AD7156BCPZ-REEL7 Analog Devices Inc, AD7156BCPZ-REEL7 Datasheet - Page 2

• Manufacturer Part Number: AD7156BCPZ-REEL7
• Description: IC CDC 2CH 12BIT 1.8V 10LFCSP
• Manufacturer: Analog Devices Inc
• Type: Capacitance-to-Digital Converterr

Specifications of AD7156BCPZ-REEL7

• Resolution (bits): 12 b
• Data Interface: Serial
• Sampling Rate (per Second): 100k
• Voltage Supply Source: Single Supply
• Voltage - Supply: 1.8 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-LFCSP
• Sampling Rate: 100SPS
• Input Channel Type: Single Ended
• Supply Voltage Range - Analog: 1.8V To 3.6V
• Supply Current: 70µA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: AD7156BCPZ-REEL7TR

AD7156
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 6
Pin Configuration and Function Descriptions ............................. 7
Typical Performance Characteristics ............................................. 8
Theory of Operation ...................................................................... 11
Register Descriptions ..................................................................... 15
REVISION HISTORY
10/08—Revision 0: Initial Version
Timing Specifications .................................................................. 5
ESD Caution .................................................................................. 6
Capacitance-to-Digital Converter ............................................ 11
CAPDAC ..................................................................................... 11
Comparator and Threshold Modes .......................................... 12
Adaptive Threshold .................................................................... 12
Sensitivity..................................................................................... 12
Data Average ............................................................................... 13
Hysteresis ..................................................................................... 13
Timeout ........................................................................................ 13
Auto-DAC Adjustment .............................................................. 14
Power-Down Timer ................................................................... 14
Status Register ............................................................................. 16
Data Registers ............................................................................. 17
Average Registers ........................................................................ 18
Rev. 0 | Page 2 of 28
Serial Interface ................................................................................ 22
Hardware Design Considerations ................................................ 24
Outline Dimensions ....................................................................... 27
Fixed Threshold Registers ......................................................... 18
Sensitivity Registers ................................................................... 18
Timeout Registers ....................................................................... 18
Setup Registers ............................................................................ 19
Configuration Register .............................................................. 20
Power-Down Timer Register .................................................... 21
CAPDAC Registers .................................................................... 21
Serial Number Register .............................................................. 21
Chip ID Register ......................................................................... 21
Read Operation........................................................................... 22
Write Operation.......................................................................... 22
AD7156 Reset ............................................................................. 23
General Call ................................................................................ 23
Overview ..................................................................................... 24
Parasitic Capacitance to Ground .............................................. 24
Parasitic Resistance to Ground ................................................. 24
Parasitic Parallel Resistance ...................................................... 24
Parasitic Serial Resistance ......................................................... 25
Input Overvoltage Protection ................................................... 25
Input EMC Protection ............................................................... 25
Power Supply Decoupling and Filtering .................................. 25
Application Examples ................................................................ 26
Ordering Guide .......................................................................... 27