LDC1312-Q1 Datasheet, PDF (1/56 Pages) Texas Instruments – Multi-Channel 12-Bit Inductance to Digital Converter (LDC)

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LDC1312-Q1, LDC1314-Q1
SNOSCZ6 – APRIL 2016
LDC1312-Q1, LDC1314-Q1 Multi-Channel 12-Bit Inductance to Digital Converter (LDC) for
Inductive Sensing
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1:–40°C to +125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C5
• Easy-to-use – Minimal Configuration Required
• Measure up to 4 Sensors with One IC
• Multiple Channels Support Environmental and
Aging Compensation
• Multi-Channel Remote Sensing Provides Lowest
System Cost
• Pin-Compatible Medium and High-resolution
Options
– LDC1312-Q1/LDC1314-Q1: 2/4-ch 12-bit LDC
– LDC1612-Q1/LDC1614-Q1: 2/4-ch 28-bit LDC
• Supports Wide Sensor Frequency Range of 1kHz
to 10MHz
• Power Consumption:
– 35 µA Low Power Sleep Mode
– 200 nA Shutdown Mode
• 3.3V Operation
• Support Internal or External Reference Clock
• Immune to DC Magnetic Fields and Magnets
2 Applications
• Automotive Buttons and Knobs
• Linear and Rotational Encoders
• Slider Buttons
• Metal Detection in Industrial and Automotive
• Flow Meters
3 Description
The LDC1312-Q1 and LDC1314-Q1 are 2- and 4-
channel, 12-bit inductance to digital converters
(LDCs) for inductive sensing solutions. With multiple
channels and support for remote sensing, the
LDC1312-Q1 and LDC1314-Q1 enable the
performance and reliability benefits of inductive
sensing to be realized at minimal cost and power.
The products are easy to use, only requiring that the
sensor frequency be within 1 kHz and 10 MHz to
begin sensing. The wide 1 kHz to 10 MHz sensor
frequency range also enables use of very small PCB
coils, further reducing sensing solution cost and size.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LDC1312-Q1
WSON (12)
4.00 mm × 4.00 mm
LDC1314-Q1
WQFN (16)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
40 MHz
CLKIN
Target
Sensor 0
IN0A
IN0B
Target
Sensor 1
IN1A
IN1B
GND
LDC1312
3.3 V
VDD
SD
INTB
3.3 V
GPIO
GPIO
MCU
VDD
Core
SDA
I²C
SCL
ADDR
3.3 V
I²C
Peripheral
GND
Copyright © 2016, Texas Instruments Incorporated
Measurement Precision vs. Target Distance
2.5
2.25
2
1.75
1.5
1.25
1
0.75
0.5
0.25
0
0
10% 20% 30% 40% 50% 60% 70%
Sensing Range (Target Distance / ‡_SENSOR)
D001
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.