S6E2H4 Datasheet, PDF (145/160 Pages) SPANSION – fpu built-in

S6E2H4 Series
Definition of 12-bit A/D Converter Terms
 Resolution:
Analog variation that is recognized by an A/D converter.
 Integral Nonlinearity:
Deviation of the line between the zero-transition point
(0b000000000000 ←→ 0b000000000001) and the full-scale transition point
(0b111111111110 ←→ 0b111111111111) from the actual conversion
characteristics.
 Differential Nonlinearity: Deviation from the ideal value of the input voltage that is required to
change the output code by 1 LSB.
Integral Nonlinearity
Differential Nonlinearity
0xFFF
Actual conversion
0xFFE ^{characteristics}
{1 LSB(N-1) + VZT}
0xFFD
0x004
0x003
VFST
(Actually-
measured
value)
VNT
(Actually-measured
value)
Actual conversion
0x002
characteristics
Ideal characteristics
0x001
VZT (Actually-measured value)
0x(N+1) ^{Actual conversion}
characteristics
Ideal characteristics
0xN
0x(N-1)
0x(N-2)
V(N+1)T
(Actually-measured
value)
VNT
(Actually-measured
value)
Actual conversion characteristics
AVss
Analog input
AVRH
AVss
Analog input
AVRH
Integral Nonlinearity of digital output N =
VNT - {1LSB × (N - 1) + VZT}
1LSB
[LSB]
Differential Nonlinearity of digital output N =
V(N + 1) T - VNT
1LSB
- 1 [LSB]
1LSB =
VFST - VZT
4094
N:
VZT:
VFST:
VNT:
A/D converter digital output value.
Voltage at which the digital output changes from 0x000 to 0x001.
Voltage at which the digital output changes from 0xFFE to 0xFFF.
Voltage at which the digital output changes from 0x(N − 1) to 0xN.
Document Number: 001-98941 Rev.*B
Page 145 of 160