DEMO MANUAL DC1885A LTC5544 4GHz to 6GHz High Dynamic Range Downconverting Mixer DESCRIPTION Demonstration circuit 1885A is a 4GHz to 6GHz high dy- High Dynamic Range Downconverting Mixer Family namic range downconverting mixer featuring the LTC 5544. DEMO IC PART RF RANGE LO RANGE NUMBER NUMBER The LTC5544 is part of a family of high dynamic range, high DC1431A-A LTC5540 600MHz to 1.3GHz 700MHz to 1.2GHz gain passive downconverting mixers covering the 600MHz DC1431A-B LTC5541 1.3GHz to 2.3GHz 1.4GHz to 2.0GHz to 6GHz frequency range. The demo circuit 1885A and DC1431A-C LTC5542 1.6GHz to 2.7GHz 1.7GHz to 2.5GHz the LTC5544 are optimized for 4GHz to 6GHz RF applica- tions. The LO frequency must fall within the 4.2GHz to DC1431A-D LTC5543 2.3GHz to 4GHz 2.4GHz to 3.6GHz 5.8GHz range for optimum performance. DC1885A LTC5544 4GHz to 6GHz 4.2GHz to 5.8GHz The LTC5544 is designed for 3.3V operation, however the Design files for this circuit board are available at IF amplifier can be powered with 5V for the highest P1dB. DEMO MANUAL DC1885A TPERFORMANCE SUMMARY = 25C, VCC = VCC IF = 3.3V, SHDN = Low, P = 2dBm, P = 3dBm (f = C LO RF 2MHz, 3dBm/tone for two-tone tests), unless otherwise noted. (Note 1) PARAMETER CONDITIONS VALUE UNITS Low Side LO Downmixer Application: RF = 4.2GHz to 6GHz, IF = 240MHz, f = f f LO RF IF Conversion Gain RF = 4900MHz 7.9 dB RF = 5250MHz 7.4 dB RF = 5800MHz 6.4 dB 2-Tone Input 3rd Order Intercept RF = 4900MHz 25.4 dBm RF = 5250MHz 25.9 dBm RF = 5800MHz 25.8 dBm 2-Tone Input 2nd Order Intercept f = 5371MHz, f = 5130MHz, f = 5010MHz, 43.2 dBm RF1 RF2 LO f = f f IM2 RF1 RF2 SSB Noise Figure RF = 4900MHz 10.3 dB RF = 5250MHz 11.3 dB RF = 5800MHz 12.8 dB SSB Noise Figure Under Blocking f = 5250MHz, f = 5010MHz, f = 4910MHz, 16.9 dB RF LO BLOCK P = 5dBm BLOCK 2RF 2LO Output Spurious Product (f = f + f /2) f = 5130MHz at 10dBm, f = 5010MHz 58.3 dBc RF LO IF RF LO 3RF 3LO Output Spurious Product (f = f + f /3) f = 5090MHz at 10dBm, f = 5010MHz 77 dBc RF LO IF RF LO Input 1dB Compression RF = 5250MHz, VCC IF = 3.3V 11.4 dBm RF = 5250MHz, VCC IF = 5V 14.6 dBm High Side LO Downmixer Application: RF = 4GHz to 5.8GHz, IF = 240MHz, f = f + f LO RF IF Conversion Gain RF = 4500MHz 8.0 dB RF = 4900MHz 7.7 dB RF = 5250MHz 7.3 dB 2-Tone Input 3rd Order Intercept RF = 4500MHz 24.2 dBm RF = 4900MHz 25.1 dBm RF = 5250MHz 24.0 dBm 2-Tone Input 2nd Order Intercept f = 4779MHz, f = 5020MHz, f = 5140MHz, 39.8 dBm RF1 RF2 LO f = f f IM2 RF2 RF1 SSB Noise Figure RF = 4500MHz 10.7 dB RF = 4900MHz 11.0 dB RF = 5250MHz 11.7 dB 2LO 2RF Output Spurious Product (f = f f /2) f = 5020MHz at 10dBm, f = 5140MHz 55 dBc RF LO IF RF LO 3LO 3RF Output Spurious Product (f = f f /3) f = 5060MHz at 10dBm, f = 5140MHz 75 dBc RF LO IF RF LO Input 1dB Compression RF = 4900MHz, VCC IF = 3.3V 11.3 dBm RF = 4900MHz, VCC IF = 5V 14.5 dBm Note 1: Subject to change without notice. Refer to the latest LTC5544 data sheet for most-up-to-date specifications. dc1885af 2