Ams As8579 Adapter Board User Guide (+ PDF)

Contents hide

1 ams AS8579 Adapter Board

6 Revision Information

7 Legal Information

8 Documents / Resources

8.1 References

9 Related Posts

ams AS8579 Adapter Board

Introduction

This manual explains how to use the AS8579-SS_EK_AB hardware. The Hardware is designed to test and evaluate the features of AS8579 capacitive sensor. The AS8579 is a sensor, which measures the capacitive value by separately measuring the 10-bit Information (accumulated to 14-bit) of I and Q. This 14-bit information provides the capacitance of the application. The I and Q data can be read over a standard SPI interface.
For first setting up, please see application note: AS8579_SPI_Configuration_AN001003_1-00.

Kit Content

Figure 1:
AS8579 Adapter Board Kit Content

Ordering Information

Ordering Code	Description
AS8579-SS_EK_AB	AS8579 Adapter Board

Board Description

The PCB can be connected via standard SPI to a microcontroller. The Production Programmer from SD4Y and the ams I&P-Box are also recommended tools for communication/programming interface.
If you want to connect the I&P box to the Adapter Board, a level shifter is needed (the I&P Box works with 3.3 V voltage levels).
The PCB is equipped with all necessary peripheral components for easy evaluation.

Figure 2:
AS8579 Adapter Board

Figure 3: BOM

Symbol	Description
U1	Capacitive sensor AS8579
C1	Capacitor 100 nF
C2	Capacitor 1 µF
X1	Oscillator 48 MHz

Detailed Description
Figure 4:
AS8579 Adapter Board Overview Figure 5: Description

Components	Description
Supply	Pin 5 V supply and ground
SPI Pins	Communication and Programming Interface
SEN Lines	Sensing interface
VAR/ FIX SEN	Pins for cable and PCB shielding
Oscillator	Oscillator for clock generation of system clock frequency input Settings: EDIV=0000b (default value) -> CLK_E divider is 12 and resulting system clock is 4 Mz
AS8579	Capacitive sensor
Bypass Caps	Recommended decoupling capacitors

Pinout
Figure 6:
AS8579 Adapter Board Pinout

Figure 7: Pinout

Pin #	Symbol	Description
P1-1	SEN0
P1-2	SEN1
P1-3	SEN2
P1-4	SEN3
Sensing Lines (0-7)
P1-5	SEN4
P1-6	SEN5
P1-7	SEN6
P1-8	SEN7
P1-9	5V	5 V supply
P1-10	GND	Ground
P1-11	CSn	SPI – Chip select
P1-12	MOSI	SPI – Master out slave in
P1-13	CLK	SPI – Clock
P1-14	MISO	SPI – Master in slave out
P1-15	SEN9
Sensing Lines (8-9)
P1-16	SEN8
P2-1	FIX_SEN	PCB shielding driver
P2-2	VAR_SEN	Cable shielding driver

Hardware

Schematic

Figure 8: Schematic

Layout

Figure 9: PCB Layout

Revision Information

Changes from previous version to current revision v1-00	Page
Initial production version	all

Page and figure numbers for the previous version may differ from page and figure numbers in the current revision.
Correction of typographical errors is not explicitly mentioned.

Legal Information

Copyrights & Disclaimer
Copyright ams AG, Tobelbader Strasse 30, 8141 Premstaetten, Austria-Europe. Trademarks Registered. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.

Demo Kits, Evaluation Kits and Reference Designs are provided to recipient on an “as is” basis for demonstration and evaluation purposes only and are not considered to be finished end-products intended and fit for general consumer use, commercial applications and applications with special requirements such as but not limited to medical equipment or automotive applications. Demo Kits, Evaluation Kits and Reference Designs have not been tested for compliance with electromagnetic compatibility (EMC) standards and directives, unless otherwise specified. Demo Kits, Evaluation Kits and Reference Designs shall be used by qualified personnel only.

ams AG reserves the right to change functionality and price of Demo Kits, Evaluation Kits and Reference Designs at any time and without notice.
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ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services.

RoHS Compliant & ams Green Statement
RoHS Compliant: The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories plus additional 4 substance categories (per amendment EU 2015/863), including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes.

ams Green (RoHS compliant and no Sb/Br/Cl): ams Green defines that in addition to RoHS compliance, our products are free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) and do not contain Chlorine (Cl not exceed 0.1% by weight in homogeneous material).

Important Information: The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.

ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.