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Enhanced Queued Analog-to-Digital Converter (EQADC)
MPC5644A Microcontroller Reference Manual, Rev. 6
1166
Freescale Semiconductor
25.7.6.3
Quantization Error Reduction During Calibration
shows how the ADC transfer curve changes due to the addition of two to the MAC output
during the calibration - see MAC output equation at
quantization error is reduced by half leading to an increase in accuracy.
Figure 25-99. Quantization error reduction during calibration
25.7.7
EQADC
versus QADC
This section describes how the EQADC upgrades the QADC functionality. The section also provides a
comparison between the EQADC and QADC in terms of their functionality. This section targets the users
0
1/2 LSB
LSB
Input
Voltage
Digital
Value
4
Error for ADC Transfer Curve
Shifted
Ideal Transfer Curve
Transfer Curve
0
Input
Voltage
- 4
2
Quantization
Error
- 2
(12-bit AD resolution)
(12-bit AD resolution)
1/
2 LSB
LS
B
(14-bit result)
Error for Shifted
Transfer Curve
ADC Transfer Curve
Summary of Contents for MPC5644A
Page 2: ...MPC5644A Microcontroller Reference Manual Rev 6 2 Freescale Semiconductor...
Page 24: ...MPC5644A Microcontroller Reference Manual Rev 6 24 Freescale Semiconductor...
Page 26: ...MPC5644A Microcontroller Reference Manual Rev 6 26 Freescale Semiconductor...
Page 52: ...Introduction MPC5644A Microcontroller Reference Manual Rev 6 52 Freescale Semiconductor...
Page 56: ...Memory Map MPC5644A Microcontroller Reference Manual Rev 6 56 Freescale Semiconductor...
Page 1228: ...Decimation Filter MPC5644A Microcontroller Reference Manual Rev 6 1228 Freescale Semiconductor...
Page 1440: ...FlexCAN Module MPC5644A Microcontroller Reference Manual Rev 6 1440 Freescale Semiconductor...