MAX1221 datasheet(9/44 Pages) MAXIM

Part #	MAX1221

Description	12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

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Manufacturer	MAXIM [Maxim Integrated Products]

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9 / 44 page

12-Bit, Multichannel ADCs/DACs with FIFO,

Temperature Sensing, and GPIO Ports

_______________________________________________________________________________________

9

Typical Operating Characteristics (continued)

(AVDD = DVDD = 3V external VREF = 2.5V, fCLK = 3.6MHz (50% duty cycle), fSAMPLE = 225ksps, CLOAD = 50pF, 0.1µF capacitor at

REF, TA = +25°C, unless otherwise noted.)

ADC INTEGRAL NONLINEARITY

vs. OUTPUT CODE

OUTPUT CODE

3072

2048

1024

-0.75

-0.50

-0.25

0

0.25

0.50

0.75

1.00

-1.00

0

4096

ADC DIFFERENTIAL NONLINEARITY

vs. OUTPUT CODE

OUTPUT CODE

3072

2048

1024

-0.75

-0.50

-0.25

0

0.25

0.50

0.75

1.00

-1.00

0

4096

AVDD = DVDD = 5V

EXTERNAL REFERENCE = 4.096V

ADC DIFFERENTIAL NONLINEARITY

vs. OUTPUT CODE

OUTPUT CODE

3072

2048

1024

-0.75

-0.50

-0.25

0

0.25

0.50

0.75

1.00

-1.00

0

4096

0

0.2

0.6

0.4

0.8

1.0

2.5

3.5

3.0

4.0

4.5

5.0

5.5

ADC OFFSET ERROR

vs. ANALOG SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

ADC OFFSET ERROR vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

-1

0

1

2

-2

-40

85

1.0

0.5

0

-0.5

-1.0

2.5

4.0

3.0

3.5

4.5

5.0

5.5

ADC GAIN ERROR

vs. ANALOG SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

ADC GAIN ERROR vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

-1

0

1

2

-2

-40

85

ADC EXTERNAL REFERENCE

INPUT CURRENT vs. SAMPLING RATE

SAMPLING RATE (ksps)

250

200

150

100

50

10

20

30

40

50

60

0

300

ANALOG SUPPLY CURRENT

vs. SAMPLING RATE

SAMPLING RATE (ksps)

250

200

150

100

50

0.5

1.0

1.5

2.0

2.5

3.0

0

300

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