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Xicor - NV Electronically Programmable Capacitor

Numéro de référence X90100
Description NV Electronically Programmable Capacitor
Fabricant Xicor 
Logo Xicor 





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X90100 fiche technique
Small Packages
MSOP
Flipchip
NV Electronically Programmable Capacitor
X90100
FEATURES
• 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
The Xicor X90100 is a non-volatile electronically pro-
grammable capacitor. The device is programmed
through a simple digital interface. After programming,
the chosen setting for the device is retained by inter-
nal 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 dielec-
tric 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 coeffi-
cient in differential mode (<50ppm/°C).
The X90100 is programmed through three digital inter-
face 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).
BLOCK DIAGRAM
Cm
CPAD
U/D
INC
1*CU
2*CU
4*CU
8*CU
16*CU
Logic and E2
Cp
CPAD
VSS
CS
REV 1.4.7 9/8/03
VCC Power On Reset
www.xicor.com
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