Texas Instruments ISO1644DWEVM, Руководство пользователя

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4 EVM Setup and Operation
CAUTION
Note that this EVM is for operating-parameter performance evaluation only and not designed for
isolation voltage testing. Any voltage applied above the 5.5-V maximum recommended operating
voltage of the isolators may damage the EVM.
This section describes the setup and operation of the EVM for parameter-performance evaluation. Figure 4-1
shows the basic setup of the EVM with two power supplies needed to evaluate isolator performance. Power
this EVM by connecting voltages to VCC1 and VCC2 that are within the
Recommended Operating Range in the
ISO1642/ISO1643/ISO1644 device data sheet. Typical voltage levels for the VCC1 and VCC2 supplies are 3.3 V
and 5 V. Separate power supplies can be used to provide each supply voltage, and they do not need to have the
same value. If both sides are to be evaluated at the same supply voltage, only one power supply is required and
can power both sides of the EVM.
+
±
GND1
SCL1
GND1
SDA1
Vcc1
SCL2
SDA2
GND2
Vcc2
+
±
Digital
Input
Oscilloscope
5 V 5V
GND2
CHA_1
CHB_1
CHC_1
CHA_2
CHB_2
CHC_2
GND2
SCL1
VCC2 VCC1
SCL2
GND1
SDA1
SDA2
Iso
la
ti
o
n
16
15
14
13
9
10
11
12
1
2
3
4
8
7
6
5
INA
INB
GND1
OUTC
GND2
OUTB
OUTA
INC
ISO1644DW
Figure 4-1. Basic ISO1644DWEVM Operation
Although the ISO1642, ISO1643, and ISO1644 devices feature bidirectional data channels, the devices perform
optimally when side 1 (SDA1 and SCL1) is connected to a single controller or node of an I2C network while side
2 (SDA2 and SCL2) is connected to the I2C bus. Please note that bidirectional clocks can be used on these
devices.
5 Bill of Materials
Table 5-1 lists the bill of materials (BOM) for ISO1644DWEVM.
Table 5-1. ISO1644DWEVM EVM Bill of Materials
Item Qty. Designator Description Manufacturer Part Number
1 2 C1, C4 CAP, CERM, 10 uF, 35 V, ±10%, X5R, 0805 MuRata GRM21BR6YA106KE43L
2 2 C3, C6 CAP, CERM, 0.1 uF, 25 V, ±5%, X7R, 0603 AVX 06033C104JAT2A
3 2 J1, J2 Header, 100mil, 7x2, SMT Molex 15912140
4 4 R1, R2, R3, R4
RES, 3.3 k, 5%, 0.125 W, AEC-Q200 Grade 0,
0805
Vishay-Dale CRCW08053K30JNEA
5 16
TP1, TP2, TP3,
TP4, TP5, TP6,
TP7, TP8, TP9,
TP10, TP11, TP12,
TP13, TP14, TP15,
TP16
Test Point, Miniature, SMT Keystone 5019
6 4 H9, H10, H11, H12 Bumpon, Hemisphere, 0.44 X 0.20, Clear 3M SJ-5303 (CLEAR)
7 1 U1
IC, Hot-swappable bidirectional I2C isolator
with GPIO and enhanced EMC
Texas Instruments ISO1644DWR
EVM Setup and Operation www.ti.com
4 ISO1644DWEVM Reinforced Isolated I
2
C With GPIOs Evaluation Module SLLU329 – JUNE 2021
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