Datasheet

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SBAS317E − APRIL 2004 − REVISED MAY 2006
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22
OVERVIEW
The MSC120x ADC structure is shown in Figure 7. The figure lists the components that make up the ADC, along with the
corresponding special function register (SFR) associated with each component.
Σ
Σ
X
Input
Multiplexer
MSC1200
Only
Temperature
Sensor
Buffer PGA
Sample
and Hold
ADMUXD7h
REFIN+
REFIN
−
REFIN+ f
MOD
REFIN
−
ADCON1DDh
ADCON2DEh
ADCON3DFh
AIPOL.5A4h
AIE.5A6h
OCR GCR ADRES
SUMR
D3h
D2h D1h D6h D5h D4h DBh
(1)
DAh D9h
E5h
E4h E3h E2h
Offset
Calibration
Register
ADCON0DCh ACLKF6h
SSCON
E1h
ODACE6h
Offset
DAC
∆Σ
ADC
Modulator
FAST
SINC2
SINC3
AUTO
ADC
Result Register
Σ
Summation
Block
V
IN
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AINCOM
f
SAMP
f
DATA
Gain
Calibration
Register
Burnout
Detect
AV
DD
In+
AGND
In
−
Burnout
Detect
NOTE: (1) For the MSC1202, this register is sign−extended (Bipolar mode) or zero−padded
(Unipolar mode) for the 16−bit result in registers DAh and D9h.
AIPOL.6A4h
AIE.6A6h
AISTAT.5A7h AISTAT.6A7h
Figure 7. MSC120x ADC Structure