Datasheet

User's Guide

SLDU007A–March 2012–Revised January 2013

PGA450-Q1 EVM User’s Guide

1 Read This First

The PGA450-Q1 is an interface device for ultrasonic transducers used in automotive parking assistance

and blind spot detection applications. The device functions as the driver and receiver for a wide range of

transducers with frequency ranges from 40kHz to 70kHz. The PGA450-Q1 incorporates an analog front

end (AFE) and a 8051W microprocessor core. The AFE includes voltage regulators, an amplifier, an ADC,

an oscillator, and a temperature sensor. The PGA450-Q1 also implements LIN 2.1 physical layer for

communication. For more details, see the device data sheet.

2 About This Manual

This user’s guide describes the characteristics, operation, and use of the PGA450-Q1 EVM. An EVM

description, GUI description, interface requirements, and complete schematic are included.

3 EVM Overview

The features of this EVM are as follows:

• Single power-supply input for basic operation

• Example push-pull 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

4 CAUTION

1. The PGA450-Q1EVM can have either a through-hole or surface-mount transformer installed on it.

When a through-hole transformer is installed, ensure that the case corners are not touching the

surface mount pads.

2. The PGA450-Q1EVM can be used to drive either a single-ended or push-pull transformer. The

selection of the drive method is achieved through jumper selection.

3. The USB communication board 5-V power supply must be enabled for LIN communication to work.

The 5-V power supply provides power to the LIN master transceiver installed on the board.

4. In order to communicate with PGA450-Q1 using SPI, the 8051W inside the device must be put in the

reset state.

SLDU007A–March 2012–Revised January 2013 PGA450-Q1 EVM User’s Guide

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