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| 型號： | AD7879-1WARUZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/41頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT CTRLR TOUCH 16TSSOP |
| 標準包裝： | 2,500 |
| 類型： | 電阻 |
| 觸摸面板接口： | 4 線 |
| 輸入數(shù)/鍵： | 1 TSC |
| 分辨率（位）： | 12 b |
| 評估套件： | * |
| 數(shù)據(jù)接口： | I²C，串行 |
| 數(shù)據(jù)速率/采樣率 (SPS，BPS)： | 105k |
| 電壓基準： | 內(nèi)部 |
| 電源電壓： | 1.6 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 16-TSSOP |
| 包裝： | 帶卷 (TR) |
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Low Voltage Controller for Touch Screens
AD7879/AD7889
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2008–2010 Analog Devices, Inc. All rights reserved.
FEATURES
4-wire touch screen interface
1.6 V to 3.6 V operation
Median and averaging filter to reduce noise
Automatic conversion sequencer and timer
User-programmable conversion parameters
Auxiliary analog input/battery monitor (0.5 V to 5 V)
1 optional GPIO
Interrupt outputs (INT, PENIRQ)
Touch-pressure measurement
Wake-up on touch function
Shutdown mode: 6 μA maximum
12-ball, 1.6 mm × 2 mm WLCSP
16-lead, 4 mm × 4 mm LFCSP
APPLICATIONS
Personal digital assistants
Smart handheld devices
Touch screen monitors
Point-of-sale terminals
Medical devices
Cell phones
FUNCTIONAL BLOCK DIAGRAM
REF+
X– Y– X+ Y+
FI
L
T
E
R
IN
G
RESULT
REGISTERS
CONTROL
REGISTERS
SEQUENCER
AND TIMER
REF–
TEMPERATURE
SENSOR
TO
RESULT
REGISTERS
6-
TO
-1
M
U
X
AD7879/
AD7879-1/
AD7889/
AD7889-1
VCC/REF
X+
X–
Y+
Y–
GND
A
U
X
/V
B
A
T/G
P
IO
P
E
NI
RQ
/I
NT
/D
A
V
SERIAL PORT
DIN/
ADD1
DOUT/
SDA
SCL
CS/
ADD0
12-BIT
SAR ADC
REF–
07
66
7-
00
1
Figure 1.
GENERAL DESCRIPTION
The AD7879/AD7889 are 12-bit successive approximation
analog-to-digital converters (SAR ADCs) with a synchronous
serial interface and low on-resistance switches for driving 4-wire
resistive touch screens. The AD7879/AD7889 work with a very
low power supply—a single 1.6 V to 3.6 V supply—and feature
throughput rates of 105 kSPS. The devices include a shutdown
mode that reduces current consumption to less than 6 μA.
To reduce the effects of noise from LCDs and other sources, the
AD7879/AD7889 contain a preprocessing block. The prepro-
cessing function consists of a median filter and an averaging
filter. The combination of these two filters provides a more robust
solution, discarding the spurious noise in the signal and keeping
only the data of interest. The size of both filters is programmable.
Other user-programmable conversion controls include variable
acquisition time and first conversion delay; up to 16 averages
can be taken per conversion. The AD7879/AD7889 can run in
slave mode or standalone (master) mode, using an automatic
conversion sequencer and timer.
The AD7879/AD7889 have a programmable pin that can operate
as an auxiliary input to the ADC, as a battery monitor, or as a
GPIO. In addition, a programmable interrupt output can operate
in three modes: as a general-purpose interrupt to signal when
new data is available (DAV), as an interrupt to indicate when
limits are exceeded (INT), or as a pen-down interrupt when the
screen is touched (PENIRQ). The AD7879/AD7889 offer temp-
erature measurement and touch-pressure measurement.
The AD7879 is available in a 12-ball, 1.6 mm × 2 mm WLCSP
and in a 16-lead, 4 mm × 4 mm LFCSP. The AD7889 is available
in a backside-coated version of the WLCSP. Both parts support
an SPI interface (AD7879/AD7889) or an I2C interface
(AD7879-1/AD7889-1).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7879-1WARUZ-RL7 | 功能描述:IC ADC 12BIT CTRLR TOUCH 16TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR) |
| AD7879ACBZ-500R7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Voltage Controller for Touch Screens |
| AD7879ACBZ-RL | 制造商:Analog Devices 功能描述: |
| AD7879ACPZ-500R7 | 制造商:Analog Devices 功能描述:TOUCH SCREEN CONTROLLER - Tape and Reel 制造商:Analog Devices 功能描述:ADC 12BIT 3.6V 105KSPS SPI 16LFCSP 制造商:Analog Devices 功能描述:ADC, 12BIT, 3.6V, 105KSPS, SPI, 16LFCSP 制造商:Analog Devices 功能描述:ADC, 12BIT, 3.6V, 105KSPS, SPI, 16LFCSP; Resolution (Bits):12bit; Sampling Rate:105kSPS; Digital IC Case Style:LFCSP; No. of Pins:16; Input Channel Type:Single Ended; Data Interface:SPI; Operating Temperature Min:-40C; Operating ;RoHS Compliant: Yes |
| AD7879ACPZ-RL | 功能描述:IC ADC 12BIT CTLR TOUCH 16LFCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR) |
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