LTC4332

RECOMMENDED FOR NEW DESIGNS

SPI Extender Over Rugged Differential Link

Data Sheet (Rev. A) Product Selection Table

Part Models: 6
1ku List Price: Starting From $3.66

Viewing:

Overview

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

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

Documentation

Data Sheet 1

LTC4332: SPI Extender Over Rugged Differential Link Data Sheet (Rev.A) 10/19/2018

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC4332CUFD#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4332CUFD#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4332HUFD#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4332HUFD#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4332IUFD#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4332IUFD#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

Device Drivers 1

LTC4332 GitHub No-OS Driver Source Code

Tools & Simulations

IBIS Model 1

LTC4332 IBIS Model

Evaluation Kits

LTC4332 Demo Board | SPI Extender Over Rugged Differential Link

Buy Now View Details

Product Details

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).