(ADM3483E - ADM3491E) low power data transceivers
Description
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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
FUNCTIONAL BLOCK DIAGRAMS
VCC
ADM3483E/ ADM3486E
RO RE DE DI D
06284-001
R A B
GND
Figure 1.
VCC
ADM3488E/ ADM3490E
RO R A
B
APPLICATIONS
Power/energy metering Telecommunications EMI-sensitive systems Industrial control Local area networks
DI D Z Y
06284-002
GND
Figure 2.
VCC
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.
ADM3491E
RO RE DE DI D Z Y
06284-003
R
A
B
GND
Figure 3.
(continued on Page 3)
Rev.
A
Information furnished ...
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