Ultrasonic Sensor Signal Processor with Integrated Microcontroller (MCU)


Product details


Type Integrated Features Transformer drive Frequency (kHz) 40-70 kHz Gain (Min) (dB) 40 Gain (Max) (dB) 64 Number of input channels 1 Supply voltage (Max) 18 Operating temperature range (C) -40 to 125 Supply voltage (Min) 7 Interface type LIN / SCI, UART, GPIO, SPI Rating Automotive open-in-new Find other Ultrasonic sensor AFEs

Package | Pins | Size

TSSOP (PW) 28 62 mm² 9.7 x 6.4 open-in-new Find other Ultrasonic sensor AFEs


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    Measurements up to 7 Meters through Air
  • Dual NMOS Low-Side Drivers
  • Configurable Burst Generator
  • Low-Noise Amplifier
  • 12-Bit SAR ADC
  • Configurable Digital Bandpass Filter
  • Digital Signal Envelope Detect
  • On-Chip 8-Bit Microprocessor
  • LIN 2.1 Physical Interface and Protocol
  • Watchdog Timer
  • Four-Wire SPI for Testability and Programming
  • 8K Bytes of OTP
  • 768 Bytes of FIFO RAM
  • 256 Bytes of Scratchpad RAM
  • 8K Bytes of Development RAM
  • 32 Bytes of EEPROM for Application

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The PGA450-Q1 device is a fully integrated system-on-a-chip analog front-end for ultrasonic sensing in automotive park-assist, object-detection through air, level sensing in large tanks, and distance measurements for anti-collision and landing assist of unmanned systems (such as drones, cameras, and robots). This highly integrated device enables a small form-factor and cost-optimized solution compared to discrete ultrasonic-sensor solutions. The PGA450-Q1 device can measure distances ranging from less than 1 meter up to 7 meters, at a resolution of 1 cm depending on the transducer-transformer sensor pair used in the system.

The PGA450-Q1 device has an integrated 8051 8-bit microcontroller and OTP memory for program storage to process the echo signal and calculate the distance between the transducer and targeted object. Full programmability is available for optimization of specific end applications, and to accommodate a wide-range of closed-top or open-top transducers. Configurable variables include the number of transmit pulses, driving frequency, LNA gain, and comparison signal thresholds. External communication with the PGA450-Q1 device is capable through the LIN 2.1 protocol, SPI, or UART interfaces.

For all available packages, see the orderable addendum at the end of the data sheet.
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Similar but not functionally equivalent to the compared device:
PGA460-Q1 ACTIVE Automotive ultrasonic signal processor and transducer driver PGA460-Q1 is an ultrasonic signal processor and transducer driver that supports a wider frequency range 30-80 kHZ and 180-480 kHz.

Technical documentation

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Type Title Date
* Data sheet PGA450-Q1 Ultrasonic-Sensor Signal Conditioner datasheet (Rev. D) Jun. 07, 2016
Application note Ultrasonic Sensing Basics (Rev. C) Mar. 26, 2020
Application note PGA450-Q1 Software Development Guide Oct. 31, 2018
Technical article How ultrasonic technology improves convenience and performance in home automation Oct. 05, 2017
Technical article Power naps: saving energy using ultrasonic sensing Aug. 16, 2016
Application note PGA450-Q1 Reset Issue During VPWR Ramp Down May 24, 2016
User guide PGA450Q1EVM-S User's Guide and TIDA-00151 UART Demo Instructional (Rev. B) Mar. 24, 2016
User guide PGA450Q1EVM User's Guide (Rev. C) Nov. 05, 2015
Application note LIN Demonstration using PGA450Q1EVM Firmware Rev 2.1 (Rev. A) Jul. 13, 2015
Application note Optimizing Performance of the PGA450-Q1 Jun. 23, 2015
Application note Automatic Slave Node Position Detection (SNPD) for PGA450-Q1 Jun. 17, 2015
Technical article Happy new year! Let's go to Vegas! Jan. 07, 2014
Technical article Future cars – Not so far away! Oct. 18, 2013
Application note 3Q 2012 Issue Analog Applications Journal Jul. 17, 2012
Application note Using a fixed threshold in ultrasonic distance-ranging automotive applications Jul. 17, 2012

Design & development

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Hardware development

document-generic User guide

This evaluation module features a PGA450-Q1 device which is a system on Chip (SOC) sensor interface IC for automotive ultrasonic sensors. It provides all signal conditioning and processing for the transducer echo signals and for calculating the distance between the transducer and objects. MCU and (...)

  • Flexibility in transducer selection (40 kHz – 70 kHz)
  • SoC that is highly programmable with integrated 8051 core
  • Integrated LIN2.1 master transceiver
  • Can be directly connected to car battery, no wide input range LDO required
  • Load dump protection
  • AEC Q-100

Software development

SLDC008F.ZIP (5713 KB)

Design tools & simulation

SLDC019.ZIP (42 KB)

Reference designs

Automotive Ultrasonic Sensor Interface IC for Park Assist or Blind Spot Detection Systems
TIDA-00151 The TIDA-00151 reference design contains a PGA450-Q1 which is a system on Chip (SOC) sensor interface IC for automotive Ultrasonic sensors. It provides all signal conditioning and processing for the transducer echo signals and for calculating the distance between the transducer and objects. MCU and (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 28 View options

Ordering & quality

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  • Ongoing reliability monitoring

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