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ADM3483 데이터시트 PDF




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부품번호 ADM3483 기능
기능 (ADM3483 - ADM3491) RS-485/RS-422 Transceivers
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ADM3483 데이터시트, 핀배열, 회로
Data Sheet
3.3 V Slew Rate Limited, Half- and
Full-Duplex, RS-485/RS-422 Transceivers
ADM3483/ADM3485/ADM3488/ADM3490/ADM3491
FEATURES
Operate with 3.3 V supply
Interoperable with 5 V logic
EIA RS-422 and RS-485 compliant over full
common-mode range
Data rate options
ADM3483/ADM3488: 250 kbps
ADM3485/ADM3490/ADM3491: 10 Mbps
Half- and full-duplex options
Reduced slew rates for low EMI (ADM3483 and ADM3488)
2 nA supply current in shutdown mode
(ADM3483/ADM3485/ADM3491)
Up to 32 transceivers on the bus
−7 V to +12 V bus common-mode range
Specified over the –40°C to +85°C temperature range
8 ns skew (ADM3485/ADM3490/ADM3491)
8-lead SOIC and 14-lead SOIC (ADM3491 only) packages
APPLICATIONS
Low power RS-485/RS-422 applications
Telecom
Industrial process control
HVAC
GENERAL DESCRIPTION
The ADM3483/ADM3485/ADM3488/ADM3490/ADM3491 are
low power, differential line transceivers designed to operate using a
single 3.3 V power supply. Low power consumption, coupled with a
shutdown mode, makes the ADM3483/ADM3485/ADM3488/
ADM3490/ADM3491 ideal for power-sensitive applications.
The ADM3488/ADM3490/ADM3491 feature full-duplex com-
munication, while the ADM3483/ADM3485 are designed for
half-duplex communication.
The ADM3483/ADM3488 feature slew rate limited drivers that
minimize EMI and reduce reflections caused by improperly ter-
minated cables, allowing error-free data transmission at data rates
up to 250 kbps.
The ADM3485/ADM3490/ADM3491 transmit at up to 10 Mbps.
The receiver input impedance is 12 kΩ, allowing up to 32 trans-
ceivers to be connected on the bus. A thermal shutdown circuit
prevents excessive power dissipation caused by bus contention or
by output shorting. If a significant temperature increase is detected
FUNCTIONAL BLOCK DIAGRAMS
VCC
ADM3483/
ADM3485
RO R
RE
DE
DI D
A
B
GND
Figure 1.
VCC
RO R
A
ADM3488/
ADM3490
B
Z
DI D
Y
GND
Figure 2.
ADM3491
RO R
A
RE B
DE
DI D
Z
Y
Figure 3.
in the internal driver circuitry during fault conditions, then the
thermal shutdown circuit forces the driver output into a high
impedance state. If the inputs are unconnected (floating), the
receiver contains a fail-safe feature that results in a logic high
output state. The parts are fully specified over the commercial
and industrial temperature ranges. The ADM3483/ADM3485/
ADM3488/ADM3490 are available in 8-lead SOIC_N; the
ADM3491 is available in a 14-lead SOIC_N.
Rev. E
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
www.analog.com
Fax: 781.461.3113 ©2005-2011 Analog Devices, Inc. All rights reserved.
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ADM3483 pdf, 반도체, 판매, 대치품
ADM3483/ADM3485/ADM3488/ADM3490/ADM3491
Data Sheet
SPECIFICATIONS
VCC = 3.3 V ± 0.3 V, TA = TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
DRIVER
Differential Output Voltage (VOD)
Δ |VOD| for Complementary Output States1
Common-Mode Output Voltage (VOC)
Δ |VOC| for Common-Mode Output Voltage1
DRIVER INPUT LOGIC
CMOS Input Logic Threshold Low (VIL)
CMOS Input Logic Threshold High (VIH)
CMOS Logic Input Current (IIN1)
Input Current—A, B (IIN2)
Min
2.0
1.5
1.5
2.0
Typ
Output Leakage—Y, Z (IO)
0.1
Max
0.2
3
0.2
0.8
±2
1.0
−0.8
−0.1
Output Leakage (Y, Z) in Shutdown Mode (IO)
0.01
−0.01
RECEIVER
Differential Input Threshold Voltage (VTH)
Input Hysteresis (Δ VTH)
CMOS Output Voltage High (VOH)
CMOS Output Voltage Low (VOL)
Three-State Output Leakage Current (IOZR)
Input Resistance (RIN)
POWER SUPPLY CURRENT
Supply Current (ICC)
Supply Current in Shutdown Mode (ISHDN)
Driver Short-Circuit Output Current (IOSD)
Receiver Short-Circuit Output Current (IOSR)
−0.2
VCC – 0.4
50
12
+0.2
0.4
±1
1.1 2.2
0.95 1.9
0.002 1
−250
250
±8 ±60
1VOD and VOC are the changes in VOD and VOC, respectively, when DI input changes state.
Unit Test Conditions/Comments
V RL = 100 Ω (RS-422), VCC = 3.3 V ± 5% (see Figure 17)
V RL = 54 Ω (RS-485) (see Figure 17)
V RL = 60 Ω (RS-485), VCC = 3.3 V (see Figure 18)
V RL = 54 Ω or 100 Ω (see Figure 17)
V RL = 54 Ω or 100 Ω (see Figure 17)
V RL = 54 Ω or 100 Ω (see Figure 17)
V DE, DI, RE
V DE, DI, RE
μA DE, DI, RE
mA VIN = 12 V, DE = 0 V, VCC = 0 V or 3.6 V
mA VIN = −7 V, DE = 0 V, VCC = 0 V or 3.6 V
μA VIN = 12 V, DE = 0 V, RE = 0 V, VCC = 0 V or 3.6 V,
ADM3491 only
μA VIN = −7 V, DE = 0 V, RE = 0 V, VCC = 0 V or 3.6 V,
ADM3491 only
μA VIN = 12 V, DE = 0 V, RE = VCC, VCC = 0 V or 3.6 V,
ADM3491 only
μA VIN = −7 V, DE = 0 V, RE = VCC, VCC = 0 V or 3.6 V,
ADM3491 only
V −7 V < VCM < +12 V
mV VCM = 0 V
V IOUT = −1.5 mA, VID = 200 mV (see Figure 19)
V IOUT = 2.5 mA, VID = 200 mV (see Figure 19)
μA VCC = 3.6 V, 0 V ≤ VOUT ≤ VCC
kΩ −7 V < VCM < +12 V
mA DE = VCC, RE = 0 V or VCC, no load, DI = 0 V or VCC
mA DE = 0 V, RE = 0 V, no load, DI = 0 V or VCC
μA DE = 0 V, RE = VCC, DI = VCC or 0 V
mA VOUT = −7 V
mA VOUT = 12 V
mA 0 V < VRO < VCC
Rev. E | Page 4 of 20
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ADM3483 전자부품, 판매, 대치품
Data Sheet
ADM3483/ADM3485/ADM3488/ADM3490/ADM3491
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 6.
Parameter
VCC to GND
Digital I/O Voltage (DE, RE, DI)
Digital I/O Voltage (RO)
Driver Output/Receiver Input Voltage
Operating Temperature Range
Storage Temperature Range
θJA Thermal Impedance
8-Lead SOIC
14-Lead SOIC
Lead Temperature
Soldering (10 sec)
Vapor Phase (60 sec)
Infrared (15 sec)
Rating
7V
−0.3 V to +6 V
VCC − 0.5 V to VCC + 0.5 V
−7.5 V to +12.5 V
−40°C to +85°C
−65°C to +125°C
121°C/W
86°C/W
300°C
215°C
220°C
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. E | Page 7 of 20
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