5 kV, 7-Channel, SPIsolator
Multiple Slave, Digital Isolator for SPI
Data Sheet
FEATURES
Supports up to 17 MHz SPI clock speed
4 high speed, low propagation delay, SPI signal isolation
channels
Supports up to 4 slave devices
20-lead SOIC_IC package with 8.3 mm creepage
High temperature operation: 125°C
High common-mode transient immunity: >25 kV/µs
Safety and regulatory approvals
UL recognition per UL 1577
5000 V rms for 1 minute SOIC long package
CSA Component Acceptance Notice 5A
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
V
IORM
= 849 V peak
APPLICATIONS
Industrial programmable logic controllers (PLCs)
Sensor isolation
FUNCTIONAL BLOCK DIAGRAM
ENCODE
CONTROL
BLOCK
DECODE
DECODE
ENCODE
ENCODE
DECODE
ENCODE
DECODE
V
DD1
GND
1
MCLK
MO
MI
MSS
SSA0
SSA1
NIC
V
DD2
GND
2
SCLK
SI
SO
SS0
SS1
SS2
SS3
1
2
3
4
5
6
7
8
20
19
18
17
16
15
14
13
GND
1
GND
2
9
10
12
11
ADuM4154
CONTROL
BLOCK
MUX
12366-001
Figure 1.
GENERAL DESCRIPTION
The ADuM4154
1
is an SPIsolator™ digital isolator optimized for
a serial peripheral interface (SPI) that includes support for up to
four slave devices. Based on the Analog Devices, Inc., iCoupler®
chip scale transformer technology, the low propagation delay and
jitter in the CLK, MO/SI, MI/SO, and
SS
SPI bus signals support
SPI clock rates of up to 17 MHz.
The ADuM4154 isolator also provides a slave select multiplexing
system that allows up to four slave devices to be serviced from
one isolator. When a target slave is selected, the slave select
signal propagates to the desired output with low propagation
delay, allowing tight timing control. The isolated SSx is addressed
through a 250 kbps low speed, 2-channel address bus, allowing
the target slave device to be changed in as little as 2.5 µs.
Table 1. Related Products
ADuM3150 3.75 kV, high speed, clock delayed
SPIsolator
ADuM3151/ADuM3152/
ADuM3153
3.75 kV, multichannel SPIsolator
ADuM3154 3.75 kV, multiple slave SPIsolator
ADuM4150 5 kV, high speed, clock delayed
SPIsolator
ADuM4151/ADuM4152/
ADuM4153
5 kV, multichannel SPIsolator
1
Protected by U.S. Patents 5,952,849; 6,262,600; 6,873,065; and 7075329. Other patents are pending.
Rev. A
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