Miniature Electronically Trimmable Capacitor

The MAX1474 is a fine-line (geometry) electronically trimmable capacitor (FLECAP) programmable through a simple digital interface. There are 32 programmable capacitance values ranging from 6.4pF to 13.3pF in 0.22pF increments (see Table 1). The quartz dielectric capacitance is highly stable and exhibits a very low voltage coefficient. It has virtually no dielectric absorption and has a very low temperature drift coefficient (<33ppm/°C). The MAX1474 is programmed through two digital interface pins, which have Schmidt triggers and pulldown resistors to secure capacitance programming.

Applications

* Accelerometer Measurements * Automotive Sensors * Cell Phones * Force Sensors * Humidity Sensors * Industrial Sensor Transmitters/Transducers * Industrial Sensor Transmitters/Transducers * Mobile Radios * Piezoresistive Transducers * Temperature Sensing and Monitoring

* Tiny SC70 Package (1.1mm x 2.2mm x 2.4mm)

* High-Performance Electronically Trimmable Capacitance

* Very Simple Digital Interface

* Eliminates the Need for Mechanical Tuning

* Enabling Technology for Low-Cost Production Line Automation

* Fully Static Operation After Programming (No Switching)