ADM2485 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

ADM2485
Manufacturer

ADI
ChipWorker Part#

CW543099200
Description

2.5kV Signal Isolated, High Speed (16Mbps), Half Duplex RS-485 Transceiver w/ Transformer Driver
Documentation

Datasheet

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ADM2485 Specifications

Attribute	Attribute Value

Part Number	ADM2485
Manufacturer	ADI
ChipWorker Part#	CW543099200
Documentation	Datasheet
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Product Lifecycle Status	Active

Product Description

Product Details
The ADM2485 differential bus transceiver is an integrated, galvanically isolated component designed for bidirectional data communication on multipoint bus transmission lines. It is designed for balanced transmission lines and complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E).
The device employs Analog Devices, Inc., iCoupler® technology to combine a 3-channel isolator, a three-state differential line driver, and a differential input receiver into a single package. An on-chip oscillator outputs a pair of square waveforms that drive an external transformer to provide isolated power with an external transformer. The logic side of the device can be powered with either a 5 V or a 3.3 V supply, and the bus side is powered with an isolated 5 V supply.
The ADM2485 driver has an active high enable. The driver differential outputs and the receiver differential inputs are connected internally to form a differential input/output port that imposes minimal loading on the bus when the driver is disabled or when VDD1 or VDD2 = 0 V. Also provided is an active high receiver disable that causes the receive output to enter a high impedance state.
The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention might cause excessive power dissipation. The part is fully specified over the industrial temperature range and is available in a 16-lead, wide-body SOIC package.
Applications
Isolated RS-485/RS-422 interfaces
PROFIBUS networks
Industrial field networks
Multipoint data transmission systems
### Features and Benefits
Half-duplex, isolated RS-485 transceiver
Integrated oscillator driver for external transformer
PROFIBUS® compliant
Complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E)
Data rate: 16 Mbps
5 V or 3.3 V operation (VDD1)
High common-mode transient immunity: >25 kV/μs
Wide-body, 16-lead SOIC package
50 nodes on bus
Isolated DE OUT status output
Thermal shutdown protection
Safety and regulatory approvals
UL recognition: 2500 V rms for 1 minute per UL 1577
VDE Certificate of Conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
Reinforced insulation, VIORM = 560 V peak
Operating temperature range: –40°C to +85°C
Wide-body, 16-lead SOIC package

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