TIPGA450-Q1超声波汽车倒车解决方案
2012-06-08
</a>传感器" title="传感器">传感器" title="传感器">传感器接口器件,集成了电压稳压器,12位SAR ADC,8位微控制器,数字带通滤波器,DAC,两个NMOS低边驱动器,低噪音放大器,振荡器,LIN 2.1物理接口协议接口.主要用于汽车泊车, 盲区检测和物体检测.本文介绍了PGA450-Q1主要特性,功能方框图, 应用电路图, 评估板PGA450-Q1 EVM主要特性,电路图和PCB布局图.
The PGA450-Q1 is a fully integrated interface device for ultrasonic transducers used in automotive park distance or object detection applications. It incorporates these system blocks: voltage regulators, a 12-bit SAR ADC, an 8-bit microcontroller, a digital band-pass filter, a DAC, dual NMOS low-side drivers, a low-noise amplifier, an oscillator, and a LIN 2.1 physical interface and protocol for interfacing.
The PGA450-Q1 possesses an 8-bit microcontroller and OTP memory for program storage for processing the echo signal and calculating the distance between the transducer and the object. This data is transmitted through the LIN 2.1 communication protocol. The LIN 2.1 physical layer is slave-only and does not implement the LIN wake-up feature.
PGA450-Q1主要特性:
Dual NMOS Low-Side Drivers
Configurable Burst Generator
Low-Noise Amplifier
12-Bit SAR ADC
Configurable Digital Band-Pass Filter
Digital Signal Envelope Detect
On-Chip 8-Bit Microprocessor
LIN 2.1 Physical Interface and Protocol
Watchdog Timer
Four-Wire SPI for Testability / Programming
8K Bytes OTP
768 Bytes of FIFO RAM
256 Bytes Scratchpad RAM
8K Bytes of Development RAM
32 Bytes of EEPROM for Application
PGA450-Q1应用:
Automotive Park Distance
Blind Spot Detection
Object Detection Applications
图1.PGA450-Q1功能方框图
The digital data path has the following components:
• Band-pass filter
• Rectifier
• Peak extractor
• Downsampler
• Low-pass filter
图2.PGA450-Q1数字数据通路方框图
图3.PGA450-Q1应用电路图
评估板PGA450-Q1 EVM
This user’s guide describes the characteristics, operation, and use of the PGA450-Q1 EVM.
评估板PGA450-Q1 EVM主要特性:
• Single power-supply input for basic operation
• Example single-ended transformer and 58-kHz transducer
• LIN master transceiver
• RS-232 transceiver for UART testing and debug
• PC control with a graphical user interface and USB communications board
图4.评估板PGA450-Q1 EVM外形图
图5.评估板PGA450-Q1 EVM电路图:LIN
图6.评估板PGA450-Q1 EVM电路图:电源
图7.评估板PGA450-Q1 EVM电路图:RS232
图8.评估板PGA450-Q1 EVM电路图:USB控制器
图9.评估板PGA450-Q1 EVM电路图: PGA450-Q1
图10.评估板PGA450-Q1 EVM PCB布局图:顶层
图11.评估板PGA450-Q1 EVM PCB布局图:底层
详情请见:
http://www.ti.com/lit/ds/symlink/pga450-q1.pdf
和
http://www.ti.com/lit/ug/sldu007/sldu007.pdf
The PGA450-Q1 is a fully integrated interface device for ultrasonic transducers used in automotive park distance or object detection applications. It incorporates these system blocks: voltage regulators, a 12-bit SAR ADC, an 8-bit microcontroller, a digital band-pass filter, a DAC, dual NMOS low-side drivers, a low-noise amplifier, an oscillator, and a LIN 2.1 physical interface and protocol for interfacing.
The PGA450-Q1 possesses an 8-bit microcontroller and OTP memory for program storage for processing the echo signal and calculating the distance between the transducer and the object. This data is transmitted through the LIN 2.1 communication protocol. The LIN 2.1 physical layer is slave-only and does not implement the LIN wake-up feature.
PGA450-Q1主要特性:
Dual NMOS Low-Side Drivers
Configurable Burst Generator
Low-Noise Amplifier
12-Bit SAR ADC
Configurable Digital Band-Pass Filter
Digital Signal Envelope Detect
On-Chip 8-Bit Microprocessor
LIN 2.1 Physical Interface and Protocol
Watchdog Timer
Four-Wire SPI for Testability / Programming
8K Bytes OTP
768 Bytes of FIFO RAM
256 Bytes Scratchpad RAM
8K Bytes of Development RAM
32 Bytes of EEPROM for Application
PGA450-Q1应用:
Automotive Park Distance
Blind Spot Detection
Object Detection Applications
图1.PGA450-Q1功能方框图
The digital data path has the following components:
• Band-pass filter
• Rectifier
• Peak extractor
• Downsampler
• Low-pass filter
图2.PGA450-Q1数字数据通路方框图
图3.PGA450-Q1应用电路图
评估板PGA450-Q1 EVM
This user’s guide describes the characteristics, operation, and use of the PGA450-Q1 EVM.
评估板PGA450-Q1 EVM主要特性:
• Single power-supply input for basic operation
• Example single-ended transformer and 58-kHz transducer
• LIN master transceiver
• RS-232 transceiver for UART testing and debug
• PC control with a graphical user interface and USB communications board
图4.评估板PGA450-Q1 EVM外形图
图5.评估板PGA450-Q1 EVM电路图:LIN
图6.评估板PGA450-Q1 EVM电路图:电源
图7.评估板PGA450-Q1 EVM电路图:RS232
图8.评估板PGA450-Q1 EVM电路图:USB控制器
图9.评估板PGA450-Q1 EVM电路图: PGA450-Q1
图10.评估板PGA450-Q1 EVM PCB布局图:顶层
图11.评估板PGA450-Q1 EVM PCB布局图:底层
详情请见:
http://www.ti.com/lit/ds/symlink/pga450-q1.pdf
和
http://www.ti.com/lit/ug/sldu007/sldu007.pdf
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