Actel Fusion Mixed-Signal FPGAs
Gain Error
The gain error of an ADC indicates how well the slope of an actual transfer function matches the
slope of the ideal transfer function. Gain error is usually expressed in LSB or as a percent of full-
scale (%FSR). Gain error is the full-scale error minus the offset error (Figure 2-85).
Gain = 2 LSB
1...11
Ideal Output
Actual Output
0...00
Input Voltage to Prescaler
Figure 2-85 • Gain Error
Gain Error Drift
Gain-error drift is the variation in gain error due to a change in ambient temperature, typically
expressed in ppm/°C.
Preliminary v1.7
2-111
ACTEL [ Actel Corporation ]
