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AD7877ACPZ-REEL 数据表(PDF) 3 Page - Analog Devices

部件名 AD7877ACPZ-REEL
功能描述  Touch Screen Controller
Download  46 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7877ACPZ-REEL 数据表(HTML) 3 Page - Analog Devices

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AD7877
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Specifications .................................................................. 5
Timing Diagrams.......................................................................... 5
Absolute Maximum Ratings............................................................ 6
ESD Caution.................................................................................. 6
Pin Configurations and Function Descriptions ........................... 7
Typical Performance Characteristics ............................................. 9
Terminology .................................................................................... 13
Circuit Information........................................................................ 14
Touch Screen Principles ............................................................ 14
Measuring Touch Screen Inputs............................................... 15
Touch-Pressure Measurement .................................................. 16
STOPACQ Pin ............................................................................ 16
Temperature Measurement ....................................................... 17
Battery Measurement................................................................. 18
Auxiliary Inputs.......................................................................... 19
Limit Comparison ...................................................................... 19
Control Registers............................................................................ 20
Control Register 1 ...................................................................... 20
Control Register 2 ...................................................................... 21
Sequencer Registers ................................................................... 22
Interrupts..................................................................................... 24
Synchronizing the AD7877 to the Host CPU......................... 25
8-Bit DAC ........................................................................................ 26
Serial Interface ................................................................................ 28
Writing Data ............................................................................... 28
Write Timing............................................................................... 29
Reading Data............................................................................... 29
VDRIVE Pin..................................................................................... 29
General-Purpose I/O Pins............................................................. 30
GPIO Configuration .................................................................. 30
Grounding and Layout .................................................................. 32
PCB Design Guidelines for Chip Scale Packages................... 32
Register Maps.................................................................................. 33
Detailed Register Descriptions ..................................................... 35
GPIO Registers ........................................................................... 42
Outline Dimensions....................................................................... 44
Ordering Guide .......................................................................... 45
Automotive Products................................................................. 45
REVISION HISTORY
12/14—Rev. D to Rev. E
Added Figure 50; Renumbered Sequentially .............................. 44
Updated Outline Dimensions....................................................... 44
Changes to Ordering Guide .......................................................... 45
12/11—Rev. C to Rev. D
Change to Features Section ............................................................. 1
Updated Outline Dimensions....................................................... 44
Changes to Ordering Guide .......................................................... 44
Added Automotive Products Section........................................... 44
9/09—Rev. B to Rev. C
Changes to Offset Error and Gain Error Parameters .................. 3
Added VBAT to GND Parameter ...................................................... 6
Changes to Pin 23 Description ....................................................... 7
Changes to Power Management (Control Register 2,
Bits[7:6]) Section ............................................................................ 22
Changes to Bit 7 Description (Table 17)...................................... 36
Updated Outline Dimensions....................................................... 44
Changes Ordering Guide............................................................... 44
6/06—Rev. A to Rev. B
Added Wafer Level Chip Scale Package ..........................Universal
Changes to Table 3.............................................................................6
Changes to Figure 21...................................................................... 11
Change to Figure 25 ....................................................................... 12
Changes to Figure 38 and Figure 39 ............................................ 23
Change to Figure 40 ....................................................................... 24
Changes to Data Available Output (DAV) Section.................... 24
Updated Outline Dimensions....................................................... 42
Changes to Ordering Guide.......................................................... 42
11/04—Rev. 0 to Rev. A
Changes to Absolute Maximum Ratings .......................................6
Changes to Figure 4...........................................................................7
Changes to Table 4.............................................................................7
Changes to Grounding and Layout section ................................ 32
Changes to Figure 42...................................................................... 32
Changes to Ordering Guide.......................................................... 43
7/04—Revision 0: Initial Version
Rev. E | Page 2 of 45


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