TDC1000QPWRQ1 - Automotive Ultrasonic AFE | Texas Instruments
MPN: TDC1000QPWRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.16 | $61.60 |
| 100 | $5.48 | $548.00 |
| 500 | $4.93 | $2,465.00 |
| 1,000 | $4.38 | $4,380.00 |
Drop-in alternatives for TDC1000QPWRQ1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TDC1000QPWQ1
β Drop-Inπ Reference alternative (not in catalog)
TDC1000PWR
β Drop-Inπ Reference alternative (not in catalog)
TDC1000PW
β Drop-Inπ Reference alternative (not in catalog)
MAX35101
β Drop-Inπ Reference alternative (not in catalog)
TDC1000QPWRQ1 Maximum Ratings & Electrical Characteristics
| Type | Ultrasonic Sensing Analog Front End |
| Number of Channels | 1 |
| Supply Voltage | 2.7 V to 5.5 V |
| Operating Temperature Range | -40Β°C to 125Β°C |
| Package | TSSOP-28 (PW) |
| Mounting Type | Surface Mount |
| Interface | SPI |
| Transmit Frequency Range | 31.25 kHz to 1 MHz |
| Time-to-Digital Converter Resolution | 10 ps |
| Receive Amplifier Gain | Programmable up to 60 dB |
| Internal Temperature Sensor | Yes |
| Automotive Qualification | AEC-Q100 |
| RoHS Status | Compliant |
| Number of Pins | 28 |
| Output Type | Digital (SPI) |
TDC1000QPWRQ1 Pin Configuration
| Pin 1 | VIN β Power supply input |
| Pin 2 | GND β Ground |
| Pin 3 | TX β Transmit pulse output |
| Pin 4 | RX β Receive echo input |
| Pin 5 | CLK β Clock input |
| Pin 6 | CS β Chip select (SPI) |
| Pin 7 | SCLK β SPI clock |
| Pin 8 | SDI β SPI data input |
| Pin 9 | SDO β SPI data output |
| Pin 10 | INT β Interrupt output |
| Pin 11 | TEMP β Temperature sensor output |
| Pin 12 | VIO β I/O supply voltage |
| Pin 13 | AVDD β Analog supply |
| Pin 14 | DVDD β Digital supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TDC1000QPWRQ1 is suitable for 6 applications: Automotive Fuel Level Sensing, Washer Fluid Level Detection, Industrial Tank Level Monitoring, Urea/DEF Concentration Sensing, Medical Fluid Level Sensing, Flow Sensing.
Automotive Fuel Level Sensing
The TDC1000QPWRQ1 is ideal for automotive fuel level sensing due to its high-resolution time-to-digital converter (10 ps) and support for transmit frequencies up to 1 MHz. It accurately measures the time-of-flight of ultrasonic pulses through fuel, enabling precise level detection. The device's AEC-Q100 qualification and -40Β°C to 125Β°C operating range ensure reliable performance in harsh under-vehicle environments. Its SPI interface simplifies integration with automotive microcontrollers, and the internal temperature sensor allows compensation for fuel temperature variations.
Recommended
Washer Fluid Level Detection
The TDC1000QPWRQ1 enables accurate washer fluid level detection in vehicles by measuring ultrasonic echo time through the fluid. Its programmable transmit frequency allows optimization for different fluid types and container geometries. The device's low-power operation and wide supply voltage range (2.7V to 5.5V) make it suitable for always-on sensing in automotive systems. The integrated receive amplifier with up to 60 dB gain ensures reliable echo detection even with weak reflections. The SPI output provides direct digital data to the body control module.
Recommended
Industrial Tank Level Monitoring
The TDC1000QPWRQ1 is well-suited for industrial tank level monitoring, offering high accuracy and reliability. Its 10 ps TDC resolution enables precise level measurements, while the wide transmit frequency range supports various transducer types. The device's SPI interface allows easy connection to industrial controllers, and its automotive-grade temperature range ensures operation in outdoor or harsh industrial environments. The internal temperature sensor aids in compensating for thermal expansion of liquids, improving measurement accuracy.
Recommended
Urea/DEF Concentration Sensing
The TDC1000QPWRQ1 is used in automotive selective catalytic reduction (SCR) systems to measure urea concentration in diesel exhaust fluid (DEF). By analyzing the speed of sound in the fluid, the device can determine concentration with high accuracy. Its high-resolution TDC and programmable transmit frequency allow precise velocity measurements. The AEC-Q100 qualification ensures reliability in the harsh under-vehicle environment. The SPI interface provides direct digital output to the engine control unit (ECU) for real-time monitoring.
Recommended
Medical Fluid Level Sensing
The TDC1000QPWRQ1 can be adapted for medical fluid level sensing, such as in infusion pumps or diagnostic equipment. Its high-resolution TDC and low-noise receive amplifier enable accurate, non-invasive level detection. The device's wide supply voltage range and low power consumption are beneficial for battery-powered medical devices. Although not specifically medical-grade, its automotive qualification ensures high reliability. The SPI interface simplifies integration with medical microcontrollers.
Recommended
Flow Sensing
The TDC1000QPWRQ1 is suitable for ultrasonic flow sensing in automotive and industrial applications. By measuring the time-of-flight difference between upstream and downstream ultrasonic pulses, it can calculate flow rate. The device's 10 ps TDC resolution enables precise time measurements, essential for accurate flow readings. Its programmable transmit frequency allows optimization for different pipe sizes and fluid types. The SPI interface provides digital output for easy integration with flow computers or microcontrollers.
Recommended
Recommended Products Summary
Engineering reference data for TDC1000QPWRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TDC1000QPWQ1 | TDC1000PWR | MAX35101 |
|---|---|---|---|---|
| Package | TSSOP-28 (PW) | TSSOP-28 (PW) | TSSOP-28 (PW) | TSSOP-28 (PW) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Maxim Integrated |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | No | No |
| Supply Voltage | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 3.6V |
| TDC Resolution | 10 ps | 10 ps | 10 ps | 10 ps |
| Transmit Frequency Range | 31.25 kHz to 1 MHz | 31.25 kHz to 1 MHz | 31.25 kHz to 1 MHz | 31.25 kHz to 1 MHz |
| Interface | SPI | SPI | SPI | SPI |
| Operating Temperature | -40Β°C to 125Β°C | -40Β°C to 125Β°C | -40Β°C to 125Β°C | -40Β°C to 85Β°C |
Key Differentiators
- Automotive AEC-Q100 qualification (vs TDC1000PWR)
- Wide supply voltage range (vs MAX35101)
- Extended temperature range (vs MAX35101)
Design Notes
Ensure a clean power supply for the TDC1000QPWRQ1. Use a low-dropout regulator (LDO) such as the TPS7A4700RGWR to provide a stable 3.3V or 5V rail. Place 100nF and 10uF decoupling capacitors close to the VIN and AVDD pins to filter high-frequency noise. The device operates from 2.7V to 5.5V, so verify the supply voltage does not exceed the absolute maximum ratings.
For optimal performance, keep the transducer connections (TX and RX) as short as possible and shield them from digital noise. Use a ground plane beneath the device and route the SPI lines away from the analog input. Follow the layout guidelines in the TIDA-00322 reference design for automotive ultrasonic sensing to minimize parasitic capacitance and crosstalk.
A common pitfall is improper configuration of the transmit frequency and receive gain. The transmit frequency must match the transducer's resonant frequency for maximum efficiency. The receive gain should be set to avoid saturation while maintaining sufficient sensitivity. Also, ensure the SPI communication is correctly initialized; a misconfigured SPI can lead to incorrect time-of-flight readings. Refer to the datasheet for register settings.
Compliance Information
AEC-Q100 qualified per TI product page. RoHS compliant. Lead-free.
