Evaluates: MAX40010
MAX40010 Evaluation Kit
General Description
The MAX40010 evaluation kit (EV kit) provides a proven
design to evaluate the MAX40010 dual-channel, high-
precision, high-voltage, current-sense amplifier. This EV kit
demonstrates the MAX40010 in a 5-PIN SOT-23 package.
The EV kit PCB comes with a MAX40010TAWT+ installed,
which is the 20V/V gain version. Other gain options are
available. Contact the factory for the pin-compatible
MAX40010LAWT+ (G = 12.5V/V), MAX40010FAWT+
(G = 50V/V), and MAX40010HAWT+ (G = 100V/V).
EV Kit Contents
● MAX40010 EV Kit Board
Features
● Precision, Real-Time Current Monitoring
● +2.7V to +76V Input Common-Mode Range
● Proven PCB Layout
● Fully Assembled and Tested
19-8671; Rev 0; 10/16
Ordering Information appears at end of data sheet.
Quick Start
Required Equipment
The following items are required for operation:
• MAX40010 EV kit
• +3.3V, 1A DC power supply
• +5V, 3A DC power supply
• An electronic load capable of sinking 3A (i.e., HP6060B)
• Two digital voltmeters
Procedure
The MAX40010 EV kit is fully assembled and tested.
Follow the steps below to verify the board operation.
Caution: Do not turn on power supply or the electronic
load until all connections are made.
1) Connect the positive terminal of the +3.3V supply to
the VDD test point and the negative terminal of the
supply to the nearest GND test point.
2) Connect the positive terminal of the +5V supply to the
VSENSE+ test point and the negative terminal of the
supply to the nearest GND test point.
3) Set the electronic load to sink 2.5A.
4) Connect the positive terminal of the electronic load to
the VSENSE- test point and the negative terminal of
the supply to the nearest GND test point.
5) Connect the first voltmeter between test points RS+
and RS- to measure V
SENSE
.
6) Connect the second voltmeter between VOUT and the
nearest GND test points.
7) Turn on the power supplies.
8) Enable the electronic load.
9) Verify that the first voltmeter displays 125mV and the
second voltmeter displays 2.5V.
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Evaluates: MAX40010
MAX40010 Evaluation Kit
Detailed Description of Hardware
The MAX40010 EV kit provides a proven design to evaluate
the MAX40010 high-side, dual-channel, current-sense
amplifier, which offers precision accuracy specifications of
input offset voltage (V
OS
) less than 12µV (max) and gain
error less than 0.1% (max).
Applying the V
RS+
Supply and the Load
The EV kit is installed with a MAX40010TAWT+, which
has a 20V/V gain. The current-sense resistors (R
SENSE
)
value is 0.05Ω with ±0.5% tolerance. The V
OUT
for each
channel given by:
V
OUT
=
I
LOAD
x R
SENSE
x A
V
where A
V
is the gain and I
LOAD
is the current load applied
to the device. Normal operating V
RS+
and V
RS-
range is
2.7V to 76V.
Measuring the Load Current
The load current is measured as a voltage drop (V
SENSE
)
across an external sense resistor. This voltage is then
amplified by the current-sense amplifier and presented
at its VOUT pin. Like all differential amplifiers, the output
voltage has two components of error (an offset error and
a gain error). The offset error affects accuracy at low currents
and a gain error affects accuracy at large currents—both
errors effect accuracy at intermediate currents. By
minimizing both offset and gain errors, accuracy can be
optimized over a wide dynamic range.
ITEM REF_DES DNI/DNP QTY MFG PART # MANUFACTURER VALUE DESCRIPTION COMMENTS
1 C1 - 1
C0603C104K4RAC;
GCM188R71C104KA37;
C1608X7R1C104K; GRM188R71C104K;
C0603X7R160-104KNE
KEMET/MURATA/TDK/
VENKEL LTD.
0.1UF
CAPACITOR; SMT (0603); CERAMIC CHIP;
0.1UF; 16V; TOL=10%; TG=-55 DEGC TO
+125 DEGC; TC=X7R;
2 C2 - 1 GRM21BR71C475KA73 MURATA 4.7UF
CAPACITOR; SMT (0805); CERAMIC CHIP;
4.7UF; 16V; TOL=10%; MODEL=GRM SERIES;
TG=-55 DEGC TO +125 DEGC; TC=X7R
3 GND, TP1-TP4 - 5 5011 KEYSTONE N/A
TEST POINT; PIN DIA=0.125IN;
TOTAL LENGTH=0.445IN;
BOARD HOLE=0.063IN; BLACK;
PHOSPHOR BRONZE WIRE
SILVER PLATE FINISH;
4 R1 - 1 LVK12R050DE OHMITE MFG CO. 0.05
RESISTOR; 1206; 0.05 OHM; 0.5%;
50PPM; 0.5W; METAL FILM
5 RS+, RS- - 2 5000 KEYSTONE N/A
TEST POINT; PIN DIA=0.1IN;
TOTAL LENGTH=0.3IN;
BOARD HOLE=0.04IN; RED;
PHOSPHOR BRONZE WIRE
SILVER PLATE FINISH;
6 U1 - 1 MAX40010TAUT+ MAXIM MAX40010TAUT+
EVKIT PART-IC; MAX40010TAUT+;
PACKAGE OUTLINE: 21-0058;
PACKAGE CODE: U6SN-1; SOT6
7
VDD, VOUT,
VSENSE+,
VSENSE-
- 4 5010 KEYSTONE N/A
TESTPOINT WITH 1.80MM HOLE DIA,
RED, MULTIPURPOSE;
8 C3, C4, C7 DNP 0 C1206C102K1RAC KEMET 1000PF
CAPACITOR; SMT (1206); CERAMIC CHIP;
1000PF; 100V; TOL=10%;
TG=-55 DEGC TO +125 DEGC; TC=X7R
9 C9 DNP 0 C0603C181K5GAC KEMET 180PF
CAPACITOR; SMT (0603); CERAMIC CHIP;
180PF; 50V; TOL=10%; MODEL=C0G;
TG=-55 DEGC TO +125 DEGC; TC=+/
10 R3, R4, R7 DNP 0
CRCW06030000ZS; MCR03EZPJ000;
ERJ-3GEY0R00
VISHAY DALE/ROHM
/PANASONIC
0
RESISTOR; 0603; 0 OHM; 0%;
JUMPER; 0.10W; THICK FILM
11 PCB - 1 MAX40010 MAXIM PCB PCB Board:MAX40010 EVALUATION KIT
MAX40010 EV Kit Bill of Materials