_______________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX9943 Evaluation Kit
Evaluates: MAX9943
General Description
The MAX9943 evaluation kit (EV kit) is a fully assembled
and tested PCB that evaluates the MAX9943 high-
voltage, precision, low drift, and low-power op amp.
Features
S Flexible Input and Output Configurations
S +6V to +38V Single Supply Range
S ±3V to ±19V Dual Supply Range
S Fully Assembled and Tested
Ordering Information
19-5086; Rev 0; 12/09
+Denotes lead(Pb)-free and RoHS compliant.
Component List
Component Suppliers
Note: Indicate that you are using the MAX9943 when contacting these component suppliers.
*EP = Exposed pad.
PART TYPE
MAX9943EVKIT+ EV Kit
DESIGNATION QTY DESCRIPTION
C1, C2 2
10FF Q20%, 25V tantalum
capacitors (C size)
AVX TAJC106M025R
C3, C4 2
0.1FF Q10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H104K
C5 0 Not installed, capacitor (0603)
GND 5 Multipurpose test points, black
JU1, JU2 2 3-pin headers
OUT, VIN-, VIN+ 3 Multipurpose test points, white
R1, R2 2
1kI Q5% resistors (0603)
SUPPLIER PHONE WEBSITE
AVX Corporation 843-946-0238 www.avxcorp.com
Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com
DESIGNATION QTY DESCRIPTION
R3 1
0I Q5% resistor (0603)
R4 0
Not installed, 1W through-hole
resistor
U1 1
High-voltage, precision, low-
power op amp (6 TDFN-EP*)
Maxim MAX9943ATT+
VCC, VEE 2 Multipurpose test points, red
— 1
PCB: MAX9943 EVALUATION
KIT+
MAX9943 Evaluation Kit
Evaluates: MAX9943
2 ______________________________________________________________________________________
Quick Start
Required Equipment
• MAX9943 EV kit
• +15V power supply (VCC)
• -15V power supply (VEE)
• Waveform generator
�� Oscilloscope
Procedure
The MAX9943 EV kit is fully assembled and tested.
Follow the steps below to verify board operation:
1) Verify that all jumpers are in their default positions,
as shown in Table 1.
2) Set the VCC power-supply output to +15V. Disable
the output.
3) Set the VEE power-supply output to -15V. Disable
the output.
4) Set the waveform-generator output to 1kHz sine
wave, V
P-P
= +3V. Disable the output.
5) Connect the positive terminal of the VCC power
supply to the VCC test point. Connect the ground
terminal of the VCC power supply to the GND test
point.
6) Connect the negative terminal of the VEE power
supply to the VEE test point. Connect the ground
terminal of the VEE power supply to the GND test
point.
7) Connect the waveform-generator output to the VIN+
test point.
8) Connect the waveform-generator ground to the
GND test point.
9) Connect the positive input of the oscilloscope to the
OUT test point.
10) Connect the negative input of the oscilloscope to
the GND test point.
11) Enable the VCC and VEE power supplies.
12) Enable the waveform-generator output.
13) Verify that V
OUT
= 2 x V
VIN+
or a 6V
P-P
sine wave.
Detailed Description of Hardware
Power Supplies
The MAX9943 EV kit can operate with dual supplies from
Q3V to Q19V, or with a single supply from +6V to +38V
with respect to ground. Appropriate bypass capacitors
are provided to the VCC and VEE power-supply inputs.
Input and Output Configurations
The EV kit provides jumpers JU1 and JU2 for flexible
input configurations. For noninverting-amplifier configu-
ration, place shunts on pins 1-2 of JU1 and pins 2-3 of
JU2. For inverting-amplifier configuration, place shunts
on pins 1-2 of JU2 and pins 2-3 of JU1. Table 1 summa-
rizes the functions of JU1 and JU2.
Capacitive-Load Driving
The EV kit provides the C5 and R3 footprints for optional
capacitive-load driving circuit. C5 simulates the capaci-
tive load while R3 acts as the isolation resistor to improve
the op amp’s stability at higher capacitive loads. For
additional details, refer to the Capacitive Load Stability
section in the MAX9943 IC data sheet.
Table 1. Jumper Descriptions (JU1, JU2)
*Default position.
CONFIGURATION JUMPER
SHUNT
POSITIONS
DESCRIPTION
Noninverting
JU1 1-2*
where V
VIN+
is the voltage applied at the VIN+ test point.
JU2 2-3*
Inverting
JU1 2-3
where V
VIN-
is the voltage applied at the VIN- test point.
JU2 1-2
OUT VIN
R2
V 1 x V
R1
+
= +
OUT VIN
R2
V – x V
R1
=
-