ADUM3154 Datasheet, PDF (1/22 Pages) Analog Devices – 3.75 kV, 7-Channel, SPIsolator Multiple Slave, Digital Isolator for SPI

Data Sheet
3.75 kV, 7-Channel, SPIsolator
Multiple Slave, Digital Isolator for SPI
ADuM3154
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 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
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
jitter in the CLK, MO/SI, MI/SO, and SS SPI bus signals support
SPI clock rates of up to 17 MHz.
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.
FUNCTIONAL BLOCK DIAGRAM
V_DD1 1
GND₁ 2
MCLK 3
MO 4
MI 5
MSS 6
ADuM3154
ENCODE
ENCODE
DECODE
ENCODE
SSA0 7
SSA1 8
NIC 9
CONTROL
BLOCK
GND₁ 10
DECODE
DECODE
ENCODE
DECODE
MUX
CONTROL
BLOCK
NIC = NOT INTERNALLY CONNECTED
Figure 1.
20 V_DD2
19 GND₂
18 SCLK
17 SI
16 SO
15 SS0
14 SS1
13 SS2
12 SS3
11 GND₂
Table 1. Related Products
Product
Description
ADuM3150
3. 75 kV, high speed, clock
delayed SPIsolator
ADuM3151/ADuM3152/ 3.75 kV, multichannel SPIsolator
ADuM3153
ADuM4150
5 kV, high speed, clock delayed
SPIsolator
ADuM4151/ADuM4152/ 5 kV, multichannel SPI solator
ADuM4153
ADuM4154
5 kV, multiple slave 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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