參數(shù)資料
型號(hào): QT60248C-ASG
廠商: Atmel
文件頁(yè)數(shù): 20/28頁(yè)
文件大?。?/td> 0K
描述: IC TOUCH SENSOR 24KEY 32TQFP
標(biāo)準(zhǔn)包裝: 250
系列: QMatrix™, QProx™
類型: 電容性
輸入數(shù)/鍵: 24
分辨率(位): 9,11 b
評(píng)估套件: 可供
數(shù)據(jù)接口: 串行,SPI?
電源電壓: 3 V ~ 5 V
電流 - 電源: 25mA
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 32-TQFP
供應(yīng)商設(shè)備封裝: 32-TQFP(7x7)
包裝: 托盤(pán)
配用: 427-1087-ND - BOARD EVAL QT60248-AS QMATRIX
7.2 1-Sided Key Layout
This key design can be made on a 1-sided SMT PCB. A single 0-ohm jumper
allows the wiring to be done on a single side with full pass-through of X and Y
traces to allow matrix connections to be made across a large number of keys.
Key size, shape, and number of interleavings can be varied substantially from
this drawing. The below drawing shows 6 interleave white spaces; only a
double interleave is required in the case of smaller keys.
The PCB is bonded to a panel on its underside, and the fields fire through the
PCB, adhesive, and panel in that sequence. This results in a very low cost
design.
7.3 PCB Layout
Shown is an example PCB layout using inexpensive 1-sided CEM-1 or FR-1 PCB laminate. The key layouts follow the design
rules shown above. (PCB design shown uses a QT60326 chip but still represents a good example).
lQ
27
QT60248-AS R4.02/0405
X
Y
X
Y
0-ohm SMT Jumper
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