LDC1041 Converter Datasheet

LDC1041 Datasheet, PDF, Equivalent


Part Number

LDC1041

Description

Inductance to Digital Converter

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download LDC1041 Datasheet


LDC1041
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Buy
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LDC1041
SNOSCY1 – MARCH 2014
LDC1041: 8-bit Rp, 24-bit L Inductance-to-Digital Converter with SPI
1 Features
1 Remote sensor placement (decoupling the LDC
from harsh environments)
• High durability (by virtue of contactless operation)
• Higher flexibility for system design (using coils or
springs as sensors)
• Insensitive to non-conductive environmental
interferers (such as dirt, dust, oil etc.)
• Magnet-free operation
• Sub-micron precision
• Supply Voltage: 5 V, typ
• Supply voltage, IO: 1.8V to 5.5V
• Stand-by current: 250uA, typ
• Rp resolution: 8-bit
• L resolution: 24-bit
• LC frequency range: 5kHz to 5MHz
2 Applications
• Level sensing
• Proximity sensing
• Spring motion sensing
• Lateral and angular position sensing
• Metal composition detection
3 Description
Inductive sensing is a contactless, short-range
sensing technology enabling high-resolution and low-
cost position sensing of conductive targets, even in
harsh environments. Using a coil or spring as a
sensor, the LDC1041 inductance-to-digital converter
provides system designers a way to achieve high
performance and reliability at a lower system cost
than other competing solutions.
The LDC1041 is pin compatible with the LDC1000
(16-bit Rp/24-bit L) and the LDC1051 (8-bit Rp). This
family of devices offers system designers different
resolution options based on their application and
system requirements.
The LDC1041 is available in a 5mm x 4mm WSON-
16 package. Device programming via SPI allows for
easy configuration using a microcontroller.
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
LDC1041NHRT
WSON (16)
5 mm × 4 mm
LDC1041NHRR
WSON (16)
5 mm × 4 mm
LDC1041NHRJ
WSON (16)
5 mm × 4 mm
Axial Distance Sensing Application
Application Schematic
5V
LDO
VIO
5V
VIO
DGND
MOSI
MISO
MCU
SCLK
GPIO
INT/GPIO
Timer/Aux CLK
VIO VDD
SDI
SDO
SCLK
CSB LDC1041
INTB
TBCLK
INA
INB
CFA
CFB
DGND CLDO
GND
DAP
Sensor
DGND
DGND
AGND
Rp vs Distance With 14mm PCB Coil
14
12
10
8
6
4
2
0
01234567
Distance (mm)
8
C002
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

LDC1041
LDC1041
SNOSCY1 – MARCH 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Terminal Configuration and Functions................ 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 Handling Ratings....................................................... 4
6.3 Recommended Operating Conditions(1) ................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Timing Requirements ................................................ 6
6.7 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 8
7.1 Overview ................................................................... 8
7.2 Functional Block Diagram ......................................... 8
7.3 Feature Description................................................... 8
7.4 Device Functional Modes........................................ 12
7.5 Programming........................................................... 15
7.6 Register Map and Description................................. 16
8 Applications and Implementation ...................... 21
8.1 Application Information............................................ 21
8.2 Typical Applications ................................................ 22
9 Power Supply Recommendations...................... 26
10 Layout................................................................... 26
10.1 Layout Guidelines ................................................. 26
10.2 Layout Example .................................................... 27
11 Device and Documentation Support ................. 28
11.1 Trademarks ........................................................... 28
11.2 Electrostatic Discharge Caution ............................ 28
11.3 Glossary ................................................................ 28
12 Mechanical, Packaging, and Orderable
Information ........................................................... 29
4 Revision History
DATE
March 2014
REVISION
*
NOTES
Initial release.
2 Submit Documentation Feedback
Product Folder Links: LDC1041
Copyright © 2014, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LDC1041 SNOSCY1 – MARCH 20 14 LDC1041: 8-bit Rp, 24-bit L Inductan ce-to-Digital Converter with SPI 1 Fea tures •1 Remote sensor placement (dec oupling the LDC from harsh environments ) • High durability (by virtue of con tactless operation) • Higher flexibil ity for system design (using coils or s prings as sensors) • Insensitive to n on-conductive environmental interferers (such as dirt, dust, oil etc.) • Mag net-free operation • Sub-micron preci sion • Supply Voltage: 5 V, typ • S upply voltage, IO: 1.8V to 5.5V • Sta nd-by current: 250uA, typ • Rp resolu tion: 8-bit • L resolution: 24-bit LC frequency range: 5kHz to 5MHz 2 Ap plications • Level sensing • Proxim ity sensing • Spring motion sensing Lateral and angular position sensing • Metal composition detection 3 Desc ription Inductive sensing is a contactl ess, short-range sensing technology enabling high-resolution and lowcost position sensing of conduc.
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