參數(shù)資料
型號(hào)： AT42QT1111-AU
廠商： ATMEL CORP
元件分類： 速度傳感器和接近開(kāi)關(guān)
英文描述： PROXIMITY SENSOR-CAPACITIVE, 0-5V, SQUARE, SURFACE MOUNT
封裝： 7 X 7 MM, 1 MM HEIGHT, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MS-026ABA, TQFP-32
文件頁(yè)數(shù)： 50/50頁(yè)
文件大小： 637K
代理商： AT42QT1111-AU
9
9571B–AT42–08/10
AT42QT1111-MU/AT42QT1111-AU
3.5
Power Supply
See Section 8.2 on page 38 for the power supply range. If the power supply fluctuates slowly
with temperature, the device tracks and compensates for these changes automatically with only
minor changes in sensitivity. If the supply voltage drifts or shifts quickly, the drift compensation
mechanism is not able to keep up, causing sensitivity anomalies or false detections.
The usual power supply considerations with QT parts apply to the device. The power should be
clean and come from a separate regulator if possible. However, this device is designed to
minimize the effects of unstable power, and, except in extreme conditions, should not require a
separate Low Dropout (LDO) regulator.
See underneath Figure 1.3 on page 4 for suggested regulator manufacturers.
It is assumed that a larger bypass capacitor (like1 F) is somewhere else in the power circuit; for
example, near the regulator.
3.6
MLF Package Restrictions
The central pad on the underside of the MLF chip should be connected to ground. Do not run
any tracks underneath the body of the chip, only ground. Figure 3-1 shows an example of
good/bad tracking.
Figure 3-1.
Examples of Good and Bad Tracking
Caution: A regulator IC shared with other logic can result in erratic operation and is
not advised.
A single ceramic 0.1 F bypass capacitor, with short traces, should be placed very
close to the power pins of the IC. Failure to do so can result in device oscillation,
high current consumption, erratic operation etc.
Example of GOOD Tracking
Example of BAD Tracking
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT42QT1111-AU QS383 制造商:Atmel Corporation 功能描述:QTOUCH 11 KEY TOUCH SENSOR IC
AT42QT1111MU 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:QTouch? 11-key Sensor IC
AT42QT1111-MU 功能描述:電容觸摸傳感器 QTouch 11 Key Touch Sensor IC RoHS:否 制造商:Microchip Technology 電源電壓: 通道數(shù)量: 封裝 / 箱體: 尺寸: 溫度范圍:
AT42QT1111-MU QS384 制造商:Atmel Corporation 功能描述:QTOUCH 11 KEY TOUCH SENSOR IC
AT42QT1244-AU 功能描述:電容觸摸傳感器 QMatrix FMEA 24 Key Sensor IC RoHS:否 制造商:Microchip Technology 電源電壓: 通道數(shù)量: 封裝 / 箱體: 尺寸: 溫度范圍:
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