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기능 RS-232 Line Driver/Receiver
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ADM3252E 데이터시트, 핀배열, 회로
Data Sheet
Isolated, Dual Channel, RS-232 Line
Driver/Receiver
ADM3252E
FEATURES
2.5 kV fully isolated (power and data) RS-232 transceiver
isoPower integrated, isolated dc-to-dc converter
Operational from single 3.3 V or 5 V supply
460 kbps data rate
2 × Tx and 2 × Rx channels
Meets EIA/TIA-232E specifications
ESD protection to IEC 61000-4-2 on RINx and TOUTx pins
Contact discharge: ±8 kV
Air gap discharge: ±15 kV
0.1 μF charge pump capacitors
High common-mode transient immunity: >25 kV/μs
Safety and regulatory approvals (pending)
UL recognition
2500 V rms for 1 minute per UL 1577
VDE certificate of conformity
IEC 60747-5-2 (VDE 0884, Part 2)
VIORM = 560 V peak
CSA Component Acceptance Notice #5A
Operating temperature range: −40°C to +85°C
44-ball chip scale package ball grid array (CSP_BGA)
APPLICATIONS
Isolated RS-232 interface
High noise data communications
Industrial communications
Industrial/telecommunications diagnostic ports
Medical equipment
GENERAL DESCRIPTION
The ADM3252E is a high speed, 2.5 kV, fully isolated, dual-
channel RS-232/V.28 transceiver device that is operational from
a single 3.3 V or 5 V power supply. Because of high ESD protection
on the RIN1, RIN2, TOUT1, and TOUT2 pins, the ADM3252E is ideally
suited for operation in electrically harsh environments or where
RS-232 cables are frequently plugged and unplugged.
The ADM3252E provides four independent isolation channels
using the integrated and isolated power of isoPower™. There is
no requirement to use a separate isolated dc-to-dc converter. Chip
scale transformer iCoupler® technology from Analog Devices, Inc.,
is used for both the isolation of the logic signals and the integrated
dc-to-dc converter. The result is a total isolation solution.
FUNCTIONAL BLOCK DIAGRAM
C1
0.1µF
16V
C3
0.1µF
10V
10µF
0.1µF
C2
0.1µF
16V
C4
0.1µF
16V
ADM3252E
VCC
ROUT1
TIN1
ROUT2
TIN2
OSC
DECODE
ENCODE
DECODE
ENCODE
C1+ C1– V+ VISO
VOLTAGE
DOUBLER
C2+ C2– V–
VOLTAGE
INVERTER
RECT REG
ENCODE
DECODE
ENCODE
DECODE
R RIN1*
T TOUT1
R RIN2*
T TOUT2
GND
GNDISO
*INTERNAL 5kPULL-DOWN RESISTOR ON THE RS-232 INPUTS.
Figure 1.
isoPower technology in the ADM3252E uses high frequency
switching elements to transfer power through its transformer.
Special care must be taken during printed circuit board (PCB)
layout to meet emissions standards. Refer to the AN-0971
Application Note, Recommendations for Control of Radiated
Emissions with isoPower Devices, for details on board layout
considerations.
The ADM3252E conforms to the EIA/TIA-232E and ITU-T V.28
specifications and operates at data rates of 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 or 5 V
supply. The ADM3252E is available in a 44-ball, chip scale
package ball grid array (CSP_BGA) and is specified over the
−40°C to +85°C temperature range.
Rev. A
Document Feedback
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2012–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com




ADM3252E pdf, 반도체, 판매, 대치품
Data Sheet
ADM3252E
SPECIFICATIONS
All voltages are relative to their respective grounds, all minimum/maximum specifications apply over the entire recommended operating
range, TA = −40°C to +85°C, unless otherwise noted.
Table 1.
Parameter
DC CHARACTERISTICS
VCC Operating Voltage Range
UVLO Threshold
Rising
Falling
Input Supply Current, ICC
VISO Output
VISO Maximum Load Current, IISO(MAX)
LOGIC
Transmitter Inputs, TIN1 and TIN2
Logic Input Current
Logic Input Threshold
Low
High
Receiver Outputs, ROUT1 and ROUT2
Logic High Output
Logic Low Output
RS-232
Receiver Inputs, RIN1 and RIN2
EIA-232 Input
Voltage Range1
Threshold Low
Threshold High
Hysteresis
Resistance
Transmitter Outputs, TOUT1 and TOUT2
Output Voltage Swing (RS-232)
Transmitter Output Resistance
Output Short-Circuit Current (RS-232)
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay
tPHL
tPLH
Transmitter Propagation Delay
Transmitter Skew
Receiver Skew
Transition Region Slew Rate
Min
3.0
−10
0.7 × VCC
VCC − 0.2
VCC − 0.5
−30
0.8
3
±5.0
300
460
Typ
3.3
2.7
2.3
20
45
35
3.3
+0.01
VCC
VCC − 0.3
0.0
0.2
1.0
1.5
0.45
5
±5.2
±15
0.4
0.4
0.3
30
300
10
Max
5.5
35
75
60
15
+10
0.3 × VCC
0.1
0.4
+30
2.0
7
1
1
1.2
Unit
V
V
V
mA
mA
mA
V
mA
μA
V
V
V
V
V
V
V
V
V
V
V
Ω
mA
kbps
μs
μs
μs
ns
ns
V/μs
Test Conditions/Comments
Undervoltage lockout
No load
RL = 3 kΩ, VCC = 3.0 V to 5.5 V
RL = 3 kΩ, VCC = 3.3 V
IISO = 0 μA
IROUTH = −20 μA
IROUTH = −4 mA
IROUTH = 20 μA
IROUTH = 4 mA
RL = 3 kΩ to GND
VCC = 0 V, VISO = 0 V
RL = 3 kΩ to 7 kΩ, CL = 50 pF to 1000 pF
RL = 3 kΩ, CL = 1000 pF
Measured from +3 V to −3 V or −3 V to +3 V,
VCC = +3.3 V, RL = 3 kΩ, CL = 1000 pF, TA = 25°C
Rev. A | Page 3 of 16

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ADM3252E 전자부품, 판매, 대치품
ADM3252E
ABSOLUTE MAXIMUM RATINGS
Table 5.
Parameter
VCC, VISO
V+
V−
Input Voltages
TIN1, TIN2
RIN1, RIN2
Output Voltages
TOUT1, TOUT2
ROUT1, ROUT2
Short-Circuit Duration
TOUT1, TOUT2
Power Dissipation
Operating Temperature Range
Industrial
Storage Temperature
Pb-Free Temperature (Soldering, 30 sec)
Storage Temperature Prior to Soldering
Bake Temperature (If Required)
Rating
−0.3 V to +6 V
(VCC − 0.3 V) to +13 V
−13 V to +0.3 V
−0.3 V to (VCC + 0.3 V)
±30 V
±15 V
−0.3 V to (VCC + 0.3 V)
Continuous
750 mW
−40°C to +85°C
−65°C to +150°C
260°C
30°C/60% RH max for
168 hours (MSL3)
125°C + 5°C/−0°C for
48 hours
Data Sheet
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.
ESD CAUTION
Rev. A | Page 6 of 16

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ADM3252E

RS-232 Line Driver/Receiver

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