ADM3488ARZ-REEL7

RS-422/RS-485 接口 IC 3.3V Low Pwr Full Duplex 250 kbps

Product Details

The ADM3483/ADM3485/ADM3488/ADM3490/ADM3491 are low power, differential line transceivers designed to operate using a single 3.3 V power supply. Low power consumption, coupled with a shutdown mode, makes the ADM3483/ADM3485/ADM3488/ ADM3490/ADM3491 ideal for power-sensitive applications.

The ADM3488/ADM3490/ADM3491 feature full-duplex communication, while the ADM3483/ADM3485 are designed for half-duplex communication.

The ADM3483/ADM3488 feature slew rate limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250 kbps.

The ADM3485/ADM3490/ADM3491 transmit at up to 10 Mbps. The receiver input impedance is 12 kΩ, allowing up to 32 trans-ceivers 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. If the inputs are unconnected floating, the receiver contains a fail-safe feature that results in a logic high output state. The parts are fully specified over the commercial and industrial temperature ranges. The ADM3483/ADM3485/ADM3488/ADM3490 are available in 8-lead SOIC_N; the ADM3491 is available in a 14-lead SOIC_N.

**Applications**

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Low-Power RS-485 Applications

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Telecom

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Industrial Process Control

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HVAC

### Features and Benefits

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Operate with 3.3 V supply

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Interoperable with 5 V logic

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EIA RS-485/RS-422 Compliant over Full Common-Range

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Data Rate Options: 250 kbps

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Half and Full Duplex Options

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Reduced Slew Rates for Low EMI

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Up to 32 Transceivers on a Bus

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-7V to +12V Bus Common Mode Range

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Specified over –40°C to +85°C Temperature Range

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Available in 8-Lead SOIC