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LDC1000EVM: Which LDC series, in your expert opinion, is the most appropriate to develop a respiratory inductance belt prototype?

Vangelis Lympouridis
Prodigy 10 points
Part Number: LDC1000EVM

Great joining the E2E TI community!

We want to develop a respiratory inductance belt prototype using a thin copper coil stretched around the chest (as found in typical Respiratory Inductive Plethysmography, RIP belt designs).

We have been studying the documentation of the LDC series and the evaluation boards and have also found the LDC device selection guide (https://www.ti.com/lit/an/snoa954d/snoa954d.pdf?ts=1696902893718&ref_url=https%253A%252F%252Fwww.google.com%252F) that covers series LDC0xxx/LDC1xxx/LDC2xxx/LDC3xxx.

Our understanding is that previous designs of RIP belts used the LDC1xxx chips (https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/320331/ldc1000-respiratory-monitoring-application-troubleshooting) but we wanted to make sure if that was because the other series came later and with more advanced features or if the other series are more specifically designed for proximity/touch induction applications.

To summarize: Which LDC series, in your expert opinion, is the most appropriate to develop a respiratory inductance belt prototype?

Thank you in advance

  • 0
    TI__Mastermind 42530 points

    Hello Vangelis,

    Can you provide some details on what type of measurements and requirements you have for this application?  Does this require an Rp + L measurement or can you work with L only?  If you are using Rp + L, the LDC1000 is the correct device.  If you only require L measurements, we have other devices that may work well such as the LDC131x and LDC161x.  

  • 0 in reply to Eddie LaCost
    Prodigy 10 points

    Thank you Eddie, that clarifies a key difference. We will go ahead and start our dev with the LDC161x series as it is a newer device. In another thread we noticed another recommendation that LDC1000 is not recommended for new devices. thanks again