Analog Devices Inc. LTC4332 SPI Extender Over Rugged Differential Link
Analog Devices LTC4332 SPI Extender over a rugged differential link is designed for operation in high noise industrial environments over long distances. The LTC4332 can transmit SPI data, including an interrupt signal, using a ±60V fault protected differential transceiver up to 2MHz over two twisted-pair cables.
The extended common-mode range and high common-mode rejection on the differential link provide tolerance to large ground differences between nodes. Additionally, the LTC4332 SPI Extender also supports external galvanic isolation on the link. The device offers a control interface using a separate slave select for configuration and fault monitoring. The LTC4332 is available in a 20-lead QFN package with three temperature grade options (commercial 0°C to 70°C, industrial –40°C to 85°C, and high temperature –40°C to 125°C).
Features
- 2MHz SCK over 10m, operation up to 600m
- Three extended slave selects
- Protected from overvoltage lines fault to ±60V
- ±40kV ESD on link pins
- IEC level 4 ESD ±8kV and EFT ±5kV on link pins
- ±25V Extended common-mode range
- Extended interrupt
- Separate programmable SPI modes
- Link galvanic isolation supported
- 3V to 5.5V supply voltage
- 1.62V to 5.5V logic supply
- 4mm × 5mm 20-lead QFN package
Applications
- Industrial control and sensors
- Lighting and sound system control
Evaluation Board
Analog Devices Inc. DC2799A Demo Board for LTC4332
Extends an SPI interface with 3 slave devices to up to 1200m or 150m with a 500kHz SCK.
TYPICAL APPLICATION
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