ams AS8579 Capacitive Sensor

Longevity January 2031
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Longevity January 2031
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Description

The AS8579 is a capacitive sensor that detects the change of capacity in different applications. The capacitive sensor measures the impedance that originates between a conducting surface (metallic object) and a human being. The IC captures the current of a metal object and applies algorithms to determine the capacitive and resistive information. The outcome information can be read through a SPI Interface that can be also used for IC configuration. This high precision performance sensor also supports a multitude of diagnostic features that meet standard functional safety requirements. The capacitive sensing IC is specifically designed to function in an electro-magnetic environment (EMC) with high magnetic disturbances. This allows the sensor to distinguish in a hands-on application if the driver‘s hand is on the steering wheel or not. The AS8579 is available in an SSOP24 package and operates at a supply voltage of 5V.

Details

Features

  • I/Q-Signal demodulation
  • Up to 10 independent measurement lines possible (10 SEN lines)
  • VAR&FIX_SEN function to avoid parasitic influences from cable and PCB
  • Designed according functional safety standard
  • AEC-Q100 Grade 1 qualified

Benefits

  • Accurate capacitive measurement (seperation of resistive and capacitive information)
  • Higher durability and lower system costs
  • Enabler for safety critical applications
  • Suitable for automotive applications

Parameters

System sensitivity
80 fF/LSB
Output resolution
14 Bit (accumulated)
Sensing channels
10
Supply voltage
5 V
Package
SSOP24
Automotive qualified
AEC-Q100
Shielding possibility
for cable and PCB
Operating ambient temperature
min.
-40 °C
max.
125 °C
Diagnostic
Error monitoring
Function
human presence detection
fluid level / quality sensing
Package dimension
l
8.2 mm
w
1.86 mm
h
7.8 mm

Ordering codes

Downloads