They are pin-to-pin compatible. But one thing need to be careful is that there
is an internal 37.5K ohm gain setting resistor in SSM2311 while other devices
do not have. So the gain of SSM2311 is 300K/(37.5K + Rextern). The gain of
other devices is 2* 150K/Rextern = 300K/Rextern. So the gain is different if
using the same external resistor.