MAX9638EVKIT+ Maxim Integrated Products, MAX9638EVKIT+ Datasheet - Page 2

• Manufacturer Part Number: MAX9638EVKIT+
• Description: Amplifier Modules & Development Tools MAX9638 KIT MAX9638 KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX9638EVKIT+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MAX9638 Evaluation Kit
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The EV kit is fully assembled and tested. Follow the steps
below to verify board operation:
1) Connect the positive terminal of the power supply to
2) Connect the positive terminal of the precision voltage
3) Connect the INAM (TP1) to the GND pad.
4) Connect the DMM to monitor the voltage on OUTA
5) Turn on the 3.3V power supply.
6) Apply 100mV from the precision voltage source.
7) Apply 200mV from the precision voltage source.
Table 1. Jumper Descriptions (JU1–JU4)
*Default position.
2
the VDD pad and the ground terminal to the nearest
GND and VSS pads.
source to INAP (TP2). Connect the negative terminal
of the precision voltage source to the GND pad.
(TP4). With the 10kI feedback resistor (R5) and 1kI
series resistor (R1), the gain is 11 (noninverting con-
figuration).
Observe the output at OUTA on the DMM. OUTA
should read approximately 1.1V.
OUTA should read approximately 2.2V.
JUMPER
______________________________________________________________________________________
MAX9638 EV kit
3.3V DC power supply (e.g., Agilent E3620A)
Precision voltage source
Digital multimeter (DMM)
JU1
JU2
JU3
JU4
SHUNT POSITION
1-2*
1-2*
1-2*
1-2*
2-3
2-3
2-3
2-3
Required Equipment
Connects SHDNA of the device to VDD to put U1-A (op amp A) in normal operation.
Connects SHDNA of the device to VSS to put op amp A in shutdown mode.
Connects SHDNB of the device to VDD to put U1-B (op amp B) in normal operation.
Connects SHDNB of the device to VSS to put op amp B in shutdown mode.
Connects INA+ to INAP (TP2) through R2 and R8.
Connects INA+ to GND through R2 and R8.
Connects INB+ to INBP (TP6) through R12 and R16.
Connects INB+ to GND through R12 and R16.
Quick Start
Procedure
The MAX9638 EV kit provides a proven design to
evaluate the MAX9638 low-power, low-noise, CMOS
input op amp, which is suitable for photodiode tran-
simpedance front-ends in portable medical instruments.
The EV kit circuit is preconfigured as a noninverting
amplifier, but can easily be adapted to other topologies
by changing a few components.
The device is a single-supply op amp that is ideal for
differential sensing, noninverting amplification, buffering,
and filtering. A few common configurations are shown in
the next few sections.
The EV kit comes preconfigured as a noninverting ampli-
fier. The gain is set by the ratio of R5 and R1 for op amp
A and R10 and R15 for op amp B. The EV kit comes pre-
configured for a gain of 11 on both op amps. The output
voltage for the noninverting configuration is given by the
equation below:
Detailed Description of Hardware
DESCRIPTION
V
V
OUTB
OUTA
=
=
(1
(1
+
+
R10
R15
R5
R1
and
Op-Amp Configurations
Noninverting Configuration
)(V
)(V
INAP
INBP
+
+
V
V
OS
OS
)
)