TDC1000 - 2 mhz ceramic

Mubasshir Helal

Other Parts Discussed in Thread: TDC1000Part Number: TDC1000

Application: Divider and NUM_TX for 2 Mhz Ceramic

Question type: Development and troubleshooting

Description of the problem: I have a 2 MHz ceramic. What should I set the TX_FREQ_DIV & NUM_TX to to get the correct resonant frequency

over 8 years ago

0 Vishy Viswanathan over 8 years ago

TI__Mastermind 21685 points

Assuming you are using the TDC1000-TDC7200EVM with 8MHz clock input for TDC1000, you can select TX_FREQ_DIV as "Divide_by_4" so you get 2MHz resonant freq for your transducer. NUM_TX selects the number of excitation pulses you want to apply on the transducer and doesn't affect the resonant frequency. Higher the number of pulses you apply, more the ultrasonic energy that is transmitted into the medium and better the echo you receive.
Thanks,
Vishy

0 Mubasshir Helal over 8 years ago in reply to Vishy Viswanathan

Prodigy 145 points

On this image could you tell me which ports I should connect 2 transducers for water flow sensing. I believe the correct mode on the GUI is mode 2?

0 Vishy Viswanathan over 8 years ago in reply to Mubasshir Helal

TI__Mastermind 21685 points

Please check this app note for flow sensing with TDC1000

www.ti.com/.../snia020

Also, check this link for some additional material and guidance

e2e.ti.com/.../1624680

Thanks,
Vishy

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TDC1000 - 2 mhz ceramic