Texas Instruments LDC2112/LDC2114电感式传感器

Texas Instruments LDC2112/LDC2114 电感式触摸按钮包括能够实现触摸按钮设计的电感式传感技术。这可以通过测量导电靶的小偏差在各种各样的材料（如金属、玻璃、塑料和木材）上进行。这种电感式触摸系统的传感器是可以在位于面板后面并且免受环境影响的小型紧凑 PCB 上实现的线圈。LDC2112/LDC2114 能够可靠地检测小于 200nm 的材料偏差。LDC2112/LDC2114 是一款多通道低噪声电感数字转换器，通过集成算法实现电感式触摸应用。该器件采用创新的 LC 谐振器，可以很好地抑制噪声和干扰。LDC2112/LDC2114包含一个超低功耗模式，适用于电池供电应用中的电源开/关按钮。

特性

Low power consumption
- One button: 6µA at 0.625SPS
- Two buttons: 85µA at 20SPS
Configurable button scan rates
- 0.625SPS to 80SPS
Force level measurement of touch buttons
Independent channel operation
- Two channels for LDC2112
- Four channels for LDC2114
Integrated algorithms to enable
- Adjustable force threshold per button
- Environmental shift compensation
- Simultaneous button press detection

Supports independent operation without MCU
Robust EMI performance
- CISPR 22 Class B and CISPR 24 compliant
1.8V ± 5% supply voltage
–40°C to +85°C temperature range
Interface
- I²C
- Dedicated logic output per button

应用

Touch buttons and force level measurements on different materials, including metal, plastic, and glass for
- Consumer electronics
  - Smartphones
  - Smartwatches and other wearable devices
  - Smart speakers
  - Tablets/PCs
  - Virtual reality headsets
  - Soundbars
- Industrial applications
  - Televisions
  - Handheld devices
  - Home appliances
  - HMI panels and keypads