Capacitive Switches

The MS888X-series are ultra-low-power capacitive touch and proximity sensors. The devices below are dynamic switches using a single electrode. The finger approaches the electrode, touches or is close and then the finger leaves. The event is detected when the circuit leaves its equilibrium state due to a change in the capacitance close to the electrode. Slow changes of capacitance caused by manufacturing tolerances, dirt or water are compensated. They are suitable for battery applications where the event is dynamic.

 

Applications

  • Medical
  • Automotive
  • Buildings & Sanitary
  • Mobile application
  • Hermetical or vandal proof switches
  • Intrinsic safety

 

General Features

  • Dynamic proximity switch
  • Digital processing method
  • Automatic calibration
  • Open-drain output (P-type MOSFET, external load between pin and ground)
  • Low-power battery operation possible
  • Adjustable response time
  • Adjustable sensitivity
  • Output configurable as push-button, toggle or pulse
  • Large voltage operating range
  • Internal voltage regulator
  • Large operating temperature range (-40°C to 85°C)

 

Type specific properties

1- and 2-channel:

  • Configurable output
  • Large voltage operating range (VHI = 3 to 9V)


8-channel:

  • Keypad, matrix and slider applications up to 8x8 matrix (2 chips cascaded)
  • Unrivalled current consumption, typically 10uA
  • Fast-mode Plus (Fm+) I2C-Interface with interrupt generation
  • Sleep mode <100nA
     

Overview:

Type

1-channel

2-channel

8-channel

Description

MS8883A

MS8883C

MS8886C

MS8885B

Package

SOIC8

DFN8

QFN16

QFN28

Delivery form

Tape&Reel

Tape&Reel

Tape&Reel

Tape&Reel

Article Nr

916683

9160178

9160179

9160151

Data sheet

DB_MS8883A

DB_MS8883C

DB_MS8886C

DB_MS8885B

Eval.-board
Article Nr

916987

 

9160266

9160308

Eval.-board
User Guide

EB_MS8883A

 

EB_MS8886C

EB_MS8885B

Summary

 

SU_MS8883C

 

SU_MS8885B

Application note

AH_MS8883

 

Get an evaluation board to check out the capabilities of this great touch switch!