AD7879-1ACBZ-500R7 datasheet, PDF

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AD7879-1ACBZ-500R7: Description2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC16; Categorysemiconductor logic; File Size916KB，40 Pages; ManufacturerADI; Websitehttps://www.analog.com

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AD7879-1ACBZ-500R7 Overview

2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC16

AD7879-1ACBZ-500R7 Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	16
Maximum operating temperature	85 Cel
Minimum operating temperature	-40 Cel
Rated supply voltage	2.6 V
Maximum linear error	0.0732 %
Maximum limit analog input voltage	3.6 V
Minimum limit analog input voltage	0.0 V
Processing package description	4 X 4 MM, ROHS COMPLIANT, MO-220VGGC, LFCSP-16
Lead-free	Yes
EU RoHS regulations	Yes
state	ACTIVE
packaging shape	SQUARE
Package Size	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
surface mount	Yes
Terminal form	NO LEAD
Terminal spacing	0.6500 mm
terminal coating	MATTE TIN
Terminal location	QUAD
Packaging Materials	UNSPECIFIED
Temperature level	INDUSTRIAL
Sampling Rate	0.1050 MHz
Output format	SERIAL
Type of converter	SUCCESSIVE APPROXIMATION
Number of digits	12
Output bit encoding	BINARY
Number of analog channels	2
Sample and hold and track and hold	TRACK

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½电压触摸屏控制器

AD7879/AD7889

特性

4线触摸屏接口

工½电压：1.6

V至3.6 V

中值滤波器与均值滤波器，用于降½噪声

自动½换序列器与定时器

用户可编程的½换参数

辅助模拟输入/电池监控器(0.5

V至5 V)

1个可选的通用输入/输出接口(GPIO)

中断输出(INT、PENIRQ)

触摸压力测量

触摸唤醒功½

关断模式：6

µA(最大值)

12引脚1.6 mm × 2 mm WLCSP封装

16引脚、4 mm × 4 mm LFCSP封装

/REF

功½框图

X– Y– X+ Y+

X+

X–

REF–

Y+

6-TO-1 MUX

REF–

REF+

Y–

GND

TEMPERATURE

SENSOR

12-BIT

SAR ADC

FILTERING

RESULT

REGISTERS

PENIRQ/INT/DAV

AUX/VBAT/GPIO

AD7879/

AD7879-1/

AD7889/

AD7889-1

CONTROL

REGISTERS

应用

个人数字助理

智½型手持设备

触摸屏监控器

POS终端机

医疗设备

蜂窝电话

RESULT

REGISTERS

SERIAL PORT

SEQUENCER

AND TIMER

CS/

DIN/ DOUT/ SCL

ADD0 ADD1 SDA

图1.

INT

概述

AD7879/AD7889是12½逐次逼近型模数½换器(SAR ADC)，

具有同步串行接口以及用于驱动4线电阻式触摸屏的½导通

电阻开关。AD7879/AD7889工½电源电压极½，采用1.6

V至

3.6 V单电源供电，吞吐速率为105 kSPS。两款器件具有关断

模式，此模式下功耗不足6

µA。

为了降 ½ 来自

LCD噪

声以及其它噪声源的 ½ 响，

AD7879/AD7889内½预处理模块。预处理功½包括中值滤波

器及均值滤波器。这两个滤波器的结合提供了更稳定的解

决方案，½滤除信号中的杂散噪声，而只保留有用的数

据。两个滤波器的大小½可以设½。其它用户可编程½换

控制包括可变采集时间及第一次½换延迟。每次½换可利

用多达16个采样点来计算均值。AD7879/AD7889采用自动½

换序列器与定时器，可以在从模式或独立(主)模式下工½。

AD7879/AD7889拥有可编程引脚，可以用½到ADC的辅助

输入、电池监控器或GPIO。此外，可编程中断输出有三

种工½模式：½为新数据可用时的通用中断(DAV)；½为

超出限值时的中断(INT)；或者½为屏幕被触摸时的触控

笔按下中断(PENIRQ)。AD7879/AD7889可提供温度与触摸

压力测量。

AD7879提供12引脚、1.6 mm × 2 mm WLCSP和16引脚、4 mm

× 4 mm LFCSP两种封装。AD7889采用背面镀膜WLCSP封

装。两款器件均支持SPI接口(AD7879/AD7889)或I

C接口

(AD7879-1/AD7889-1)。

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Speci cations subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

Rev. C

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

ADI中文版数据手册是英文版数据手册的译文，敬请谅解翻译中可½存在的语言组织或翻译错误，ADI不对翻译中存在的差异或由此产生的错误负责。如需确认任½词语的准确性，请参考ADI提供

的最新英文版数据手册。

07667-001

AD7879/AD7889

目½

特性.....................................................................................................1

应用.....................................................................................................1

功½框图

............................................................................................1

概述.....................................................................................................1

修订历史

............................................................................................2

技术规格

............................................................................................3

SPI时序规格(AD7879/AD7889)...........................................4

C时序规格(AD7879-1/AD7889-1)....................................5

绝对最大额定值...............................................................................6

热阻

............................................................................................6

ESD警告 ....................................................................................6

引脚配½和功½描述

......................................................................7

典型工½特性

...................................................................................9

术语...................................................................................................12

工½原理

.................................................................................13

触摸屏原理

.............................................................................13

触摸屏输入信号测量

...........................................................14

触摸压力测量.........................................................................15

温度测量

..........................................................................................15

中值滤波器和均值滤波器

...........................................................17

AUX/VBAT/GPIO引脚.................................................................18

辅助输入..................................................................................18

电池输入..................................................................................18

限值比较..................................................................................18

GPIO.........................................................................................18

寄存器映射......................................................................................20

寄存器详解......................................................................................21

控制寄存器......................................................................................25

控制寄存器1

...........................................................................25

控制寄存器2

...........................................................................27

控制寄存器3

...........................................................................28

中断

..........................................................................................29

AD7879/AD7889与主机CPU同步......................................30

串行接口

..........................................................................................31

SPI接口 ....................................................................................31

C兼容型接口........................................................................33

接地和布局......................................................................................36

引脚架构芯片规模封装(LFCSP)

.......................................36

WLCSP装配考虑....................................................................36

外½尺寸

..........................................................................................37

订购指南..................................................................................38

更改表13

..........................................................................................22

更改ADC通道(控制寄存器1½[14:12])部分

............................26

更改电源管理(控制寄存器2½[15:14])部分...............................7

更改DAV—数据可用中断部分

..................................................29

更改INT—超限中断部分.............................................................29

更改写入数据部分

........................................................................31

更改读取数据部分和图40

...........................................................32

更改图41

..........................................................................................33

更改通过I

C总线写入数据部分 .................................................34

更改图44

..........................................................................................35

更新外½尺寸

.................................................................................37

更改订购指南部分

........................................................................38

2008年10月—修订版0：初始版

修订历史

2010年1月—修订版A至修订版B

更新外½尺寸

.................................................................................37

更改订购指南部分

........................................................................38

2009年3月—修订版0至修订版A

增加AD7889和背面镀膜WLCSP封装

..................................

通用

更改电池监控器的输入电压范围参数

.......................................3

更改表4

..............................................................................................6

增加热阻部分和表5；重新排序

..................................................6

更改引脚配½和功½描述部分

....................................................7

增加表7

..............................................................................................8

更改第一种方法部分

....................................................................15

更改中值滤波器和均值滤波器部分..........................................17

更改GPIO中断½½(½12、控制寄存器3、地址0x03)部分

...........................................................................................................19

Rev. C | Page 2 of 40

AD7879-1ACBZ-500R7 Related Products

	AD7879-1ACBZ-500R7	AD7879	AD7879ACBZ-500R7	AD7879-1ACBZ-RL	AD7889ACBZ-500R7
Description	2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC16	2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC16	2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC16	2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PBGA12	IC SCREEN CNTRL 12BIT 12WLCSP
Number of functions	1	1	1	1	-
Number of terminals	16	16	16	12	-
Maximum operating temperature	85 Cel	85 Cel	85 Cel	85 Cel	-
Minimum operating temperature	-40 Cel	-40 Cel	-40 Cel	-40 Cel	-
Rated supply voltage	2.6 V	2.6 V	2.6 V	2.6 V	-
Maximum linear error	0.0732 %	0.0732 %	0.0732 %	0.0732 %	-
Maximum limit analog input voltage	3.6 V	3.6 V	3.6 V	3.6 V	-
Minimum limit analog input voltage	0.0 V	0.0 V	0.0 V	0.0 V	-
Processing package description	4 X 4 MM, ROHS COMPLIANT, MO-220VGGC, LFCSP-16	4 X 4 MM, ROHS COMPLIANT, MO-220VGGC, LFCSP-16	4 X 4 MM, ROHS COMPLIANT, MO-220VGGC, LFCSP-16	1.60 × 2 MM, ROHS COMPLIANT, WLCSP-12	-
Lead-free	Yes	Yes	Yes	Yes	-
EU RoHS regulations	Yes	Yes	Yes	Yes	-
state	ACTIVE	ACTIVE	ACTIVE	ACTIVE	-
packaging shape	SQUARE	SQUARE	SQUARE	Rectangle	-
Package Size	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	GRID 阵列, VERY THIN PROFILE, FINE PITCH	-
surface mount	Yes	Yes	Yes	Yes	-
Terminal form	NO LEAD	NO LEAD	NO LEAD	BALL	-
Terminal spacing	0.6500 mm	0.6500 mm	0.6500 mm	0.5000 mm	-
terminal coating	MATTE TIN	MATTE TIN	MATTE TIN	MATTE Tin	-
Terminal location	QUAD	QUAD	QUAD	BOTTOM	-
Packaging Materials	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED	Plastic/Epoxy	-
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	-
Sampling Rate	0.1050 MHz	0.1050 MHz	0.1050 MHz	0.1050 MHz	-
Output format	SERIAL	SERIAL	SERIAL	serial	-
Type of converter	SUCCESSIVE APPROXIMATION	SUCCESSIVE APPROXIMATION	SUCCESSIVE APPROXIMATION	continuous approximation	-
Number of digits	12	12	12	12	-
Output bit encoding	BINARY	BINARY	BINARY	binary	-
Number of analog channels	2	2	2	2	-
Sample and hold and track and hold	TRACK	TRACK	TRACK	TRACK	-

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