ADM1490EBRZ-REEL7

16 Mbps的ESD保护，全双工RS - 485收发器 16 Mbps, ESD Protected, Full-Duplex RS-485 Transceivers

Product Details

The ADM1490E/ADM1491E are RS-485/RS-422 transceivers with ±8 kV ESD protection and are suitable for high speed, full-duplex communication on multipoint transmission lines. In particular, the ADM1490E/ADM1491E are designed for use in motor control applications requiring communications at data rates up to 16 Mbps.

The ADM1490E/ADM1491E are designed for balanced transmission lines and comply with TIA/EIA-485-A-98. The devices each have 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 ADM1490E/ADM1491E operate 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 ADM1490E/ADM1491E contains a fail-safe feature that results in a logic high output state if the inputs are unconnected floating. The ADM1490E/ADM1491E feature extremely fast and closely matched switching times. Minimal driver propagation delays permit transmission at data rates up to 16 Mbps, and low skew minimizes EMI interference.

The ADM1490E/ADM1491E are fully specified over the commercial and industrial temperature ranges. The ADM1490E is available in two packages: a narrow body, 8-lead SOIC and an 8-lead MSOP. The ADM1491E is also available in two packages: a narrow body, 14-lead SOIC and a 10-lead MSOP.

**Applications**

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RS-485/RS-422 interfaces

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Industrial field networks

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High data rate motor control

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Multipoint data transmission systems

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Single-ended-to-differential signal conversion

### Features and Benefits

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RS-485/RS-422 full-duplex transceiver for high speed motor control applications

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16 Mbps data rate

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±8 kV ESD protection on RS-485 input/output pins

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Complies with ANSI/TIA/EIA-485-A-1998

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Open circuit fail-safe

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Suitable for 5 V power supply applications

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32 nodes on the bus 1 unit load

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Thermal shutdown protection

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Operating temperature range: −40°C to +85°C

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ADM1490E packages

Narrow body, 8-lead SOIC

8-lead MSOP

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ADM1491E packages

Narrow-body, 14-lead SOIC

10-lead MSOP