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| 型號(hào)： | AD7873ACPZ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 1/29頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT TOUCHSCREEN 16LFCSP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類(lèi)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(píng)估套件： | 可供 |
| 數(shù)據(jù)接口： | 串行 |
| 數(shù)據(jù)速率/采樣率 (SPS，BPS)： | 125k |
| 電壓基準(zhǔn)： | 外部，內(nèi)部 |
| 電源電壓： | 2.2 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 16-VQFN 裸露焊盤(pán)，CSP |
| 供應(yīng)商設(shè)備封裝： | 16-LFCSP-VQ EP（4x4） |
| 包裝： | 托盤(pán) |
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Touch Screen Digitizer
Data Sheet
Rev. F
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
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
2013 Analog Devices, Inc. All rights reserved.
FEATURES
4-wire touch screen interface
On-chip temperature sensor: 40°C to +85°C
On-chip 2.5 V reference
Direct battery measurement (0 V to 6 V)
Touch pressure measurement
Specified throughput rate of 125 kSPS
Single supply, VCC of 2.2 V to 5.25 V
Ratiometric conversion
High speed serial interface
Programmable 8-bit or 12-bit resolution
One auxiliary analog input
Shutdown mode: 1 A maximum
16-lead QSOP, TSSOP, and LFCSP packages
APPLICATIONS
Personal digital assistants
Smart hand-held devices
Touch screen monitors
Point-of-sale terminals
Pagers
GENERAL DESCRIPTION
The AD7873 is a 12-bit successive approximation ADC with a
synchronous serial interface and low on resistance switches for
driving touch screens. The AD7873 operates from a single 2.2 V
to 5.25 V supply, with a throughput rate of 125 kSPS.
The AD7873 features direct battery measurement, temperature
measurement, and touch pressure measurement. The AD7873
also has an on-board reference of 2.5 V that can be used for the
auxiliary input, battery monitor, and temperature measurement
modes. When not in use, the internal reference can be shut
down to conserve power. An external reference can also be
applied and varied from 1 V to VCC with an analog input range
from 0 V to VREF. The device includes a shutdown mode that
reduces the current consumption to less than 1 A.
The AD7873 features on-board switches. This, coupled with low
power and high speed operation, makes the device ideal for
battery-powered systems with resistive touch screens. The part
is available in a 16-lead, 0.15 inch quarter size outline package
(QSOP), a 16-lead, thin shrink small outline package (TSSOP),
and a 16-lead, lead frame chip scale package (LFCSP).
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
PRODUCT HIGHLIGHTS
1. Ratiometric conversion mode available, eliminating errors
due to on-board switch resistances.
2. On-board temperature sensor: 40°C to +85°C.
3. Battery monitor input.
4. Touch pressure measurement capability.
5. Low power consumption of 1.37 mW maximum with the
reference off, or 2.41 mW typical with the reference on, at
125 kSPS and VCC at 3.6 V.
6. Package options include 4 mm × 4 mm LFCSP.
7. Analog input range from 0 V to VREF.
8. Versatile serial I/O ports.
AD7873
+VCC
PENIRQ
SPORT
DIN
DOUT
DCLK
BUSY
CS
PEN
INTERRUPT
CHARGE
REDISTRIBUTION
DAC
SAR + ADC
CONTROL LOGIC
6-TO-1
I/P
MUX
T/H
COMP
GND
TEMP
SENSOR
BATTERY
MONITOR
Y+
Y–
AUX
2.5V
REF
X+
X–
VREF
VBAT
BUF
02164-
001
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| AD7873ACPZ3 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Touch Screen Digitizer |
| AD7873ACPZ-REEL | 功能描述:IC ADC 12BIT TOUCHSCREEN 16LFCSP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標(biāo)準(zhǔn)包裝:96 系列:- 類(lèi)型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評(píng)估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準(zhǔn):- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類(lèi)型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| AD7873ACPZ-REEL7 | 功能描述:IC ADC 12BIT TOUCHSCREEN 16LFCSP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標(biāo)準(zhǔn)包裝:96 系列:- 類(lèi)型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評(píng)估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準(zhǔn):- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類(lèi)型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| AD7873ARQ | 制造商:Analog Devices 功能描述:TOUCH SCREEN DIGITIZER 制造商:Rochester Electronics LLC 功能描述:2.7V 12-BIT TOUCH SCREEN DIGITIZER I.C. - Bulk 制造商:Analog Devices 功能描述:IC 12-BIT ADC |
| AD7873ARQ-REEL | 制造商:Analog Devices 功能描述:TOUCH SCREEN DIGITIZER 制造商:Rochester Electronics LLC 功能描述:2.7V 12-BIT TOUCH SCREEN DIGITIZER I.C. - Tape and Reel |
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