GENERAL DESCRIPTION

The ADuM31501 is a 6-channel SPIsolator? digital isolator 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 ADuM3150 isolator also provides two additional independent

low data rate isolation channels, one channel in each direction. Data in the slow channels is sampled and serialized for a 250 kbps data rate with 2.5 μs of jitter. The ADuM3150 supports a delay clock output on the master side of the device. This output can be used with an additional

clocked port on the master to support 40 MHz clock performance. See the Delay Clock section for more information.

FEATURES Supports up to 40 MHz SPI clock speed in delay clock mode Supports up to 17 MHz SPI clock speed in 4-wire mode 4 high speed, low propagation delay, SPI signal isolation

channels

2 data channels at 250 kbps

Delayed compensation clock line

20-lead SSOP 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 (PLC)

Sensor isolation