MAX9622EVKIT+ Maxim Integrated Products, MAX9622EVKIT+ Datasheet - Page 2

• Manufacturer Part Number: MAX9622EVKIT+
• Description: Amplifier Modules & Development Tools MAX9622 KIT MAX9622 KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX9622EVKIT+

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

MAX9622 Evaluation Kit
Note: Indicate that you are using the MAX9622 when contacting these component suppliers.
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The MAX9622 EV kit is fully assembled and test-
ed. Follow the steps below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
1)
2)
3)
4)
5)
6)
The MAX9622 EV kit provides a proven layout for the
MAX9622 precision, high-bandwidth op amp. The EV
kit circuit is preconfigured as a differential amplifier pro-
viding an overall gain of 10V/V. The signal is amplified
through the op amp with the gain set by resistors R5 and
R7. The device accepts a single-supply voltage from
2.0V to 5.5V.
The EV kit comes configured as a differential amplifier
with G = 10. Gain is set by a ratio of R7 to (R5 + R3) if
2
Murata Electronics North America, Inc.
TDK Corp.
Detailed Description of Hardware
______________________________________________________________________________________
2.0V to 5.5V, 10mA DC power supply (VCC)
Oscilloscope
Signal generator
This circuit requires a supply voltage of 2.0V to 5.5V.
For evaluation purposes, connect a 5.0V supply to
the pad labeled VCC.
Connect the power-supply ground to the GND PCB
pad.
Connect the OUT BNC connector to an oscillo-
scope.
Turn on the power supply.
Apply a signal at the IN BNC connector.
Verify the output signal on the oscilloscope.
SUPPLIER
Op-Amp Configuration
Differential Amplifier Gain
Required Equipment
Quick Start
Procedure
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PHONE
R6 = R7, R4 = R5, and R2 = R3. The gain is simply given
by the following equation (eq. 1):
The EV kit comes installed with R6 = R7 = 10kI, R4 =
R5 = 1kI, and R2 = R3 = 0I. IN is the input voltage
applied at the IN BNC connector. Modify the resistors as
required for different gains.
For a fully differential configuration, the tolerance of
resistors used greatly impacts the CMRR characteristics
of the board. Use 0.1% resistors for enhanced common-
mode rejection. To interface to a fully differential input
signal with a common mode other than the EV kit ground,
cut the trace connection between the power ground and
the circuit ground.
The EV kit can also be used to provide a simple nonin-
verting gain to the input signal. Remove R6 and change
R4 to a 0I resistor. The gain is then given by the follow-
ing equation (eq. 2):
where R7 is installed as a 10kI resistor, R5 is installed
as a 1kI resistor, R3 is a 0I PCB short, and V
input voltage at IN+ of the op amp. The EV kit provides
a gain of 11V/V.
Some applications require driving large capacitive
loads. To improve the stability of the amplifier in such
cases, replace resistor R8 with a suitable resistor value
to improve amplifier phase margin by isolating the load
capacitor. The R8/C4 lowpass filter can also be used
as an anti-alias filter or to limit amplifier output noise by
reducing its output bandwidth.
www.murata-northamerica.com
www.component.tdk.com
V
OUT
V
OUT
=
V
=
Component Suppliers
IN
IN
×
×



1
R5 R3
+
WEBSITE
R5 R3
R7
+
R7
+
Capacitive Loads
eq.1
Noninverting Gain



eq.2
IN
is the