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MAX22344–MAX22346 Evaluation Kits
Evaluates: MAX22344–MAX22346
General Description
The MAX22344–MAX22346 evaluation kits (EV kits)
provide a proven design to evaluate the MAX22344–
MAX22346, reinforced, four-channel, galvanic digital
isolators. Two types of evaluation boards are available
to support different channel direction configurations and
different ENA polarities of the MAX22344–MAX22346
family. The MAX22345CSEVKIT# is fully assembled and
tested, and comes populated with the MAX22345CAAP+
(Figure
1).
The MAX2234XSEVKIT# is a generic board
which has U1 unpopulated allowing the user to select a
device from the MAX22344-MAX22346 family (Figure
2).
Both evaluation boards support the 20-pin SSOP package
type. See
Table 1
for EV kit options.
The EV kits should be powered from two independent
isolated power supplies with nominal output voltage in
range from 1.71V to 5.5V. For evaluating the electrical
parameters of the device without any isolation between
the two sides, a single power supply can also be used.
The MAX2234XSEVKIT# comes with U1 unpopulated and
supports the following digital isolators: MAX22344BAAP+,
MAX22344CAAP+, MAX22345BAAP+, MAX22345CAAP+,
MAX22345RAAP+, MAX22345SAAP+, MAX22346BAAP+,
MAX22346CAAP+.
Note:
When ordering the MAX2234XS EV kit, the engineer
should request a sample of the desired MAX22344-
MAX22346 isolator IC that can be soldered to the PCB.
Features
●
Broad Range of Data Transfer Rates (from DC to
200Mbps)
●
Four Unidirectional Channels with 3 Different
Channel Direction Configurations
●
SMA Connectors for Easy Connection to External
Equipment
●
Wide Power Supply Voltage Range from 1.71V to 5.5V
●
Guaranteed Up to 3.75kV
RMS
Isolation for 60s
●
-40°C to +125°C Temperature Range
●
Proven PCB Layout
Ordering Information
appears at end of data sheet.
Table 1. EV Kit Options
EVKIT PART #
MAX22345CSEVKIT#
MAX2234XSEVKIT#
TARGET DEVICE
MAX22345CAAP+
Not Populated
PACKAGE TYPE
20-Pin SSOP
20-Pin SSOP
COMMENT
200Mbps IC Populated
Request Samples of Target Device from Maxim
319-100166; Rev 1; 10/18
MAX22344–MAX22346 Evaluation Kits
Evaluates: MAX22344–MAX22346
Figure 1. MAX22345CS EV KIT
Figure 2. MAX2234XS EV KIT
Quick Start
Required Equipment
●
MAX22345CS, or MAX2234XS EV kit
●
MAX22344–MAX22346 device, if EV kit is not populated
●
Two DC power supplies with output range of 1.71V
to 5.5V
●
Signal/function generator
●
Oscilloscope
Procedure
The MAX22345CS EV kit is fully assembled and ready
for evaluation. The MAX2234XS EV kit has everything
except the DUT (U1) installed. The user can install the
desired version of the MAX22344–MAX22346 family of
reinforced, four-channel, unidirectional digital isolators.
Once installed, follow the steps below to verify board
functionality:
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MAX22344–MAX22346 Evaluation Kits
Evaluates: MAX22344–MAX22346
1)
Verify jumper settings. See
Table 2
for all shunt positions.
• J1 and J2 are closed.
• Jumper ENA is either in 1-2 position if U1 ENA (pin
8) has active-high polarity, or in 2-3 position if U1
ENA
(pin 8) has active-low polarity.
• Jumper ENB is in 1-2 position.
• Jumper DEFA and DEFB are in 2-3 position.
Connect one DC power supply between the EV kit’s
TP_VDDA and TP1_GNDA test points; connect the
other DC power supply between TP_VDDB and TP1_
GNDB test points.
Set both DC power supply outputs between 1.71V
and 5.5V, and then enable the power supply output.
Note:
It is also possible to power the EV kits from a
single power supply to test electrical parameters but
this invalidates the digital isolation of the IC.
4)
2)
Connect the signal/function generator to an input
SMA connector or test point of side A and observe
the isolated signal on the corresponding side B output,
using an oscilloscope. On the MAX22345CS EV kit,
SMA connectors A1, A2, A3, and B4 are inputs, and
SMA connectors B1, B2, B3, and A4 are outputs.
Refer to
Table 3
for the SMA connector I/O configura-
tions and jumper ENA configuration when a different
MAX22344–MAX22346 device is installed as U1 on
the MAX2234XS EV kit.
3)
Table 2. MAX2234XS EV Kits Board Connectors and Shunt Positions
CONNECTOR SHUNT POSITION
SIDE A
1
2
3
4
J3
5
6
7
8
9
10
A1 (SMA)
A2 (SMA)
A3 (SMA)
A4 (SMA)
J1
n/a
n/a
n/a
n/a
Open
1-2*
1-2
DEFA
2-3*
1-2*
ENA
2-3
Open
Test point or input header for V
DDA
Test point or input header for GNDA
Test point or input header for I/O; same as A1 SMA
Test point or input header for I/O; same as A2 SMA
Test point or input header for I/O; same as A3 SMA
Test point or input header for I/O; same as A4 SMA
Test point or input header for side A default control; same as DEFA jumper pin 2
Test point or input header for side A enable; same as ENA jumper pin 2
Test point or input header for GNDA
Test point or input header for GNDA
I/O on side A
I/O on side A
I/O on side A
I/O on side A
Use current meter to measure current of side A
Connect power supply to V
DDA
Connect side A default control pin to V
DDA
; side A output default is set to high. Jumper DEFA
must be set in the same position as DEFB
Connect side A default control pin to GNDA; side A output default is set to low. Jumper DEFA
must be set in the same position as DEFB. Default setting on MAX22345CSEVKIT#
Connect side A enable pin to V
DDA
; side A outputs are enabled if ENA is active-high (MAX2234_B/C),
or high-impedance if active-low (MAX22345R/S). Default setting on MAX22345CSEVKIT#
Connect side A enable pin to GNDA; side A outputs are high-impedance if ENA is active-high
(MAX2234_B/C), or enabled if active-low (MAX22345R/S)
Side A enable pin not connected; default setting on MAX2234XSEVKIT#
DESCRIPTION
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MAX22344–MAX22346 Evaluation Kits
Evaluates: MAX22344–MAX22346
Table 2. MAX2234XS EV Kits Board Connectors and Shunt Positions (continued)
CONNECTOR SHUNT POSITION
SIDE B
1
2
3
4
J4
5
6
7
8
9
10
B1 (SMA)
B2 (SMA)
B3 (SMA)
B4 (SMA)
J2
n/a
n/a
n/a
n/a
Open
1-2*
1-2
DEFB
2-3*
ENB
*Default configuration
1-2*
2-3
Test point or input header for V
DDB
Test point or input header for GNDB
Test point or input header for I/O; same as B1 SMA
Test point or input header for I/O; same as B2 SMA
Test point or input header for I/O; same as B3 SMA
Test point or input header for I/O; same as B4 SMA
Test point or input header for side B default control; same as DEFB jumper pin 2
Test point or input header for side B enable; same as ENB jumper pin 2
Test point or input header for GNDB
Test point or input header for GNDB
I/O on side B
I/O on side B
I/O on side B
I/O on side B
Use current meter to measure current of side B
Connect power supply to V
DDB
Connect side B default control pin to V
DDB
; side B output default is set to high. Jumper
DEFB must be set in the same position as DEFA
Connect side B default control pin to GNDB; side B output default is set to low. Jumper
DEFB must be set in the same position as DEFA. Default setting on MAX22345CSEVKIT#
Connect side B enable pin to V
DDB
; side B outputs are enabled. Default setting on
MAX22345CSEVKIT#
Connect side B enable pin to GNDB; side B outputs are high-impedance
DESCRIPTION
Table 3. MAX2234XS EV Kits Connector Configurations
CONNECTOR
SIDE A
A1 (SMA)
A2 (SMA)
A3 (SMA)
A4 (SMA)
J3 PIN 8, ENA PIN 2
SIDE B
B1 (SMA)
B2 (SMA)
B3 (SMA)
B4 (SMA)
J4 PIN 8, ENB PIN 2
OUT1
OUT2
OUT3
OUT4
ENB
OUT1
OUT2
OUT3
IN4
ENB
OUT1
OUT2
OUT3
IN4
ENB
OUT1
OUT2
IN3
IN4
ENB
IN1
IN2
IN3
IN4
ENA
IN1
IN2
IN3
OUT4
ENA
IN1
IN2
IN3
OUT4
ENA
IN1
IN2
OUT3
OUT4
ENA
U1 DEVICE
MAX22344B/C
MAX22345B/C
MAX22345R/S
MAX22346B/C
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MAX22344–MAX22346 Evaluation Kits
Evaluates: MAX22344–MAX22346
Detailed Description of Hardware
The MAX22344–MAX22346 EV kits allow the user to
evaluate the features of the MAX22344–MAX22346 four-
channel digital isolators.
External Power Supplies
and GNDA test points, and the other source between the
V
DDB
and GNDB test points. Each supply can be set
independently and can be present over the entire range
from +1.71V to +5.5V, regardless of the level or presence of
the other supply. The MAX22344–MAX22346 level-shift the
data, transmitting them across the isolation barrier.
Four SMA connectors on each side of the board allow
easy connections to signal generator(s) and oscilloscope.
A typical test setup is shown in
Figure 3.
Power to the MAX22345CS and MAX2234XS EV kits is
derived from two external sources which can both be between
+1.71V and +5.5V. Connect one source between the V
DDA
DC POWER SUPPLY
1.71V TO 5.5V
-
+
DC POWER SUPPLY
1.71V TO 5.5V
+
-
OSCILLOSCOPE
SIGNAL GENERATOR
OUT
C
Figure 3. MAX2234XS EV Kit Typical Test Setup
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