X90100
Overview
- Non-volatile EEPROM storage of programmed trim codes
- Power On Recall of capacitance setting
- High-Performance Electronically Trimmable Capacitance
- Excellent Linearity: <0.5 LSB error
- Very Simple Digital Interface
- Fast Adjustments: 5µs max incremental change
- Eliminates the need for mechanical tuning
- Capacitance trimmable from 7.5 pF to 14.5 pF (single-ended mode)
- Packages: -MSOP (1.1mm x 3.0mm x 3.0mm) -FCP (1.35mm x 1.32mm x 0.50mm) APPLICATIONS * * * * * * *
- Post-trim of low-cost regenerative receivers Tunable RF stages Low-cost, Low temperature drift oscillators Garage door openers Keyless entry Industrial wireless control Capacitive sensor trimming RFID tags DESCRIPTION X90100 The Xicor X90100 is a non-volatile electronically programmable capacitor. The device is programmed through a simple digital interface. After programming, the chosen setting for the device is retained by internal EEPROM storage whether or not DC power is maintained. There are 32 programmable capacitance values selectable, ranging from 7.5 pF to 14.5 pF in 0.23 pF increments, in single-ended mode. The dielectric is highly stable, and the capacitance exhibits a very low voltage coefficient. It has virtually no dielectric absorbtion and has a very low temperature drift coefficient in differential mode (<50ppm/°C). The X90100 is programmed through three digital interface pins, which have Schmitt triggers and pullup resistors to secure code retention. The three pins, INC, U/D, and CS, are identical in operation to other Xicor chips with up/down interface, such as the x9315 5-bit Digitally Controlled Potentiometer (DCP).
