MAX1474

Features:

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)


Application

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


Pinout




Specifications

Supply Voltage, VDD to VSS..................................... -0.3V to +6V
All Other Pins ...................................(VSS - 0.3V) to (VDD + 0.3V)
RMS Current into Any Pin.....................................................50mA
Continuous Power Dissipation (TA = +70°C)
6-Pin SC70 (derate 3.1mW/°C above +70°C)................245mW
Operating Temperature Range
MAX1474AXT....................................................-40°C to +125°C
Storage Temperature Range ..........................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) ................................+300°C


Description

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 (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.