DEMO MANUAL DC1984A LTC5510 1MHz to 6GHz Wideband High Linearity Active Mixer Description Demonstration circuit 1984A showcases the LTC 5510. The LTC5510 is a high linearity active mixer optimized wideband high linearity active mixer for VHF/UHF upmixer for applications requiring very wide input bandwidth, applications, where a 70MHz input signal is upconverted low distortion and low LO leakage. The IC includes a to the 100MHz to 1GHz output range. Its input port is double-balanced active mixer with an input buffer and a optimized for 30MHz to 2.6GHz, and its output port is high speed LO amplifier. The mixer can be used for both optimized for 10MHz to 1.3GHz. The LO input can be up- and down-conversion and requires only 0dBm of LO either high side or low side. power to achieve excellent distortion and noise perfor- mance. The LTC5510 is optimized for 5V, but can also Another demonstration circuit, the DC1983A, utilizing a be used with a 3.3V supply with reduced performance. multilayer chip hybrid balun, is designed for evaluating The shutdown function allows the part to be disabled for the LTC5510 for wideband up/downmixer applications further power saving. with 30MHz to 3GHz input and 1.2GHz to 2.1GHz output. Design files for this circuit board are available at DEMO BOARD INPUT RANGE LO RANGE OUTPUT RANGE DEMO MANUAL DC1984A erformance ps Specifications are at T = 25C, V = 5V, EN = High, P = 0dBm, C CC LO P = 10dBm (10dBm/tone for two-tone tests), unless otherwise noted. (Note 1) IN PARAMETER CONDITIONS VALUE UNITS 5V VHF/UHF Upmixer Application: f = 70MHz, f = 100MHz to 1000MHz, f = f + f IN OUT LO IN OUT Conversion Gain f = 456MHz 1.1 dB OUT Two-Tone Output 3rd Order Intercept (f = 2MHz) f = 456MHz 29.0 dBm OUT SSB Noise Figure f = 456MHz 11.3 dB OUT SSB Noise Floor at P = 5dBm f = 44MHz, f = 532MHz, f = 462MHz 152 dBm/Hz IN IN LO OUT LO-IN Leakage f = 100MHz to 1500MHz < 62 dBm LO LO-OUT Leakage f = 100MHz to 1500MHz < 39 dBm LO IN-OUT Isolation f = 50MHz to 400MHz > 43 dB IN IN-LO Isolation f = 50MHz to 400MHz > 70 dB IN Input 1dB Compression f = 456MHz 11.0 dBm OUT Note 1: Subject to change without notice. Refer to the latest LTC5510 data sheet for the most up-to-date specifications. a m r NOTE. Stresses beyond Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Supply Voltage (V ) ...............................................6.0V CC Enable Voltage (EN) ........................ 0.3V to V + 0.3V CC LO Input Power (1MHz to 6GHz) ........................ +10dBm IN Input Power (1MHz to 6GHz) ......................... +18dBm Temp Monitor Input Current (TEMP) ......................10mA Operating Temperature Range (T ) ........ 40C to 105C C DetaileD Description Supply Voltage Ramping Supply Voltage Fast ramping of the supply voltage can cause a current The LTC5510 automatically detects the supply voltage and glitch in the internal ESD protection circuits. Depending on configures internal components for 5V or 3.3V operation. the supply inductance, this could result in a supply volt- The auto-detect circuit switches at approximately 4.1V. age transient that exceeds the maximum rating. A supply To avoid undesired operation, the mixer should only be voltage ramp time of greater than 1ms is recommended. operated in the 4.5V to 5.3V or 3.1V to 3.6V supply range. Do not clip powered test leads directly onto the demon- For best overall temperature performance, the external stration circuits V and EN turrets. Instead, make all bias adjustment resistor, R1, should be left open for 5V CC necessary connections with power supplies turned off, supply and set to 2k for 3.3V supply. By default, dem- then increase to operating voltage. onstration circuit 1984A is configured for 5V supply, and R1 is not installed. dc1984af 2 atings aximum bsolute ummary