For the LM4861, can you advise what is VIH min, and VIL max in relation to Vdd. I do not see the specified in the datasheet.
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.
For the LM4861, can you advise what is VIH min, and VIL max in relation to Vdd. I do not see the specified in the datasheet.
HI Ivan;
Please let me know when you confirm CMOS or TTL input, as the customer's VDD is +5V and he has designed with a 1.8V logic level and needs to confirm the Vih/Vil levels.
I ordered a sample of the LM4861 and configured it per the typical audio amplifier application circuit in Figure 2 on page 2 of the datasheet.
The threshold of the SHUTDOWN pin input is Vdd/2. Levels above Vdd/2 will result in the amp entering Shutdown mode. The shutdown feature turns the amplifier off when a logic high is placed on the
shutdown pin.
With a VDD=5V, the Shutdown goes active above 2.5V, and goes in-active below 2.5V.
With a VDD=4V, the Shutdown goes active above 2.0V, and goes in-active below 2.0V.
With a VDD=3.3V, the Shutdown goes active above 1.65V, and goes in-active below 1.65V.
With a VDD=3V, the Shutdown goes active above 1.5V, and goes in-active below 1.5V.
Can you confirm this is the desired operation?