ATA5700/ATA5702 3D LF Receiver and UHF Transmitter Data Sheet
●Introduction：
The ATA5700/ATA5702 is a highly integrated, ultra-low power car access controller for Passive Entry/ Passive Start (PEPS) and Remote Keyless Entry (RKE) applications with an embedded AVR' 8-bit microc on troller in a single QFN 38 package. The device in eludes a highly sensitive 3D Low Frequency (LF) receiver, an immobilizer fro nt end, and an Ultra High Frequency (UHF) Amplitude Shift Keying (ASK)/ Frequency Shift Keying (FSK) Radio Frequency (RF) transmitter. It combines ultra-low power LF tech no logy with outstand i ng RF performance.
The low power microcontroller is based on the AVR-enhanced Reduced Instruction Set Computer (RISC) architecture. It has a rich set of digital peripherals, including a watchdog timer, a real time counter (RTC) several 8/16-bit timers, serial interfaces (SPI, TWI) and 19 General Purpose Input Output (GPIO) ports. It is equipped with low power memories such as Static RAM (SRAM), 32 KB Flash memory, and Secure EEPROM.
In addition, the core is supported by power-saving co-processing units, such as a powerful Advaneed Encryption Standard (AES) cipher engine and an autonomous operating protocol handler unit to support the data communication of LF receiver and transponder.
The highly sensitive 3D LF receiver enables the Integrated Chip (IC) to listen perpetually for wake-up pattern during the low power standby mode. If the IC is woken up and active, the LF receiver serves as a receive path for the data communication. In combination with the integrated and highly accurate logarithmic 3D Received Signal Strength Indicator (RSSI), the LF receiver supports PEPS position!ng requirements.
The RSSI control unit supports logarithmic to linear conversion, 3D vector sum calculation and the RSSI calibration algorithm.
The ATA5702 has an RF transmitter implemented with a fractional-N Phased Locked Loop (PLL) for high data rates, and is equipped with Gaussian waveshaping capability. The transmitter is designed for the ISM frequency bands in the ranges of 310 MHz to 318 MHz 418 MHz to 477 MHz and 836 MHz to 956 MHz
To support immobilizer functions, the IC is prepared for battery-less emergency operation. It contains a built-in 3D trsnsponder front end for wireless power supply and bidirectional communication via the LF ante nnas.
●Features
■System solution for immobilizer and PEPS functionality
■Optional integrated open source immobilizer software stack supports automotive immobilizer
■Supply voltage range from 2.0V to 4.2V
■Temperature Range from -40 to +85°C
■Excellent ESD protection at all pins (±4 kV HBM)
■Small 5x7 mm2 QFN 38 pin package with wettable flanks
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Datasheet |
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Please see the document for details |
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QFN 38 |
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English Chinese Chinese and English Japanese |
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2018/05/09 |
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Rev A |
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DS70005343A |
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627 KB |
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