参数资料
型号: AD7879-1WACPZ-RL
厂商: Analog Devices Inc
文件页数: 41/41页
文件大小: 0K
描述: IC ADC 12BIT CTRLR TOUCH 16LFCSP
标准包装: 5,000
类型: 电阻
触摸面板接口: 4 线
输入数/键: 1 TSC
分辨率(位): 12 b
评估套件: *
数据接口: I²C,串行
数据速率/采样率 (SPS,BPS): 105k
电压基准: 内部
电源电压: 1.6 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-VQFN 裸露焊盘,CSP
供应商设备封装: 16-LFCSP-VQ EP(4x4)
包装: 带卷 (TR)
AD7879/AD7889
Rev. C | Page 8 of 40
07667-
007
PIN 1
INDICATOR
1
Y+
2
NC
3
NC
4
X–
11 NC
12
10 NC
9
DOUT
5
Y–
6
DI
N
7
G
ND
8
SCL
15
V
CC
/RE
F
16
X+
14
13
AUX
/V
B
A
T/GP
IO
AD7879
TOP VIEW
(Not to Scale)
PENIRQ/INT/DAV
CS
NOTES
1. NC = NO CONNECT
2. THE EXPOSED PAD IS NOT CONNECTED INTERNALLY.
FOR INCREASED RELIABILITY OF THE SOLDER JOINTS
AND MAXIMUM THERMAL CAPABILITY, IT IS RECOMMENDED
THAT THE PAD BE SOLDERED TO THE GROUND PLANE.
Figure 7. AD7879 LFCSP Pin Configuration
07667-
008
PIN 1
INDICATOR
1
Y+
2
NC
3
NC
4
X–
11 NC
12
10 NC
9
SDA
5
Y–
6
ADD1
7
G
ND
8
SCL
15
V
CC
/RE
F
16
X+
14
13
AUX
/V
B
A
T/GP
IO
AD7879-1
TOP VIEW
(Not to Scale)
PENIRQ/INT/DAV
ADD0
NOTES
1. NC = NO CONNECT
2. THE EXPOSED PAD IS NOT CONNECTED INTERNALLY.
FOR INCREASED RELIABILITY OF THE SOLDER JOINTS
AND MAXIMUM THERMAL CAPABILITY, IT IS RECOMMENDED
THAT THE PAD BE SOLDERED TO THE GROUND PLANE.
Figure 8. AD7879-1 LFCSP Pin Configuration
Table 7. Pin Function Descriptions, LFCSP
Pin No.
Mnemonic
Description
AD7879
AD7879-1
1
Y+
Touch Screen Input Channel.
2, 3, 10, 11
NC
No Connect.
4
X
Touch Screen Input Channel.
5
Y
Touch Screen Input Channel.
6
N/A
DIN
SPI Serial Data Input to the AD7879.
N/A
6
ADD1
I2C Address Bit 1 for the AD7879-1. This pin can be tied high or low to determine an address
for the AD7879-1 (see Table 25).
7
GND
Ground. Ground reference point for all circuitry on the AD7879. All analog input signals and
any external reference signal should be referred to this voltage.
8
SCL
Serial Interface Clock Input.
9
N/A
DOUT
SPI Serial Data Output for the AD7879.
N/A
9
SDA
I2C Serial Data Input and Output for the AD7879-1.
12
PENIRQ/INT/DAV
Interrupt Output. This pin is asserted when the screen is touched (PENIRQ), when a measure-
ment exceeds the preprogrammed limits (INT), or when new data is available in the registers
(DAV). Active low, internal 50 k pull-up resistor.
13
AUX/VBAT/GPIO
This pin can be programmed as an auxiliary input to the ADC (AUX), as a battery measure-
ment input to the ADC (VBAT), or as a general-purpose digital input/output (GPIO).
14
N/A
CS
Chip Select for the SPI Serial Interface on the AD7879. Active low.
N/A
14
ADD0
I2C Address Bit 0 for the AD7879-1. This pin can be tied high or low to determine an address
for the AD7879-1 (see Table 25).
15
VCC/REF
Power Supply Input and ADC Reference.
16
X+
Touch Screen Input Channel.
EP
Exposed Pad. The exposed pad is not connected internally. For increased reliability of the
solder joints and maximum thermal capability, it is recommended that the pad be soldered
to the ground plane.
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