TDC1000

• Automotive AEC-Q100 (TDC1000-Q1)
• Measurement Range: Up to 8 ms
• Operating Current: 1.8 µA (2 SPS)
• Transmitter Channels TX1/TX2:
  • Supports Single or Dual-Transducer
    Application
  • Programmable Excitation: 31.25 kHz to 4 MHz,
    Up to 31 Pulses
• Receiver Channels RX1/RX2:
  • STOP Cycle-to-Cycle Jitter: 50 ps_RMS
  • Low-Noise and Programmable Gain Amplifiers
  • Access to Signal Chain for External Filter
    Design
  • Programmable Threshold Comparator for Echo
    Qualification
  • Automatic Channel Swapping for Differential
    Time-of-Flight (TOF) Measurement
  • Programmable Low Power Mode for Long TOF
    Measurements
• Temperature Measurement
  • Interface to Two PT1000/500 RTDs
  • RTD-to-RTD Matching Accuracy 0.02°C_RMS
• Operating Temperature Range: –40°C to 125°C

The TDC1000 is a fully integrated analog front-end (AFE) for ultrasonic sensing measurements of level, fluid identification/concentration, flow, and proximity/ distance applications common in automotive, industrial, medical, and consumer markets. When paired with an MSP430/C2000 MCU, power, wireless, and source code, TI provides the complete ultrasonic sensing solution.

TI's Ultrasonic AFE offers programmability and flexibility to accommodate a wide-range of applications and end equipment. The TDC1000 can be configured for multiple transmit pulses and frequencies, gain, and signal thresholds for use with a wide-range of transducer frequencies (31.25kHz to 4MHz) and Q-factors. Similarly, the programmability of the receive path allows ultrasonic waves to be detected over a wider range of distances/tank sizes and through various mediums.

Selecting different modes of operation, the TDC1000 can be optimized for low power consumption, making it ideal for battery powered flow meters, level instrumentation, and distance/proximity measurements. The low noise amplifiers and comparators provide extremely low jitter, enabling picosecond resolution and accuracy for zero and low flow measurements.