AS1716-ASOT

AS1716-ASOT Datasheet

AS1716

Part	Datasheet
AS1716-ASOT	AS1716-ASOT (pdf)

Related Parts	Information
AS1716A-ASOT	AS1716A-ASOT

PDF Datasheet Preview
Datasheet AS1716 Capacitive Sensor Interface 1 General Description AS1716 is an analog front end specifically designed for unbiased Capacitive Sensors, as for instance Knock Sensors in Automotive, to be interfaced with Analog Digital Converters with Sample and Hold input stages. The device provides differential inputs, a 1st order low pass filter to cutoff the high frequency noise components, differential to single ended conversion, programmable gain stage and a 2 pole low pass Multiple Feedback Filter. The Knock Sensor is a Piezo Electric device that generates a voltage if it is stressed. It senses knock and transmits information to the electronic engine management control unit. This influences process control in the engine, for example timing and fuel injection until knock is eliminated. The capacitive sensor is biased via resistors to a voltage level of VDDA/2. 2 Key Features Differential input stage with wide input range Resistive sensor biasing VDDA/2 Programmable Gain x0.5, x1, x2, x4 Internal 2nd order low pass Multiple Feedback Filter with a min. cut off frequency of 16kHz Single supply operation 4.5V to 5.5V Operating Temperature range -40°C to +125°C High CMRR 55dB min EMC characterized by IEC 61967-4 1Ω / 150Ω Method EMC characterized by IEC 62132-4 Direct Power Injection Automotive qualified to AECQ100 for IC and PPAP level 3 8-pin SOIC Package Figure AS1716 - Block Diagram 3 Applications Analog front end for Capacitive Sensors to Analog to Digital Converters and DSP. VDDA VSSA NC INN VDDA + VDDA/2 VDDA/2 AS1716 VDDA/2 Gain Control x0.5, x1, x2, x4 + + VDDA/2 Multiple Feedback LP Filter fc ~23kHz typ. VDDA/2 GA GB 1 - 12 AS1716 Datasheet - Pinout 4 Pinout Pin Assignment Figure Pin Assignments Top View VDDA 1 GA 2 GB 3 INP 4 AS1716 8 OUT 7 VSSA 6 NC 5 INN Pin Description Table Pin Description Pin Name VDDA GA GB INP INN NC VSSA OUT Pin Number 1 2 3 4 5 6 7 8 Description Positive Supply Gain selection. Internal pull-down of 100kΩ Gain selection. Internal pull-down of 100kΩ Non-Inverting Input Inverting Input Not Connected. Must be left unconnected in the application Negative Supply Signal Output 2 - 12 AS1716 Datasheet - Absolute Maximum Ratings Datasheet - Ordering Information 11 Ordering Information The device is available as the standard product shown in Table Table Ordering Information Ordering Code AS1716-ASOT Marking AS1716 Description Capacitive Sensor Interface, 16kHz Delivery Form Tape and Reel Note All products are RoHS compliant. Buy our products or get free samples online at ICdirect: For further information and requests, please contact us or find your local distributor at Package 8-pin SOIC 11 - 12 AS1716 Datasheet Copyrights Copyright 1997-2011, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, 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. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems 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 austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 12 - 12

PDF Datasheet Preview

Datasheet

AS1716

Capacitive Sensor Interface
1 General Description

AS1716 is an analog front end specifically designed for unbiased Capacitive Sensors, as for instance Knock Sensors in Automotive, to be interfaced with Analog Digital Converters with Sample and Hold input stages.

The device provides differential inputs, a 1st order low pass filter to cutoff the high frequency noise components, differential to single ended conversion, programmable gain stage and a 2 pole low pass Multiple Feedback Filter.

The Knock Sensor is a Piezo Electric device that generates a voltage if it is stressed. It senses knock and transmits information to the electronic engine management control unit. This influences process control in the engine, for example timing and fuel injection until knock is eliminated.

The capacitive sensor is biased via resistors to a voltage level of VDDA/2.
2 Key Features

Differential input stage with wide input range Resistive sensor biasing VDDA/2 Programmable Gain x0.5, x1, x2, x4 Internal 2nd order low pass Multiple Feedback Filter with a min. cut off frequency of 16kHz Single supply operation 4.5V to 5.5V Operating Temperature range -40°C to +125°C High CMRR 55dB min EMC characterized by IEC 61967-4 1Ω / 150Ω Method EMC characterized by IEC 62132-4 Direct Power Injection Automotive qualified to AECQ100 for IC and PPAP level 3 8-pin SOIC Package

Figure AS1716 - Block Diagram
3 Applications

Analog front end for Capacitive Sensors to Analog to Digital Converters and DSP.

VDDA VSSA NC

INN VDDA
+ VDDA/2

VDDA/2

AS1716

VDDA/2

Gain Control
x0.5, x1, x2, x4 +
+ VDDA/2 Multiple Feedback LP Filter fc ~23kHz typ.

VDDA/2

GA GB
1 - 12

AS1716

Datasheet - Pinout
4 Pinout

Pin Assignment

Figure Pin Assignments Top View

VDDA 1 GA 2 GB 3 INP 4

AS1716
8 OUT 7 VSSA 6 NC 5 INN

Pin Description

Table Pin Description

Pin Name VDDA GA GB INP INN NC VSSA OUT

Pin Number 1 2 3 4 5 6 7 8

Description Positive Supply Gain selection. Internal pull-down of 100kΩ Gain selection. Internal pull-down of 100kΩ Non-Inverting Input Inverting Input Not Connected. Must be left unconnected in the application Negative Supply Signal Output
2 - 12

AS1716

Datasheet - Absolute Maximum Ratings
Datasheet - Ordering Information
11 Ordering Information

The device is available as the standard product shown in Table
Table Ordering Information
Ordering Code AS1716-ASOT

Marking AS1716

Description Capacitive Sensor Interface, 16kHz

Delivery Form Tape and Reel

Note All products are RoHS compliant. Buy our products or get free samples online at ICdirect:

For further information and requests, please contact us or find your local distributor at

Package 8-pin SOIC
11 - 12

AS1716

Datasheet

Copyrights

Copyright 1997-2011, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, 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. All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Disclaimer

Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems 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 austriamicrosystems AG rendering of technical or other services.

Contact Information

Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
12 - 12

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Datasheet ID: AS1716-ASOT 519655