GENERAL DESCRIPTION

The ADuM3151/ADuM3152/ADuM31531 are 7-channel, SPIsolator? digital isolators optimized for isolated serial peripheral interfaces (SPIs). Based on the Analog Devices, Inc., iCoupler? chip scale transformer technology, the low propagation delay in the CLK, MO/SI, MI/SO, and SS SPI bus signals supports SPI clock rates of up to 17 MHz. These channels operate with 14 ns propagation delay and 1 ns jitter to optimize timing for SPI.

The ADuM3151/ADuM3152/ADuM3153 isolators also provide three additional independent low data rate isolation channels in three different channel direction combinations. Data in the slow channels is sampled and serialized for a 250 kbps data rate with up to 2.5 μs of jitter in the low speed channels.

FEATURES

Supports up to 17 MHz SPI clock speed

4 high speed, low propagation delay, SPI signal isolation channels

Three 250 kbps data channels

20-lead SSOP package with 5.1 mm creepage

High temperature operation: 125°C

High common-mode transient immunity: >25 kV/μs

Safety and regulatory approvals

UL recognition per UL 1577

3750 V rms for 1 minute

CSA Component Acceptance Notice 5A

VDE certificate of conformity

DIN V VDE V 0884-10 (VDE V 0884-10):2006-12

VIORM = 565 V peak

APPLICATIONS

Industrial programmable logic controllers (PLCs)

Sensor isolation