Overview
The TDC7200PWR is a Time-to-Digital Converter (TDC) developed by Texas Instruments, designed for ultrasonic sensing measurements. This device is particularly suited for applications such as water flow meters, gas flow meters, and heat flow meters. When paired with the TDC1000 (ultrasonic analog-front-end), the TDC7200PWR can be part of a comprehensive TI ultrasonic sensing solution that includes the MSP430 microcontroller, power management, wireless connectivity, and supporting source code. The TDC7200PWR functions as a precise stopwatch, measuring the elapsed time (time-of-flight or TOF) between a START pulse and up to five STOP pulses, offering high accuracy and flexibility in selecting the best echo performance.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 14-TSSOP (PW) |
| Pins | 14 |
| Operating Temperature Range | -40°C to 85°C |
| Resolution | 55 ps |
| Standard Deviation | 35 ps |
| Measurement Range (Mode 1) | 12 ns to 500 ns |
| Measurement Range (Mode 2) | 250 ns to 8 ms |
| Low Power Consumption | 0.5 µA (2 SPS) |
| Supply Voltage | 2 V to 3.6 V |
| Supply Current | 1.35 mA |
| Interface | SPI Host Interface |
| Mounting Style | Surface Mount |
Key Features
- High resolution of 55 ps and standard deviation of 35 ps, ensuring precise time-to-digital conversion.
- Supports up to five STOP signals, allowing flexibility in selecting the best echo performance.
- Autonomous Multi-Cycle Averaging Mode for optimized low system power consumption, ideal for battery-powered devices.
- Internal self-calibrated time base compensates for drift over time and temperature, ensuring high accuracy.
- Low power consumption of 0.5 µA at 2 samples per second (SPS).
- SPI host interface for configuration and register access.
Applications
- Ultrasonic flow meters for water, gas, and heat measurement.
- LIDAR and other time-of-flight applications.
- Battery-powered flow meters due to its low power consumption features.
- Part of a complete TI ultrasonic sensing solution including the TDC1000, MSP430, power management, and wireless connectivity.
Q & A
- What is the primary function of the TDC7200PWR?
The TDC7200PWR is a Time-to-Digital Converter that measures the elapsed time (time-of-flight or TOF) between a START pulse and up to five STOP pulses. - What are the key applications of the TDC7200PWR?
The TDC7200PWR is used in ultrasonic flow meters for water, gas, and heat measurement, as well as in LIDAR and other time-of-flight applications. - What is the resolution of the TDC7200PWR?
The resolution of the TDC7200PWR is 55 ps. - What is the standard deviation of the TDC7200PWR?
The standard deviation of the TDC7200PWR is 35 ps. - What are the measurement ranges of the TDC7200PWR?
The measurement ranges are 12 ns to 500 ns in Mode 1 and 250 ns to 8 ms in Mode 2. - How does the TDC7200PWR manage power consumption?
The TDC7200PWR has an Autonomous Multi-Cycle Averaging Mode that optimizes low system power consumption, making it suitable for battery-powered devices. - What is the supply voltage range of the TDC7200PWR?
The supply voltage range is from 2 V to 3.6 V. - What interface does the TDC7200PWR use for configuration and register access?
The TDC7200PWR uses an SPI host interface. - What is the operating temperature range of the TDC7200PWR?
The operating temperature range is from -40°C to 85°C. - Is the TDC7200PWR RoHS compliant?
Yes, the TDC7200PWR is RoHS compliant.
