Contact the factory for free samples of the pin-compat-
ible MAX7408–MAX7415/MAX7418–MAX7425 SCFs to
evaluate these devices.
S
Lead(Pb)-Free and RoHS Compliant
S
Proven PCB Layout
Features
S
CLK Pad for External Clock Frequency
Ordering Information
PART
MAXFILTERBRD+
+Denotes
lead(Pb)-free and RoHS compliant.
TYPE
EV Kit
Part Selection Table
PART
MAX7408CUA+
MAX7409CUA+
MAX7410CUA+
MAX7411CUA+
MAX7412CUA+
MAX7413CUA+
MAX7414CUA+
MAX7415CUA+
MAX7418CUA+
MAX7419CUA+
MAX7420CUA+
MAX7421CUA+
MAX7422CUA+
MAX7423CUA+
MAX7424CUA+
MAX7425CUA+
OPERATING
VOLTAGE
5V
5V
5V
5V
3V
3V
3V
3V
5V
5V
5V
5V
3V
3V
3V
3V
FILTER TYPE
Elliptic
Bessel
Butterworth
Elliptic
Elliptic
Bessel
Butterworth
Elliptic
Elliptic
Bessel
Butterworth
Elliptic
Elliptic
Bessel
Butterworth
Elliptic
U1
—
JU1, JU2
R1
C3, C4
C2
C1
DESIGNATION
Component List
(Suggested Components)
QTY
0
DESCRIPTION
Not installed, 47pF
Q5%,
50V
C0G ceramic capacitor (0805)
Murata GRM2165C1H470J or
similar
Not installed, 2200pF
Q5%,
50V
C0G ceramic capacitor (0805)
Murata GRM2165C1H222J or
similar
Not installed, 0.1FF
Q10%,
16V
X7R ceramic capacitors (0603)
Murata GCM188R71C104K or
similar
Not installed, 2-pin headers—
shorted by PC trace
Not installed, 10kI
Q1%
resistor
(0805)
Not installed, lowpass SCF
(8
FMAX
M
)
See the
Part Selection Table
PCB: MAXFILTERBRD+
0
0
0
0
Note:
Contact the factory to order a free sample of any of the
SCF parts.
0
1
Component Supplier
SUPPLIER
Murata Electronics North America, Inc.
PHONE
770-436-1300
WEBSITE
www.murata-northamerica.com
Note:
Indicate that you are using the MAXFILTERBRD when contacting this component supplier.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-4884; Rev 0; 8/09
MAXFILTERBRD
Evaluates: MAX7408–MAX7415/
MAX7418–MAX7425
OSCILLOSCOPE
Tektronix TDS3012
OR SIMILAR
SINE-WAVE INPUT
FUNCTION GENERATOR 1
SINE-WAVE FREQUENCY:
0.001kHz TO 15kHz
AMPLITUDE: 4V
P-P
MAX
OFFSET: 2.2V
DC
TYPICAL
EXTERNAL CLOCK
MAXFILTERBRD
EV KIT
FILTER’S SINE-WAVE OUTPUT
Agilent 33120A OR SIMILAR
GND
POWER SUPPLY
+5V/+3V
HP E3610 OR SIMILAR
Figure 1. Filter Evaluation Test Block Diagram
Quick Start
• MAXFILTERBRD
Required Equipment
• Suggested components (see the
Component List)
• 5V or 3V DC power supply (depending on the IC
installed)
• Function generator (e.g., HP 33120A)
• 2-channel digital oscilloscope (e.g., Tektronix TDS3012)
Caution:
Do not turn on power supply until all connec-
tions are completed.
1) Install all suggested components shown in the
Component List
onto the MAXFILTERBRD.
2) If the installed IC is the MAX7408–MAX7411 or
MAX7418–MAX7421, connect the positive terminal of
the 5V supply to the VDD pad and the negative termi-
nal of the supply to the GND pad closest to the VDD
pad. If the installed IC is the MAX7412–MAX7415 or
MAX7422–MAX7425, connect the positive terminal
of the 3V supply to the VDD pad and the negative
terminal of the supply to the GND pad closest to the
VDD pad (see Figure 1). Set the function generator
to 4V
P-P
max, 2.2V offset (typ), and 1kHz sine wave,
and connect the signal to the IN pad.
3) Connect the first channel of the oscilloscope to the
IN pad.
4) Connect the second channel of the oscilloscope to
the OUT pad.
5) Connect the oscilloscope’s ground probe to any GND
pads.
6) Turn on the power supply.
7) Verify the output on the OUT pad.
Procedure
2
Maxim Integrated
MAXFILTERBRD
Evaluates: MAX7408–MAX7415/
MAX7418–MAX7425
Detailed Description of Hardware
The MAXFILTERBRD is an unpopulated PCB design to
evaluate the MAX7408–MAX7415/MAX7418–MAX7425
5th-order, lowpass SCFs.
The MAXFILTERBRD uses the internal oscillator when a
capacitor is installed on C1. Refer to the corresponding
installed IC data sheet.
For the MAX7409/MAX7410/MAX7413/MAX7414, the
frequency can be altered using the following formula:
f
OSC
(kHz) = k/C1 (pF)
where k = 30 x 10
3
and f
OSC
is the internal oscillator
frequency.
For the MAX7408/MAX7411/MAX7412/MAX7415, k = 27 x 10
3
.
For the MAX7418/MAX7421/MAX7422/MAX7425, k = 87 x 10
3
.
For the MAX7419/MAX7420/MAX7423/MAX7424, k = 110 x 10
3
.
An external clock that matches the specification of the
corresponding IC data sheet can be used by cutting
the trace of jumper JU2. Drive the CLK pin with a CMOS
gate powered from 0 to VDD. Apply the clock signal to
the CLK pad.
The MAXFILTERBRD is configured for normal operation
once the desired IC is installed. The desired IC enters
shutdown by cutting the trace of jumper JU1 and driving
the IC
SHDN
pin low through the side of the jumper that
is still connected to the part.
External Clock
Internal Clock
Shutdown
Maxim Integrated
3
MAXFILTERBRD
Evaluates: MAX7408–MAX7415/
MAX7418–MAX7425
4
Figure 2. MAXFILTERBRD Schematic
NOTE:
INSTALL COMPONENTS FROM SUGGESTED COMPONENTS.
MAX7410 EXAMPLE: INTERNAL OSCILLATOR WITH f
C
APPROXIMATELY 5kHz.
Maxim Integrated
MAXFILTERBRD
Evaluates: MAX7408–MAX7415/
MAX7418–MAX7425
Figure 3. MAXFILTERBRD Component Placement Guide—
Component Side
Figure 5. MAXFILTERBRD PCB Layout—Solder Side
Figure 4. MAXFILTERBRD Component PCB Layout—
Component Side
Figure 6. MAXFILTERBRD Component Placement Guide—
Solder Side
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and
max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
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