at42qt1011 ATMEL Corporation, at42qt1011 Datasheet
at42qt1011
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at42qt1011 Summary of contents
Page 1
... Infinite max on-duration • Applications: – Control panels, consumer appliances, proximity sensor applications, toys, lighting controls, mechanical switch or button, • Patents: ® – QTouch (patented charge-transfer method) ™ – HeartBeat (monitors health of device) One-channel Touch Sensor IC AT42QT1011 9542G–AT42–03/10 ...
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... Pin Listing Name Pin Type OUT 1 O Vss 2 P SNSK 3 I/O SNS 4 I/O Vdd 5 P SYNC 6 I 1.3 Schematic Figure 1-1. AT42QT1011 2 OUT 1 6 SYNC/MODE VSS 2 5 VDD SNSK 3 4 SNS Comments Output state – Supply ground – Sense pin Cs + Key Sense pin Cs Power – ...
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... Overview of the AT42QT1011 2.1 Introduction The AT42QT1011 (QT1011 digital burst mode charge-transfer (QT of detecting near-proximity or touch, making it ideal for implementing touch controls. With the proper electrode and circuit design, the self-contained digital IC will project a touch or proximity field to several centimeters through any dielectric like glass, plastic, stone, ceramic, and even most kinds of wood ...
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... Fast mode is useful when speed of response is the prime design requirement. The delay between bursts in Fast mode is approximately 1 ms, as shown in AT42QT1011 4 2.4.2. Note that, although this affects the responsiveness of the sensor less of an Figure 3-1. 9542G– ...
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... Fast Mode Bursts (SYNC Held High) SNSK ~1ms SYNC Figure 3-2 on page Low Power Mode (SYNC Held Low) ~80 ms Sleep Sleep SNSK SYNC OUT 3-2). Therefore, to guarantee entry into SYNC mode the low period of the SYNC (Figure 3-3 on page AT42QT1011 5. Fast detect integrator Sleep (Figure 3-1 on page 6). 5 ...
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... The QT1011 employs a hysteresis dropout of two counts of the delta between the reference and threshold levels. 3.3 Max On-duration The max on-duration of this device is infinite; that is, the device will not automatically recalibrate due to a persistant detection. AT42QT1011 6 SYNC Mode (Triggered by SYNC Edges) sleep sleep SNSK ...
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... Once an object is sensed, the drift compensation mechanism ceases since the signal is legitimately high, and therefore should not cause the reference level to change. Figure 3-5. 9542G–AT42–03/10 (Figure 3-5) is performed by making the reference level track the raw signal Drift Compensation S ignal Threshold R eference Output AT42QT1011 H ysteresis 7 ...
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... The HeartBeat indicator can be sampled by using a pull-up resistor on the OUT pin and feeding the resulting positive-going pulse into a counter, flip flop, one-shot, or other circuit. The pulses will only be visible when the chip is not detecting a touch. AT42QT1011 8 (Figure 3-6), ...
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... Obtaining HeartBeat Pulses with a Pull-up Resistor HeartBeat™ Pulses Ro 1 Using a Microcontroller to Obtain HeartBeat Pulses in Either Output State PORT_M Microcontroller PORT_M.y AT42QT1011 VDD 5 3 VDD OUT SNSK 4 SNS 6 SYNC VSS ...
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... Rs resistor and the electrode should not run near ground, to reduce loading. For best EMC performance the circuit should be made entirely with SMT components. AT42QT1011 10 for the power supply range current drain averages less than 2) should be placed as close to the body of the chip as possible so that the ® ...
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... ESD event. The bypass capacitor should be placed very close to the Vss and Vdd pins. 4.4 Power On On initial power up, the QT1011 requires approximately 100 ms to power on to allow power supplies to stabilize. During this time the OUT pin state is not valid and should be ignored. 9542G–AT42–03/10 AT42QT1011 11 ...
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... Time between end of burst and start of the next (LP mode) T Burst length BL T Response time R T HeartBeat pulse width HB AT42QT1011 12 -40°C to +85°C -55°C to +125° +6.5V ±20 mA Infinite Infinite -0. 0.6) Volts DD +1.8 to 5.5V ±20 mV ±100 ...
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... Figure 5-1. Figure 5-2. 9542G–AT42–03/10 T – Time Between Bursts (LP Mode – Burst Length BL AT42QT1011 13 ...
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... Low input logic level IL V High input logic level HL V Low output voltage OL V High output voltage OH I Input leakage current IL C Load capacitance range X A Acquisition resolution R AT42QT1011 14 Min Typ Max Units 10 counts 2 counts 4 samples Infinite seconds Min Typ Max Units 1.8 5.5 V 203 ...
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... Die is facing down after trim/form. Package Drawing Contact: packagedrawings@atmel.com 9542G–AT42–03/ Side View c SEATING PLANE View A-A C SEE VIEW B TITLE 6ST1, 6-lead, 2.90 x 1.60 mm Plastic Small Outline Package (SOT23) AT42QT1011 A2 A 0.10 C SEATING PLANE 0.10 C SEATING PLANE A1 C COMMON DIMENSIONS (Unit of Measure = mm) ...
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... Part Marking Note: Pin 1 ID 5.8 Part Number Part Number AT42QT1011-TSHR 5.9 Moisture Sensitivity Level (MSL) AT42QT1011 16 Samples of the AT42QT1011 may also be marked T10E. Abbreviated 1011 Part Number: AT42QT Description 6-pin SOT23 RoHS compliant IC MSL Rating Peak Body Temperature MSL1 1011 Specifications o 260 ...
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... Revision A – May 2009 Revision B – August 2009 Revision C – August 2009 Revision D – January 2010 Revision E – January 2010 Revision F – February 2010 Revision G – March 2010 9542G–AT42–03/10 AT42QT1011 ® Design History Initial release Update for chip revision 2.2.2 ...
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... Atmel Corporation. All rights reserved. Atmel ™ ™ trademarks HeartBeat and others are trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be registered trademarks or trademarks of others. International Atmel Asia Atmel Europe Unit 01-05 & 16, 19/F ...