The TI E2E™ design support forums will undergo maintenance from Sept. 28 to Oct. 2. If you need design support during this time, contact your TI representative or open a new support request with our customer support center.

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MSP430FR60471: Using Analog Filter at the CH0IN and CH1IN

Part Number: MSP430FR60471
Other Parts Discussed in Thread: MSP430FR6047

Hi,

we are using MSP430FR6047 for Ultrasonic Sensing and borrowed the circuitry from MSP430FR6047EVM. To reduce noise further, we want to tweak the CH0IN and CH1IN circuitry, which is currently looks like this:

at J5 and J1, two transducers are connected.

I have few questions here:

1. What is the state of CH0OUT or CH1OUT when transducer signal is being acquired? (Is it kept at ground or high impedance)

2. Does it do impedance matching? How does this circuitry helps in the same?

Regards,

Kamlesh

**Attention** This is a public forum