19-1382; Rev 1; 9/99 MAX2660/MAX2661/MAX2663/MAX2671 Evaluation Kits 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. Features ♦ +2.7V to +5.5V Single Supply ♦ Output Matched to 50Ω at 900MHz ♦ Optimal Component Placement ♦ Easy Evaluation of All Product Functions ♦ All Critical Peripheral Components Included Ordering Information Component List DESIGNATION QTY DESCRIPTION COMPONENTS COMMON TO ALL EVALUATION KITS C1, C2, C5, C8, C9 5 220pF ±10% (0603) NP0 ceramic capacitors C3, C4, C7 3 47pF ±10% (0603) NP0 ceramic capacitors C10 1 10µF ±20%, 6.3V A-size tantalum capacitor J1, J2, J3 3 SMA connectors JU1 1 3-pin header, 0.025” sq., 0.10" centers L1 1 33nH inductor L2 1 18nH inductor R1 1 100Ω 5% (0603) resistor MAX2660 EV KIT ADDITIONAL COMPONENTS C6 U1 1 1pF ±0.1pF (0603) NP0 ceramic capacitor 1 MAX2660, SOT23-6, upconverter mixer TEMP. RANGE PIN-PACKAGE MAX2660EVKIT-T PART -40°C to +85°C 6 SOT23-6 MAX2661EVKIT-T -40°C to +85°C 6 SOT23-6 MAX2663EVKIT-T -40°C to +85°C 6 SOT23-6 MAX2671EVKIT-T -40°C to +85°C 6 SOT23-6 Component Suppliers SUPPLIER PHONE FAX AVX 803-946-0690 803-626-3123 Toko 847-297-0700 847-699-7864 _________________________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 1 1pF ±0.1pF (0603) NP0 ceramic capacitor U1 1 MAX2661, SOT23-6, upconverter mixer MAX2663 EV KIT ADDITIONAL COMPONENTS C6 1 1.8pF ±0.1pF (0603) NP0 ceramic capacitor U1 1 MAX2663, SOT23-6, upconverter mixer MAX2671 EV KIT ADDITIONAL COMPONENTS C6 1 1pF ±0.1pF (0603) NP0 ceramic capacitor U1 1 MAX2671, SOT23-6, upconverter mixer Test Equipment Required EQUIPMENT DESCRIPTION DC Power Supply Capable of supplying +2.7V to +5.5V at a minimum of 50mA HP 8561E Spectrum Analyzer Or equivalent high-sensitivity spectrum analyzer Digital multimeters To monitor supply voltage and supply current (if desired) HP 8648C RF Generators, 2 For the IFIN and LO inputs or equivalent sine-wave sources ________________________________________________________________ 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. Evaluates: MAX2660/MAX2661/MAX2663/MAX2671 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 50Ω impedance of test equipment. Evaluates: MAX2660/MAX2661/MAX2663/MAX2671 MAX2660/MAX2661/MAX2663/MAX2671 Evaluation Kits 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. PIN NAME NOMINAL DC VOLTAGE (V) 1 LO 2 GND 0 3 IFIN +1.37 4 RF OUT 5 VCC 6 SHDN (VCC - 0.4) to (VCC - 1.0) CONVERSION GAIN (dB) AT 900MHz MAX2660 +7.0 MAX2661 +10.7 MAX2663 +3.4 MAX2671 +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 10µF 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. 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 VCC +2.7 to +5.5 VCC for normal operation 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. 2 PART Modifying the EV Kit Table 1. Nominal DC Voltages PIN NUMBER Table 2. Typical Conversion Gain 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. 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. _______________________________________________________________________________________ MAX2660 Evaluation Kit Evaluates: MAX2660/MAX2661/MAX2663/MAX2671 Table 3. Output Matching Components vs. RF Output Frequency PART MAX2660 MAX2661 MAX2663 MAX2671 COMPONENT COMPONENT VALUE AT A GIVEN RF OUTPUT FREQUENCY (MHz) AT 400 AT 900 AT 1900 AT 2450 L1 (nH) Short 33 8.2 3.3 L2 (nH) 39 18 2.7 2.2 C3 (pF) 220 47 47 47 47 C4 (pF) 220 47 47 C5 (pF) 3300 220 220 15 C6 (pF) 6.8 1 1.5 Open C7 (pF) 470 47 47 47 L1 (nH) Short 33 8.2 3.3 L2 (nH) 39 18 2.7 1.8 C3 (pF) 470 47 47 47 C4 (pF) 220 47 47 47 C5 (pF) 3300 220 100 220 C6 (pF) 6.8 1 1.5 Open C7 (pF) 470 47 47 47 L1 (nH) Short 33 8.2 3.3 L2 (nH) 39 18 1.8 1.8 C3 (pF) 220 47 47 47 C4 (pF) 220 47 47 47 C5 (pF) 3300 220 100 220 C6 (pF) 6.8 1.8 1.8 Open C7 (pF) 220 47 47 47 L1 (nH) Short 33 8.2 3.3 L2 (nH) 39 18 2.7 1.8 C3 (pF) 220 47 47 47 C4 (pF) 220 47 47 47 C5 (pF) 3300 220 100 220 C6 (pF) 6.8 1 1.5 Open C7 (pF) 220 47 47 47 _______________________________________________________________________________________ 3 Evaluates: MAX2660/MAX2661/MAX2663/MAX2671 MAX2660/MAX2661/MAX2663/MAX2671 Evaluation Kits VCC C10 CAPAVX 10µF 16V C9 220pF 1 VCC J1 R1 100 1 2 J2 3 SMA C2 220pF 3 2 C1 220pF SMA JU1 LO U1 SHDN MAX2660 GND IFIN VCC RFOUT 6 C8 220pF 5 4 VCC C4 47pF C3 47pF L1 33nH C5 220pF J3 SMA C6 L2 18nH VCC C7 47pF Figure 1. MAX2660 EV Kit Schematic 4 _______________________________________________________________________________________ MAX2660 Evaluation Kit Evaluates: MAX2660/MAX2661/MAX2663/MAX2671 1.0" Figure 2. MAX2660 EV Kit PC Board Layout—Component Side _______________________________________________________________________________________ 5 Evaluates: MAX2660/MAX2661/MAX2663/MAX2671 MAX2660/MAX2661/MAX2663/MAX2671 Evaluation Kits 1.0" Figure 3. MAX2660 EV Kit PC Board Layout—Component Side Metal 6 1.0" Figure 4. MAX2660 EV Kit PC Board Layout—Solder Side Metal _______________________________________________________________________________________