NCD2400M

INTEGRATED CIRCUITS DIVISION Features DC to 150MHz frequency range 512-state digital programmable capacitor Series or shunt configuration Cshunt = 12.5pF to 194pF (15.5:1 tuning ratio) in discrete 355fF steps Cseries = 1.7pF to 194pF in discrete 376fF steps 2-wire (I2C Fast-mode compatible) serial interface EEPROM non-volatile memory Wide power supply range (2.5V to 5.5V) Operation ambient temperature to 105ºC 2 x 2 x 0.65 mm 6-pin DFN package Applications OCXOs Oscillators Tunable RF stages Filter tuning Capacitive sensor trimming Measurement equipment NCD2400M Wide Capacitance Range, Non-volatile Digital Programmable Capacitor Description The NCD2400M is a dedicated electronic calibrator for oscillators, with reliable performance at 105ºC as required by OCXO applications. This product can be used in series or shunt configuration to support a wide variety of tuning circuit topologies. Digitally controlled capacitance trimming information is communicated via a 2-wire, I2C Fast-mode compatible interface. The preferred power-up default capacitance value can be stored in the internal, re-programmable, non-volatile memory. Ordering Information Part # Description NCD2400MTR NCD2400M1TR Standard product, Chip ID = 0x60, DFN-6 in Tape & Reel (3000/Reel) Special order, Contact Factory for details, Chip ID = 0x61, DFN-6 in Tape & Reel (3000/Reel) Figure 1. NCD2400M Block Diagram V+ VDD V+ NCD2400M SDA SCL DIGITAL INTERFACE V+ AND MEMORY CP C0 ...