The LT5512 from Analog Devices is a RF Mixer with RF Frequency 0.1 to 3000 MHz, Conversion Gain 1 dB, Noise Figure 14 dB, IP3 17 dBm, Supply Voltage 4.5 to 5.25 V. Tags: Surface Mount, Down-Conversion Mixer. More details for LT5512 can be seen below.