ADM3493 3.3 V, ⅛ Load, Low Power, RS-485/RS-422 Transceiver (Half Duplex, 250 kbps, Slew Rate Limited, DE/RE)
The ADM3493 is a low power, differential line transceiver designed to operate using a single 3.3 V power supply. Low power consumption, coupled with a shutdown mode, makes it ideal for power-sensitive
applications. The ADM3493 is suitable for communication on multipoint bus transmission lines.
The device contains one driver and one receiver. Designed for half-duplex communication, the ADM3493 features a slew rate limited driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250 kbps.
The receiver input impedance is 96 kΩ, allowing up to 256 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 in the internal driver circuitry during fault conditions then the thermal shutdown circuit forces the driver output into a high impedance state. The receiver contains a fail-safe feature that results in a logic high output state, if the inputs are unconnected (floating).
The ADM3493 is fully specified over the commercial and industrial temperature ranges and is available in an 8-lead SOIC.
Features and Benefits- Operates with 3.3 V Supply
- Interoperable with 5 V Logic
- EIA RS-422 and RS-485 Compliant over Full CM Range
- Data Rate: 250 kbps
- Half Duplex Transceiver
- Reduced Slew Rates for Low EMI
- 2 nA Supply Current in Shutdown Mode
- Up to 256 Transceivers on a Bus
- −7 V to +12 V Bus Common-mode Range
- Specified over −40°C to +85°C Temperature Range
- 8 ns Skew
- Available in 8-lead SOIC
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Data Sheets
Application Notes
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| ADM3493ARZ Production | 8 ld SOIC | OTH 98 | -40 to 85C | 1.06 | 0.96 | Y |
| ADM3493ARZ-REEL7 Production | 8 ld SOIC | REEL 1000 | -40 to 85C | 0 | 0.96 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EVAL-RS485HDEBZ | Standard Half-Duplex RS-485 Evaluation Board | 30 | Y |
Reference Materials
