NCD2000 - Non-volatile programmable capacitor
(preliminary)               
Data Sheets
                           NCD 2000 
Application Notes Evaluation Boards  Price, Packing and Availability
Product Description

The INCIDE NCD2000 is an electronically programmable capacitor. The device is programmed through a simple digital interface, taking current from a 6.5V external voltage supply with a current compliance of 100mA. After programming, the chosen setting for the device is retained whether or not DC power is maintained. There total single ended capacitance can be calculated as C=6.6pF+X*6.6pF+Y*1.4pF+Z*63fF, where X has 2bit, Y has 3bit and Z has 5bit. Capacitance exhibits a voltage dependence from -900 to -5100ppm/V, depending on the capacitance value selected. Temperature dependence ranges from 7 to 350ppm/ºC, depending on the absolute capacitance value. The NCD2000 is programmed through two digital interface pins (DA, CLK), which have Schmitt triggers and pulldown resistors to minimize programming errors. Pin PV is connected to a 6.5V supply (100mA current compliance) when programmed. The 3 pins can be left unconnected during normal operation once the device is programmed.
 Specifications
Supply voltage (VDD) -0.3   /  6V
Input voltage < VDD+0.3
Power Dissipation < 100mW
Supply current  7uA (typ.)
Operation freqeuncy  < 200MHz
Capacitance Resolution 0.063pF
 Programming resolution 11 bits  
 Die dimension  0.72 sq-mm
Package 6-Lead QFN, 6-Lead TSOT, bumped wafer
 
 Functional Block Diagram
 Features
  • NCD2000 is a capacitive digital to analogue converter integrated circuit well suited to make initial offset trimming of the crystal oscillator. The trimming is done by a serial bus and the calibration information is stored in an internal PROM.
  • Very small size
  •  Minimum current draw
  •  Wide operating temperature range
  • MSL 1
 

Price, Packaging, and Availability
NCD2000  Model Options
Model Status Package Pins Temp
Range		 Available RoHS Compliant Samples Purchase
NCD2000A Ramp-up 6 ld QFN 6 Comm now
Contact NCD Contact NCD
NCD2000B Ramp-up 6 ld TSOT 6 Comm now Contact NCD Contact NCD
NCD2000C Ramp-up bumped wafer 6 Comm now   Contact NCD Contact NCD
sales at INCIDE
2008 (C) INCIDE, S.A.  - All Rights Reserved