Analog Devices / Maxim Integrated MAX14948 RS-485/RS-422 Transceiver
Analog Devices MAX14948 RS-485/RS-422 Transceiver provides 5000VRMS (60s) of galvanic isolation between the cable side (RS-485/RS-422 driver/receiver side) and the UART-side of the device. Isolation improves communication by breaking ground loops and reduces noise when there are large differences in ground potential between ports. This device allows for robust communication up to 500kbps. The MAX14948 includes one half-duplex drive/receive channel. The receiver is a 1/8-unit load, allowing up to 256 transceivers on a common bus. Integrated true fail-safe circuitry ensures a logic high on the receiver output when inputs are shorted or open. Undervoltage lockout disables the driver when cable-side or UART-side power supplies are below functional levels.
The Analog Devices MAX14948 RS-485/RS-422 Transceiver is available in a wide-body 16-pin SO package and operates over the -40°C to +85°C temperature range.
Features
- Integrated Protection Ensure Robust Communication
- ±30kV ESD (HBM) on Driver Outputs/Receiver Inputs
- 5kVRMS Withstand Isolation Voltage for 60s (VISO)
- 1200VPEAK Maximum Repetitive Peak-Isolation Voltage (VIORM)
- 848VRMS Maximum Working-Isolation Voltage (VIOWM)
- > 30 Years Lifetime at Rated Working Voltage
- Withstands ±10kV Surge per IEC 61000-4-5
- Thermal Shutdown
- High-Performance Transceiver Enables Flexible Designs
- Integrated LDO for Cable-Side Power
- Compliant with RS-485/EIA-485 Standard
- 500kbps Maximum Data Rate
- Allows Up to 256 Devices on the Bus
Applications
- HVAC
- Industrial Automation Equipment
- Power Meters
- Programmable Logic Controllers
Development Tools
Analog Devices / Maxim Integrated MAX149X1EVKIT Evaluation Kit
Demonstrates the functionality of the MAX14938 isolated RS-485/Profibus™ transceiver.
Related Products
Analog Devices / Maxim Integrated MAX14945 RS-485/RS-422 Transceiver
Provides 2750VRMS of galvanic isolation between the cable side (RS-485/RS-422) and the UART side.
Analog Devices / Maxim Integrated MAX14941/MAX14942 RS-485/PROFIBUS-DP Transceivers
Provides 5000VRMS of galvanic isolation between the RS-485 driver/receiver side and the UART side.
Analog Devices / Maxim Integrated MAX14938/MAX14939 RS-485/PROFIBUS-DP Transceivers
Provides 2750VRMS of galvanic isolation between the RS-485 driver/receiver side and the UART side.
Block Diagram
Yayınlandı: 2016-12-02
| Güncellenmiş: 2023-04-11