Inductive Sensing 32-Position Encoder Knob Reference Design using the LDC1312/LDC1314
TIDA-00615
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Key Document
Description
An inductive sensing based incremental encoder knob design can provide a robust and low-cost interface for control inputs. It can reliably operate in environments which have dirt, moisture, or oil which would pose issues for alternate sensing technologies. This solution requires no magnets.
Features
- High reliability, contactless, encoder implementation suitable for dirty, wet, and other challenging environments
- Scalable to support multiples of 4 positions/rotation
- Minimum MCU requirements
- No permanent magnets required; operates effectively even with magnetic or electrical environmental interference
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Schematic/Block Diagram
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Test Data
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TI Devices (6)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| CD74HC4511 |
High Speed CMOS Logic BCD-to-7 Segment Latch/Decoder/Driver |
Specialty logic ICs |
Sample & Buy |
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| LDC1312 |
2-Ch, 12-bit, general purpose inductance to digital converter |
Specialty sensors |
Sample & Buy |
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| LDC1314 |
4-Ch, 12-bit, general purpose inductance to digital converter |
Specialty sensors |
Sample & Buy |
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| LP5951 |
150-mA, low-IQ, low-dropout voltage regulator with enable |
Power management |
Sample & Buy |
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| MSP430F5528 |
25 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier |
Microcontrollers (MCUs) |
Sample & Buy |
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| TPD2E001 |
Dual 1.5-pF, 5.5-V, ±8-kV ESD protection diode with 1-nA max leakage & VCC pin for USB 2.0 |
Circuit protection ICs |
Sample & Buy |
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CAD/CAE symbols
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Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1: Download and install the free download.
Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
Step 3: Open the .bxl file with the Ultra Librarian software.
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Technical documentation
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User guide (1)
| Title | Type | Size (KB) | Date |
| | PDF | 3508 |
28 Jan 2016
|
Design files (6)
| | ZIP | 3208 |
01 Mar 2016
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| | ZIP | 867 |
01 Mar 2016
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| | PDF | 1406 |
01 Mar 2016
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| | PDF | 175 |
01 Mar 2016
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| | PDF | 214 |
01 Mar 2016
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| | PDF | 624 |
01 Mar 2016
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More literature (1)
| Title | Type | Size (KB) | Date |
| | ZIP | 4354 |
02 Mar 2016
|
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