QT160-DG Atmel, QT160-DG Datasheet
QT160-DG
Specifications of QT160-DG
Related parts for QT160-DG
QT160-DG Summary of contents
Page 1
... The option-selectable toggle mode permits on/off touch control, for example for light switch replacement. The devices require only a common inexpensive capacitor per channel in order to function. The QT160 also offers the unique adjacent key suppression (AKS™, patent pending) feature which suppresses touch from weaker responding keys and allows only a dominant key to detect, for example to solve the problem of large fingers on tightly spaced keys ...
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... OVERVIEW QT160/161 is a 6-channel burst mode digital charge-transfer (QT) sensor designed specifically for touch controls; they include all hardware and signal processing functions necessary to provide stable sensing under a wide variety of conditions. Only a single low cost, non-critical capacitor per channel is required for operation. ...
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... Experimentation is required. Since the channels acquire their signals in time-sequence, any of the 6 electrodes can be placed in direct proximity to each other if desired without cross-interference. A good example of backlighting can be found in the E160 eval board for the QT160. 1.3.3 K ’ IRCHOFF ...
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... Figure 1-6 Shielding Against Fringe Fields Sense wire 1.3.6.2 Decreasing Sensitivity In some cases the QT160 may be too sensitive. In this case gain can be lowered further by a number of strategies: a) making the electrode smaller, b) making the electrode into a sparse mesh using a high space-to-conductor ratio (Figure 1-3 decreasing the Cs capacitors ...
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... If no detection is sensed prior to the final count, the H ysteresis counter is reset immediately to zero. In the QT160/161, the required count is 3. The Detection Integrator can also be viewed as a 'consensus' filter, that requires three detections in three successive bursts to create an output. ...
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... If the power supply is shared with another electronic system, care should be taken to assure that the supply is free of digital spikes, sags, and surges which can adversely affect the IC. The QT160/161 will track slow changes in Vdd, but it can be seriously affected by rapid voltage steps. The supply is best locally regulated using a conventional 78L05 type regulator, or almost any 3-terminal LDO device from ...
Page 7
... Keep the 6 Cs sampling capacitors and all series-R components close to the IC. 7. Use a 0.1µF minimum ceramic bypass cap very close to the QT160/161 supply pins. 8. Use series-R’s in the sense lines large a value as the circuit can tolerate. 9. Bypass input power to chassis ground and again at circuit ground to reduce line-injected noise effects ...
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... DD Operating temperature range, 4.5V - 5.5V (QT160-AS, QT161-AS -40 - +105C Operating temperature range, 3.0V - 4.5V (QT160-AS, QT161-AS -40 - +85C Operating temperature range (QT160-D, QT161-D) ...
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... Figure 4-3 9 Max Units 6 counts 2 counts 3 samples ms/level ms/level secs Option pin selected Burst Duration v s. Cs, Cx 4000 3500 3000 2500 2000 1500 1000 500 Figure 4 5pF Cx = 10pF Cx = 15pF Cx = 22pF Cx = 33pF Cx = 47pF 200 250 QT160/161 1.07/0904 Notes Cs = 47nF Cs = 39nF Cs = 22nF Cs = 10nF 50 ...
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... W e ø E Base level Inches Min Max 0.396 0.407 0.301 0.311 0.205 0.212 0.026 0.026 0.010 0.015 0.022 0.037 0.005 0.009 0º 8º 0.068 0.078 0.002 0.008 QT160/161 1.07/0904 Notes BSC 4 places Typical BSC Typical Notes ...
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... PIN LISTINGS Table 7-1 Pin Descriptions - QT160-D Pin Name 1 Vdd 2 Vdd 3 Vss Negative power (Ground) 4 Vss Negative power (Ground) 5 Vss Negative power (Ground) 6 SNS1A Channel 1 pin A to key 7 SNS1B 8 SNS2A Channel 2 pin A to key 9 SNS2B 10 SNS3A Channel 3 pin A to key 11 SNS3B ...
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Tel: +44 (0)23 8056 5600 Fax: +44 (0)23 8045 3939 The specifications set out in this document are subject to change without notice. All products sold and services supplied by QRG are subject to our Terms and Conditions of ...