LTC6820IMS#PBF

LTC6820 is an isoSPI isolated communications interface. It provides bidirectional SPI communications between two isolated devices through a single twisted pair connection. It encodes logic states into signals that are transmitted across an isolation barrier to another device. The receiving device decodes the transmission and drives the secondary bus to the appropriate logic states. The isolation barrier can be bridged by a simple pulse transformer to achieve hundreds of volts of isolation. This device drives differential signals using matched source and sink currents, eliminating the requirement for a transformer centre tap and reducing EMI. The drive currents and the comparator thresholds are set by a simple external resistor divider, allowing the system to be optimized for required cable lengths and desired signal-to-noise performance. It is widely used in application such as n industrial networking, battery monitoring systems, remote sensors etc.

• 1Mbps isolated SPI data communications, power supply range is 2.7V to 5.5V
• Simple galvanic isolation using standard transformers
• Supports cable lengths upto 100meters, interfaces to all logic from 1.7V to 5.5V
• Very low EMI susceptibility and emissions
• Configurable for high noise immunity or low power
• Engineered for ISO26262 compliant systems
• Requires no software changes in most SPI systems
• Ultralow, 2µA idle current, automatic wake-up detection
• Operating temperature is –40°C to 85°C
• Packaging style is 16-lead plastic MSOP

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