ATA5277

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



Application

• Car Access


Pinout




Specifications

Parameters	Symbol	Value	Unit
Supply voltage	VBATT	-0.3 to +44	V
Input voltage (on any pin)	VIN	VSS-0.3 VIN 44	V
Power dissipation (IC, QFN)	Ptot	2	W
Emission	EMI	250	V/M
Minimum ESD protection (100 pF through 1.5 k)	ESD	2 (onboard pins) 4 (offboard pins)	kV
Junction temperature	TJ	150	°C
Storage temperature range	Tstg	-55 to +150	°C

Description

The circuit ATA5277 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.

ATA5277 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 transmission can be controlled via an one wire I/O interface (DIO) by an external control unit.