MTCH112_12 Datasheet, PDF (1/48 Pages) Microchip Technology – Dual-Channel Proximity/Touch Controller

MTCH112
Dual-Channel Proximity/Touch Controller
Features:
• Capacitive Proximity Detection System:
- High Signal to Noise Ratio (SNR)
- Adjustable sensitivity
- Noise Rejection Filters
- Scanning method actively optimized to
attenuate strongest noise frequencies
- Automatic calibration with optional user
presets
- Dynamic threshold management adjusts
sensitivity of sensor based on the level of
environmental noise
- Constant press calibration tracks the
expected offset when the sensor is pressed
and adjusts the threshold to automatically
achieve the best press/release behavior
- User-defined “minimum shift” values specify
the lowest amount of signal change to
activate a state transition. Automatic
thresholds never decrease below these
settings.
- Automatic Environmental Compensation
- Stuck release mechanism
• No Required External Components
• Low-Power mode: Highly Configurable
Low-Power mode
- 1 ms to 4s Sleep interval between sensor
samples
• Response Time as Low as 10 ms
• Hardware Error Detection notifies if either sensor
is shorted to VDD, VSS or the other sensor
• Operating Voltage Range:
- 1.8V to 3.3V
• Operating Temperature:
- 40°C to +85°C
Package Type
The device is available in 8-lead SOIC and DFN
packaging (see Figure 1).
FIGURE 1:
SOIC, DFN
8-PIN DIAGRAM
FOR MTCH112
VDD 1
MTO/INT ²
MTI0 3
RESET 4
8 VSS
7 ^MTI1/MTGRD0
6 SCL
5 SDA
TABLE 1:
8-PIN SOIC/DFN PINOUT
DESCRIPTION
I/O
8-Pin
SOIC/DFN
Description
VDD
MTO/INT
1
Power Supply Input
2
Detect Output (Active-Low)
Notification Interrupt Pin
MTI0
3
Proximity/Touch Sensor Input
RESET
SDA
SCL
4
Device Reset (Active-Low)
5
I²C™ Data
6
I²C™ Clock
MTI1/MTGRD0
7
Proximity/Touch Sensor Input
Active Guard Shield for MTI0
VSS
8
Ground Reference
 2012 Microchip Technology Inc.
Preliminary
DS41668A-page 1