SNVSBF7
November 2019
LDC1001
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Axial Distance Sensing Application
4
Revision History
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Condition
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Timing Requirements
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Inductive Sensing
7.3.2
Measuring RP With LDC1001
7.3.3
Measuring Inductance With LDC1001
7.4
Device Functional Modes
7.4.1
Power Modes
7.4.2
INTB Pin Modes
7.4.2.1
Comparator Mode
7.4.2.2
Wake-Up Mode
7.4.2.3
DRDY Mode
7.5
Programming
7.5.1
SPI Description
7.5.1.1
Extended SPI Transactions
7.6
Register Maps
7.6.1
Register Description
7.6.1.1
Revision ID (Address = 0x00)
7.6.1.2
RP_MAX (Address = 0x01)
7.6.1.3
RP_MIN (Address = 0x02)
7.6.1.4
Watchdog Timer Frequency (Address = 0x03)
7.6.1.5
LDC Configuration (Address = 0x04)
7.6.1.6
Clock Configuration (Address = 0x05)
7.6.1.7
Comparator Threshold High LSB (Address = 0x06)
7.6.1.8
Comparator Threshold High MSB (Address = 0x07)
7.6.1.9
Comparator Threshold Low LSB (Address = 0x08)
7.6.1.10
Comparator Threshold Low MSB (Address = 0x09)
7.6.1.11
INTB Pin Configuration (Address = 0x0A)
7.6.1.12
Power Configuration (Address = 0x0B)
7.6.1.13
Status (Address = 0x20)
7.6.1.14
Proximity Data LSB (Address = 0x21)
7.6.1.15
Proximity Data MSB (Address = 0x22)
7.6.1.16
Frequency Counter LSB (Address = 0x23)
7.6.1.17
Frequency Counter Mid-Byte (Address = 0x24)
7.6.1.18
Frequency Counter MSB (Address = 0x25)
8
Application and Implementation
8.1
Application Information
8.1.1
Calculation of RP_MIN and RP_MAX
8.1.1.1
RP_MAX
8.1.1.2
RP_MIN
8.1.2
Output Data Rate
8.1.3
Choosing Filter Capacitor (CFA and CFB Pins)
8.2
Typical Application
8.2.1
Axial Distance Sensing Using a PCB Sensor With LDC1001
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Sensor and Target
8.2.1.2.2
Calculating Sensor Capacitor
8.2.1.2.3
Choosing Filter Capacitor
8.2.1.2.4
Setting RP_MIN and RP_MAX
8.2.1.2.5
Calculating Minimum Sensor Frequency
8.2.1.3
Application Curve
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Documentation Support
11.1.1
Related Documentation
11.2
Support Resources
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
NHR|16
MPDS426
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvsbf7_oa
snvsbf7_pm
10.2
Layout Example
Figure 21.
LDC1001 Board Layout