User's Manual

FLASH DATA RETENTION

WSM2400 contains internal flash (non-volatile memory) to store calibration results, unique ID,

configuration settings and software images. Flash retention over the operating temperature range. See

Electrical Characteristics and Absolute Maximum Ratings sections. Nondestructive storage above the

operating temperature range of –40°C to 85°C is possible; although, this may result in a degradation of

retention characteristics. The degradation in flash retention for temperatures >85°C can be

approximated by calculating the dimensionless acceleration factor using the following equation.

Figure 21. Equation

TUSE = is the specified temperature retention in °C

TSTRESS = actual storage temperature in °C

Example: Calculate the effect on retention when storing at a temperature of 105°C.

TSTRESS = 105°C

TUSE = 85°C

AF = 2.8

So the overall retention of the flash would be degraded by a factor of 2.8, reducing data retention from

20 years at 85°C to 7.1 years at 105°C.