LTC4332
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LTC4332

SPI Extender Over Rugged Differential Link

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 6
1ku List Price Starting From $3.66
Features
  • 2MHz SCK Over 10m, Operation Up to 1200m
  • Three Extended Slave Selects
  • Protected from Overvoltage Lines Fault to ±60V
  • ±40kV HBM ESD on Link Pins
  • IEC ESD ±6kV and EFT ±4kV on Link Pins
  • Extended Common Mode Range: ±25V
  • Extended Interrupt
  • Separate Programmable SPI Modes
  • 3V to 5.5V Supply Voltage
  • 1.62V to 5.5V Logic Supply
  • 4mm × 5mm 20-Lead QFN Package
Additional Details
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The LTC4332 is a point-to-point rugged SPI extender designed for operation in high noise industrial environments over long distances. Using a ±60V fault protected differential transceiver, the LTC4332 can transmit SPI data, including an interrupt signal, up to 2MHz over two twisted pair cables. The extended common mode range and high common mode rejection on the differential link provides tolerance to large ground differences between nodes.

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

Applications

  • Industrial Control and Sensors
  • Lighting and Sound System Control
Part Models 6
1ku List Price Starting From $3.66

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Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC4332CUFD#PBF
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LTC4332CUFD#TRPBF
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LTC4332HUFD#PBF
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LTC4332HUFD#TRPBF
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LTC4332IUFD#PBF
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LTC4332IUFD#TRPBF
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Software and Part Ecosystem

Software and Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2799A

LTC4332 Demo Board | SPI Extender Over Rugged Differential Link

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DC2799A

LTC4332 Demo Board | SPI Extender Over Rugged Differential Link

LTC4332 Demo Board | SPI Extender Over Rugged Differential Link

Product Detail

Demonstration circuit 2799A uses the LTC4332 to extend a SPI interface with 3 slave devices to up to 1200m (150m with a 500kHz SCK as factory configured). The DC2799A is designed to be compatible with the popular Pmod interface to allow for easy evaluation with the many master and slave devices in this ecosystem.

The LTC4332 is a 2MHz SPI bus extender designed for operation in high noise industrial environments. The SPI bus is extended over two twisted pairs by ±60V fault protected differential transceivers. The LTC4332’s extended 25V common mode voltage range allows it to bridge across different ground potentials.

The DC2799A’s local side interfaces with the host SPI master as 4 different SPI slave devices. These slave devices support SPI modes (0,0) or (1,1) where (CPOL, CPHA). Three of the slave devices are associated with the remote side devices (SS1, SS2, SS3) and the fourth device (SSC) is used to configure the DC2799A’s LTC4332 SPI extenders. The DC2799A’s remote side interface implements a SPI master with 3 different slave selects. The remote side master supports all four SPI modes and a unique mode may be associated to each slave select.

By default, the remote SPI modes are all mode (0,0). The remote side SPI modes are configured by writing to the local side LTC4332 using the SSC slave device.

The LTC4332 data sheet gives a complete description of the part, its operation and application information. The data sheet should be referred to when reading this demo manual. The LTC4332 is available in a 20-lead QFN package and three temperature grades (commercial 0°C to 70°C, industrial –40°C to 85°C, and high temperature –40°C to 125°C).

 
Tools & Simulations

Tools & Simulations 1

Reference Designs

Reference Designs 1

Figure 1. Simplified Block Diagram of EVAL-CN0564-ARDZ

Robust SPI/I2C Communications for Long Distance Industrial Applications

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