The MS8891A is designed to deliver high immunity to crosstalk between sensor channels with an equal ratio of sensor inputs to outputs. Bare die form factor offers smallest size + highest integration.
Features:
- Watch demonstration video here!
- One or two channel operation
- Meter mode or switch mode
- Capacitance meter with 4 measuring ranges covering 0 to 1.6pF with a resolution of 8 bits
- Individually programmable threshold capacitance for both sensor channels in switch mode
- Programmable measuring interval in switch mode (single trigger, 2 measurements/s, 32 measurements/s, permanent)
- Programmable noise filter in switch mode
- Comparator outputs available at pins OUT1(sensor CS1) and OUT2 (sensor CS2) in switch mode
- Polarity of comparator outputs selectable by pin POL
- CMOS or open-drain output drivers
- I2C serial interface available at pins SDA and SCL
- No external components needed
- Sensors capacitance can be realized with conductive tracks on PCB or casing
- Idle current typ. 50nA
- Active current during measurement typ. 11µA
- Average current for 2 measurements/s in switch mode typ. 725nA (1 channel, no noise filter)
- Die form for smallest form factor with highest integration
Applications:
- Human body detection (e.g. in-ear phone, finger detection)
- Wrist detection e.g. wearables
- Fluid detection e.g. coffee machine
- Close proximity sensing
- Touch switch
Vendor:
Microdul
Electrical Datasheet
Die Physical Data:
Footprint: 1.555mm² (2410.722mil²)
Request Pad Layout
Microdul
Electrical Datasheet
Die Physical Data:
Footprint: 1.555mm² (2410.722mil²)
Request Pad Layout
Product Families: Used for this device are tabulated below.
Functional:
- Channels: 2
- Config: Switch/Meter
- Res: 8Bits
- Interface: I2C
- O/P Level: CMOS/Open-Drain
Specification:
VS: 1.8-4.5V
ISB: 50nA
IS(ACTIVE): 725nA
Range:Res1: 0-400:1.6fF
Range:Res 2: 400-800:1.6fF
Range:Res 3: 800-1200:1.6fF
Range:Res 4: 1200-1600:1.6fF
ISB: 50nA
IS(ACTIVE): 725nA
Range:Res1: 0-400:1.6fF
Range:Res 2: 400-800:1.6fF
Range:Res 3: 800-1200:1.6fF
Range:Res 4: 1200-1600:1.6fF
Other Detail: Important information for this device is tabulated below.
Traffic light setting for Minimum Order Quantity indicates the following:
- Green:Available from stock or at low factory MOQ.
- Amber: Available on factory order with MOQ.
- Red: High factory MOQ may apply, please ask for details.
Traffic light setting for High Reliability indicates the following:
- Green: This bare die is specified and tested for use in high reliability applications.
- Amber: This bare die can meet higher reliability specifications with additional testing & qualification, please ask for details.
- Red: This bare die is not specified or specifically designed for use in high reliability applications.
Traffic light setting for Space Grade indicates the following:
- Green: This bare die is qualified for space applications or has space level qualification data, please ask for details.
- Amber: This bare die can be specified for space applications with additional testing and qualification, please ask for details.
- Red: Suitability of this bare die for space applications is unknown and requires further qualification, please ask for details.
