19-1382; Rev 1; 9/99
MAX2660/MAX2661/MAX2663/MAX2671
Evaluation Kits
General Description
The MAX2660/MAX2661/MAX2663/MAX2671 evaluation
kits simplify evaluation of the MAX2660/MAX2661/
MAX2663/MAX2671 upconverter mixers. They enable test-
ing of all the functions, with no additional support circuitry.
Signal inputs and outputs use SMA connectors and are
compatible with the 50Ω impedance of test equipment.
Each EV kit is shipped with a Maxim device configured
for operation with an IF input frequency of 40MHz to
500MHz, and LO input frequency of 600MHz to
2400MHz. The output matching network of each kit is
optimized for an RF output frequency of 900MHz.
o
+2.7V to +5.5V Single Supply
o
Output Matched to 50Ω at 900MHz
o
Optimal Component Placement
o
Easy Evaluation of All Product Functions
o
All Critical Peripheral Components Included
Features
Evaluates: MAX2660/MAX2661/MAX2663/MAX2671
Ordering Information
PART
MAX2660EVKIT-T
MAX2661EVKIT-T
MAX2663EVKIT-T
MAX2671EVKIT-T
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
Component List
DESIGNATION QTY
C1, C2, C5,
C8, C9
C3, C4, C7
C10
J1, J2, J3
JU1
L1
L2
R1
DESCRIPTION
220pF ±10% (0603) NP0 ceramic
capacitors
47pF ±10% (0603) NP0 ceramic
capacitors
10µF ±20%, 6.3V A-size tantalum
capacitor
SMA connectors
3-pin header, 0.025” sq., 0.10" centers
33nH inductor
18nH inductor
100Ω 5% (0603) resistor
1pF ±0.1pF (0603) NP0 ceramic
capacitor
MAX2660, SOT23-6, upconverter
mixer
1pF ±0.1pF (0603) NP0 ceramic
capacitor
MAX2661, SOT23-6, upconverter
mixer
1.8pF ±0.1pF (0603) NP0 ceramic
capacitor
MAX2663, SOT23-6, upconverter
mixer
1pF ±0.1pF (0603) NP0 ceramic
capacitor
MAX2671, SOT23-6, upconverter
mixer
COMPONENTS COMMON TO ALL EVALUATION KITS
5
3
1
3
1
1
1
1
Component Suppliers
SUPPLIER
AVX
Toko
PHONE
803-946-0690
847-297-0700
FAX
803-626-3123
847-699-7864
MAX2660 EV KIT ADDITIONAL COMPONENTS
C6
U1
1
1
_________________________Quick Start
Each EV kit is fully assembled and factory tested.
Follow the instructions in the
Connections and Setup
section.
MAX2661 EV KIT ADDITIONAL COMPONENTS
C6
U1
1
1
EQUIPMENT
DC Power Supply
HP 8561E Spectrum
Analyzer
Digital multimeters
Test Equipment Required
DESCRIPTION
Capable of supplying +2.7V to
+5.5V at a minimum of 50mA
Or equivalent high-sensitivity
spectrum analyzer
To monitor supply voltage and
supply current (if desired)
For the IFIN and LO inputs or
equivalent sine-wave sources
MAX2663 EV KIT ADDITIONAL COMPONENTS
C6
U1
1
1
MAX2671 EV KIT ADDITIONAL COMPONENTS
C6
U1
1
1
HP 8648C RF Generators,
2
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX2660/MAX2661/MAX2663/MAX2671
Evaluation Kits
Evaluates: MAX2660/MAX2661/MAX2663/MAX2671
Connections and Setup
1) Verify the DC power supply is set to less than +5.5V
before attaching the supply to the EV kit. A good
starting voltage is +3.0V.
2) Verify the
SHDN
jumper is in the “V
CC
” position.
3) Connect a signal generator to the IFIN connector
using an SMA cable. As with any precision RF con-
nector, be careful while threading the connector. For
optimal performance, consult the connector manu-
facturer’s specifications for torque recommendation.
Set the generator’s output to 70MHz at -30dBm
power level.
4) Connect a second signal generator to the LO input
connector using an SMA cable. Set the generator’s
output to 970MHz at -5dBm power level (use
-10dBm for the MAX2671 EV Kit).
5) Connect the RF output of the EV kit to the spectrum
analyzer using an SMA cable. Take care to use qual-
ity connector adapters for the spectrum analyzer’s
input. Avoid using BNC-type connectors due to their
high VSWR while operating in the gigahertz range.
6) To assist in troubleshooting, verify the correct volt-
ages on the PC board with a multimeter. Use Table 1
to verify correct node voltage during proper opera-
tion.
Table 2. Typical Conversion Gain
PART
MAX2660
MAX2661
MAX2663
MAX2671
CONVERSION GAIN (dB) AT 900MHz
+7.0
+10.7
+3.4
+11.2
Detailed Description
Figure 1 is the schematic for the EV kit as shipped. The
output matching components, L1, L2, C5, and C6, are
optimized for an output frequency of 900MHz.
Capacitors C1 and C2 are DC blocking capacitors for
the IFIN and LO input ports. To reduce the possibility of
noise pickup, resistor R1 and capacitor C8 form a low-
pass filter at the
SHDN
pin.
Capacitors C3, C4, C7, C9, and C10 form the V
CC
decoupling network. Note the location of each compo-
nent. Capacitor C10, a 10µF tantalum type, is located
near the V
CC
input test point. This serves as the central
node for distribution of V
CC
to the mixer’s supply pin
and the output pull-up inductor L2. Both of these sup-
ply points need separate bypass capacitors as well as
separate traces on the PC board. This is prudent prac-
tice to curtail crosstalk in high-frequency systems.
Table 1. Nominal DC Voltages
PIN NUMBER
1
2
3
4
5
6
PIN NAME
LO
GND
IFIN
RF OUT
V
CC
SHDN
NOMINAL DC VOLTAGE (V)
(V
CC
- 0.4) to (V
CC
- 1.0)
0
+1.37
V
CC
+2.7 to +5.5
V
CC
for normal operation
Modifying the EV Kit
The EV kit is easily configured for use with any of the
MAX2660/MAX2661/MAX2663/MAX2671 devices. Each
of these devices offers different performance levels for
system optimization.
Changing to Different Devices
To configure the EV kit for a different device, use
appropriate surface-mount rework equipment to
remove the existing IC from the PCB. Take care to
ensure that the package temperature does not exceed
the limits listed in the
Absolute Maximum Ratings
sec-
tion of the MAX2660/MAX2661/MAX2663/MAX2671/
MAX2673 data sheet. Install the new device using
appropriate surface-mount equipment and techniques.
See Table 3 for the correct component values for the
desired operating frequency and device type.
Analysis
1) Set the spectrum analyzer’s center frequency to
900MHz, with a span of 30MHz.
2) Set the marker position to the peak level.
3) Read the output power of the center frequency. This
should be -28dBm to -21dBm, depending on which
device is used. The output frequency is equal to the
algebraic difference of the LO and IF frequencies.
The power is equal to the IFIN input power plus the
conversion gain of the upconverter mixer. See Table
2 for the typical conversion gain of each device.
Operation at Other Frequencies
Changing the EV kit to operate at frequencies other
than listed in Table 3 involves matching each device’s
output impedance to 50Ω at the frequency of interest.
2
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