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QT220 - 2 KEY QTOUCH SENSOR IC

General Description

Sense pin (to Rs1+ Cs1) Sense pin (to Cs1 electrode) Do not connect Speed option Do not connect Output, key 1 Output, key 2 Ground Sync in and/or spread spectrum drive Unbonded internally Unbonded internally Do not connect Reset pin, active low.

Can usually tie to Vdd.

Key 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 Figures 1-1 and 1-2. Low-power Sync mode: In this mode the device operates with about a 100ms response time and very low current (about 90µA average at 4.0V). This mode allows the device to be synchron.

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Datasheet Details

Part number QT220
Manufacturer QUANTUM
File Size 351.90 KB
Description 2 KEY QTOUCH SENSOR IC
Datasheet download datasheet QT220 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.DataSheet4U.com lQ z Two 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 cost per key z 20-SSOP Pb-free package SNS1A SNS1K n.c. SPEED n.c. OUT1 OUT2 VSS SYNC/SS n.c. 1 2 3 4 QT220 5 20-SSOP 6 7 8 9 10 15 14 13 12 11 16 20 19 18 17 QT220 2 KEY QTOUCH™ SENSOR IC SNS2K/OPT1 SNS2A OPT2 n.c. n.c. OSC VDD /RES n.c. n.c.