MAX4073EVKIT+ Maxim Integrated Products, MAX4073EVKIT+ Datasheet - Page 2

• Manufacturer Part Number: MAX4073EVKIT+
• Description: EVALUATION KIT FOR MAX4073
• Manufacturer: Maxim Integrated Products

Specifications of MAX4073EVKIT+

• Channels Per Ic: 1 - Single
• Amplifier Type: Current Sense
• Output Type: Single-Ended
• -3db Bandwidth: 1.7MHz
• Operating Temperature: -40°C ~ 125°C
• Current - Supply (main Ic): 500µA
• Voltage - Supply, Single/dual (±): 3 V ~ 28 V
• Board Type: Fully Populated
• Utilized Ic / Part: MAX4073
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output / Channel: -
• Slew Rate: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

• 12V, 1A power supply (VBAT)
• 5V power supply (VCC)
• Electronic load capable of sinking 1A
• Digital voltmeter (DVM)
The MAX4073 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on power supplies until all
connections are completed.
1) Set the input power supply to 12V. Connect the
2) Set the VCC power supply to 5V. Connect the
3) Set the electronic load to sink 1A.
4) Connect the electronic load’s ground to the GND
5) Connect the DVM across the OUT pad and the
6) Turn on the 5V power supply.
7) Turn on the 12V power supply.
8) Adjust the electronic load current (I
MAX4073 Evaluation Kit
2
ground of the power supply to the GND pad and
connect the positive terminal to the VSOURCE pad.
ground of the VCC supply to the GND pad and con-
nect the positive terminal to the VCC pad.
pad. Connect the load’s positive terminal to the
LOAD pad.
GND pad.
0A and 1A and verify that V
V
where V
the device (50V/V for MAX4073F).
_______________________________________________________________________________________
SENSE
according to the following equation:
SENSE
V
OUT
= I
Recommended Equipment
SENSE
= A
V
x R1 and A
x V
SENSE
OUT
Quick Start
is proportional to
SENSE
V
Procedure
is the gain of
) between
The MAX4073 EV kit is a current-sense amplifier that
measures the load current and provides an analog volt-
age output. The EV kit is installed with a MAX4073FAXK+,
which has a gain of 50V/V. With the installed current-
sense resistor (R
I
V
where I
the device. Set the full-scale output range by selecting
R
MAX4073.
The load current is measured as a voltage drop
(V
age is then amplified by the current-sense amplifier
and presented at the OUT pad. 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 the gain error
affects accuracy at large currents—both errors affect
accuracy at intermediate currents. By minimizing both
offset and gain errors, accuracy is optimized over a
wide dynamic range.
The MAX4073 EV kit can be used to evaluate other gain
versions of the MAX4073 (20V/V, 100V/V = T, H suffix).
Replace U1 with a different version of the MAX4073
and refer to Table 1. Recommended Component
Values in the MAX4073 IC data sheet for additional
information.
SENSE
OUT
SENSE
Detailed Description of Hardware
SENSE
is given by:
of 1A, the full-scale V
SENSE
) across an external sense resistor. This volt-
and the appropriate gain version of the
V
OUT
is the load current and A
Evaluating Other Gain Versions
SENSE
= A
Measuring the Load Current
V
) value of 0.07Ω, and a full-scale
x R
SENSE
SENSE
x I
is set to 70mV. The
SENSE
V
is the gain of