Q:
Why does MAX1978EVKIT datasheet suggests a min operating temperature of 0 deg. C while the MAX1978 datasheet suggests a min operating temperature of -40 deg. C?
A:
Maxim's evaluation kits are generally specified for the commercial temperature range 0C to +70C, even if the Maxim device is rated for a wider temperature range. In the case of the MAX1978EVKIT, the installed MAX1978 device is specified for -40C to +85C. Additionally, the bill of materials components used in the MAX1978EVKIT should be able to work down to -40C. Therefore, the MAX1978EVKIT should work down to -40C.