ADM3485EARZ RS-422/RS-485 Interface IC 3 VOLT RS-485 HIGH ESD I.C.
♠ Product Description
| Product Attribute | Attribute Value |
| Manufacturer: | Analog Devices Inc. |
| Product Category: | RS-422/RS-485 Interface IC |
| Series: | ADM3485E |
| Mounting Style: | SMD/SMT |
| Package / Case: | SOIC-8 |
| Function: | Transceiver |
| Number of Drivers: | 1 Driver |
| Number of Receivers: | 1 Receiver |
| Data Rate: | 10 Mb/s |
| Supply Voltage - Max: | 3.3 V |
| Supply Voltage - Min: | 3.3 V |
| Minimum Operating Temperature: | - 40 C |
| Maximum Operating Temperature: | + 85 C |
| Packaging: | Tube |
| Brand: | Analog Devices |
| Development Kit: | EVAL-CN0313-SDPZ |
| Duplex: | Half Duplex |
| ESD Protection: | ESD Protection |
| Height: | 1.5 mm (Max) |
| Length: | 5 mm (Max) |
| Number of I/Os: | 1 |
| Number of Input Lines: | 10 at RS-422, 32 at RS-485 |
| Number of Output Lines: | 1 |
| Operating Supply Current: | 2.2 mA |
| Operating Supply Voltage: | 3.3 V |
| Output Type: | 3-State |
| Product Type: | RS-422/RS-485 Interface IC |
| Shutdown: | Shutdown |
| Factory Pack Quantity: | 98 |
| Subcategory: | Interface ICs |
| Width: | 4 mm (Max) |
| Unit Weight: | 0.019048 oz |
♠ ±15 kV ESD-Protected, 3.3 V,12 Mbps, EIA RS-485/RS-422 Transceiver
The ADM3485E is a 3.3 V, low power data transceiver with ±15 kV ESD protection, suitable for half-duplex communication on multipoint bus transmission lines. The ADM3485E is designed for balanced data transmission and complies with TIA/EIA standards RS485 and RS-422. The ADM3485E is a half-duplex transceiver that shares differential lines and has separate enable inputs for the driver and the receiver.
The devices have a 12 kΩ receiver input impedance, which allows up to 32 transceivers on a bus. Because only one driver should be enabled at any time, the output of a disabled or powered-down driver is tristated to avoid overloading the bus.
The receiver has a fail-safe feature that ensures a logic high output when the inputs are floating. Excessive power dissipation caused by bus contention or by output shorting is prevented with a thermal shutdown circuit.
The part is fully specified over the industrial temperature range and is available in an 8-lead narrow SOIC package.
• TIA/EIA RS-485/RS-422 compliant
• ±15 kV ESD protection on RS-485 input/output pins
• 12 Mbps data rate
• Half-duplex transceiver
• Up to 32 nodes on the bus
• Receiver open-circuit, fail-safe design
• Low power shutdown current
• Outputs high-Z when disabled or powered off
• Common-mode input range: −7 V to +12 V
• Thermal shutdown and short-circuit protection
• Industry-standard 75176 pinout
• 8-lead narrow SOIC package
• Power/energy metering
• Telecommunications
• EMI-sensitive systems
• Industrial control
• Local area networks
