The following document describes signal conditioning circuits for Piezeoelectric sensors. I was interested in knowing which model should I use when designing signal conditioning circuit for piezelectric sensor.
If you can limit the load capacitance of the cable and amplifier, you can use the voltage model. This requires that no cable is involved as cables tend to add 20~30 pF/ft.
Otherwise the charge model must be used and a charge amplifier is required. This is how accelerometers work with cables from sensor to amp.
You can find some advantages and disadvantages of the approaches here:
Note that if you use the charge amplifier, then the cable capacitance does not impact the low frequency corner. For me, this is the big difference between the two styles. If a more stable low frequency corner is important, and you have cabling issues to deal with (particularly when there may be cable motion), then in many cases a charge amplifier is the way to go.