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