Datasheet > AS3931

AS3931

更新时间： 2022-12-20 06:20:30

品牌	Logo	应用领域
艾迈斯 - AMSCO		/
页数	文件大小	规格书
2页	60K
描述
3D Low Power Wake-up Receiver

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AS3931 数据手册

3D Low Power Wake-up Receiver

PRODUCT BRIEF

AS3931

4. Additional Features

1. General Description

Antenna rotation switch

AS3931 is an ultra low power, three channel LF ASK

receiver designed to operate in various applications

such as LF identification systems and LF tag receivers.

three independent LF receiver chains

Wake-up output combining the three receiver

chains

AS3931 is able to detect

a low frequency ASK-

Low power 32.768 kHz crystal oscillator circuit

Serial programming interface

Voltage regulator with 2.4 V output, on/off

switchable

modulated signal by looking for a digital wake-up pattern

and generates a WAKE signal after successful pattern

detection. The device incorporates an intelligent pattern

detection algorithm that provides reliable operation even

in presence of strong interferences. RSSI signals can be

generated at the RSSI pin for each receiver channel.

Each independent LF receiver chain contains:

Input overload protection

Input attenuator

Ultra low power LF amplifier with logarithmic

envelope output

2. Key Features

Robust data detector with adaptive slicing

threshold that translates the logarithmic

envelope into a digital data signal

Error tolerant digital pattern correlator that

detects a given code sequence in the received

data signal and generates a wake-up signal

Sophisticated power management logic that

powers down the correlator if no data is

received

3D wake-up pattern detection

3D LF field strength measurement

Antenna rotation for easy calibration

High sensitivity and high dynamic range

Wide operating frequency range

Reliable, interference resistant wake-up decoding

Highly protected differential inputs

Ultra low power consumption

3. Main characteristics

5. Applications

Wake-up sensitivity: 350 µVpp

LF identification systems

LF carrier frequency range: 19 – 150 kHz

Data rate: 2.731 kb/s

LF tag receivers

Three-dimensional LF field strength

measurement systems

Current consumption in standby mode: 6.6 µA

Dynamic range: 60 dB

Ultra low power wake-up systems

RSSI step: (∆V_RSSI@ 1 mVpp input amp.): 290 mV

Revision No. 1.1, Date: 09-2005

Page 1 of 2

merged, translated, stored, or used without the prior written consent of the copyright owner. To the best of its knowledge,

austriamicrosystems asserts that the information contained in this publication is accurate and correct.

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