SNOSD01D
May 2015 – October 2016
LDC1101
PRODUCTION DATA.
1
Features
2
Applications
3
Description
4
Simplified Schematic
5
Revision History
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Digital Interface
7.7
Timing Requirements
7.8
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Sensor Driver
8.4
Device Functional Modes
8.4.1
Measurement Modes
8.4.2
RP+L Measurement Mode
8.4.2.1
RPMIN and RPMAX
8.4.2.2
Programmable Internal Time Constants
8.4.2.3
RP+L Mode Measurement Sample Rate
8.4.3
High Resolution L (LHR) Measurement Mode
8.4.4
Reference Count Setting
8.4.5
L-Only Measurement Operation
8.4.6
Minimum Sensor Frequency and Watchdog Setting
8.4.7
Low Power Modes
8.4.7.1
Shutdown Mode
8.4.7.2
Sleep Mode
8.4.8
Status Reporting
8.4.9
Switch Functionality and INTB Reporting
8.5
Programming
8.5.1
SPI Programming
8.6
Register Maps
8.6.1
Individual Register Listings
8.6.2
Register RP_SET (address = 0x01) [reset = 0x07]
8.6.3
Register TC1 (address = 0x02) [reset = 0x90]
8.6.4
Register TC2 (address = 0x03) [reset = 0xA0]
8.6.5
Register DIG_CONF (address = 0x04) [reset = 0x03]
8.6.6
Register ALT_CONFIG (address = 0x05) [reset = 0x00]
8.6.7
Register RP_THRESH_HI_LSB (address = 0x06) [reset = 0x00]
8.6.8
Register RP_THRESH_HI_MSB (address = 0x07) [reset = 0x00]
8.6.9
Register RP_THRESH_LO_LSB (address = 0x08) [reset = 0x00]
8.6.10
Register RP_THRESH_LO_MSB (address = 0x09) [reset = 0x00]
8.6.11
Register INTB_MODE (address = 0x0A) [reset = 0x00]
8.6.12
9.Register START_CONFIG (address = 0x0B) [reset = 0x01]
8.6.13
Register D_CONFIG (address = 0x0C) [reset = 0x00]
8.6.14
Register L_THRESH_HI_LSB (address = 0x16) [reset = 0x00]
8.6.15
Register L_THRESH_HI_MSB (address = 0x17) [reset = 0x00]
8.6.16
Register L_THRESH_LO_LSB (address = 0x18) [reset = 0x00]
8.6.17
Register L_THRESH_LO_MSB (address = 0x19) [reset = 0x00]
8.6.18
Register STATUS (address = 0x020 [reset = 0x00]
8.6.19
Register RP_DATA_LSB (address = 0x21) [reset = 0x00]
8.6.20
Register RP_DATA_MSB (address = 0x22) [reset = 0x00]
8.6.21
Register L_DATA_LSB (address = 0x23) [reset = 0x00]
8.6.22
Register L_DATA_MSB (address = 0x24) [reset = 0x00]
8.6.23
Register LHR_RCOUNT_LSB (address = 0x30) [reset = 0x00]
8.6.24
Register LHR_RCOUNT_MSB (address = 0x31) [reset = 0x00]
8.6.25
Register LHR_OFFSET_LSB (address = 0x32) [reset = 0x00]
8.6.26
Register LHR_OFFSET_MSB (address = 0x33) [reset = 0x00]
8.6.27
Register LHR_CONFIG (address = 0x34) [reset = 0x00]
8.6.28
Register LHR_DATA_LSB (address = 0x38) [reset = 0x00]
8.6.29
Register LHR_DATA_MID (address = 0x39) [reset = 0x00]
8.6.30
Register LHR_DATA_MSB (address = 0x3A) [reset = 0x00]
8.6.31
Register LHR_STATUS (address = 0x3B) [reset = 0x00]
8.6.32
Register RID (address = 0x3E) [reset = 0x02]
8.6.33
Register DEVICE_ID (address = 0x3F) [reset = 0xD4]
9
Application and Implementation
9.1
Application Information
9.1.1
TI Designs and Application Notes
9.1.2
Theory of Operation
9.1.3
RP+L Mode Calculations
9.1.4
LDC1101 RP Configuration
9.1.5
Setting Internal Time Constant 1
9.1.6
Setting Internal Time Constant 2
9.1.7
MIN_FREQ and Watchdog Configuration
9.1.8
RP+L Sample Rate Configuration With RESP_TIME
9.1.9
High Resolution Inductance Calculation (LHR mode)
9.1.10
LHR Sample Rate Configuration With RCOUNT
9.1.11
Setting RPMIN for LHR Measurements
9.1.12
Sensor Input Divider
9.1.13
Reference Clock Input
9.1.14
INTB Reporting on SDO
9.1.15
DRDY (Data Ready) Reporting on SDO
9.1.16
Comparator Functionality
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Device Configuration for RP+L Measurement with an Example Sensor
9.2.2.2
Device Configuration for LHR Measurement with an Example Sensor
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.1.1
Ground and Power Planes
11.1.2
CLKIN Routing
11.1.3
Capacitor Placement
11.1.4
Sensor Connections
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
Development Support
12.2
Documentation Support
12.2.1
Related Documentation
12.3
Community Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
DRC|10
MPDS117L
Thermal pad, mechanical data (Package|Pins)
DRC|10
QFND013N
Orderable Information
snosd01d_oa
snosd01d_pm