ≤ VCC
ADM206, ADM211 (Figure 22. CL = 150 pF)
ADM206, ADM211 (Figure 22. RL = 1 kΩ)
RS-232 to TTL
RL = 3 kΩ, CL = 2500 pF; measured from +3 V to –3 V or –3 V to +3 V
VCC = V+ = V– = 0 V, VOUT= ± 2 V
Guaranteed by design.
Rev. D | Page 3 of 16
ADM206/ADM207/ADM208/ADM211/ADM213
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Table 3.
Parameter
VCC
V+
V–
Input Voltages
TIN
RIN
Output Voltages
TOUT
ROUT
Short-Circuit Duration
TOUT
Power Dissipation
N-24 PDIP (Derate 13.5 mW/°C
above 70°C)
R-24 SOIC (Derate 12 mW/°C
above 70°C)
R-28 SOIC (Derate 12.5 mW/°C
above 70°C)
RS-24 SSOP (Derate 12 mW/°C
above 70°C)
RS-28 SSOP (Derate 10 mW/°C
above 70°C)
Thermal Impedance, θJA
N-24 PDIP
R-24 SOIC
R-28 SOIC
RS-24 SSOP
RS-28 SSOP
Operating Temperature Range
Industrial (A Version)
Storage Temperature Range
Lead Temperature, Soldering
Vapor Phase (60 s)
Infrared (15 s)
Min
–0.3 V to +6 V
(VCC – 0.3 V) to +14 V
+0.3 V to –14 V
–0.3 V to (VCC + 0.3 V)
±30 V
(V+, +0.3 V) to (V–, –0.3 V)
–0.3 V to (VCC + 0.3 V)
ESD CAUTION
Continuous
1000 mW
850 mW
900 mW
850 mW
900 mW
120°C/W
85°C/W
80°C/W
115°C/W
100°C/W
–40°C to +85°C
–65°C to +150°C
300°C
215°C
220°
Rev. D | Page 4 of 16
ADM206/ADM207/ADM208/ADM211/ADM213
PIN CONFIGURATION4 AND FUNCTION DESCRIPTIONS
T3OUT
1
24
T4OUT
T3OUT
1
24 T4OUT
T1OUT
2
23
R2IN
T1OUT
2
23 R2IN
T2OUT
3
22
R2OUT
T2OUT
3
22 R2OUT
R1IN
4
21
SD
R1IN
4
21 T5IN
R1OUT
5
20
EN
R1OUT
5
T2IN
6
19
T4IN
T2IN
6
T1IN
7
GND
8
17
R3OUT
VCC
9
16
R3IN
C1+ 10
15
V–
C1+ 10
V+ 11
14
C2–
C1– 12
13
C2+
Figure 2. ADM206 PDIP/SOIC/SSOP Pin Configuration
20 T5OUT
T1IN
TOP VIEW 19 T4IN
7 (Not to Scale) 18 T3IN
GND
8
17 R3OUT
VCC
9
16 R3IN
00067-0-002
TOP VIEW
(Not to Scale) 18 T3
IN
ADM207
15 V–
V+ 11
14 C2–
C1– 12
13 C2+
00067-0-004
ADM206
Figure 4. ADM207 PDIP/SOIC/SSOP Pin Configuration
5V INPUT
5V INPUT
0.1μF
16V
TTL/CMOS
INPUTS1
C1+
12
C1–
13
C2+
14
C2–
+5V TO +10V
VOLTAGE
DOUBLER
+10V TO –10V
VOLTAGE
INVERTER
T1IN
7
T1
T2IN
6
T2
VCC 9
V+ 11
V– 15
2
3
0.1μF
+ 6.3V
0.1μF
16V
+
0.1μF
10
C1+
12
C1–
13
C2+
14
C2–
+5V TO +10V
VOLTAGE
DOUBLER
VCC 9
+10V TO –10V
VOLTAGE
INVERTER
V– 15
V+ 11
0.1μF
+ 6.3V
+
0.1μF
0.1μF
+ 16V
0.1μF
+ 16V
T1OUT
T2OUT
T3IN
18
T3
1
T3OUT
T4IN
19
T4
24
T4OUT
R1OUT
5
R1
4
R1IN
R2OUT
22
R2
23
R2IN
R3OUT
17
R3
16
R3IN
EN
20
ADM206
21
SD
GND
+
TTL/CMOS
INPUTS1
RS-232
OUTPUTS
RS-232
INPUTS2
TTL/CMOS
OUTPUTS
NOTES
1INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
2INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
T1IN
7
T1
2
T1OUT
T2IN
6
T2
3
T2OUT
T3IN
18
T3
1
T3OUT
T4IN
19
T4
24
T4OUT
T5IN
21
T5
20
T5OUT
R1OUT
5
R1
4
R1IN
R2OUT
22
R2
23
R2IN
R3OUT
17
R3
16
R3IN
GND
8
RS-232
OUTPUTS
RS-232
INPUTS2
ADM207
8
00067-0-003
TTL/CMOS
OUTPUTS
+
10
+
NOTES
1INTERNAL 400k Ω PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
2INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
Figure 5. ADM207 Typical Operating Circuit
Figure 3. ADM206 Typical Operating Circuit
Rev. D | Page 5 of 16
00067-0-005
0.1μF
6.3V
+
0.1μF
6.3V
ADM206/ADM207/ADM208/ADM211/ADM213
28
27
R3IN
T2OUT 3
26
R3OUT
R2IN 4
25
SD
T2OUT
1
24
T3OUT
T1OUT
2
23
R3IN
R2IN
3
22
R3OUT
R2OUT
4
21
T4IN
T2IN 6
T1IN
5
20
T4OUT
T1IN 7
R1OUT
6
R1IN
GND
8
17
R4OUT
VCC
9
16
C1+ 10
V+ 11
C1– 12
R2OUT 5
24 EN
ADM211
23
R4IN
TOP VIEW 22 R4OUT
R1OUT 8 (Not to Scale) 21 T4IN
T3IN
20
19
R5OUT
R4IN
VCC 11
18
R5IN
15
V–
C1+ 12
17
V–
14
C2–
V+ 13
16
C2–
13
C2+
C1– 14
15
C2+
00067-0-006
R1IN 9
GND 10
Figure 6. ADM208 PDIP/SOIC/SSOP Pin Configuration
00067-0-010
ADM208
TOP VIEW 19 T3IN
7 (Not to Scale) 18 T2IN
T4OUT
T3OUT 1
T1OUT 2
Figure 8. ADM211 SOIC/SSOP Pin Configuration
5V INPUT
5V INPUT
0.1μF
6.3V
0.1μF
16V
TTL/CMOS
INPUTS1
TTL/CMOS
OUTPUTS
+
10 C1+
12 C1–
+
13 C2+
14 C2–
+5V TO +10V
VOLTAGE
DOUBLER
+10V TO –10V
VOLTAGE
INVERTER
VCC 9
V+ 11
V– 15
0.1μF
+ 6.3V
+
0.1μF
0.1μF
+ 16V
0.1μF
16V
+
0.1μF
16V
+
12
C1+
14
C1–
15
C2+
16
C2–
+5V TO +10V
VOLTAGE
DOUBLER
VCC 11
+10V TO –10V
VOLTAGE
INVERTER
V– 17
V+ 13
0.1μF
+ 6.3V
T1IN
7
T1
2
T1OUT
T2IN
6
T2
3
T2OUT
T3IN
20
T3
1
T3OUT
T4IN
21
T4
28
T4OUT
5
T1
T2IN
18
T2
1
T2OUT
T3IN
19
T3
24
T3OUT
T4IN
21
T4
20
T4OUT
R1OUT
8
R1
9
R1IN
R2OUT
5
R2
4
R2IN
R3OUT
26
R3
27
R3IN
R4OUT
22
R4
23
R4IN
R5OUT
19
R5
18
R5IN
EN
24
25
SD
T1OUT
R1OUT
6
R1
7
R1IN
R2OUT
4
R2
3
R2IN
R3OUT
22
R3
23
R3IN
R4OUT
17
R4
16
R4IN
GND
TTL/CMOS
INPUTS1
RS-232
OUTPUTS
TTL/CMOS
OUTPUTS
RS-232
INPUTS2
ADM208
8
GND
ADM211
0.1μF
0.1μF
+ 16V
T1IN
2
+
RS-232
OUTPUTS
RS-232
INPUTS2
Figure 9. ADM211 Typical Operating Circuit
Figure 7. ADM208 Typical Operating Circuit
Rev. D | Page 6 of 16
00067-0-011
NOTES
1INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
2INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
00067-0-007
10
NOTES
1INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
2INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
ADM206/ADM207/ADM208/ADM211/ADM213
5V INPUT
TTL/CMOS
INPUTS1
28
T1OUT 2
27
R3IN
T2OUT 3
26
R3OUT
R2IN 4
25
SD
R2OUT 5
24
EN
23
R4IN*
T2IN 6
ADM213
+
0.1μF
16V
+
12 C1+
14 C1–
15 C2+
16 C2–
+5V TO +10V
VOLTAGE
DOUBLER
VCC 11
+10V TO –10V
VOLTAGE
INVERTER
V– 17
V+ 13
T1IN 7 TOP VIEW 22 R4OUT*
R1OUT 8 (Not to Scale) 21 T4IN
T3IN
20
GND 10
19
R5OUT*
VCC 11
18
R5IN*
7
T1
2
T1OUT
T2IN
6
T2
3
T2OUT
T3IN
20
T3
1
T3OUT
T4IN
21
T4
28
T4OUT
R1OUT
8
R1
9
R1IN
R2OUT
5
R2
4
R2IN
R3OUT
26
R3
27
R3IN
R4OUT3
22
R4
23
R4IN3
R5OUT3
19
R5
18
R5IN3
EN
24
25
SD
C1+ 12
17
V–
V+ 13
16
C2–
C1– 14
15
C2+
* ACTIVE IN SHUTDOWN
GND
ADM213
RS-232
OUTPUTS
RS-232
INPUTS2
10
00067-0-012
R1IN 9
+
0.1μF
0.1μF
+ 16V
T1IN
T4OUT
TTL/CMOS
OUTPUTS
0.1μF
+ 6.3V
NOTES
1INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
2INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
3ACTIVE IN SHUTDOWN.
Figure 10. ADM213 SOIC/SSOP Pin Configuration
Figure 11. ADM213 Typical Operating Circuit
Rev. D | Page 7 of 16
00067-0-013
T3OUT 1
0.1μF
16V
ADM206/ADM207/ADM208/ADM211/ADM213
Table 4. Pin Function Descriptions
Mnemonic
VCC
V+
V–
GND
C1+
C1–
C2+
C2–
TIN
TOUT
RIN
ROUT
EN/EN
SD/SD
NC
Function
Power Supply Input. 5 V ± 10%.
Internally Generated Positive Supply (10 V nominal).
Internally Generated Negative Supply (–10 V Nominal).
Ground Pin. Must be connected to 0 V.
External Capacitor (+ terminal) is connected to this pin.
External Capacitor (– terminal) is connected to this pin.
External Capacitor (+ terminal) is connected to this pin.
External Capacitor (– terminal) is connected to this pin.
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels. An internal 400 kΩ pull-up resistor to VCC is connected to
each input.
Transmitter (Driver) Outputs. These are RS-232 levels (typically ± 10 V).
Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kΩ pull-down resistor to GND is connected to each
input.
Receiver Outputs. These are TTL/CMOS levels.
Enable Input. Active low on ADM206 and ADM211. Active high on ADM213. This input is used to enable/disable the receiver
outputs. With EN = low (EN = high ADM213), the receiver outputs are enabled. With EN = high (EN = low ADM213), the
outputs are placed in a high impedance state. This is useful for connecting to microprocessor systems.
Shutdown Input. Active high on ADM206 and ADM211. Active low on ADM213. With SD = high on the ADM206 and ADM211,
the charge pump is disabled, the receiver outputs are placed in a high impedance state, and the driver outputs are turned off.
With SD = low on the ADM213, the charge pump is disabled, the driver outputs are turned off, and all receivers, except R4 and
R5, are placed in a high impedance state. In shutdown, the power consumption reduces to 5 μW.
No Connect. No connections are required to this pin.
Table 5. ADM206 and ADM211 Truth Table
SD
0
0
1
EN
0
1
0
Status
Normal Operation
Normal Operation
Shutdown
Transmitters T1–T5
Enabled
Enabled
Disabled
Receivers R1–R5
Enabled
Disabled
Disabled
Transmitters T1–T4
Disabled
Disabled
Enabled
Enabled
Receivers R1–R3
Disabled
Disabled
Disabled
Enabled
Table 6. ADM213 Truth Table
SD
0
0
1
1
EN
0
1
0
1
Status
Shutdown
Shutdown
Normal Operation
Normal Operation
Rev. D | Page 8 of 16
Receivers R4, R5
Disabled
Enabled
Disabled
Enabled
ADM206/ADM207/ADM208/ADM211/ADM213
TYPICAL PERFORMANCE CHARACTERISTICS
15
15
10
10
V+
Tx O/P HIGH
5
Tx O/P (V)
0
–5
0
–5
V–
–10
Tx O/P LOW
–15
0
5
10
LOAD CURRENT (mA)
20
15
00067-0-014
–10
–15
Figure 12. Charge Pump V+, V– vs. Load Current
0
8
10
Figure 15. Transmitter Output Voltage vs. Load Current
350
50
45
300
V– IMP
40
250
35
IMPEDANCE (Ω)
SLEW RATE (V/μs)
4
6
LOAD CURRENT (mA)
2
00067-0-017
V+/V– (V)
5
30
25
NEGATIVE
SLEW
20
15
200
150
V+ IMP
100
10
0
500
1000
1500
2000
LOAD CAPACITANCE (pF)
2500
3000
00067-0-015
0
0
4.5
4.7
4.9
5.1
5.3
5.5
VCC (V)
Figure 13. Transmitter Slew Rate vs. Load Capacitance
Figure 16. Charge Pump Impedance vs. VCC
9
7
Tx O/P HIGH LOADED
5
T
1
1
0
–1
SD
V+
T
2
–3
3
T
–5
–9
V–
Tx O/P LOW LOADED
4.0
4.5
5.0
VCC (V)
5.5
6.0
3.1V
CH1 5.00V
CH2 5.00V M50.0μs CH1
CH3 5.00V BW
V+, V– EXITING SHUTDOWN (SD)
Figure 14. Transmitter Output Voltage vs. VCC
00067-0-019
–7
00067-0-016
Tx O/P (V)
3
Figure 17. Charge Pump, V+, V– Exiting Shutdown
Rev. D | Page 9 of 16
00067-0-018
50
POSITIVE
SLEW
5
ADM206/ADM207/ADM208/ADM211/ADM213
Tx INPUT
T
1
T
1
T
Tx INPUT
T
2
2
Tx OUTPUT
800mV
CH1 5.00V
Figure 18. Transmitter Output Loaded Slew Rate
CH2 5.00V M1.00μs CH1
800mV
Figure 19. Transmitter Output Unloaded Slew Rate
Rev. D | Page 10 of 16
00067-0-021
CH2 5.00V M1.00μs CH1
00067-0-020
CH1 5.00V
Tx OUTPUT
ADM206/ADM207/ADM208/ADM211/ADM213
GENERAL INFORMATION
The ADM206, ADM211, and ADM213 are particularly useful in
battery-powered systems because they feature a low power shutdown mode that reduces power dissipation to less than 5 μW.
To facilitate sharing a common line or for connection to a
microprocessor data bus, the ADM206, the ADM211, and the
ADM213 feature an enable (EN) function. When the receivers
are disabled, their outputs are placed in a high impedance state.
CIRCUIT DESCRIPTION
The internal circuitry in the ADM2xx consists of three main
sections: (a) a charge pump voltage converter; (b) RS-232-toTTL/CMOS receivers; and (c) TTL/CMOS-to-RS-232
transmitters.
Charge Pump DC-to-DC Voltage Converter
The charge pump voltage converter consists of an oscillator and
a switching matrix. The converter generates a ±10 V supply
from the 5 V input. This is done in two stages using a switched
capacitor technique, as illustrated in Figure 20 and Figure 21.
First, the 5 V input supply is doubled to 10 V using capacitor C1
as the charge storage element. The 10 V level is then inverted to
generate –10 V using C2 as the storage element.
S3
C1
S2
+
C3
+
S4
GND
INTERNAL
OSCILLATOR
Figure 20. Charge Pump Voltage Doubler
V+ = 2VCC
VCC
00067-0-022
S1
VCC
S3
S1
V+
FROM
VOLTAGE
DOUBLER
GND
C2
S2
+
C4
+
S4
GND
V– = –(V+)
INTERNAL
OSCILLATOR
00067-0-023
The ADM2xx family of RS-232 drivers/ receivers is designed to
solve interface problems by meeting the EIA-232-E
specifications while using a single digital 5 V supply. The EIA232-E standard requires transmitters that will deliver ±5 V
minimum on the transmission channel and receivers that can
accept signal levels down to ±3 V. The ADM2xx meet these
requirements by integrating step-up voltage converters and level
shifting transmitters and receivers onto the same chip. CMOS
technology is used to keep the power dissipation to an absolute
minimum. A comprehensive range of transmitter/ receiver
combinations is available to cover most communication needs.
The ADM2xx are modifications, enhancements, and
improvements to the AD2xx family and derivatives thereof. They
are essentially plug-in compatible and do not have materially
different applications.
Figure 21. Charge Pump Voltage Inverter
Capacitors C3 and C4 are used to reduce the output ripple.
Their values are not critical and can be reduced if higher levels
of ripple are acceptable. The charge pump capacitors C1 and C2
may also be reduced at the expense of higher output impedance
on the V+ and V– supplies.
The V+ and V– supplies may also be used to power external
circuitry if the current requirements are small.
Transmitters (Drivers)
The drivers convert TTL/CMOS input levels into EIA-232-E
output levels. With VCC = +5 V and driving a typical EIA-232-E
load, the output voltage swing is ±9 V. Even under worst-case
conditions, the drivers are guaranteed to meet the ±5 V EIA232-E minimum requirement.
The input threshold levels are both TTL- and CMOS-compatible
with the switching threshold set at VCC/4. With a nominal VCC =
5 V, the switching threshold is 1.25 V typical. Unused inputs
may be left unconnected, because an internal 400 kΩ pull-up
resistor pulls them high, forcing the outputs into a low state.
As required by the EIA-232-E standard, the slew rate is limited
to less than 30 V/μs, without the need for an external slew
limiting capacitor, and the output impedance in the power-off
state is greater than 300 Ω.
Receivers
The receivers are inverting level shifters that accept EIA-232-E
input levels (±5 V to ±15 V) and translate them into 5 V TTL/
CMOS levels. The inputs have internal 5 kΩ pull-down resistors
to ground and are also protected against overvoltages of up to
±30 V. The guaranteed switching thresholds are 0.8 V minimum
and 2.4 V maximum, well within the ±3 V EIA-232-E requirement. The low level threshold is deliberately positive, since it
ensures that an unconnected input will be interpreted as a
low level.
The receivers have Schmitt-trigger inputs with a hysteresis level
of 0.65 V. This ensures error-free reception for both noisy
inputs and inputs with slow transition times.
Rev. D | Page 11 of 16
ADM206/ADM207/ADM208/ADM211/ADM213
Shutdown (SD)
APPLICATION HINTS
The ADM2xx feature a control input that may be used to
disable the part and reduce the power consump-ion to less than
5 ΩW. This is very useful in battery-operated systems. During
shutdown, the charge pump is turned off, the transmitters are
disabled, and all receivers except R4 and R5 on the ADM213 are
put into a high impedance disabled state. Receivers R4 and R5
on the ADM213 remain enabled during shutdown. This feature
allows monitoring external activity while the device is in a low
power shutdown mode. The shutdown control input is active
high on all parts except the ADM213, where it is active low. See
Table 5 and Table 6.
Driving Long Cables
Enable Input
The ADM211 and ADM213 feature an enable input used to
enable or disable the receiver outputs. The enable input is active
low on the ADM211 and active high on the ADM213. See
Table 5 and Table 6. When the receivers are disabled, their
outputs are placed in a high impedance state. This function
allows the outputs to be connected directly to a microprocessor
data bus. It can also be used to allow receivers from different
devices to share a common data line. The timing diagram for
the enable function is shown in Figure 22.
In accordance with the EIA-232-E standard, long cables are
permissible provided the total load capacitance does not exceed
2500 pF. For longer cables that do exceed this, it is possible to
trade off baud rate for cable length. Large load capacitances cause
a reduction in slew rate, and therefore the maximum transmission baud rate is decreased. The ADM2xx are designed to
minimize the slew rate reduction that occurs as load
capacitance increases.
For the receivers, it is important that a high level of noise
immunity be inbuilt so that slow rise and fall times do not cause
multiple output transitions as the signal passes slowly through
the transition region. The ADM2xx have 0.65 V of hysteresis to
guard against this. This ensures that even in noisy environments
error-free reception can be achieved.
High Baud Rate Operation
The ADM2xx feature high slew rates, permitting data
transmission at rates well in excess of the EIA-232-E
specification. The drivers maintain ±5 V signal levels at data
rates up to 120 kB/s under worst-case loading conditions.
3V
EN*
0V
TEN
3.5V
VOH – 0.1V
0.8V
VOL + 0.1V
ROUT
* POLARITY OF EN IS REVERSED FOR ADM213.
00067-0-024
TDIS
Figure 22. Enable Timing
Rev. D | Page 12 of 16
ADM206/ADM207/ADM208/ADM211/ADM213
OUTLINE DIMENSIONS
1.185 (30.01)
1.165 (29.59)
1.145 (29.08)
24
13
1
12
0.180
(4.57)
MAX
0.150 (3.81)
0.130 (3.30)
0.110 (2.79)
0.295 (7.49)
0.285 (7.24)
0.275 (6.99)
0.325 (8.26)
0.310 (7.87)
0.300 (7.62)
0.015 (0.38) MIN
0.022 (0.56)
0.018 (0.46)
0.014 (0.36)
0.100
(2.54)
BSC
0.150 (3.81)
0.135 (3.43)
0.120 (3.05)
0.060 (1.52) SEATING
0.050 (1.27) PLANE
0.045 (1.14)
0.015 (0.38)
0.010 (0.25)
0.008 (0.20)
COMPLIANT TO JEDEC STANDARDS MO-095AG
CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
Figure 23. 24-Lead Plastic Dual In-Line Package [PDIP]
Narrow Body
(N-24-1)
Dimensions shown in inches and (millimeters)
15.60 (0.6142)
15.20 (0.5984)
24
13
7.60 (0.2992)
7.40 (0.2913)
1
12
10.65 (0.4193)
10.00 (0.3937)
2.65 (0.1043)
2.35 (0.0925)
0.75 (0.0295)
× 45°
0.25 (0.0098)
0.30 (0.0118)
0.10 (0.0039)
COPLANARITY 1.27 (0.0500)
BSC
0.10
0.51 (0.020)
0.31 (0.012)
8°
SEATING
0.33 (0.0130) 0°
PLANE
0.20 (0.0079)
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-013AD
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
Figure 24. 24-Lead Standard Small Outline Package [SOIC_W]
Wide Body
(RW-24)
Dimensions shown in millimeters and (inches)
Rev. D | Page 13 of 16
ADM206/ADM207/ADM208/ADM211/ADM213
8.50
8.20
7.90
24
13
8.20
7.80
7.40
5.60
5.30
5.00
12
1
PIN 1
2.00 MAX
0.65
BSC
0.05 MIN
1.85
1.75
1.65
COPLANARITY
0.10
0.38
0.22 SEATING
PLANE
0.95
0.75
0.55
8°
4°
0°
0.25
0.09
COMPLIANT TO JEDEC STANDARDS MO-150AG
Figure 25. 24-Lead Shrink Small Outline Package [SSOP]
(RS-24)
Dimensions shown in millimeters
18.10 (0.7126)
17.70 (0.6969)
28
15
7.60 (0.2992)
7.40 (0.2913)
1
14
2.65 (0.1043)
2.35 (0.0925)
10.65 (0.4193)
10.00 (0.3937)
0.75 (0.0295)
× 45°
0.25 (0.0098)
0.30 (0.0118)
0.10 (0.0039)
COPLANARITY
0.10
8°
1.27 (0.0500) 0.51 (0.0201) SEATING 0.33 (0.0130) 0°
BSC
PLANE
0.33 (0.0130)
0.20 (0.0079)
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-013AE
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
Figure 26. 28-Lead Standard Small Outline Package [SOIC_W]
Wide Body
(RW-28)
Dimensions shown in millimeters and (inches)
Rev. D | Page 14 of 16
ADM206/ADM207/ADM208/ADM211/ADM213
10.50
10.20
9.90
28
15
5.60
5.30
5.00
8.20
7.80
7.40
14
1
PIN 1
1.85
1.75
1.65
2.00 MAX
COPLANARITY
0.10
0.25
0.09
0.05 MIN
0.65
BSC
0.38
0.22
SEATING
PLANE
8°
4°
0°
COMPLIANT TO JEDEC STANDARDS MO-150AH
Figure 27. 28-Lead Shrink Small Outline Package [SSOP]
(RS-28)
Dimensions shown in millimeters
Rev. D | Page 15 of 16
0.95
0.75
0.55
ADM206/ADM207/ADM208/ADM211/ADM213
ORDERING GUIDE
Model 1
ADM206AN
ADM206ANZ
ADM206AR
ADM206AR-REEL
ADM206ARZ
ADM206ARZ-REEL
ADM206ARS
ADM206ARSZ
ADM206ARSZ-REEL
ADM207AN
ADM207ANZ
ADM207AR
ADM207ARZ
ADM207ARZ-REEL
ADM207ARS
ADM207ARSZ
ADM207ARSZ-REEL
ADM208AN
ADM208ANZ
ADM208AR
ADM208AR-REEL
ADM208ARZ
ADM208ARZ-REEL
ADM208ARSZ
ADM208ARSZ-REEL
ADM211AR
ADM211AR-REEL
ADM211ARZ
ADM211ARZ-REEL
ADM211ARS
ADM211ARS-REEL
ADM211ARSZ
ADM211ARSZ-REEL
ADM213AR
ADM213ARZ
ADM213ARZ-REEL
ADM213ARS
ADM213ARS-REEL
ADM213ARSZ
ADM213ARSZ-REEL
1
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package Description
24-lead PDIP
24-lead PDIP
24-lead SOIC_W
24-lead SOIC_W
24-lead SOIC_W
24-lead SOIC_W
24-lead SSOP
24-lead SSOP
24-lead SSOP
24-lead PDIP
24-lead PDIP
24-lead SOIC_W
24-lead SOIC_W
24-lead SOIC_W
24-lead SSOP
24-lead SSOP
24-lead SSOP
24-lead PDIP
24-lead PDIP
24-lead SOIC_W
24-lead SOIC_W
24-lead SOIC_W
24-lead SOIC_W
24-lead SSOP
24-lead SSOP
28-lead SOIC_W
28-lead SOIC_W
28-lead SOIC_W
28-lead SOIC_W
28-lead SSOP
28-lead SSOP
28-lead SSOP
28-lead SSOP
28-lead SOIC_W
28-lead SOIC_W
28-lead SOIC_W
28-lead SSOP
28-lead SSOP
28-lead SSOP
28-lead SSOP
Z = RoHS Compliant Part.
©2011 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D00067-0-5/11(D)
Rev. D | Page 16 of 16
Package Option
N-24-1
N-24-1
RW-24
RW-24
RW-24
RW-24
RS-24
RS-24
RS-24
N-24-1
N-24-1
RW-24
RW-24
RW-24
RS-24
RS-24
RS-24
N-24-1
N-24-1
RW-24
RW-24
RW-24
RW-24
RS-24
RS-24
RW-28
RW-28
RW-28
RW-28
RS-28
RS-28
RS-28
RS-28
RW-28
RW-28
RW-28
RS-28
RS-28
RS-28
RS-28