Analog Devices EVAL-MAX49918 User Manual

General Description
The MAX49918 evaluation kit (EV kit) is a fully tested and
assembled circuit that demonstrates the capabilities of
the MAX49918, a high-precision, wide measurement
range, programmable gain, bidirectional current-sense
amplifier that monitors two distinct current levels.
The gain of MAX49918 is programmed by I2C
communication.
The MAX49918 EV kit operates over the automotive
temperature range of -40°C to +125°C.
The EV kit reserves a PCB footprint so that a
MAX32625PICO board can be soldered on it. With the
MAX32625PICO board, users can control the gain
conveniently with the GUI software.
Features
•
Programmable Gain Options through I2C from 10V/V
to 200V/V (8 steps)
•
±1μV (typ) Input Offset Voltage for REF1 = REF2 =
VDD/2
•
±5μV (typ) Input Offset Voltage for REF1 = VDD and
REF2 = GND for Gain = 20V/V
•
±0.01% (typ) Gain Error
•
-5V to +70V Input Voltage Range
•
-6V to +80V Protective Immunity
•
70kHz, -3dB Bandwidth for Gain = 20V/V
•
145dB DC CMRR
•
Rail-to-Rail Output
•
3mm x 3mm TDFN-10 Package
•
-40°C to +125°C Temperature Range
MAX49918 EV Kit Files
FILE
max49918_tdfn10_evkit_a_
MARKETING_SCH.pdf
MAX49918_TDFN10_EVKIT_A
_MARKETING_PCB.PDF
marketing_bom_max49918_tdf
n10_evkit_a.csv
max49918_tdfn10_evkit_a.brd
Ordering Information appears at end of data sheet.
Windows is a registered trademark and registered service mark
of Microsoft Corporation.
319-101014; Rev 0; 7/23
O n e A n a l o g W a y , W i l m i n g t o n , M A 0 1 8 8 7 - 2 3 5 6 , U . S . A .
EVAL-MAX49918 Evaluation Kit
DESCRIPTION
EV Kit Schematic
EV Kit PCB Layout
EV Kit Bill of Materials
EV Kit PCB Layout file
DOCUMENT FEEDBACK
T e l : 7 8 1 . 3 2 9 . 4 7 0 0
Evaluation Board User Guide
Quick Start
Required Equipment
•
MAX49918 EV kit
•
0 to 70V DC power supply for VCM input
•
+3.3V, 100mA DC power supply
•
Electronic load capable of sinking 3A
•
One 6½ digital multimeter (DMM like 34401A)
•
One 8½ digital multimeter (DMM like Agilent 3458)
Optional Equipment
•
MAX32625PICO Board
• ®
Windows 10 PC
•
MAX49918EV kit GUI software
Procedure
The MAX49918 EV kit is fully assembled and tested.
Follow the steps to verify board operation: Caution: Do not
turn on the power supply or the electronic load until all the
connections are complete.
1. Connect a +3.3V power supply to the VDD connector,
and the ground of this power supply to the GND
connector.
2. Connect the positive terminal of the 0 to 100V DC
(VCM) power supply to the VSENSE+ input and the
negative terminal to the GND connector.
3. Set the VCM power supply to 50V.
4. Set the electronic load to sink 300mA.
5. Connect the positive terminal of the electronic load to
the VSENSE- input and the negative terminal of the
electronic load to the GND of the VCM power supply.
6. Connect REF1 to REF2.
7. Connect the positive terminal of the DC power supply
to the REF1/REF2 input. Set the DC power supply
voltage output to VDD/2 = 1.65V.
8. Connect the 8½ digital multimeter between the test
points RS+ and RS- to measure the differential input
voltage across the inputs (VSENSE).
9. Connect the 6½ digital multimeter across the VOUT
and REF1/REF2 test points to measure the MAX49918
output.
10. Turn on the power supplies, then the electronic load.
11. Enable the electronic load.
12. Verify that the 8½ digital multimeter displays 300mA x
50mΩ = +15mV and the 6½ digital multimeter displays
150mV.
13. The EV kit is now ready for further testing.
14. After the functions are verified, do not forget to turn off
the electronic load, calibrator, and power supply.
© 2 0 2 3 A n a l o g D e v i c e s , I n c . A l l r i g h t s r e s e r v e d .
Evaluates: MAX49918
TECHNICAL SUPPORT