LDC1051_15 Datasheet, PDF (1/33 Pages) Texas Instruments – LDC1051: 8-bit Rp only Inductance-to-Digital Converter with SPI

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LDC1051
SNOSCY0 – MARCH 2014
LDC1051: 8-bit Rp only 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
• Supply Voltage: 5 V, typ
• Supply Voltage, IO: 1.8V to 5.5V
• Stand-by Current: 250uA, typ
• Rp Resolution: 8-bit
• LC Frequency Range: 5kHz to 5MHz
Axial Distance Sensing Application
Application Schematic
2 Applications
5V
VIO
5V
LDO
• Proximity Sensing
• Level Sensing
VIO
MOSI
VIO
VDD
SDI
INA
• Lateral Position Sensing
MCU
MISO
SCLK
GPIO
SDO
SCLK
INB
CSB ^LDC1051
Sensor
3 Description
INT/GPIO
INTB
CFA
CFB
Inductive sensing is a contactless, short-range
DGND
GND
sensing technology enabling high-resolution and low-
DGND _CLDO
DAP
cost position sensing of conductive targets, even in
DGND
harsh environments. Using a coil or spring as a
sensor, the LDC1051 inductance-to-digital converter
DGND
AGND
provides system designers a way to achieve high
performance and reliability at a lower system cost
than other competing solutions.
Rp vs Distance With 14mm PCB Coil
14
The LDC1051 is pin compatible with the LDC1000
12
(16-bit Rp/24-bit L) and the LDC1041 (8-bit Rp/24-bit
10
L). This family of devices offers system designers
different resolution options based on their application
8
and system requirements.
6
The LDC1051 is available in a 5mm x 4mm WSON-
16 package. Device programming via SPI allows for
4
easy configuration using a microcontroller.
2
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
LDC1051NHRT
WSON (16)
5 mm × 4 mm
LDC1051NHRR
WSON (16)
5 mm × 4 mm
LDC1051NHRJ
WSON (16)
5 mm × 4 mm
0
0
1
2
3
4
5
6
7
8
Distance (mm)
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.