ATSAM3U1C View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATSAM3U1C

AT91SAM ARM-based Flash MCU

Atmel Corporation 

SAM3U Series

Table 43-34. Ge, Oe, 12-bit mode, VDDIN supply voltage conditions, Temperature range [-40°, +100°], FADC=2 MHz,

IBCTL=01.(1)

Parameter

Conditions

Min

Typ

Max

Units

Gain error (Ge)

VDDIN 2.4V to <3.6V

Differential, DIFF=1, OFF=x, GAIN=xx

-1.56

-0.56

+0.29

%

-64

-23

+12

LSB

Gain error (Ge)

VDDIN 2.4V to <3.6V

-1.56

-0.56

+0.78

%

Single ended, DIFF=0, OFF=x, GAIN=xx

-64

-23

+32

LSB

Offset error (Oe)

VDDIN 2.4V to <3.6V

-30

Differential, DIFF=1, OFF=x, GAIN=xx

+64

LSB

Offset error (Oe)

x stand for digital 0 or 1

VDDIN 2.4V to <3.6V

-60

Single ended, DIFF=0, OFF=x, GAIN=xx

+80

LSB

(1) Offset and Gain errors are given without calibration. A software calibration can be done to reduce Gain and offset

errors.

Figure 43-10. Offset and Gain Definitions

Ya=actual adc codes

Ymax=4095

YaH

YiM=2047

YaL

Ya=Ga×Xi+Oe

Ga: actual gain

Ga=(YaH-YaL)/XiH

Ga=1+Ge(%)

Ge(%): gain error

Ge(lsb): Ge(%)×Xmax

0

Single Ended case:

Offset and Gain

definitions

Oe=actual offset

VL

XiL

ADVref/2

XiM=2047

VH ADVref

XiH Xmax=4095

Vin

Xi=ideal adc codes

6430F–ATARM–21-Feb-12

1131

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