Key Selection Information
| Parameter | Verified Information |
|---|---|
| Exact MPN | ADM485ARZ-REEL |
| Function | Half-duplex EIA RS-485 / RS-422 transceiver |
| Data Rate | 5 Mbps |
| Supply | Single 5 V supply |
| Bus Common-Mode Range | -7 V to +12 V |
| Protection | Thermal shutdown and short-circuit protection |
| Operating Temperature | -40?C to +85?C |
| Package | 8-lead SOIC_N (R-8) |
| Manufacturer Status | Production |
Product Overview
ADM485ARZ-REEL is the reel-packed 8-lead SOIC orderable version of Analog Devices’ ADM485, a 5 Mbps half-duplex differential transceiver for RS-485 and RS-422 multipoint buses. The device integrates one driver and one receiver with independently controlled enable functions, allowing the bus outputs to enter a high-impedance state when disabled.
The combination of 5 Mbps signaling, a single 5 V supply, a -7 V to +12 V bus common-mode range, and built-in thermal and short-circuit protection makes the ADM485 suitable for conventional industrial multidrop serial links where the surrounding termination, biasing and cable topology are designed for RS-485/RS-422.
Design Considerations
- Match termination and fail-safe biasing to the actual bus topology rather than treating the transceiver alone as the complete RS-485 interface.
- Check cable length and node loading against the required 5 Mbps data rate.
- The ARZ orderable uses the 8-lead SOIC package and the -40?C to +85?C temperature grade; nearby J-grade orderables use a different temperature range.
For the same 5 V ADM485 half-duplex RS-485 transceiver function in a smaller 8-lead MSOP rather than this 8-lead SOIC order code, compare ADM485ARMZ-REEL7. Analog Devices lists the ADM485 ARZ and ARMZ package families separately; preserve the full ordering suffix and check PCB land pattern, assembly and thermal constraints before changing packages.
Related Engineering Resources
Alternative Candidates for Engineering Evaluation
| MPN | Manufacturer | Relationship |
|---|---|---|
| ADM485ARZ | Analog Devices | Same ADM485 SOIC orderable family; verify packing requirement before substitution |
Candidate alternatives require engineering and procurement verification before substitution.
Quality & Verification Support
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