TRF4140-Q1 Datasheet, PDF (1/12 Pages) Texas Instruments – Abstract Low-Frequency Transceiver for Immobilizer, Passive Start, Passive Entry, and Wireless Charging Systems

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TRF4140-Q1
SLOS953A – JUNE 2016 – REVISED JUNE 2016
TRF4140-Q1 Abstract
Low-Frequency Transceiver for Immobilizer, Passive Start, Passive Entry, and
Wireless Charging Systems
1 Device Overview
1.1 Features
1
• Benefits
– Full Embedded Sequence Timing Controller
Removes All Timing Constraints From the Host
Controller
– Automatic Sequence Repetition for Easy
Implementation of Energy-Efficient Polling
Systems
– Separate Transmit and Receive Buffers Reduce
Host Controller Performance Requirements
– Embedded Sequence-Auto-Repeat Enables
Low-Power Polling System Without Host
Controller Interaction
– Embedded Half-Duplex (HDX) and Full-Duplex
(FDX) Protocol Support Enables Flexible and
Scalable System Implementation
– Sine-Wave Controlled Transmitter Stages
Enable High-Power Remote Antenna Systems
With Cable Lengths of Several Meters and
Superior EMC Performance
– Sequence Preloading With Event-Triggered
Execution for Fastest System Reaction Time
– Supports Wireless Charging Systems for Mobile
Devices
• Features
– Integrated Boost Controller for Wide Supply
Voltage Range With Jump Start and Load Dump
Protection
– Antenna Driver With up to 20-V Peak-to-Peak
Output Voltage Amplitude and up to 1-A Peak
Antenna Current With Sine-Wave or Square-
Wave Output
1.2 Applications
• Car Access
• Immobilizers
• Passive Entry, Passive Start (PEPS)
• Wireless Power Charging (Qi, WPC, PMA)
– Flexible Host Control Interface
• 3-Wire SPI
• 4-Wire SPI
• Configurable I/O Functions to Extend
Controller Interface Such as an Interrupt
Request Signal
• Interface Voltage Supply Range From 2.5 V
to 5.5 V
– Ultra-Low Current Consumption in Sleep State
– Fractional Synthesizer With 10-kHz to 500‑kHz
Frequency Range With 60-Hz Step Size
– PSK and ASK Transmitter Stage
– FSK and ASK Receiver and Demodulator
– Four Programmable Half-Bridge MOSFET
Antenna Drivers
– Pairs of Half-Bridge Antenna Drivers can be
Used Together as a Full-Bridge Driver to Double
the Possible Output Voltage Amplitude
– Antenna Current Measurement With 5-Bit
Resolution for High Side and Low Side of
Antenna Driver Stages
– Programmable Antenna Driver Output Voltage in
Sine-Wave Mode
– Supply-Controlled Antenna Driver Voltage in
Square-Wave Mode
– Output Stage is Overload Protected for
Overcurrent and Overtemperature Conditions
– Antenna Driver Diagnostics: Short to Ground,
Short to Antenna Driver Supply Voltage, and
Open Load Detection
– Supports On-Off Keying With Data Rates up to
70 kbps for Downlink and Uplink
• RFID Tag Readers (Full Duplex and Half Duplex)
• Other Applications Where the Physical
Characteristics of Low-Frequency Radio are
Beneficial
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.