1 Features
1• Wide Operating Voltage Range: 1.8 V to 3.3 V
• Sensor Frequency Range: 500 kHz to 10 MHz
• RP Resolution: 16-Bit
• L Resolution: 16- or 24-Bit
• 180-kSPS Conversion Rate
• Threshold Detection Functionality
• 1% Part-to-Part Variation in RP Measurement
• Supply Current:
– 1.4-μA Shutdown mode
– 135-μA Sleep mode
– 1.9-mA Active Mode (no sensor connected)
• Sub-Micron Distance Resolution Achievable
• Remote Sensor Placement Isolating the LDC from
Harsh Environments
• Robust Against Environmental Interferences such
as Oil, Water, Dirt, or Dust
• Minimal External Components
• Magnet-Free Operation
• Operating Temperature: –40°C to +125°C

2 Applications
• High-Speed Gear Counting
• High-Speed Event Counting
• Motor Speed Sensing
• Knobs and Dials for Appliances, Automotive, and
Consumer Applications
• HMI for Appliances, Automotive, and Consumer
Applications
• Buttons and Keypads
• Motor Control
• Metal Detection

3 Description
The LDC1101 is a 1.8-V to 3.3-V, high-resolution
inductance-to-digital converter for short-range, highspeed,
contactless sensing of position, rotation, or
motion, enabling reliable, accurate measurements
even in the presence of dust or dirt, making it ideal
for open or harsh environments.
The LDC1101 features dual inductive measurement
cores, allowing for > 150 ksps 16-bit RP and L
measurements simultaneous with a high-resolution L
measurement which can sample at > 180 ksps with a
resolution of up to 24 bits. The LDC1101 includes a
threshold-compare function which can be dynamically
updated while the device is running.
Inductive sensing technology enables precise
measurement of linear/angular position,
displacement, motion, compression, vibration, metal
composition, and many other applications in markets
including automotive, consumer, computer, industrial,
medical, and communications. Inductive sensing
offers better performance and reliability at lower cost
than other, competing solutions.
The LDC1101 offers these benefits of inductive
sensing in a small 3-mm × 3-mm 10-pin VSON
package. The LDC1101 can be easily configured by a
microcontroller using the 4-pin SPI™.