ADM1491E 5 V, 16 Mbps, ESD Protected, Full-Duplex RS-485 Transceiver (with Driver/Receiver Enable)
The ADM1490E/ADM1491E are RS-485 transceivers with ±8 kV ESD protection and is suitable for high speed, full-duplex communication on multipoint transmission lines. In particular, the ADM1491E is designed for use in motor control applications requiring communications at data rates up to 16 Mbps.
The ADM1491E is designed for balanced transmission lines and complies with TIA/EIA-485-A-98. The device has a 12 kΩ receiver input impedance for unit load RS-485 operation allowing up to 32 nodes on the bus.
The differential transmitter outputs and receiver inputs feature electrostatic discharge circuitry that provides protection to ±8 kV using the human body model (HBM).
The ADM1491E operates from a single 5 V power supply. Excessive power dissipation caused by bus contention or output shorting is prevented by short-circuit protection and thermal circuitry.
Short-circuit protection circuits limit the maximum output current to ±250 mA during fault conditions. A thermal shutdown circuit senses if the die temperature rises above 150°C and forces the driver outputs into a high impedance state under this condition.
The receiver of the ADM1491E contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating).
The ADM1491E features extremely fast and closely matched switching times. Minimal driver propagation delays permit transmission at data rates up to 16 Mbps while low skew minimizes EMI interference.
The ADM1491E is fully specified over the commercial and industrial temperature ranges and is available in two packages: a narrow-body 14-lead SOIC and a 10-lead MSOP.
APPLICATIONS
RS-485/RS-422 interfaces
Industrial field networks
High data rate motor controlv
Multipoint data transmission systems
Single-ended to differential signal conversion
APPLICATIONS
- RS-485/RS-422 interfaces
- Industrial field networks
- High data rate motor controlv
- Multipoint data transmission systems
- Single-ended to differential signal conversion
Features and Benefits- RS-485/RS-422 full duplex transceiver, for high speed motor control applications
- 16 Mbps data rate
- ±8 kV ESD protection on RS-485 input/output pins
- Complies with ANSI/TIA/EIA-485-A-1998
- Open circuit fail-safe
- Suitable for 5 V power supply applications
- 32 nodes on the bus (1 unit load)
- Thermal shutdown protection
- Operating temperature range: −40°C to +85°C
- Packages
Narrow-body 14-lead SOIC
10-lead MSOP
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Data Sheets
Application Notes
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| ADM1491EBRMZ Production | 10 ld MSOP | OTH 50 | -40 to 85C | 1.41 | 1.2 | Y |
| ADM1491EBRMZ-REEL7 Production | 10 ld MSOP | REEL 1000 | -40 to 85C | 0 | 1.2 | Y |
| ADM1491EBRZ Production | 14 ld SOIC | OTH 56 | -40 to 85C | 1.35 | 1.15 | Y |
| ADM1491EBRZ-REEL7 Production | 14 ld SOIC | REEL 1000 | -40 to 85C | 0 | 1.15 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EVAL-RS485FDEBZ | Evaluation Board | 30 | Y |
Reference Materials
