TDC1000QPWRQ1 - Automotive Ultrasonic AFE | Texas Instruments
料号： TDC1000QPWRQ1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 |
TDC1000QPWRQ1 概述
An ultrasonic sensing analog front end is a specialized integrated circuit that interfaces between a microcontroller and an ultrasonic transducer. It generates the excitation pulses to drive the transducer, amplifies the returning echo signal, and converts the time-of-flight into a digital value. This enables precise distance, level, or flow measurements. The TDC1000-Q1 belongs to the family of ultrasonic sensing AFEs, which are part of the broader category of sensor signal conditioning ICs within the analog front end product group.
Key features of the TDC1000QPWRQ1 include a programmable transmit frequency up to 1 MHz, a receive amplifier with adjustable gain, and a time-to-digital converter with a resolution of 10 ps. It supports multiple transducer configurations and includes an internal temperature sensor for compensation. The device is AEC-Q100 qualified for automotive applications, ensuring reliability under extreme conditions.
Technically, the TDC1000-Q1 uses a time-to-digital conversion architecture that measures the round-trip time of an ultrasonic pulse. This approach provides high accuracy and immunity to amplitude variations. The device includes a low-noise amplifier (LNA) with a programmable gain range, a band-pass filter, and a comparator to detect the echo. The digital output is a 16-bit time measurement that can be read via an SPI interface.
Typical applications include automotive fuel level sensing, washer fluid level detection, and industrial tank level monitoring. The device is also used in concentration sensing for urea or diesel exhaust fluid (DEF) in vehicles. Its automotive qualification and wide temperature range make it ideal for under-hood and chassis-mounted sensors.
When designing with the TDC1000QPWRQ1, ensure proper decoupling of the power supply and careful layout of the transducer connections to minimize noise. The SPI interface should be isolated from high-current traces to avoid interference. Refer to the TIDA-00322 reference design for a complete automotive ultrasonic fluid level sensing solution.
直接替换替代料： TDC1000QPWRQ1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
TDC1000QPWQ1
✅ 直接替换📋 参考替代料（不在目录中）
TDC1000PWR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TDC1000PW
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX35101
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TDC1000QPWRQ1 规格参数
| Type | Ultrasonic Sensing Analog Front End |
| Number of Channels | 1 |
| 电源电压 | 2.7 V to 5.5 V |
| 工作温度范围 | -40°C to 125°C |
| 封装 | TSSOP-28 (PW) |
| 安装类型 | Surface Mount |
| 接口 | 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 |
| 内部温度传感器 | Yes |
| Automotive Qualification | AEC-Q100 |
| RoHS 状态 | Compliant |
| 引脚数 | 28 |
| 输出类型 | Digital (SPI) |
TDC1000QPWRQ1 引脚配置
| 引脚 1 | VIN — Power supply input |
| 引脚 2 | GND — Ground |
| 引脚 3 | TX — Transmit pulse output |
| 引脚 4 | RX — Receive echo input |
| 引脚 5 | CLK — Clock input |
| 引脚 6 | CS — Chip select (SPI) |
| 引脚 7 | SCLK — SPI clock |
| 引脚 8 | SDI — SPI data input |
| 引脚 9 | SDO — SPI data output |
| 引脚 10 | INT — Interrupt output |
| 引脚 11 | TEMP — Temperature sensor output |
| 引脚 12 | VIO — I/O supply voltage |
| 引脚 13 | AVDD — Analog supply |
| 引脚 14 | DVDD — Digital supply |
典型应用
TDC1000QPWRQ1 适用于 6 应用s: 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 -40°C to 125°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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： TDC1000QPWRQ1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 85°C |
关键差异点
- Automotive AEC-Q100 qualification （对比 TDC1000PWR)
- Wide supply voltage range （对比 MAX35101)
- Extended temperature range （对比 MAX35101)
设计说明
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.
合规信息
AEC-Q100 qualified per TI product page. RoHS compliant. Lead-free.
