QT240 Datasheet - QUANTUM

QT240 4 KEY QTOUCH SENSOR IC

Sense pin (to Rs2 + Cs2) Sense pin (to Cs2, electrode) Sense pin (to Rs1 + Cs1) Sense pin (to Cs1, electrode); speed option Output, key 1 Output, key 2 Output, key 3 Ground Sync in and/or spread spectrum drive Unbonded internally Unbonded internally Output, key 4 Reset pin, active low. Can usually t.

www.DataSheet4U.com lQ z Four independent charge-transfer (‘QT’) touch keys z Individual outputs per channel - active high z Projects prox fields through any dielectric z Sensitivity easily adjusted on a per-channel basis z 100% autocal for life - no adjustments required z 3.9V ~ 5.5V single supply operation z 10s, 60s, infinite auto-recal timeout (strap options) z Sync pin for line sync to suppress noise z Spread spectrum operation z Pin options for auto recalibration timings z Extremely low c.

QT240 Features

* spread-spectrum acquisition capability, external synchronization of acquire bursts, and fast and slow acquisition modes. These modes are enabled via high-value resistors connected to the SNS pins to ground or Vdd. These resistors are required in every circuit. There are two basic modes as shown in F

QT240_QUANTUM.pdf