TLV9164-Q1: questions

Hey Adam,

I don't think that the image attached properly, could you please try again?

I will answer the first four bullets when the schematic is posted.

For terminating the unused channel, there are several pieces of content on this:

https://www.ti.com/lit/an/sboa204a/sboa204a.pdf

https://e2e.ti.com/blogs_/archives/b/thesignal/posts/the-unused-op-amp-what-to-do

https://www.ti.com/lit/an/sloa277b/sloa277b.pdf (Section 7)

Best,
Jerry

Thanks Jerry,

Here was the image

Hey Adam,

• Does need a 10K-ohm resistor from a Non-Inverting Input to a Voltage (ex, 5.25V) ?
  • If you expect a voltage above V+, a resistor between Vin and IN+ should be added to limit current into the amplifier below 10mA
• Does need a resistor from an Inverting input to output of OpAmp or no need ? (if need, what resistor value is suggested, such as for hysteresis,.) ?
  • A resistor in the feedback network is only necessary if you need gain. Then you will need a feedback and a gain resistor. Hysteresis is a comparator specification, this is an operational amplifier

Please specify which PN you are using for MSP430 so I can answer the below questions

• Does need a capacitor at the output of OpAmp to input of MSP430 ADC channel ? (If need, what capacitor value is suggested ?)
• Is MSP430 ADC input high impedance which no need a buffer after OpAmp?

Best,
Jerry