S6E2H Datasheet, PDF (148/163 Pages) Cypress Semiconductor – 32-bit ARM ® Cortex ® -M4F FM4 Microcontroller

S6E2H 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: .......... A/D converter digital output value.
VZT: Voltage at which the digital output changes from 0x000 to 0x001.
VFST: Voltage at which the digital output changes from 0xFFE to 0xFFF.
VNT: Voltage at which the digital output changes from 0x(N − 1) to 0xN.
Document Number: 001-98943 Rev *C
Page 148 of 163