Analog Devices Inc. ADM4853 RS-485/RS-422 Transceiver
Analog Devices ADM4853 RS-485/RS-422 differential line transceiver is designed for high-speed, half-duplex and full-duplex data communication on multipoint bus transmission lines. The transceiver provides balanced data transmission and complies with EIA Standards RS-485 and RS-422. This half-duplex transceiver shares differential lines and has separate enable inputs for the driver and receiver. The transceiver provides a 1/8-unit load receiver input impedance. This allows up to 256 transceivers on one bus. Only one driver is enabled at a given time.
The disabled or powered down driver's output is three-stated to avoid overloading the bus. The receiver inputs include a true fail-safe feature. The fail-safe feature ensures a logic high output level when the inputs are shorted or open. This guarantees that the receiver outputs are in a known state before communication begins and when communication ends. The driver outputs are slew-rate limited to reduce EMI and data errors caused by reflections from improperly terminated buses. A thermal shutdown circuit prevents excessive power dissipation caused by bus contention or by output shorting.
Features
- Electronics industries alliance (EIA) RS-485/RS-422 compliant
- Data rate: 10Mbps
- Half-duplex and full-duplex options
- Reduced slew rates for low electromagnetic interference (EMI)
- True fail-safe receiver inputs
- 5μA (maximum) supply current in shutdown mode
- Up to 256 transceivers on one bus
- Outputs high-Z when disabled or powered off
- -7V to +12V bus common-mode range
- Thermal shutdown and short-circuit protection
- Specified over the -40°C to +85°C temperature range
- Qualified for automotive applications
Applications
- Low power RS-485 applications
- EMI sensitive systems
- DTE to DCE interfaces
- Industrial control
- Packet switching
- Local area networks
- Level translators
Functional Block Diagram
Learn More
Analog Devices Inc. 介面及隔離產品
提供介面及隔離產品，包括數位隔離器、收發器及隔離式ADC。
發佈日期: 2016-10-31
| 更新日期: 2022-03-11