ADM3222 AD [Analog Devices], ADM3222 Datasheet

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ADM3222

Manufacturer Part Number
ADM3222
Description
Low Power, +3.3 V, RS-232 Line Drivers/Receivers
Manufacturer
AD [Analog Devices]
Datasheet

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GENERAL DESCRIPTION
The ADM3202/ADM3222/ADM1385 transceivers are high
speed, 2-channel RS-232/V.28 interface devices which operate
from a single +3.3 V power supply.
Low power consumption and a shutdown facility (ADM3222/
ADM1385) makes them ideal for battery powered portable
instruments.
The ADM3202/ADM3222/ADM1385 conforms to the EIA-
232E and CCITT V.28 specifications and operates at data rates
up to 460 kbps.
Four external 0.1 µF charge pump capacitors are used for the
voltage doubler/inverter permitting operation from a single
+3.3 V supply.
The ADM3222 contains additional enable and shutdown cir-
cuitry. The EN input may be used to three-state the receiver
outputs. The SD input is used to power down the charge
pump and transmitter outputs reducing the quiescent current to
less than 0.5 µA. The receivers remain enabled during shutdown
unless disabled using EN.
The ADM1385 contains a driver disable mode and a complete
shutdown mode.
The ADM3202 is available in a 16-lead DIP, narrow and wide
SOIC as well as a space saving 20-lead TSSOP package. The
ADM3222 is available in 18-lead DIP, SO and in 20-lead SSOP
and TSSOP. The ADM1385 is available in a 20-lead SSOP
package, which is pin compatible with the LTC1385 CG.
ADM3202/ADM3222/ADM1385
OUTPUTS
OUTPUTS
OUTPUTS
INPUTS
INPUTS
INPUTS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
Low Power, +3.3 V, RS-232
R1
R2
R1
R2
R1
R2
10V
10V
10V
10V
10V
10V
T1
T2
T1
T2
T1
T2
OUT
OUT
OUT
OUT
OUT
OUT
FUNCTIONAL BLOCK DIAGRAMS
IN
IN
IN
IN
IN
IN
+
+
+
+
+
+
EN
DD
Line Drivers/Receivers
C1+
C1–
C2+
C2–
C1+
C1–
C2+
C2–
C1+
C1–
C2+
C2–
+3.3V TO +6.6V
+3.3V TO +6.6V
+3.3V TO +6.6V
+6.6V TO –6.6V
+6.6V TO –6.6V
+6.6V TO –6.6V
GND
GND
GND
VOLTAGE
DOUBLER
INVERTER
VOLTAGE
DOUBLER
INVERTER
VOLTAGE
DOUBLER
INVERTER
VOLTAGE
T1
T2
VOLTAGE
T1
T2
VOLTAGE
T1
T2
R2
R2
R2
R1
R1
R1
ADM3222
ADM1385
INTERNAL 5k
ON EACH RS-232 INPUT
INTERNAL 5k
ON EACH RS-232 INPUT
INTERNAL 5k
ON EACH RS-232 INPUT
ADM3202
V
V
V
V+
V+
V+
CC
V–
CC
V–
CC
V–
+3.3V INPUT
+3.3V INPUT
+3.3V INPUT
PULL-DOWN RESISTOR
SD
PULL-DOWN RESISTOR
SD
PULL-DOWN RESISTOR
+
C4
0.1 F
10V
+
+
+
+
T1
T2
R1
R2
T1
T2
R1
R2
T1
T2
R1
R2
C3
0.1 F
6.3V
C4
0.1 F
10V
C3
0.1 F
6.3V
C4
0.1 F
10V
OUT
OUT
OUT
OUT
OUT
OUT
IN
IN
IN
IN
IN
IN
+
C3
0.1 F
6.3V
EIA/TIA-232
OUTPUTS
EIA/TIA-232
INPUTS
EIA/TIA-232
OUTPUTS
EIA/TIA-232
INPUTS
EIA/TIA-232
OUTPUTS
EIA/TIA-232
INPUTS
+
+
+
C5
0.1 F
C5
0.1 F
C5
0.1 F

Related parts for ADM3222

ADM3222 Summary of contents

Page 1

... The ADM3202 is available in a 16-lead DIP, narrow and wide SOIC as well as a space saving 20-lead TSSOP package. The ADM3222 is available in 18-lead DIP, SO and in 20-lead SSOP and TSSOP. The ADM1385 is available in a 20-lead SSOP package, which is pin compatible with the LTC1385 CG. ...

Page 2

... ADM3202/ADM3222/ADM1385–SPECIFICATIONS (V = +3.3 V 0.3 V, C1–C4 = 0.1 F. All specifications T CC Parameter DC CHARACTERISTICS Operating Voltage Range V Power Supply Current CC Shutdown Supply Current LOGIC Input Logic Threshold Low, V INL Input Logic Threshold High, V INH CMOS Output Voltage Low CMOS Output Voltage High Input Leakage Current ...

Page 3

... V) to +14 V ADM3202AN CC ADM3202ARN ADM3202ARW ADM3202ARU ADM3222AN ADM3222ARW ADM3222ARS + 0 ADM3222ARU ADM1385ARS N = Plastic DIP Small Outline Shrink Small Outline Thin Shrink Small Outline. ORDERING GUIDE Temperature Range Package Options –40°C to +85°C N-16 –40°C to +85°C R-16A –40°C to +85°C R-16 – ...

Page 4

... GND is connected on each input. Rx Receiver Outputs. These are CMOS output logic OUT levels. EN (ADM3222) Receiver Enable, Active Low. When low, the receiver outputs are enabled. When high, they are three-stated. SD (ADM3222) Shutdown Control. Active Low. When low, the charge pump is shut down and the transmitter outputs are disabled ...

Page 5

... V – (HIGH) – V OUT –2 T1 (LOW) – V OUT –4 –6 – CURRENT – mA ADM3202/ADM3222/ADM1385 –2 –4 –6 –8 4000 5000 0 250 200 150 100 50 0 5.0 5.5 3 (V) V– ...

Page 6

... CMOS technology is used to keep the power dissipation to an absolute minimum, allowing maximum battery life in portable applications. The ADM3202/ADM3222/ADM1385 is a modification, en- hancement and improvement to the AD230–AD241 family and its derivatives essentially plug-in compatible and does not have materially different applications. ...

Page 7

... C4 V– = –(V+) 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 ...

Page 8

... ADM3202/ADM3222/ADM1385 18-Lead Plastic DIP (N-18) 0.925 (23.49) 0.845 (21.47 0.280 (7.11) 0.240 (6.10 PIN 1 0.060 (1.52) 0.210 0.015 (0.38) (5.33) 0.130 MAX (3.30) 0.160 (4.06) MIN 0.115 (2.93) SEATING 0.022 (0.558) 0.100 0.070 (1.77) PLANE (2.54) 0.014 (0.356) 0.045 (1.15) BSC 20-Lead Thin Shrink Small Outline (TSSOP) (RU-20) 0.260 (6.60) 0.252 (6.40 0.006 (0.15) PIN 1 ...

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