Datasheet
MAX9926U Evaluation Kit
Evaluates: MAX9926U
2 ______________________________________________________________________________________
Quick Start
Required Equipment
• MAX9926U EV kit
• 5V, 100mA power supply
• Oscilloscope
• Function generator
Procedure
The MAX9926U 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) Verify that shunts are installed on their respective
jumper, as shown in Table 1.
2) Connect the 5V power supply to the VCC pad and the
power supply’s ground to the GND pad.
3) Turn on the power supply.
4) Using the oscilloscope, measure the signal at the
COUT1 or COUT2 and GND pads, which should be a
2.5kHz square waveform with amplitude of 5V.
5) Connect the function generator to the SENSE1+ and
SENSE1- PCB pads.
6) Turn on the function generator and set it for an output
of a DC offset of 2.5V DC, triangle wave with a fre-
quency of 2.5kHz, and a 50% duty cycle.
7) The EV kit circuit is ready for further evaluation using
two VR or magnetic pickup sensors. See the Jumper
Selection section for configuring the EV kit circuit.
Detailed Description of Hardware
The MAX9926U EV kit features a dual-channel differ-
ential VR sensor interface circuit using a MAX9926U IC
in a 16-pin QSOP surface-mount package. The EV kit’s
dual-channel interface circuit can evaluate signals from
differential or single-ended sensors. The interface circuit
provides a gain of 1 and can evaluate differential sensor
signal amplitudes of 50mV
P-P
to 300V
P-P
with a 5Hz to
25kHz frequency range. Power for the EV kit circuit can
be supplied by a 4.5V to 5.5V DC source, which provides
at least 100mA.
The MAX9926U EV kit circuit can be configured to dem-
onstrate the MAX9926U Modes A1, A2, or B operation.
Resistor-capacitor networks R10, R11, C4 provide a
VCC/2 source to the BIAS1 and BIAS2 inputs, respec-
tively, for evaluating Mode B. Refer to the Mode Selection
section in the MAX9926U IC data sheet for additional
Table 1. Default Jumper Configuration (JU1–JU10)
Component Suppliers
Note: Indicate that you are using the MAX9926U when contacting these component suppliers.
SUPPLIER PHONE WEBSITE
Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com
Panasonic Corp. 800-344-2112 www.panasonic.com
JUMPER SHUNT POSITION JUMPER CONFIGURATION
JU1 Installed Channel 1, single-ended sensor
JU2 1-2 Channel 1, Mode A1 mode of operation
JU3 1-2 Channel 2, Mode A1 mode of operation
JU4 Installed Channel 2, single-ended sensor
JU5 1-2 Channel 1, Mode A1 mode of operation
JU6 1-2 Channel 1, Mode A1 mode of operation
JU7 Not installed Mode A1 mode of operation
JU8 1-2 Channel 2, Mode A1 mode of operation
JU9 1-2 Channel 2, Mode A1 mode of operation
JU10 Installed V_PULL VCC powered