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ADM202 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 ADM202은 전자 산업 및 응용 분야에서
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부품번호 ADM202 기능
기능 CMOS RS-232 Driver/Receiver
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ADM202 데이터시트, 핀배열, 회로
Data Sheet
FEATURES
120 kB transmission rate
Small (0.1 µF) charge pump capacitors
Single 5 V power supply
Meets TIA/EIA-232-E and V.28 specifications
2 drivers and 2 receivers
On-board dc-to-dc converters
±9 V output swing with 5 V supply
Low power BiCMOS: 2.5 mA ICC
±30 V receiver input levels
APPLICATIONS
Computers
Peripherals
Modems
Printers
Instruments
GENERAL DESCRIPTION
The ADM202 is a 2-channel RS-232 line driver/receiver pair
designed to operate from a single 5 V power supply. A highly
efficient on-chip charge pump design permits RS-232 levels to
be developed using charge pump capacitors as small as 0.1 µF.
This converter generates ±10 V RS-232 output levels.
The ADM202 meets or exceeds the TIA/EIA-232-E and V.28
specifications. Fast driver slew rates permit 120 kB operation,
and high drive currents allow extended cable lengths.
High Speed, 5 V, 0.1 µF
CMOS RS-232 Driver/Receiver
ADM202
TYPICAL APPLICATION CIRCUIT
5V INPUT
0.1µF +
6.3V
1 C1+
3 C1–
+5V TO +10V
VOLTAGE
DOUBLER
VCC 16
V+ 2
0.1µF
+ 6.3V
+ 0.1µF
6.3V
0.1µF +
16V
TTL/CMOS
INPUTS1
T1IN
T2IN
4 C2+
5 C2–
+10V TO –10V
VOLTAGE
INVERTER
11 T1
10 T2
V– 6
14
7
0.1µF
+ 16V
T1OUT
T2OUT
RS-232
OUTPUTS
TTL/CMOS
OUTPUTS
R1OUT
R2OUT
12 R1 13
9
GND
15
R2 8
ADM202
R1IN
R2IN
RS-232
INPUTS2
1INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
2INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
Figure 1.
An epitaxial BiCMOS construction minimizes power consump-
tion to 10 mW and guards against latch-up. Overvoltage
protection is provided, allowing the receiver inputs to withstand
continuous voltages in excess of ±30 V. In addition, all pins
contain ESD protection to levels greater than 2 kV.
The ADM202 is available in a 16-lead PDIP and both narrow
and wide 16-lead SOIC packages.
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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
©2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com




ADM202 pdf, 반도체, 판매, 대치품
Data Sheet
ADM202
SPECIFICATIONS
VCC = 5 V ± 10%, (C1 to C4 = 0.1 µF). All specifications TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter
OUTPUT VOLTAGE SWING
VCC POWER SUPPLY CURRENT (ICC)
INPUT LOGIC THRESHOLD
Low, VINL
High, VINH
LOGIC PULL-UP CURRENT
RS-232 INPUT
Voltage Range
Threshold
Low
High
Hysteresis
Resistance
TTL/CMOS Output Voltage
Low, VOL
High, VOH
PROPAGATION DELAY
TRANSITION REGION SLEW RATE
BAUD RATE
OUTPUT
Output Resistance
RS-232 Output Short-Circuit Current
Min Typ Max Unit Test Conditions/Comments
±5 ±9
V VCC = 5 V ± 5%; T1OUT and T2OUT loaded with 3 kΩ to GND
±5 ±9
V VCC = 5 V ± 10%; TA = 25°C; T1OUT and T2OUT loaded with 3 kΩ to GND
2.5 6.0 mA No load; T1IN and T2IN = VCC, or T1IN and T2IN = GND
0.8 V
TxIN
2.4 V TxIN
12 25 µA TxIN = 0 V
−30 +30 V
0.8 1.2
V
1.6 2.4 V
0.2 0.4 1.0 V
3 5 7 kΩ TA = 0°C to 85°C
3.5
0.3
8
120
0.4
5
V IOUT = 1.6 mA
V IOUT = –1.0 mA
µs RS-232 to TTL
V/µs RL = 3 kΩ, CL = 1000 pF, measured from +3 V to –3 V or –3 V to +3 V
kB RL = 3 kΩ, CL = 1 nF
300 Ω VCC = V+ = V– = 0 V, VOUT = ±2 V
±10 ±60 mA
Rev. B | Page 3 of 10

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ADM202 전자부품, 판매, 대치품
ADM202
TYPICAL PERFORMANCE CHARACTERISTICS
15
10
V+
5
0
–5
V–
–10
–15
0
5 10 15 20 25
LOAD CURRENT (mA)
Figure 3. Charge Pump V+, V− vs. Load Current
30
30
VCC = 5V
RL = 3k
25 f = 10kHz
20
15
LOW-TO-HIGH SLEW RATE
10
HIGH-TO-LOW SLEW RATE
5
0
0 0.5k 1.0k 1.5k 2.0k 2.5k
CAPACITIVE LOAD (pF)
Figure 4. Transmitter Slew Rate vs. Capacitive Load
3.0k
T
1
Data Sheet
15
Tx OUTPUT HIGH
10
5 Tx OUTPUT HIGH LOADED
0
–5 Tx OUTPUT LOW LOADED
–10
–15
4.0
Tx OUTPUT LOW
4.5 5.0
VCC (V)
5.5
Figure 6. Transmitter (Tx) Output Voltage vs. VCC
15
10
Tx OUTPUT HIGH
5
0
–5
Tx OUTPUT LOW
–10
–15
0 2 4 6 8 10 12 14
LOAD CURRENT (mA)
Figure 7. Transmitter (Tx) Output Voltage vs. Load Current
T
1
22
CH1 10.0V CH2 5.00V
M1.00µs
LOADED SLEW RATE (1nF)
CH1 –6.4V
Figure 5. Transmitter Fully Loaded Slew Rate
CH1 10.0V CH2 5.00V
M1.00µs
UNLOADED SLEW RATE
CH2
Figure 8. Transmitter Unloaded Slew Rate
–6.4V
Rev. B | Page 6 of 10

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