About MAX4466 and MAX4468 datasheet schmatic question!

Question

Hello, I have a question. According to the specification sheet, MAX4466 and MAX4468 are both in the same specification sheet. However, from the schematic diagram, MAX4466 takes the input signal from the IN+ pin, while MAX4468 takes the input signal from the IN- pin. Does this indicate that they are not the same type of amplifier?

MikeNunnery · Answer

All of the products in this family are effectively Op-Amps which require negative feedback to function. With op-amps you can use them in either inverting, or non-inverting configuration. Connecting the incoming mic signal to IN+ will result in a non-inverting gain. Connecting the incoming MIC signal to the IN- input will result in an inverting gain. This should be easily researchable online. 
 Both the MAX4466 and MAX4468 are minimum gain stable of 5V/V. This allows greater maximum bandwidth, but you cannot use a gain lower than 5V/V. 
 The only difference is that the MAX4468 includes a MIC_BIAS and a Shutdown pin and the MAX4466 does not.

Peterwu5713 · Answer

I plan to use the MAX4468 for the preamplification of the MIC. The MIC model is Knowles FG-23652-P16. Since the MIC has three input lines, could you please help me check if this circuit connection is correct? Also, I need to increase the default gain. Can I adjust the resistance values of R18 and R19 to achieve this?

SLA Status	Assignee	Support Status
SLA Closed. Met after 4 hours	MikeNunnery	Closed

Popular Forums

Product Forums

Application Forums

Design Center Forums

Highlighted Webinar

Places

Libraries

Challenge Yourself!

What's Brewing

Places

Resources

Visit ContentZone

The Latest Read

New Release

Recent Technical Insights

SLA Information

Products Mentioned

Thread Details

About MAX4466 and MAX4468 datasheet schmatic question!

Before You Switch