參數(shù)資料
型號: AT42QT2161-MMU
廠商: Atmel
文件頁數(shù): 9/14頁
文件大?。?/td> 0K
描述: IC TOUCH SENSOR 16KEY 28QFN
標(biāo)準(zhǔn)包裝: 1
系列: QMatrix™, QSlide™
類型: 電容性
觸摸面板接口: 8,2 線
輸入數(shù)/鍵: 16 鍵,滑塊
分辨率(位): 10 b
評估套件: *
數(shù)據(jù)接口: I²C,串行
電壓基準(zhǔn): 內(nèi)部
電源電壓: 1.8 V ~ 5.5 V
電流 - 電源: 1.14mA
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 28-VQFN
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: AT42QT2161-MMUDKR
4
9614A–AT42–08/10
AT42QT2161
1.3
Schematics
Figure 1-1.
Typical Circuit
Re Figure 1-1 check the following sections for component values:
Section 3.3 on page 8: Cs capacitors (Cs0 – Cs1)
Section Note: on page 10: Sample resistors (Rs0 – Rs1)
Section 3.7 on page 10: Matrix resistors (Rx0 – Rx7, Ry0 – Ry1)
Section 5.4 on page 23: SDA, SCL pull-up resistors (Rp)
Section 3.2 on page 8: CHANGE resistor (Rchg)
Section 3.2 on page 8: I2C-compatible addresses
Rp
MA
TRIX
Y
S
CAN
IN
MA
TRIX
X
DRIVE
Rchg
VREG
Rx0
Rx3
Rx6
VDD
SCL
SDA
Rs1
Cs0
Cs1
Ry1
Rx2
Rx1
Rx7
Rx5
Vunreg
VDD
Ry0
Rx4
CHANGE
I2C
I2C ADDRESS
SELECT
QT2161
Rs0
General purpose
inputs/outputs
Notes:
1) the central pad on the underside of the chip is a
Vss pin and should be connected to ground.
Do not put any other tracks underneath the body
of the chip.
2) it is important to place all Rx, Ry, Cs and Rs
components physically near to the chip.
3) leave YnA, YnB unconnected
if not used.
follow regulator manufacturer’s recommended values for input
and output bypass capacitors.
tightly wire a 100 nF bypass capacitor between Vdd and Vss (pins 3 and 4).
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