SNAS696C March 2017 – April 2019 LMX2594
The OSCin pins are used as a frequency reference input to the device. The input is high impedance and requires AC-coupling caps at the pin. A CMOS clock or XO can drive the single-ended OSCin pins. Differential clock input is also supported, making it easier to interface with high-performance system clock devices such as TI’s LMK series clock devices. As the OSCin signal is used as a clock for the VCO calibration, a proper reference signal must be applied at the OSCin pin at the time of programming FCAL_EN.