Overview
The PGA460-Q1, produced by Texas Instruments, is a highly-integrated system on-chip ultrasonic transducer driver and signal conditioner. It features an advanced DSP core, making it suitable for various ultrasonic sensing applications. The device can drive a transducer using either a transformer-based topology or a direct-drive topology with external high-side FETs. It includes an analog front-end (AFE) with a low-noise amplifier, a programmable time-varying gain stage, and an ADC to process reflected echo signals for reliable object detection. The PGA460-Q1 also supports multiple communication interfaces, including a time-command interface (TCI), one-wire USART asynchronous interface, and CMOS-level USART interface. It has an ultra-low quiescent current low-power mode to reduce power consumption and includes on-chip system diagnostics for monitoring and ensuring the integrity of the system.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage (VPWR) | -0.3 | 30 | V | |
| Operating Junction Temperature | -40 | 125 | °C | |
| Storage Temperature (Tstg) | -40 | 125 | °C | |
| Sink Current (OUTA, OUTB) | 500 | mA | ||
| Low-Power Mode Input Current (ILPM) | 500 | µA | ||
| Maximum Driver Pulse Current (IPULSE_MAX_DRV) | 500 | mA | ||
| Junction-to-Ambient Thermal Resistance (RθJA) | 96.1 | °C/W | ||
| Package Type | TSSOP (16 pins) | |||
| Body Size | 5.00 mm × 4.40 mm |
Key Features
- Advanced DSP Core: Enables processing of digitized signals for both near-field and far-field object detection using time-varying thresholds.
- Analog Front-End (AFE): Includes a low-noise amplifier and a programmable time-varying gain stage feeding into an ADC.
- Multiple Drive Topologies: Supports transformer-based and direct-drive topologies using external high-side FETs.
- Communication Interfaces: Time-command interface (TCI), one-wire USART asynchronous interface, and CMOS-level USART interface.
- Low-Power Mode: Ultra-low quiescent current mode to reduce power consumption when not in use.
- On-Chip Diagnostics: Monitors transducer voltage, frequency, and decay time, as well as supply-side and transceiver-side diagnostics for overvoltage, undervoltage, overcurrent, and short-circuit scenarios.
Applications
- Ultrasonic Radar: For distance and object detection.
- Automotive Park Assist: Assists in parking by detecting objects around the vehicle.
- Lane-Departure and Collision Warning: Detects lane departure and potential collisions.
- Object Distance and Position Sensing: Accurately senses the distance and position of objects.
- Presence and Proximity Detection: Detects the presence and proximity of objects.
- Drone and Robotics Landing Assist and Obstacle Detection: Assists drones and robots in landing and detecting obstacles.
- Automotive and Industrial Door-Opening Sensing: Senses the opening and closing of doors.
- Automotive Motion Sensor for Intrusion Detection Alarm: Detects motion for intrusion detection alarms.
- Occupancy and Motion Sensors: Detects occupancy and motion in various environments.
Q & A
- What is the PGA460-Q1 device?
The PGA460-Q1 is a highly-integrated system on-chip ultrasonic transducer driver and signal conditioner with an advanced DSP core. - What are the supported drive topologies for the PGA460-Q1?
The device supports both transformer-based and direct-drive topologies using external high-side FETs. - What communication interfaces does the PGA460-Q1 support?
The device supports a time-command interface (TCI), one-wire USART asynchronous interface, and CMOS-level USART interface. - How does the PGA460-Q1 reduce power consumption?
The device can be put in an ultra-low quiescent current low-power mode to reduce power consumption when not in use. - What diagnostics does the PGA460-Q1 include?
The device includes on-chip system diagnostics for monitoring transducer voltage, frequency, and decay time, as well as supply-side and transceiver-side diagnostics. - What are some common applications of the PGA460-Q1?
Applications include ultrasonic radar, automotive park assist, lane-departure and collision warning, object distance and position sensing, presence and proximity detection, and more. - What is the operating junction temperature range of the PGA460-Q1?
The operating junction temperature range is from -40°C to 125°C. - What is the maximum sink current for the OUTA and OUTB pins?
The maximum sink current for the OUTA and OUTB pins is 500 mA. - How does the PGA460-Q1 process reflected echo signals?
The device processes reflected echo signals using an analog front-end (AFE) with a low-noise amplifier and a programmable time-varying gain stage feeding into an ADC, which is then processed by the DSP core. - What package type is the PGA460-Q1 available in?
The PGA460-Q1 is available in a TSSOP (16 pins) package.
