What are the advantages/disadvantages of a charge mode accelerometer vs. an IEPE type?
An IEPE accelerometer will have a high pass filter at about 5Hz. The charge type will have a high pass filter at about 0.1Hz. The charge type will usually have a lower measurement bandwidth than the IEPE. Charge accelerometers can be used at higher temperatures.
The high pass filter, in both cases, is built in and isn’t adjustable.
Another accelerometer type to consider is a bridge based one. This type will measure right down to DC. A bridge based accelerometer is based on the Wheatstone bridge (as used in strain gauges). Some bridge based accelerometers are based on strain gauges, but not many. Usually they are capacitive in nature.