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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 testing of all the functions, with no additional support circuitry. Signal inputs and outputs use SMA connectors and are compatible with the 50 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 50 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 -40C to +85C -40C to +85C -40C to +85C -40C to +85C 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 10F 20%, 6.3V A-size tantalum capacitor SMA connectors 3-pin header, 0.025" sq., 0.10" centers 33nH inductor 18nH inductor 100 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
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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 "VCC" position. 3) Connect a signal generator to the IFIN connector using an SMA cable. As with any precision RF connector, be careful while threading the connector. For optimal performance, consult the connector manufacturer'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 quality 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 voltages on the PC board with a multimeter. Use Table 1 to verify correct node voltage during proper operation.
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 lowpass filter at the SHDN pin. Capacitors C3, C4, C7, C9, and C10 form the V CC decoupling network. Note the location of each component. Capacitor C10, a 10F tantalum type, is located near the VCC input test point. This serves as the central node for distribution of VCC to the mixer's supply pin and the output pull-up inductor L2. Both of these supply points need separate bypass capacitors as well as separate traces on the PC board. This is prudent practice 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 VCC SHDN NOMINAL DC VOLTAGE (V) (VCC - 0.4) to (VCC - 1.0) 0 +1.37 VCC +2.7 to +5.5 VCC 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 section 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 50 at the frequency of interest.
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MAX2660 Evaluation Kit Evaluates: MAX2660/MAX2661/MAX2663/MAX2671
Table 3. Output Matching Components vs. RF Output Frequency
PART COMPONENT L1 (nH) L2 (nH) C3 (pF) MAX2660 C4 (pF) C5 (pF) C6 (pF) C7 (pF) L1 (nH) L2 (nH) C3 (pF) MAX2661 C4 (pF) C5 (pF) C6 (pF) C7 (pF) L1 (nH) L2 (nH) C3 (pF) MAX2663 C4 (pF) C5 (pF) C6 (pF) C7 (pF) L1 (nH) L2 (nH) C3 (pF) MAX2671 C4 (pF) C5 (pF) C6 (pF) C7 (pF) COMPONENT VALUE AT A GIVEN RF OUTPUT FREQUENCY (MHz) AT 400 Short 39 220 220 3300 6.8 470 Short 39 470 220 3300 6.8 470 Short 39 220 220 3300 6.8 220 Short 39 220 220 3300 6.8 220 AT 900 33 18 47 47 220 1 47 33 18 47 47 220 1 47 33 18 47 47 220 1.8 47 33 18 47 47 220 1 47 AT 1900 8.2 2.7 47 47 220 1.5 47 8.2 2.7 47 47 100 1.5 47 8.2 1.8 47 47 100 1.8 47 8.2 2.7 47 47 100 1.5 47 AT 2450 3.3 2.2 47 47 15 Open 47 3.3 1.8 47 47 220 Open 47 3.3 1.8 47 47 220 Open 47 3.3 1.8 47 47 220 Open 47
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MAX2660/MAX2661/MAX2663/MAX2671 Evaluation Kits Evaluates: MAX2660/MAX2661/MAX2663/MAX2671
VCC C10 CAPAVX 10F 16V C9 220pF
VCC
1
JU1 2 R1 100
3
J1 SMA
C1 220pF 1 LO
U1
SHDN
6 C8 220pF VCC C4 47pF C3 47pF
2 J2 SMA C2 220pF 3
MAX2660
GND IFIN VCC RFOUT
5
4
L1 33nH
C5 220pF
J3 SMA C6
L2 18nH VCC C7 47pF
Figure 1. MAX2660 EV Kit Schematic
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MAX2660 Evaluation Kit Evaluates: MAX2660/MAX2661/MAX2663/MAX2671
1.0"
Figure 2. MAX2660 EV Kit PC Board Layout--Component Side
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MAX2660/MAX2661/MAX2663/MAX2671 Evaluation Kits Evaluates: MAX2660/MAX2661/MAX2663/MAX2671
1.0"
1.0"
Figure 3. MAX2660 EV Kit PC Board Layout--Component Side Metal
Figure 4. MAX2660 EV Kit PC Board Layout--Solder Side Metal
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