ATA5275 Datasheet, PDF (1/16 Pages) ATMEL Corporation – 125 kHz TRANSMITTER IC FOR TPM

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.
125 kHz
Transmitter IC
for TPM
ATA5275
Preliminary
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.
Rev. 4739C–AUTO–02/05