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부품번호 | ADM3486E 기능 |
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기능 | (ADM3483E - ADM3491E) low power data transceivers | ||
제조업체 | Analog Devices | ||
로고 | |||
전체 20 페이지수
www.DataSheet4U.com
3.3 V, ±15 kV ESD-Protected, Half- and
Full-Duplex, RS-485/RS-422 Transceivers
ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
FEATURES
TIA/EIA RS-485/RS-422 compliant
±15 kV ESD protection on RS-485 input/output pins
Data rates
ADM3483E/ADM3488E: 250 kbps
ADM3486E: 2.5 Mbps
ADM3490E/ADM3491E: 12 Mbps
Half- and full-duplex options
Up to 32 nodes on the bus
Receiver open-circuit, fail-safe design
Low power shutdown current
(ADM3483E/ADM3486E/ADM3491E only)
Outputs high-Z when disabled or powered off
Common-mode input range: −7 V to +12 V
Thermal shutdown and short-circuit protection
Industry-standard 75176 pinout
8-lead and 14-lead narrow SOIC packages
APPLICATIONS
Power/energy metering
Telecommunications
EMI-sensitive systems
Industrial control
Local area networks
GENERAL DESCRIPTION
The ADM3483E/ADM3486E/ADM3488E/ADM3490E/
ADM3491E are 3.3 V, low power data transceivers with
±15 kV ESD protection suitable for full- and half-duplex
communication on multipoint bus transmission lines. They
are designed for balanced data transmission, and they
comply with TIA/EIA standards RS485 and RS-422. The
ADM3483E/ADM3486E are half-duplex transceivers that
share differential lines and have separate enable inputs for
the driver and receiver. The full-duplex ADM3488E/
ADM3490E/ADM3491E transceivers have dedicated
differential line driver outputs and receiver inputs. The
ADM3491E also features separate enable inputs for the
driver and receiver.
The devices have a 12 kΩ receiver input impedance,
which allows up to 32 transceivers on a bus. Because only
one driver should be enabled at any time, the output of a
disabled or powered-down driver is tristated to avoid
overloading the bus.
FUNCTIONAL BLOCK DIAGRAMS
VCC
ADM3483E/
ADM3486E
RO R
RE
DE
DI D
A
B
GND
Figure 1.
VCC
ADM3488E/
ADM3490E
A
RO
R
B
DI D
Z
Y
GND
Figure 2.
VCC
ADM3491E
RO R
RE
DE
DI D
A
B
Z
Y
GND
Figure 3.
Rev. A
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.
(continued on Page 3)
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
©2006 Analog Devices, Inc. All rights reserved.
www.DataSheet4U.com
ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
SPECIFICATIONS
VCC = 3.3 V ± 0.3 V, TA = TMIN to TMAX, unless otherwise noted.
Table 2. ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
Parameter
Symbol Min
Typ
DRIVER
Differential Outputs
Differential Output Voltage
VOD 2.0
1.5
1.5
Δ|VOD| for Complementary Output States1 ∆VOD
Common-Mode Output Voltage
VOC
Δ|VOC| for Complementary Output States1 ∆VOC
Short-Circuit Output Current
IOSD −250
Output Leakage (Y, Z) (ADM3491E Only)
Normal Mode
IO
Max Unit
V
V
V
0.2 V
3V
0.2 V
mA
250 mA
20 μA
−20 μA
Shutdown Mode
1 μA
−1 μA
Logic Inputs
Input High Voltage
Input Low Voltage
Logic Input Current
RECEIVER
Differential Inputs
Differential Input Threshold Voltage
Input Hysteresis
Input Resistance (A, B)
Input Current (A, B)
RO Logic Output
Output High Voltage
Output Low Voltage
Short-Circuit Output Current
Tristate Output Leakage Current
POWER SUPPLY
Voltage Range
Supply Current
VIH 2.0
VIL
IIN1
V
0.8 V
±2 μA
VTH
∆VTH
RIN
IIN2
VOH
VOL
IOSR
IOZR
VCC
ICC
−0.2
50
12
−0.8
VCC − 0.4
±8
3.0
1.1
0.2 V
mV
kΩ
1.0 mA
mA
V
0.4 V
±60 mA
±1 μA
3.6 V
2.2 mA
0.95 1.9 mA
Shutdown Current
ESD PROTECTION
A, B, Y, Z Pins
All Pins Except A, B, Y, Z Pins
ISHDN
0.002 1
±15
±4
1 Δ|VOD| and Δ|VOC| are the changes in VOD and VOC, respectively, when DI input changes state.
μA
kV
kV
Test Conditions/Comments
RL = 100 Ω (RS-422) (see Figure 7)
RL = 54 Ω (RS-485) (see Figure 7)
RL = 60 Ω (RS-485) (see Figure 8)
RL = 54 Ω or 100 Ω (see Figure 7)
RL = 54 Ω or 100 Ω (see Figure 7)
RL = 54 Ω or 100 Ω (see Figure 7)
VOUT = −7 V
VOUT = 12 V
DE = 0 V, RE = 0 V, VCC = 0 V or 3.6 V,
VOUT = 12 V
DE = 0 V, RE = 0 V, VCC = 0 V or 3.6 V,
VOUT = −7 V
DE = 0 V, RE = VCC, VCC = 0 V or 3.6 V,
VOUT = 12 V
DE = 0 V, RE = VCC, VCC = 0 V or 3.6 V,
VOUT = −7 V
DE, DI, RE
DE, DI, RE
DE, DI, RE
−7 V < VCM < +12 V
VCM = 0 V
−7 V < VCM < +12 V
DE = 0 V, VCC = 0 V or 3.6 V, VIN = 12 V
DE = 0 V, VCC = 0 V or 3.6 V, VIN = −7 V
IOUT = −1.5 mA, VID = 200 mV (see Figure 9)
IOUT = 2.5 mA, VID = 200 mV (see Figure 9)
0 V < VRO < VCC
VCC = 3.6 V, 0 V < VOUT < VCC
No load, DI = 0 V or VCC, DE = VCC,
RE = 0 V or VCC
No load, DI = 0 V or VCC, DE = 0 V,
RE = 0 V
DE = 0 V, RE = VCC, DI = 0 V or VCC
Human body model
Human body model
Rev. A | Page 4 of 20
4페이지 www.DataSheet4U.com
ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 7.
Parameter
VCC to GND
Digital Input/Output Voltage (DE, RE, DI)
Receiver Output Voltage (RO)
Driver Output (A, B, Y, Z)/Receiver Input
(A, B) Voltage
Driver Output Current
Operating Temperature Range
Storage Temperature Range
θJA Thermal Impedance
8-Lead SOIC_N
14-Lead SOIC_N
Lead Temperature, Soldering (20 sec)
Rating
−0.3 V to +6 V
−0.3 V to +6 V
−0.3 V to (VCC + 0.3 V)
−8 V to +13 V
±250 mA
−40°C to +85°C
−65°C to +150°C
158°C/W
120°C/W
260°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. A | Page 7 of 20
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ADM3486E | (ADM3483E - ADM3491E) low power data transceivers | Analog Devices |
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