ATA5278

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 1 A 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 7.5 V to 16 V Direct Battery Input (Up to 28 V 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


Application

•Hands-free Car Access (Passive Entry/Go)
•Tire Pressure Measurement
•Home Access Control
•Care Watch Systems


Pinout




Specifications

Parameters	Symbol	Value	Unit
Supply voltage	VBATT	-0.3 to +44	V
Input voltage (power pins)	VINP	VSS -0.3 VIN 46,5	V
Input voltage (interface pins)	VIND	VSS -0.3 VIN 5.5	V
Static power dissipation (Tamb = 85°C)	Ptot	2	W
Emission	EMI	250	V/M
Minimum ESD protection (HBM, 100 pF through 1.5 kΩ)	ESD	1.5 (pins 7, 17, 26-28 versus other pins) 2 (all other pins versus each other) 2 (all pins versus GND) 4 (pins 5, 6, 7, 8 vs. GND)	kV
Junction temperature	TJ	150	°C
Storage temperature range	Tstg	-55 to +150	°C

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.

ATA5278 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.