TDC7200
- Resolution: 55 ps
- Standard Deviation: 35 ps
- Measurement Range:
- Mode 1: 12 ns to 500 ns
- Mode 2: 250 ns to 8 ms
- Low Power Consumption: 0.5 µA (2 SPS)
- Supports up to 5 STOP Signals
- Autonomous Multi-Cycle Averaging Mode for Low
Power Consumption - Supply Voltage: 2 V to 3.6 V
- Operating Temperature –40°C to 85°C
- SPI Host Interface for Configuration and Register
Access
The TDC7200 is a Time-to-Digital Converter (TDC) for ultrasonic sensing measurements such as water flow meter, gas flow meter, and heat flow meter. When paired with the TDC1000 (ultrasonic analog-front-end), the TDC7200 can be a part of a complete TI ultrasonic sensing solution that includes the MSP430, power, wireless, and source code.
The Time to Digital Converter (TDC) performs the function of a stopwatch and measures the elapsed time (time-of-flight or TOF) between a START pulse and up to five STOP pulses. The ability to measure from START to multiple STOPs gives users the flexibility to select which STOP pulse yields the best echo performance.
The device has an internal self-calibrated time base which compensates for drift over time and temperature. Self-calibration enables time-to-digital conversion accuracy in the order of picoseconds. This accuracy makes the TDC7200 ideal for flow meter applications, where zero and low flow measurements require high accuracy.
When placed in the Autonomous Multi-Cycle Averaging Mode, the TDC7200 can be optimized for low system power consumption, making it ideal for battery powered flow meters. In this mode, the host can go to sleep to save power, and it can wake up when interrupted by the TDC upon completion of the measurement sequence.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TDC7200 Time-to-Digital Converter for Time-of-Flight Applications in LIDAR, Magnetostrictive and Flow Meters datasheet (Rev. D) | PDF | HTML | 2016/3/7 | ||
| 應用說明 | Interleaved Short Time Measurements Using TDC7200 | 2015/10/30 | ||||
| 技術文章 | Time-of-flight measurements using high-performance time-to-digital converters | PDF | HTML | 2015/7/31 | |||
| 技術文章 | Why are flow meter manufacturers switching from mechanical to ultrasonic? | PDF | HTML | 2015/6/11 | |||
| 應用說明 | Measuring an RTD Sensor with the TDC1000 and TDC7200 for Ultrasonic Sensing | 2015/4/9 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
TDC7200EVM — TDC7200 評估模組
TDC7200EVM 是一款評估模組，可讓使用者評估 TDC7200 時間數位轉換器的操作和性能。計算飛行時間便是一個範例，不論是用於光達或超音波應用。TDC7200EVM 具有兩個用於啟動和停止脈衝的 SMA 連接器，該連接器連接至 MSP430 LaunchPad 評估套件以擷取資料。 EVM 配備簡單易用的圖形使用者介面 (GUI)，可修改暫存器和顯示資料。
TIDA-00663 — 光達脈衝飛時測距參考設計
TIDM-ULTRASONIC-FLOW-TDC — 使用時間轉數位轉換器進行超音波水錶設計
TIDM-ULTRASONIC-FLOW-TDC 是超音波流量計（水、瓦斯或熱能電表）的參考設計，搭載使用時間至數位轉換器和超低功率 MCU 建置的 LCD。解決方案具備最佳化的洩漏偵測、低功率以及尺寸小巧等特色，這些都是水表、熱能電表及瓦斯表應用的重要需求。此設計還包括適用於系統電源的高效率 DC-DC 轉換器。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| TSSOP (PW) | 14 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。