ADUM4154 Datasheet, PDF (14/22 Pages) Analog Devices – 5 kV, 7-Channel, SPIsolator Multiple Slave, Digital Isolator for SPI

ADuM4154
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Data Sheet
V_DD1 1
GND₁ 2
MCLK 3
MO 4
MI 5
MSS 6
SSA0 7
SSA1 8
NIC 9
GND₁ 10
ADuM4154
TOP VIEW
(Not to Scale)
20 V_DD2
19 GND₂
18 SCLK
17 SI
16 SO
15 SS0
14 SS1
13 SS2
12 SS3
11 GND₂
NOTES
1. NIC = NOT INTERNALLY CONNECTED. THIS PIN
IS NOT INTERNALLY CONNECTED AND SERVES
NO FUNCTION IN THE ADuM4154.
Figure 3. Pin Configuration
Table 17. Pin Function Descriptions
Pin No. Mnemonic Direction Description
1
VDD1
Power Input Power Supply for Isolator Side 1. A bypass capacitor from VDD1 to GND1 to local ground is required.
2, 10 GND1
Return Ground 1. Ground reference for Isolator Side 1.
3
MCLK
Input
SPI Clock from the Master Controller.
4
MO
Input
SPI Data from the Master to the Slave MO/SI Line.
5
MI
Output SPI Data from the Slave to the Master MI/SO Line.
6
MSS
Input
Slave Select from the Master. This signal uses an active low logic. The slave select pin can require as
much as a 10 ns setup time from the next clock or data edge depending on the speed grade.
7
SSA0
Input
Multiplexer Selection Input, Low Order Bit.
8
SSA1
Input
Multiplexer Selection Input, High Order Bit.
9
NIC
Not Internally Connected. This pin is not internally connected and serves no function in the ADuM4154.
11, 19 GND2
Return Ground 2. Ground reference for Isolator Side 2.
12
SS3
Output Routed Slave Select Signal 3. High-Z when SS3 is not selected.
13
SS2
Output Routed Slave Select Signal 2. High-Z when SS2 is not selected.
14
SS1
Output Routed Slave Select Signal 1. High-Z when SS1 is not selected.
15
SS0
Output Routed Slave Select Signal 0. High-Z when SS0 is not selected.
16
SO
Input
SPI Data from the Slave to the Master MI/SO Line.
17
SI
Output SPI Data from the Master to the Slave MO/SI Line.
18
SCLK
Output SPI Clock from the Master Controller.
20
VDD2
Power Input Power Supply for Isolator Side 2. A bypass capacitor from VDD2 to GND2 to local ground is required.
Rev. A | Page 14 of 22