ATA5811C-PLQW

ATA5811C-PLQW Datasheet

• High FSK Sensitivity -106 dBm at 20 kBaud/-109.5 dBm at kBaud MHz<br>• High ASK Sensitivity dBm at 10 kBaud/-116.5 dBm at kBaud MHz<br>• Low Supply Current mA in RX and TX Mode 3 V/TX with 5 dBm<br>• Data Rate 1 to 20 kBaud Manchester FSK, 1 to 10 kBaud Manchester ASK<br>• ASK/FSK Receiver Uses a Low-IF Architecture with High Selectivity, Blocking and Low

Part	Datasheet
ATA5811C-PLQW	ATA5811C-PLQW (pdf)

Related Parts	Information
ATA5812C-PLQW	ATA5812C-PLQW

PDF Datasheet Preview
• High FSK Sensitivity -106 dBm at 20 kBaud/-109.5 dBm at kBaud MHz • High ASK Sensitivity dBm at 10 kBaud/-116.5 dBm at kBaud MHz • Low Supply Current mA in RX and TX Mode 3 V/TX with 5 dBm • Data Rate 1 to 20 kBaud Manchester FSK, 1 to 10 kBaud Manchester ASK • ASK/FSK Receiver Uses a Low-IF Architecture with High Selectivity, Blocking and Low Intermodulation Typical Blocking 55 dB at ±750 kHz/61 dB at MHz and 70 dB at ±10 MHz, System I1dBCP = -30 dBm/System IIP3 = -20 dBm • 226 kHz IF Frequency with 30 dB Image Rejection and 170 kHz Usable IF Bandwidth • Transmitter Uses Closed Loop Fractional-N Synthesizer for FSK Modulation with a High PLL Bandwidth and an Excellent Isolation between PLL and PA • Tolerances of XTAL Compensated by Fractional-N Synthesizer with 800 Hz RF Resolution • Integrated RX/TX-Switch, Single-ended RF Input and Output • RSSI Received Signal Strength Indicator • Communication to Microcontroller with SPI Interface Working at Maximum 500 kBit/s • Configurable Self Polling and RX/TX Protocol Handling with FIFO-RAM Buffering of Received and Transmitted Data • 5 Push Button Inputs and One Wake-up Input are Active in Power-down Mode • Integrated XTAL Capacitors • PA Efficiency up to 38% 433 MHz/10 dBm/3 V • Low Inband Sensitivity Change of Typically dB within ±58 kHz Center Frequency Change in the Complete Temperature and Supply Voltage Range • Supply Voltage Switch, Supply Voltage Regulator, Reset Generation, Clock/Interrupt Generation and Low Battery Indicator for Microcontroller • Fully Integrated PLL with Low Phase Noise VCO and PLL Loop Filter • Sophisticated Threshold Control and Quasi Peak Detector Circuit in the Data Slicer • Power Management via Different Operation Modes • MHz, MHz and 315 MHz without External VCO and PLL Components • Inductive Supply with Voltage Regulator if Battery is Empty AUX Mode • Efficient XTO Start-up Circuit > Worst Case Start Impedance • Changing of Modulation Type ASK/FSK and Data Rate without Component Changes • Minimal External Circuitry Requirements for Complete System Solution • Adjustable Output Power 0 to 10 dBm Adjusted and Stabilized with External Resistor • ESD Protection at all Pins 2 kV HBM, 200 V MM • Supply Voltage Range V to V or V to V • Temperature Range -40°C to +105°C • Small 7 x 7 mm QFN48 Package • Automotive Keyless Entry and Passive Entry Go Systems • Access Control Systems • Remote Control Systems • Alarm and Telemetry Systems • Energy Metering • Home Automation • No SAW Device Needed in Key Fob Designs to Meet Automotive Specifications • Low System Cost Due to Very High System Integration Level • Only One Crystal Needed in System • Less Demanding Specification for the Microcontroller Due to Handling of Power-down Mode, Delivering of Clock, Reset, Low Battery Indication and Complete Handling of Receive/Transmit Protocol and Polling • Single-ended Design with High Isolation of PLL/VCO from PA and the Power Supply Allows a Loop Antenna in the Key Fob to Surround the Whole Application UHF ASK/FSK Transceiver ATA5811 ATA5812 Preliminary The ATA5811/ATA5812 is a highly integrated UHF ASK/FSK single-channel half-duplex transceiver with low power consumption supplied in a small QFN48 package. The receive part is built as a fully integrated low-IF receiver, whereas direct PLL modulation with the fractional-N synthesizer is used for FSK transmission and switching of the power amplifier for ASK transmission. The device supports data rates of 1 kBaud to 20 kBaud FSK and 1 kBaud to 10 kBaud ASK in Manchester, Bi-phase and other codes in transparent mode. The ATA5811 can be used in the 433 MHz to 435 MHz and the 868 MHz to 870 MHz band, the ATA5812 in the 314 MHz to 316 MHz band. The very high system integration level results in few numbers of external components needed. Due to its blocking and selectivity performance, together with the additional 15 dB to 20 dB loss and the narrow bandwidth of a typical key fob loop antenna, a bulky blocking SAW is not needed in the key fob or sensor application. Additionally, the building blocks needed for a typical RKE and access control system on both sides, the base and the mobile stations, are fully integrated. Its digital control logic with self polling and protocol generation enables a fast challenge response systems without using a high-performance microcontroller. Therefore, the ATA5811/ATA5812 contains a FIFO buffer RAM and can compose and receive the physical messages themselves. This provides more time for the microcontroller to carry out other functions such as calculating crypto algorithms, composing the logical messages and controlling other devices. Due to that, a standard 4-/8-bit microcontroller without special periphery and clocked with the CLK output of about MHz is sufficient to control the communication link. This is especially valid for passive entry and access control systems, where within less than 100 ms several challenge response communications with arbitration of the communication partner have to be handled. It is hence possible to design bi-directional RKE and access control systems with a fast challenge response crypto function with the same PCB board size and with the same current consumption as uni-directional RKE systems. Figure System Block Diagram Antenna Matching ATA5811/ATA5812 RF transceiver Digital Control Logic Power Supply Micorcontroller Interface Microcontroller 4 8 2 ATA5811/ATA5812 [Preliminary] ATA5811/ATA5812 [Preliminary] Figure Pinning QFN48 NC RX_ACTIVE T1 T2 T3 T4 T5 PWR_ON RX_TX1 RX_TX2 CDEM NC RF_IN NC 433_N868 NC R_PWR PWR_H RF_OUT NC 48 47 46 45 44 43 42 41 40 39 38 37 6 ATA5811/ATA5812 31 13 14 15 16 17 18 19 20 21 22 23 24 RSSI CS DEM_OUT SCK SDI_TMDI SDO_TMDO CLK IRQ N_RESET VSINT NC XTAL2 NC AVCC VS2 VS1 VAUX TEST1 DVCC VSOUT TEST2 XTAL1 Pin Description Symbol Function Not connected Not connected Not connected RF_IN RF input Not connected 433_N868 Selects RF input/output frequency range Not connected R_PWR Resistor to adjust output power PWR_H Pin to select output power Ordering Information Extended Type Number ATA5811-PLQC ATA5812-PLQC Package Information Package QFN48 Remarks 7 mm x 7 mm 7 mm x 7 mm 88 ATA5811/ATA5812 [Preliminary] ATA5811/ATA5812 [Preliminary] Table of Contents Features 1 Applications 1 Benefits 1 General Description 2 Pin Description 3 Application Circuits 6 Typical Key Fob or Sensor Application with 1 Battery Typical Car or Sensor Base-station Application Typical Key Fob Application, 2 Batteries RF Transceiver XTO Power Supply Microcontroller Interface Digital Control Logic Transceiver Configuration Operation Modes Absolute Maximum Ratings 62 Thermal Resistance 62 Electrical Characteristics General 63 Electrical Characteristic 1-Battery Application 75 Electrical Characteristics 2-Battery Application 78 Electrical Characteristics Car Application 80 Digital Timing Characteristics 82 Digital Port Characteristics 86 Ordering Information 88 Package Information 88 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.

PDF Datasheet Preview

• High FSK Sensitivity -106 dBm at 20 kBaud/-109.5 dBm at kBaud MHz
• High ASK Sensitivity dBm at 10 kBaud/-116.5 dBm at kBaud MHz
• Low Supply Current mA in RX and TX Mode 3 V/TX with 5 dBm
• Data Rate 1 to 20 kBaud Manchester FSK, 1 to 10 kBaud Manchester ASK
• ASK/FSK Receiver Uses a Low-IF Architecture with High Selectivity, Blocking and Low

Intermodulation Typical Blocking 55 dB at ±750 kHz/61 dB at MHz and 70 dB at ±10 MHz, System I1dBCP = -30 dBm/System IIP3 = -20 dBm
• 226 kHz IF Frequency with 30 dB Image Rejection and 170 kHz Usable IF Bandwidth
• Transmitter Uses Closed Loop Fractional-N Synthesizer for FSK Modulation with a High PLL Bandwidth and an Excellent Isolation between PLL and PA
• Tolerances of XTAL Compensated by Fractional-N Synthesizer with 800 Hz RF Resolution
• Integrated RX/TX-Switch, Single-ended RF Input and Output
• RSSI Received Signal Strength Indicator
• Communication to Microcontroller with SPI Interface Working at Maximum 500 kBit/s
• Configurable Self Polling and RX/TX Protocol Handling with FIFO-RAM Buffering of Received and Transmitted Data
• 5 Push Button Inputs and One Wake-up Input are Active in Power-down Mode
• Integrated XTAL Capacitors
• PA Efficiency up to 38% 433 MHz/10 dBm/3 V
• Low Inband Sensitivity Change of Typically dB within ±58 kHz Center Frequency Change in the Complete Temperature and Supply Voltage Range
• Supply Voltage Switch, Supply Voltage Regulator, Reset Generation, Clock/Interrupt Generation and Low Battery Indicator for Microcontroller
• Fully Integrated PLL with Low Phase Noise VCO and PLL Loop Filter
• Sophisticated Threshold Control and Quasi Peak Detector Circuit in the Data Slicer
• Power Management via Different Operation Modes
• MHz, MHz and 315 MHz without External VCO and PLL Components
• Inductive Supply with Voltage Regulator if Battery is Empty AUX Mode
• Efficient XTO Start-up Circuit > Worst Case Start Impedance
• Changing of Modulation Type ASK/FSK and Data Rate without Component Changes
• Minimal External Circuitry Requirements for Complete System Solution
• Adjustable Output Power 0 to 10 dBm Adjusted and Stabilized with External Resistor
• ESD Protection at all Pins 2 kV HBM, 200 V MM
• Supply Voltage Range V to V or V to V
• Temperature Range -40°C to +105°C
• Small 7 x 7 mm QFN48 Package
• Automotive Keyless Entry and Passive Entry Go Systems
• Access Control Systems
• Remote Control Systems
• Alarm and Telemetry Systems
• Energy Metering
• Home Automation
• No SAW Device Needed in Key Fob Designs to Meet Automotive Specifications
• Low System Cost Due to Very High System Integration Level
• Only One Crystal Needed in System
• Less Demanding Specification for the Microcontroller Due to Handling of Power-down

Mode, Delivering of Clock, Reset, Low Battery Indication and Complete Handling of Receive/Transmit Protocol and Polling
• Single-ended Design with High Isolation of PLL/VCO from PA and the Power Supply Allows a Loop Antenna in the Key Fob to Surround the Whole Application

UHF ASK/FSK Transceiver ATA5811 ATA5812 Preliminary

The ATA5811/ATA5812 is a highly integrated UHF ASK/FSK single-channel half-duplex transceiver with low power consumption supplied in a small QFN48 package. The receive part is built as a fully integrated low-IF receiver, whereas direct PLL modulation with the fractional-N synthesizer is used for FSK transmission and switching of the power amplifier for ASK transmission.

The device supports data rates of 1 kBaud to 20 kBaud FSK and 1 kBaud to 10 kBaud ASK in Manchester, Bi-phase and other codes in transparent mode. The ATA5811 can be used in the 433 MHz to 435 MHz and the 868 MHz to 870 MHz band, the ATA5812 in the 314 MHz to 316 MHz band. The very high system integration level results in few numbers of external components needed.

Due to its blocking and selectivity performance, together with the additional 15 dB to 20 dB loss and the narrow bandwidth of a typical key fob loop antenna, a bulky blocking SAW is not needed in the key fob or sensor application. Additionally, the building blocks needed for a typical RKE and access control system on both sides, the base and the mobile stations, are fully integrated.

Its digital control logic with self polling and protocol generation enables a fast challenge response systems without using a high-performance microcontroller. Therefore, the ATA5811/ATA5812 contains a FIFO buffer RAM and can compose and receive the physical messages themselves. This provides more time for the microcontroller to carry out other functions such as calculating crypto algorithms, composing the logical messages and controlling other devices. Due to that, a standard 4-/8-bit microcontroller without special periphery and clocked with the CLK output of about MHz is sufficient to control the communication link. This is especially valid for passive entry and access control systems, where within less than 100 ms several challenge response communications with arbitration of the communication partner have to be handled.

It is hence possible to design bi-directional RKE and access control systems with a fast challenge response crypto function with the same PCB board size and with the same current consumption as uni-directional RKE systems.

Figure System Block Diagram

Antenna Matching

ATA5811/ATA5812

RF transceiver

Digital Control Logic

Power Supply

Micorcontroller Interface

Microcontroller 4 8
2 ATA5811/ATA5812 [Preliminary]

ATA5811/ATA5812 [Preliminary]

Figure Pinning QFN48

NC RX_ACTIVE T1 T2 T3 T4 T5 PWR_ON RX_TX1 RX_TX2 CDEM

NC RF_IN NC 433_N868 NC R_PWR PWR_H RF_OUT NC
48 47 46 45 44 43 42 41 40 39 38 37
6 ATA5811/ATA5812 31
13 14 15 16 17 18 19 20 21 22 23 24

RSSI CS DEM_OUT SCK SDI_TMDI SDO_TMDO CLK IRQ N_RESET VSINT NC XTAL2

NC AVCC VS2 VS1 VAUX TEST1 DVCC VSOUT TEST2 XTAL1

Pin Description

Symbol Function

Not connected

Not connected

Not connected

RF_IN

RF input

Not connected
433_N868 Selects RF input/output frequency range

Not connected

R_PWR Resistor to adjust output power

PWR_H Pin to select output power
Ordering Information

Extended Type Number ATA5811-PLQC ATA5812-PLQC

Package Information

Package QFN48

Remarks 7 mm x 7 mm 7 mm x 7 mm
88 ATA5811/ATA5812 [Preliminary]

ATA5811/ATA5812 [Preliminary]

Table of Contents

Features 1

Applications 1

Benefits 1

General Description 2

Pin Description 3

Application Circuits 6

Typical Key Fob or Sensor Application with 1 Battery Typical Car or Sensor Base-station Application Typical Key Fob Application, 2 Batteries RF Transceiver XTO Power Supply Microcontroller Interface Digital Control Logic Transceiver Configuration Operation Modes

Absolute Maximum Ratings 62

Thermal Resistance 62

Electrical Characteristics General 63

Electrical Characteristic 1-Battery Application 75

Electrical Characteristics 2-Battery Application 78

Electrical Characteristics Car Application 80

Digital Timing Characteristics 82

Digital Port Characteristics 86
Ordering Information 88

Package Information 88

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: ATA5811C-PLQW 519188