Datasheet > AS1716A-ASOT

AS1716A-ASOT

更新时间： 2024-01-25 19:47:31

品牌	Logo	应用领域
艾迈斯 - AMSCO		传感器
页数	文件大小	规格书
12页	413K
描述
Capacitive Sensor Interface

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技术参数
数据手册

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AS1716A-ASOT 技术参数

是否Rohs认证：	符合	生命周期：	Contact Manufacturer
Reach Compliance Code：	unknown	风险等级：	5.8
Base Number Matches：	1

AS1716A-ASOT 数据手册

Datasheet

AS1716

Capacitive Sensor Interface

1 General Description

2 Key Features

ꢀ

Differential input stage with wide input range

AS1716 is an analog front end specifically designed for

unbiased Capacitive Sensors, as for instance Knock

Sensors in Automotive, to be interfaced with Analog Dig-

ital Converters with Sample and Hold input stages.

Resistive sensor biasing (VDDA/2)

Programmable Gain (x0.5, x1, x2, x4)

Internal 2^ndorder low pass Multiple Feedback Filter

with a min. cut off frequency of 16kHz

The device provides differential inputs, a 1st order low

pass filter to cutoff the high frequency noise compo-

nents, differential to single ended conversion, program-

mable gain stage and a 2 pole low pass Multiple

ꢀ

Single supply operation: 4.5V to 5.5V

Operating Temperature range: -40°C to +125°C

High CMRR: 55dB (min)

Feedback Filter.

The Knock Sensor is a Piezo Electric device that gener-

ates a voltage if it is stressed. It senses knock and trans-

mits 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.

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

The capacitive sensor is biased via resistors to a voltage

level of VDDA/2.

8-pin SOIC Package

3 Applications

Analog front end for Capacitive Sensors to Analog to

Digital Converters and DSP.

Figure 1. AS1716 Block Diagram

VSSA

VDDA

INN

VDDA

VDDA/2

Gain Control

x0.5, x1, x2, x4

OUT

VDDA/2

Multiple Feedback LP Filter

fc ~23kHz typ.

INP

VDDA/2

AS1716

VDDA/2

www.austriamicrosystems.com

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