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ADM3490

Analog Devices
Part Number ADM3490
Manufacturer Analog Devices
Description RS-485/RS-422 Transceivers
Published Nov 11, 2013
Detailed Description 3.3 V Slew Rate Limited, Half- and Full-Duplex, RS-485/RS-422 Transceivers Data Sheet FEATURES Operate with 3.3 V supply...
Datasheet PDF File ADM3490 PDF File

ADM3490
ADM3490


Overview
3.
3 V Slew Rate Limited, Half- and Full-Duplex, RS-485/RS-422 Transceivers Data Sheet 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 ADM3483/ADM3485/ADM3488/ADM3490/ADM3491 FUNCTIONAL BLOCK DIAGRAMS VCC ADM3483/ ADM3485 RO RE DE DI D R A B 05524-027 GND Figure 1.
VCC A B RO R APPLICATIONS Low power RS-485/RS-422 applications Telecom Industrial process control HVAC DI ADM3488/ ADM3490 Z Y GND 05524-026 05524-025 D Figure 2.
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 communication, 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 terminated 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 transceivers 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 RO RE DE DI ADM3491 R A B Z D Y Figure 3.
in the internal driver circuitry during fault c...


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