3.75 kV, 7-Channel, SPIsolator
Multiple Slave, Digital Isolator for SPI
Data Sheet
ADuM3154
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Supports up to 17 MHz SPI clock speed
4 high speed, low propagation delay, SPI signal isolation
channels
V
1
2
20
19
V
DD2
DD1
ADuM3154
ENCODE
GND
GND
2
1
DECODE
DECODE
ENCODE
DECODE
MCLK
MO
3
18 SCLK
ENCODE
Supports up to 4 slave devices
SI
4
17
16
15
14
13
12
11
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
DECODE
SO
MI
5
ENCODE
MSS
SSA0
SSA1
NIC
SS0
SS1
SS2
SS3
GND
6
7
MUX
CONTROL
BLOCK
8
9
CSA Component Acceptance Notice 5A
VDE certificate of conformity
CONTROL
BLOCK
GND
1
10
2
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
NIC = NOT INTERNALLY CONNECTED
V
IORM = 565 V peak
Figure 1.
APPLICATIONS
Industrial programmable logic controllers (PLCs)
Sensor isolation
GENERAL DESCRIPTION
The ADuM31541 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
Table 1. Related Products
Product
ADuM3150
Description
3. 75 kV, high speed, clock
delayed SPIsolator
3.75 kV, multichannel SPIsolator
SS
jitter in the CLK, MO/SI, MI/SO, and SPI bus signals support
ADuM3151/ADuM3152/
ADuM3153
SPI clock rates of up to 17 MHz.
ADuM4150
5 kV, high speed, clock delayed
SPIsolator
5 kV, multichannel SPI solator
The ADuM3154 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.
ADuM4151/ADuM4152/
ADuM4153
ADuM4154
5 kV, multiple slave SPIsolator
1 Protected by U.S. Patents 5,952,849; 6,262,600; 6,873,065; and 7,075,329. Other patents are pending.
Rev. B Document Feedback
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