AS8579-ASST datasheet(4/44 Pages) OSRAM

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AS8579

General Description

Datasheet

• PUBLIC

DS000707

• v4-01 • 2022-Jun-08

│ 3

General Description

The AS8579 is a capacitive sensor that detects the change of capacity in different applications. The

capacitive sensor measures the relative change of the impedance (RealCapSense, due to our

measurement principle), dependent on the circuit. This can be used for human being detection as well

as many other applications

The IC capture the current of a metal object and applies algorithms to determine the capacitive and

resistive information (Impedance). This information can be read via 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 up to ASIL B. The capacitive sensing IC is specifically

designed to work under high electromagnetic disturbances (EMC).

With this approach, the sensor can distinguish in a hands-on application if for example, a steering

wheel is touched or not.

The AS8579 is available in an SSOP24 package and operates at a supply voltage of 5 V.

1.1

Key Benefits & Features

The benefits and features of AS8579, Capacitive Sensor, are listed below:

Figure 1:

Added Value of Using AS8579

Benefits

Features

Accurate capacitive measurement(including

resistive information)

I/Q-signal demodulation

Higher durability and lower system costs

VAR_SEN & FIX_SEN function to avoid parasitic

influences from cable and PCB

Enabler for safety critical applications

Processed according functional safety standard

Suitable for automotive applications

AEC-Q100 Grade 1 qualified

AS8579-ASST Folha de dados(PDF) 4 Page - OSRAM GmbH