Features
• Antenna Driver Stage with Adjustable Antenna Peak Current for up to 1.5 A
Frequency Tuning Range from 100 kHz to 150 kHz
Automatic Antenna Peak Current Regulation
Self-tuning Oscillator for Antenna Resonant Frequency Adaption
Capable of Driving a High-Q Antenna
Integrated 5 V Regulator for External Load up to 10 mA
Bi-directional Single Wire Interface for Microcontroller or ECU
LF Baud Rates up to 4 kbaud and Amplitude Shift Keying (ASK) Modulation
Low Power Standby Mode < 50 µA
Antenna Driver Diagnosis: Peak Current, Antenna Frequency and Battery Voltage
Monitoring
Power Supply Range 8 V to 24 V Direct Battery Input
Load Dump Protection up to 45 V for 12 V Boards
Operation at Temperature -40°C to +105°C
EMI and ESD According to Automotive Requirements
Highly Integrated, Fewer External Components Required
Driver Overcurrent Protection
Overtemperature Protection
Applications
Tire Pressure Measurement (TPM)
Benefits
Self Tuning Capability to Antenna Resonance Frequency
Adjustable Antenna Peak Current Value
Highest Integration Level for Embedded Automotive Systems
Electrostatic sensitive device.
Observe precautions for handling.
Description
The ATA5275 is an integrated 1.5 A peak current BCDMOS antenna driver IC dedi-
cated as a 125 kHz wake-up channel transmitter for TPM applications.
It includes the full functionality to generate a magnetic LF field in conjunction with an
antenna coil to transmit data and power to a receiver. The transmission can be con-
trolled via a one wire I/O-interface by an external unit.
The smart power IC is delivered in a QFN20 power package with heat slug.
125 kHz
Transmitter IC
for TPM
ATA5275
Preliminary
Rev. 4739C–AUTO–02/05