ATA5282-6AQH

ATA5282-6AQH Datasheet

The ATA5282 is a 125-kHz ultra low power receiver IC with three input channels for Passive Entry Go applications. It includes all circuits for an LF wake-up channel. The three sensitive input stages of the IC amplifier demodulate and measure the input signal from the antenna coils. The microcontroller interface of the IC outputs the data signal as well as the measured RSSI values. During standby mode, the header detection unit monitors the incoming signal and generates a wake-up signal for the microcontroller if the IC receives a valid 125-kHz carrier signal.

Part	Datasheet
ATA5282-6AQH	ATA5282-6AQH (pdf)

Related Parts	Information
ATA5282-6APH	ATA5282-6APH

PDF Datasheet Preview
• Three Input Channels for 3D Antennas • mVPP Sensitivity Typically • Ultra Low Current Operation Consumption • 2 µA Standby Current Typically • 4 µA Active Current Typically • Power Supply 2 V to V • Carrier Frequency Range from 100 kHz to 150 kHz • Wake-up Function for a Microcontroller • Header Detection • Baud Rate up to 4 kbps ASK Modulation • Bi-directional Two-wire Interface • ESD According to Automotive Requirements • Digital RSSI for Field Strength Measurement • Coils Input Range from mVPP to VPP Typically • High Sensitivity • Passive Entry Go PEG /Car Access • Position Indicator • Home Access Control • RFID Systems The ATA5282 is a 125-kHz ultra low power receiver IC with three input channels for Passive Entry Go applications. It includes all circuits for an LF wake-up channel. The three sensitive input stages of the IC amplifier demodulate and measure the input signal from the antenna coils. The microcontroller interface of the IC outputs the data signal as well as the measured RSSI values. During standby mode, the header detection unit monitors the incoming signal and generates a wake-up signal for the microcontroller if the IC receives a valid 125-kHz carrier signal. By combining the IC with an antenna coil, a microcontroller, an RF transmitter/transceiver and a battery, it is possible to design a complete hands-free key for Passive Entry Go applications. Ultra Low Power 125 kHz 3D Wake-up Receiver with RSSI ATA5282 Figure Block Diagram ATA5282 3 Channel Amplifier with AGC Timing control L2 Signal conditioner Header detection L3 select Serial Vref interface field strength Battery VSS NDATA/ NWAKEUP NSCL Pin Configuration Figure Pinning TSSOP 8L COIL1 1 COIL2 2 COIL3 3 VSS 4 8 VDD 7 NDATA 6 NSCL 5 TC Pin Description Pin 1 2 3 4 5 6 Symbol COIL1 COIL2 COIL3 VSS TC NSCL NDATA Function Input Coil channel X Input Coil channel Y Input Coil channel Z Circuit ground Output Current output for oscillator adjustment Input Clock for serial interface default high Input/Output I/O data for serial interface and field strength measurement/ Wake-up function default high Battery voltage 2 ATA5282 [Preliminary] Functional Description ATA5282 [Preliminary] The ATA5282 is a 3-channel ASK receiver for 125-kHz carrier signals. Its three active input stages with very low power consumption and high input sensitivity allow to connect up to 3 antennas for direction-independent wake-up function and data transfer. Without a carrier signal the ATA5282 operates in standby listen mode. In this mode, it monitors the 3 Coil inputs with a very low current consumption. To activate the IC and the connected control unit, the transmitting end must send a preamble carrier burst and the header code. When a preamble has been detected, the IC activates the internal oscillator and the header check. The last gap at the end of a valid header enables the NDATA output. During data transfer, the NDATA pin outputs the demodulated and merged signal of the 3 input stages. To achieve data rates up to 4 kbps for input signals from mVPP to VPP it is necessary to control the gain of the amplifiers. Each of the 3 input stages contain an amplifier with Automatic Gain Control AGC . It is used to adapt the gain to the incoming signal strength, and is also used as RSSI for field strength measurements. The integrated synchronous serial interface uses the NSCL together with the NDATA pin as clock and data line. It allows to control several functions as well as read out the received signal field strength. Enabling only single coil inputs, freezing the actual status of the automatic gain control or resetting the complete circuit to the initial state at any time are built-in features. Ordering Information Extended Type Number ATA5282 Package Information Figure Package TSSOP 8L Package TSSOP 8L Remarks 22 ATA5282 [Preliminary] Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel 41 26-426-5555 Fax 41 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel 852 2721-9778 Fax 852 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel 81 3-3523-3551 Fax 81 3-3523-7581 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel 33 2-40-18-18-18 Fax 33 2-40-18-19-60 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France Tel 33 4-42-53-60-00 Fax 33 4-42-53-60-01 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel 44 1355-803-000 Fax 44 1355-242-743 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel 49 71-31-67-0 Fax 49 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759 Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel 33 4-76-58-30-00 Fax 33 4-76-58-34-80 Literature Requests Disclaimer Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. Atmel Corporation All rights reserved. and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be the trademarks of others. Printed on recycled paper.

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• Three Input Channels for 3D Antennas
• mVPP Sensitivity Typically
• Ultra Low Current Operation Consumption
• 2 µA Standby Current Typically
• 4 µA Active Current Typically
• Power Supply 2 V to V
• Carrier Frequency Range from 100 kHz to 150 kHz
• Wake-up Function for a Microcontroller
• Header Detection
• Baud Rate up to 4 kbps ASK Modulation
• Bi-directional Two-wire Interface
• ESD According to Automotive Requirements
• Digital RSSI for Field Strength Measurement
• Coils Input Range from mVPP to VPP Typically
• High Sensitivity
• Passive Entry Go PEG /Car Access
• Position Indicator
• Home Access Control
• RFID Systems

The ATA5282 is a 125-kHz ultra low power receiver IC with three input channels for Passive Entry Go applications. It includes all circuits for an LF wake-up channel. The three sensitive input stages of the IC amplifier demodulate and measure the input signal from the antenna coils. The microcontroller interface of the IC outputs the data signal as well as the measured RSSI values. During standby mode, the header detection unit monitors the incoming signal and generates a wake-up signal for the microcontroller if the IC receives a valid 125-kHz carrier signal.

By combining the IC with an antenna coil, a microcontroller, an RF transmitter/transceiver and a battery, it is possible to design a complete hands-free key for Passive Entry Go applications.

Ultra Low Power 125 kHz 3D Wake-up Receiver with RSSI

ATA5282

Figure Block Diagram

ATA5282
3 Channel Amplifier with AGC

Timing control

L2 Signal
conditioner

Header detection L3
select

Serial

Vref
interface
field strength

Battery VSS

NDATA/ NWAKEUP

NSCL

Pin Configuration

Figure Pinning TSSOP 8L

COIL1 1 COIL2 2 COIL3 3

VSS 4
8 VDD 7 NDATA 6 NSCL 5 TC

Pin Description

Pin 1 2 3 4 5 6

Symbol COIL1 COIL2 COIL3 VSS

TC NSCL

NDATA

Function Input Coil channel X Input Coil channel Y Input Coil channel Z Circuit ground Output Current output for oscillator adjustment Input Clock for serial interface default high Input/Output I/O data for serial interface and field strength measurement/ Wake-up function default high Battery voltage
2 ATA5282 [Preliminary]

Functional Description

ATA5282 [Preliminary]

The ATA5282 is a 3-channel ASK receiver for 125-kHz carrier signals. Its three active input stages with very low power consumption and high input sensitivity allow to connect up to 3 antennas for direction-independent wake-up function and data transfer.

Without a carrier signal the ATA5282 operates in standby listen mode. In this mode, it monitors the 3 Coil inputs with a very low current consumption. To activate the IC and the connected control unit, the transmitting end must send a preamble carrier burst and the header code. When a preamble has been detected, the IC activates the internal oscillator and the header check. The last gap at the end of a valid header enables the NDATA output.

During data transfer, the NDATA pin outputs the demodulated and merged signal of the 3 input stages.

To achieve data rates up to 4 kbps for input signals from mVPP to VPP it is necessary to control the gain of the amplifiers. Each of the 3 input stages contain an amplifier with Automatic Gain Control AGC . It is used to adapt the gain to the incoming signal strength, and is also used as RSSI for field strength measurements.

The integrated synchronous serial interface uses the NSCL together with the NDATA pin as clock and data line. It allows to control several functions as well as read out the received signal field strength. Enabling only single coil inputs, freezing the actual status of the automatic gain control or resetting the complete circuit to the initial state at any time are built-in features.
Ordering Information

Extended Type Number ATA5282

Package Information

Figure Package TSSOP 8L

Package TSSOP 8L

Remarks
22 ATA5282 [Preliminary]

Atmel Corporation
2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 487-2600

Regional Headquarters

Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel 41 26-426-5555 Fax 41 26-426-5500

Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel 852 2721-9778 Fax 852 2722-1369

Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel 81 3-3523-3551 Fax 81 3-3523-7581

Atmel Operations

Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314

Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314

La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel 33 2-40-18-18-18 Fax 33 2-40-18-19-60

ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France Tel 33 4-42-53-60-00 Fax 33 4-42-53-60-01
1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759

Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel 44 1355-803-000 Fax 44 1355-242-743

RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel 49 71-31-67-0 Fax 49 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759

Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom

Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel 33 4-76-58-30-00 Fax 33 4-76-58-34-80

Literature Requests

Disclaimer Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems.

Atmel Corporation All rights reserved. and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be the trademarks of others.

Printed on recycled paper.

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Datasheet ID: ATA5282-6AQH 519168