TI LDC1101DRCR

The LDC1101 is a 1.8V to 3.3V, high-resolution inductance-to-digital converter for short-range, high-speed, contactless sensing of position, rotation, or motion, enabling reliable and accurate measurements even in the presence of dirt or dust, making it ideal for outdoor or harsh environments. The LDC1101 features a dual inductive measurement core that performs >150 ksps 16-bit Rp and L measurements while simultaneously delivering high-resolution L measurements with up to 24-bit resolution at sample rates exceeding 180 ksps. The LDC1101 includes a threshold comparison function that can be dynamically updated while the device is operating. Inductive sensing technology enables high-precision measurement of linear/angular position, displacement, motion, compression, vibration, metal composition, and many other applications. It delivers superior performance and reliability at a lower cost than competing solutions. The LDC1101 provides these inductive sensing advantages in a compact 3mm×3mm 10-pin VSON package. A microcontroller can easily configure the LDC1101 using a 4-pin SPI interface.

• Wide supply voltage range: 1.8V to 3.3V
• Sensor frequency range: 500kHz to 10MHz
• Rp resolution: 16-bit
• L resolution: 16/24-bit
• 180kSPS conversion rate
• Threshold detection function
• Device-to-device deviation for Rp measurement: 1%
• Supply current:
  • Shutdown mode: 1.4μA
  • Sleep mode: 135μA
  • Active mode: 1.9mA (no sensor connected)
• Distance resolution down to sub-micron level
• Supports remote sensor placement to isolate LDC from harsh environments
• Resistant to water, oil, dirt, dust, and other environmental interference
• Minimal external components
• Magnet-free operation
• Operating temperature range: -40℃ to 125℃

• High-speed gear tooth counting
• High-speed event counting
• Motor speed sensing
• Knobs and dials in home appliance, automotive, and consumer applications
• HMI in home appliance, automotive, and consumer applications
• Buttons and keypads
• Motor control
• Metal detection