DC991A

DC991A demonstration circuit is optimized for a down-converting mixer tests & measurements for input frequency range of 700MHz to 1680MHz, an output frequency range of 110MHz to 170MHz (12dB return loss BW). The LO port frequency range is 515 to 915MHz (10dB return loss BW). The LT® 5560 is a high performance broadband Up/Down-converting active mixer. This double balanced mixer can be driven by a single-ended LO source and requires –2dBm of LO power. The signal ports can be impedance matched to a broad range of frequencies, which allow the LT®5560 to be used as an up- or down-conversion mixer in a wide variety of applications. The LT® 5560 is characterized with a supply current of 10mA, however, the DC current is adjustable, which allows the performance to be optimized for each application by changing the value of resistor R1. For Icc=10mA the value of R1=3-ohm. Operation at a lower supply current will, however, degrade linearity.

• 2.7V to 5.3V supply voltage, 10mA supply current at VCC = 3V, EN = High, R1=3
• 10µA maximum shutdown current at VCC = 3V, EN = 0.3V
• < 4000MHz signal input frequency range (requires external matching)
• 15dB IF input return loss Z0 = 50 with external matching
• 2.6dB conversion gain (P-INPUT = -20dBm, PLO = -2dBm)
• 10.1dB SSB noise figure (PLO = -2dBm)