DEMO MANUAL DC2322A LTC5576 3GHz to 8GHz High Linearity Active Upconverting Mixer Description Absolute MAMMu rA Demonstration circuit 2322A is designed for evaluation Supply Voltage (V ) ...............................................6.0V CC of the LTC 5576 active upconverting mixer with very Enable Input Voltage (EN) ............... 0.3V to V + 0.3V CC wide input bandwidth and low distortion. Its OUT port IADJ Pin Voltage .......................................0.3V to 2.7V is optimized for 4GHz to 6GHz applications, but is easily LO Port Power (1GHz to 8GHz) .......................... +10dBm retuned for output frequencies as low as 3GHz, or as high IN Port Power (30MHz to 6GHz) ........................ +15dBm as 8GHz with minor performance degradation. The IN port TEMP Input Current ...............................................10mA is optimized for 30MHz to 6GHz operation while the LO Operating Temperature Range (T ) ........40C to 105C C port is always 50 matched from 1GHz to 8GHz. Junction Temperature (T ) .................................... 150C J Storage Temperature Range ..................65C to 150C The LTC5576 is optimized for 5V operation, but can be used with a 3.3V supply with slightly reduced performance. CAUTION: This part is sensitive to electrostatic discharge The enable function allows the part to be easily shut down (ESD). Observe proper ESD precautions when handling for further power savings. the LT5576. Design files for this circuit board are available at DEMO MANUAL DC2322A n t eQM ADn s n High performance signal generators with low harmonic spectrum analyzers are designed to operate at their outputs should be used for 2-tone measurements. Oth- best with about 30dBm to 40dBm at their input. The erwise, low-pass filters at the signal generator outputs spectrum analyzers input attenuation setting should be should be used to suppress harmonics. used to avoid saturating the instrument. n n High quality combiners should be used to present a Set the spectrum analyzers input attenuation depending broadband 50 termination on all ports as well as provide on the spectrum analyzer used. good port-to-port isolation. Adding attenuator pads further n Before performing measurements on the DUT, the improves source isolation and helps prevent the signal system performance should be evaluated to ensure that generators from producing intermodulation products. a clean input signal is obtained and that the spectrum n Spectrum analyzers can produce significant internal analyzers internal distortion is minimized. distortion products if they are overdriven. Generally, Quick Ats Dp 1. Connect all test equipment as shown in Figure 1. 5. Set the LO signal generator to provide a 4900MHz CW signal at about 0dBm to the demo boards LO port. 2. Set the power supply output voltage to 5V, and set the current limit to 150mA. 6. Set the RF signal generators to provide one 899MHz CW signal and one 901MHz CW signal. The signals should be 3. Connect the ground and V turrets to the power sup- CC applied to the 2-way combiner. The output of the combiner ply. BE SURE TO CONNECT THE V TURRET BEFORE CC should be applied to the demoboards IN port. The two THE EN TURRET TO ENSURE THAT THE PART DOES tones should be set to 10dBm each at the mixers IN port. NOT GET DAMAGED. ALSO, REMOVE POWER FROM EN TURRET BEFORE REMOVING POWER FROM THE 7. Set the spectrum analyzers center frequency to 5.8GHz. V TURRET. CC 8. Perform various measurements (Conversion Gain, 4. Connect the EN turret to the power supply. OIP3, LO leakage, etc.) pA l ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 1 2 C1, C2 CAP., 1000pF, C0G, 50V, 5%, 0402 MURATA, GRM1555C1H102JA01 2 0 C3 DNI, 0402 3 1 C4 CAP., 100pF, C0G, 50V, 5%, 0402 MURATA, GRM1555C1H101JA01 4 1 C5 CAP., 0.3pF, C0G, 50V, 0.05pF, 0402 AVX, 04021J0R3ZBS 5 1 C6 CAP., 0.2pF, C0G, 50V, 0.05pF, 0402 AVX, 04021J0R2ZBS 6 1 C7 CAP., 0.01F, X7R, 50V, 10%, 0402 MURATA, GRM155R71H103KA88 7 1 C8 CAP., 1F, X7R,10V,10%, 0603 MURATA, GRM188R71A105KA61 8 4 E1-E4 TEST POINT, TURRET, .064 MTG. HOLE MILL-MAX,2308-2-00-80-00-00-07-0 9 3 J1-J3 CON., SMA, 50, EDGE-LANCH E.F. JOHNSON, 142-0701-851 10 2 L1, L2 RES., 0, 0402 VISHAY, CRCW04020000Z0ED 11 1 R1 RES., 2.61k, 1/16W, 1%, 0402 VISHAY, CRCW04022K61FKED 12 1 T1 TRANS., 50, 4.5MHz 3000MHz, TC1-1-13M+ MINI CIRCUITS, TC1-1-13M+ 13 1 U1 IC., HIGH DYNAMIC RANGE ACTIVE MIXER LINEAR TECH., LTC5576IUF dc2322afa 2 ist rts ure roce rt etup ent uip est on otes