MCP3422_SRATE_3
if (sample_rate == MCP3422_SRATE_3) {
temp = MCP3422_SRATE_3;
[MCP3422_SRATE_3] = 1000 / 3 };
[MCP3422_SRATE_3] = 3 };
[MCP3422_SRATE_3] = 17 };