AD7143ACPZ Analog Devices Inc, AD7143ACPZ Datasheet - Page 2

• Manufacturer Part Number: AD7143ACPZ
• Description: IC, CDC, 16BIT, SMD, LFCSP-16, 7143
• Manufacturer: Analog Devices Inc

Specifications of AD7143ACPZ

• Supply Voltage Range: 2.6V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: LFCSP
• No. Of Pins: 16
• Svhc: No SVHC (18-Jun-2010)
• Package / Case: LFCSP
• Base Number: 7143
• Ic Function: Programmable Controller For Capacitance Touch Sensors
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD7143
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 6
Pin Configurations and Function Descriptions ........................... 7
Typical Performance Characteristics ............................................. 8
Theory of Operation ...................................................................... 11
Capacitance Sensor Input Configuration.................................... 13
Capacitiance-to-Digital Converter............................................... 14
Noncontact Proximity Detection ................................................. 17
REVISION HISTORY
1/07—Revision 0: Initial Version
I
ESD Caution.................................................................................. 6
Capacitance Sensing Theory..................................................... 11
Operating Modes........................................................................ 12
CIN Input Multiplexer Setup .................................................... 13
Oversampling the CDC Output ............................................... 14
Capacitance Sensor Offset Control.......................................... 14
Conversion Sequencer ............................................................... 14
CDC Conversion Sequence Time ............................................ 15
CDC Conversion Results........................................................... 16
Recalibration ............................................................................... 17
2
C Timing Specifications............................................................ 5
Rev. 0 | Page 2 of 56
Environmental Calibration ........................................................... 22
Adaptive Threshold and Sensitivity ............................................. 25
Interrupt Output............................................................................. 26
Serial Interface ................................................................................ 28
PCB Design Guidelines ................................................................. 31
Power-Up Sequence ....................................................................... 32
Typical Application Circuits ......................................................... 33
Register Map ................................................................................... 34
Detailed Register Descriptions ..................................................... 35
Outline Dimensions ....................................................................... 55
Proximity Sensitivity.................................................................. 17
Slow FIFO.................................................................................... 19
SLOW_FILTER_UPDATE_LVL .............................................. 19
Capacitance Sensor Behavior without Calibration................ 22
Capacitance Sensor Behavior with Calibration...................... 23
CDC Conversion Complete Interrupt..................................... 26
Sensor Touch Interrupt.............................................................. 26
I
Capacitive Sensor Board Mechanical Specifications ............. 31
Chip Scale Packages ................................................................... 31
Bank 1 Registers ......................................................................... 35
Bank 2 Registers ......................................................................... 43
Bank 3 Registers ......................................................................... 47
Ordering Guide .......................................................................... 55
2
C Compatible Interface........................................................... 28