ATA5278_06 Datasheet, PDF (1/34 Pages) ATMEL Corporation – Stand-alone Antenna Driver

Features
• SPI for Microcontroller Connection with Up to 1 Mbit/s
• Internal Data Buffer for Timing-independent Data Transmission
• Programmable Driver Current Regulation
• One-chip Antenna Driver Stage for 1A Peak Current
• LF Baud Rates Between 1 kbaud and 4 kbaud
• Quick Start Control (QSC) for Fast Oscillation Build-up and Decay Timing
• Integrated Oscillator for Ceramic Resonators
• Power Supply Range from 7.5V to 16V Direct Battery Input
(Up to 28V With Limited Function Range)
• Amplitude Shift Keying (ASK) Modulation
• Phase Shift Keying (PSK) Modulation
• Carrier Frequency Range from 100 kHz to 150 kHz
• Operational Temperature –40°C to +105°C
• EMI and ESD According to Automotive Requirements
• Highly Integrated — Less External Components Required
Applications
• Hands-free Car Access (Passive Entry/Go)
• Tire Pressure Measurement
• Home Access Control
• Care Watch Systems
Benefits
• Diagnosis Function and Overtemperature Protection
• Load Dump Protection Up to 45V for 12V Boards
• Power-down Mode for Minimum Power Consumption
Stand-alone
Antenna Driver
ATA5278
1. Description
The ATA5278 device is an integrated BCDMOS antenna driver IC dedicated as a
transmitter for Passive Entry/Go (PEG) car applications and for other hands-free
access control applications.
It includes the full functionality of generating a magnetic LF field in conjunction with an
antenna coil to transmit data to a receiver in a key fob, card or transponder. A micro-
controller can access the chip via a bi-directional serial interface.
Rev. 4832C–RKE–02/06