S6E2C2 Datasheet, PDF (187/207 Pages) Cypress Semiconductor – 32-bit ARM® Cortex®-M4F FM4 Microcontroller

S6E2C2 Series
Definition of 12-bit A/D Converter Terms
 Resolution:
Integral Nonlinearity:
Differential Nonlinearity:
Analog variation that is recognized by an A/D converter.
Deviation of the line between the zero-transition point
(0b000000000000 ←→ 0b000000000001) and the full-scale transition point
(0b111111111110 ←→ 0b111111111111) from the actual conversion characteristics.
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
VFST
(Actually-
measured
0x004
value)
VNT
(Actually-measured
0x003
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 =
V_NT - {1LSB × (N - 1) + V_ZT}
1LSB
[LSB]
Differential Nonlinearity of digital output N =
V_{(N + 1) T} - V_NT
1LSB
- 1 [LSB]
1LSB =
V_FST - V_ZT
4094
N:
V_ZT:
V_FST:
V_NT:
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: 002-05030 Rev.*A
Page 187 of 207