qt1103 Quantum Research Group, qt1103 Datasheet
qt1103
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qt1103 Summary of contents
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... This datasheet is applicable to all revision 3 chips The QT1103 is designed for low cost appliance, mobile, and consumer electronics applications. QTouch™ technology is a type of patented charge-transfer sensing method well known for its robust, stable, EMC-resistant characteristics the only all-digital capacitive sensing technology in the market today ...
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... LP Mode Typical Response Times . . . . . . . . . . . . . . . . . . . . . . 4.8 Mechanical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.9 Part Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.10 Moisture Sensitivity Level (MSL 5.1 Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2 Numbering Convention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . QT1103_3R0.03_0607 ...
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... DI mechanism to dramatically reduce the probability of false detection due to noise. 1.2.8 Sync Mode The QT1103 features a Sync mode to allow the device to slave to an external signal source, such as a mains signal (50/60Hz), to limit interference effects. This is performed using the SYNC/LP pin. Sync mode operates by triggering three sequential acquire bursts, in sequence C-A-B from the Sync signal ...
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... The QT1103 has a serial output using one or two wires, RS-232 data format, and automatic baud rate detection. A simple protocol is employed. The QT1103 operates in slave mode, i.e. it only sends data to the host after receiving a request from the host. An additional /CHANGE (state changed) signal allows the use of the serial interface to be optimised, rather than being polled continuously ...
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... Open Open or option resistor* Open Open Open Open or option resistor* Open Open or option resistor* Open or † mode resistor † Open or mode resistor resistor* Open 0V Vdd or Vss** Open Open Open Open Open - Open 100k resistor to Vss Vdd QT1103_3R0.03_0607 - - - - † † or option - - ...
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... SS 100K Vdd 32 RX 100K Vdd 31 1W 100K Vdd 30 /CHANGE 29 N.C. 5 N.C. FAST-DETECT Off Enabled Off Off QT1103_3R0.03_0607 KEY KEY KEY Recommended Rb1, Rb2 Value With Spread-Spectrum Vdd Range Rb1 Rb2 2.8 ~ 2.99V 12K 27K 3.0 ~ 3.59V 12K 22K 3 15K 27K ...
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... Rb2 Css 1 SS 100K Vdd 32 RX 100K Vdd 31 1W 100K Vdd 30 /CHANGE 29 N.C. 5 N.C. FAST-DETECT Enabled Off QT1103_3R0.03_0607 KEY 2 KEY 1 KEY 0 With Spread-Spectrum Vdd Range Rb1 Rb2 12K 27K 12K 22K 3 15K 27K No Spread-Spectrum Vdd Range Rb1 Rb2 2.8 ~ 2.99V 15K dni 3.0 ~ 3.59V ...
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... Operation in low power mode is governed by the state of the LP input and whether at least one key has a confirmed touch. If the LP input constant low level, then the QT1103 will remain in full speed operation (14ms or 28ms typical response time and normal power consumption Figure 2 ...
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... If the LP input constant high level, then the QT1103 will enter low power operation whenever it is not detecting a touch. It will switch automatically to full speed operation while there is a touch, and revert to low power operation at the end of the touch. This is shown in Figure 2.3. ...
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... Auto baud rate detection takes place by having the host device send a specific character to the QT1103, which allows the QT1103 to set its baud rate to match that of the host. One feature of this method is that the baud rate can be any rate between 8,000 and 38,400 bits per second. Neither the QT1103 nor the host device has to be accurate in their transmission rates, i ...
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... The use of low power (LP) mode presents some additional 1W timing requirements mode (Section 2.5), the QT1103 will only respond to a request from the host when it is making one of its infrequent checks for a key press. Hence, in that condition most requests from the host to the QT1103 will be ignored, since the QT1103 will be sleeping and unresponsive ...
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... Spread-spectrum Circuit The QT1103 offers the ability to spectrally spread its frequency of operation to heavily reduce susceptibility to external noise sources and to limit RF emissions. The SS pin is used to modulate an external passive RC network that modulates the OSC pin ...
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... LP setting ms End of touch ms End of touch µs baud Units Notes 3.3V; 190ms LP mode DD µ 2.8V; 190ms LP mode 3.3V DD µ 2. 3.3V DD µ 2. 3.3V DD µ 2. 7mA sink V 2.5mA source µA bits QT1103_3R0.03_0607 +85 C ...
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... Threshold for decrease of Cx load 2 secs Time to recalibrate if Cx load has exceeded anti-detection threshold 6 samples Must be consecutive or detection fails 3 samples Must be consecutive or detection fails 10, 60, inf secs Option pin selected 2,000 ms/level Towards increasing Cx load 500 ms/level Towards decreasing Cx load 14 QT1103_3R0.03_0607 ...
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... QT1103, average Idd (full speed operation) 5.0 4.0 3.0 2.0 1.0 0 burst length (ms) Full speed operation Low Power operation (optimized - only burst B in use) QT1103, average Idd (70ms optimized LP operation) 1500.0 1250.0 1000.0 750.0 500.0 250.0 0 burst length (ms) QT1103, average Idd (190ms optimized LP operation) 500 ...
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... Low Power operation (optimized - only burst A and B in use) QT1103, average Idd (70ms optimized LP operation) 1500.0 1250.0 1000.0 750.0 500.0 250.0 0 burst length (ms) QT1103, average Idd (190ms optimized LP operation) 500.0 400.0 300.0 200.0 100.0 0 burst length (ms) lQ 1000 ...
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... QT1103, average Idd (190ms LP operation) 500.0 400.0 300.0 200.0 100.0 0 burst length (ms) lQ 1000.0 Vdd=5V Vdd=4V Vdd=3.3V Vdd=2. Vdd=5V Vdd=4V Vdd=3.3V Vdd=2. QT1103, average Idd (110ms LP operation) 800.0 600.0 400.0 200.0 0 burst length (ms) QT1103_3R0.03_0607 Vdd=5V Vdd=4V Vdd=3.3V Vdd=2.8V ...
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... LP Mode Typical Response Times Response Time vs Vdd - 70ms Setting 2.5 3 3.5 4 Vdd lQ 140 130 120 110 100 90 80 4.5 5 5.5 Response Time vs Vdd - 190ms Setting 240 230 220 210 200 190 180 170 160 150 2.50 3.00 3.50 4.00 Vdd 18 Response Time vs Vdd - 110ms Setting 2.50 3.00 3.50 4.00 Vdd 4.50 5.00 5.50 QT1103_3R0.03_0607 4.50 5.00 5.50 ...
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... Note: that there is no functional requirement for the large pad on the underside of the 32-QFN package to be soldered to the substrate. If the final application does require this area to be soldered for mechanical reasons, the pad(s) to which it is soldered to must be isolated and contained under the 32-QFN footprint only 0.95 0.02 0.05 0.25 0.32 0.20 REF - 5.00 5.10 - 3.65 5.00 5.10 - 3.65 0.50 - 0.40 0.50 - 0.075 19 QT1103_3R0.03_0607 ...
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... Moisture Sensitivity Level (MSL) MSL Rating MSL3 Lq YYWWG run nr. 'run nr Digit Run Number Peak Body Temperature O 260 C 20 QRG Part Number QRG Revision Code ‘YY’ = Year of manufacture ‘WW’ = Week of manufacture ‘G’ = Green/RoHS Compliant Specifications IPC/JEDEC J-STD-020C QT1103_3R0.03_0607 ...
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... A minor chip revision (N) is defined as a revision change which does not affect product functionality or datasheet. lQ Part Number QT1103_MXN.nn_mmyy N = Minor chip revision Prereleased Product [ Released Product]) The value only stated for released parts (R). 21 Datasheet Issue Number Datasheet Release Date; (Where mm = Month Year) QT1103_3R0.03_0607 ...
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LQ 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 QRG’s Terms and Conditions of ...