3.75 kV, 7-Channel,
SPIsolator Digital Isolators for SPI
Data Sheet
ADuM3151/ADuM3152/ADuM3153
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
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
ADuM3151
ENCODE
GND
GND
2
1
DECODE
DECODE
ENCODE
DECODE
MCLK
MO
3
18 SCLK
ENCODE
Three 250 kbps data channels
SI
4
17
16
DECODE
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
SO
MI
5
ENCODE
MSS
15 SSS
6
V
V
V
V
7
14
13
12
11
IA
OA
OB
IC
CONTROL
BLOCK
CONTROL
BLOCK
V
8
IB
V
9
OC
CSA Component Acceptance Notice 5A
VDE certificate of conformity
GND
GND
1
10
2
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
Figure 1. ADuM3151 Functional Block Diagram
V
IORM = 565 V peak
V
1
2
20
19
V
DD2
DD1
ADuM3152
ENCODE
APPLICATIONS
GND
1
GND
2
DECODE
DECODE
ENCODE
DECODE
Industrial programmable logic controllers (PLCs)
Sensor isolation
MCLK
MO
3
18 SCLK
ENCODE
SI
4
17
16
DECODE
SO
MI
5
GENERAL DESCRIPTION
ENCODE
MSS
15 SSS
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
6
V
V
V
V
7
14
13
12
11
IA
OA
IB
CONTROL
BLOCK
CONTROL
BLOCK
V
8
OB
V
9
OC
IC
SS
the CLK, MO/SI, MI/SO, and SPI bus signals supports SPI
GND
GND
1
10
2
clock rates of up to 17 MHz. These channels operate with 14 ns
propagation delay and 1 ns jitter to optimize timing for SPI.
Figure 2. ADuM3152 Functional Block Diagram
V
1
2
20
19
V
DD2
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.
DD1
ADuM3153
ENCODE
GND
1
GND
2
DECODE
DECODE
ENCODE
DECODE
MCLK
MO
3
18 SCLK
ENCODE
SI
4
17
16
15
14
13
12
11
DECODE
SO
SSS
MI
5
ENCODE
MSS
6
V
V
7
OA
IA
CONTROL
BLOCK
CONTROL
BLOCK
V
V
8
OB
IB
V
V
9
OC
IC
GND
GND
1
10
2
Figure 3. ADuM3153 Functional Block Diagram
1 Protected by U.S. Patents 5,952,849; 6,873,065; 6,262,600; and 7,075,329. Other patents are pending.
Rev. A
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