参数资料
型号: AT42QT2161-MMU
厂商: Atmel
文件页数: 9/14页
文件大小: 0K
描述: IC TOUCH SENSOR 16KEY 28QFN
标准包装: 1
系列: QMatrix™, QSlide™
类型: 电容性
触摸面板接口: 8,2 线
输入数/键: 16 键,滑块
分辨率(位): 10 b
评估套件: *
数据接口: I²C,串行
电压基准: 内部
电源电压: 1.8 V ~ 5.5 V
电流 - 电源: 1.14mA
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-VFQFN 裸露焊盘
供应商设备封装: 28-VQFN
包装: 标准包装
其它名称: 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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