ATA5277 Datasheet, PDF (1/20 Pages) ATMEL Corporation – STAND-ALONE ANTENNA DRIVER

Features
• Programmable Driver Current Regulation
• Antenna Driver Stage for 1 A Peak Current
• LF Baudrates between 1 kbaud to 8 kbaud
• Integrated Oscillator for Ceramic Resonators
• Two Inputs for Push-button Switches
• Bi-directional Single-wire Interface
• Diagnosis Function and Overtemperature Protection
• Quick Start Control (QSC) for Fast Oscillation Build-up and Decay Timing
• Operation Temperature -40°C to +85°C
• Carrier Frequency Range from 100 kHz to 150 kHz
• Amplitude Shift Keying (ASK) Modulation
• Phase Shift Keying (PSK) Modulation
• Power Supply Range 7 V to 16 V Direct Battery Input (6 V and 28 V with Limited
Function Range)
• EMI and ESD According to Automotive Requirements
• Highly Integrated — Less External Components Required
Applications
• Car Access
Benefits
• Dedicated for Decentralized Systems
• Constant Magnetic Field Strength
Electrostatic sensitive device.
Observe precautions for handling.
Stand-alone
Antenna Driver
ATA5277
Preliminary
Description
The circuit is an integrated BCDMOS antenna driver IC dedicated as a transmitter for
Passive Entry/Go (PEG) car applications and for other handsfree access control
applications.
It includes the full functionality to generate a magnetic LF field in conjunction with an
antenna coil to transmit data to a receiver in a key fob, card or transponder. The trans-
mission can be controlled via an one wire I/O interface (DIO) by an external control
unit.
Rev. 4669B–RKE–10/03