Non-Volatile Digital Programmable Capacitor

IXYS Integrated Circuits Division, Inc. (ICD) announced the availability of the NCD2100, non-volatile digital programmable capacitor. The NCD2100 is a dedicated electronic calibrator for capacitance critical circuits, a typical example of which is capacitive offset trimming of a crystal oscillator. Digitally-controlled capacitance trimming information is communicated via a two-wire serial bus, with the calibration value stored in the internal, non-volatile memory.

The NCD2100 has a tuning ratio of 5.7:1, and a capacitance range of 6.6 – 37.55 pF in very small 63 fF steps for shunt configuration. The device will retain the programmed capacitance value stored in its internal non-volatile memory, which becomes the preferred solution for trimming purposes. Restoring this memory to its initial factory default code is also possible, so that future corrections are possible to manage system variations as aging or re-tuning processes. Other features include: very small size, minimum current draw, wide operating voltage range from 2.5V to 5.5V, and MSL 1 rating.

The NCD2100 is available in the 2mm x 2mm DFN package and also in the 2.8mm x 2.9mm TSOT package. Typical applications include post-trim voltage-controlled oscillators (VCXOs), crystal oscillators, tunable RF Stages, RFID tags, industrial wireless control, filter banks and capacitive sensor trimming. The NCD2100M and NCD2100T are available in production quantities. OEM pricing is $0.84 and $0.82 respectively, in quantities of 25KU.