LTC4332 Point-to-Point Rugged SPI Extender

Product Highlights > LTC4332 Point-to-Point Rugged SPI Extender

            LTC4332 Point-to-Point Rugged SPI Extender
                    Analog Devices' LTC4332 is an SPI extender over a rugged differential link
    

Image of Analog Devices' LTC4332 Point-to-Point Rugged SPI Extender ADI's LTC4332 is a point-to-point rugged SPI extender designed for operation in high-noise industrial environments over long distances. Using a ±60 V fault-protected differential transceiver, the LTC4332 can transmit SPI data, including an interrupt signal, up to 2 MHz 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.

The LTC4332 provides a control interface using a separate secondary select for configuration and fault monitoring.

Demonstration circuit DC2799A uses the LTC4332 to extend an SPI with three secondary devices to up to 1200 m (150 m with a 500 kHz SCK as factory configured). The DC2799A is designed to be compatible with the popular Pmod interface to allow for easy evaluation with the many primary and secondary devices in this ecosystem.

Features

2 MHz SCK over 10 m, operation to 1200 m
Three extended secondary selects
Protected from overvoltage line faults to ±60 V
±40 kV HBM ESD on link pins
IEC ESD ±6 kV and EFT ±4 kV on link pins
Extended common mode range: ±25 V

Extended interrupt
Separate programmable SPI modes
3 V to 5.5 V supply voltage
1.62 V to 5.5 V logic supply
4 mm × 5 mm 20-lead QFN package

Applications

Industrial control and sensors

Lighting and sound system controls

Extenders

Manufacturer Part Number	Description	Available Quantity	Price	View Details
LTC4332CUFD#PBF	SPI EXTEND OVER RUGGED DIFFERENT	0 - Immediate	$82.24	View Details
LTC4332IUFD#PBF	SPI EXTEND OVER RUGGED DIFFERENT	0 - Immediate	$88.49	View Details
LTC4332HUFD#PBF	SPI EXTEND OVER RUGGED DIFFERENT	0 - Immediate	$93.84	View Details