Datasheet

MAX1221/MAX1223/MAX1343
12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
_______________________________________________________________________________________ 9
Typical Operating Characteristics (continued)
(AV
DD
= DV
DD
= 3V external V
REF
= 2.5V, f
CLK
= 3.6MHz (50% duty cycle), f
SAMPLE
= 225ksps, C
LOAD
= 50pF, 0.1µF capacitor at
REF, T
A
= +25°C, unless otherwise noted.)
ADC INTEGRAL NONLINEARITY
vs. OUTPUT CODE
MAX1221 toc04
OUTPUT CODE
INTEGRAL NONLINEARITY (LSB)
307220481024
-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
MAX1221 toc05
OUTPUT CODE
DIFFERENTIAL NONLINEARITY (LSB)
307220481024
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
-1.00
0 4096
AV
DD
= DV
DD
= 5V
EXTERNAL REFERENCE = 4.096V
ADC DIFFERENTIAL NONLINEARITY
vs. OUTPUT CODE
MAX1221 toc06
OUTPUT CODE
DIFFERENTIAL NONLINEARITY (LSB)
307220481024
-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 3.53.0 4.0 4.5 5.0 5.5
ADC OFFSET ERROR
vs. ANALOG SUPPLY VOLTAGE
MAX1221 toc07
SUPPLY VOLTAGE (V)
OFFSET ERROR (LSB)
ADC OFFSET ERROR vs. TEMPERATURE
MAX1221 toc08
TEMPERATURE (°C)
OFFSET ERROR (LSB)
603510-15
-1
0
1
2
-2
-40 85
1.0
0.5
0
-0.5
-1.0
2.5 4.03.0 3.5 4.5 5.0 5.5
ADC GAIN ERROR
vs. ANALOG SUPPLY VOLTAGE
MAX1221 toc09
SUPPLY VOLTAGE (V)
GAIN ERROR (LSB)
ADC GAIN ERROR vs. TEMPERATURE
MAX1221 toc10
TEMPERATURE (°C)
GAIN ERROR (LSB)
603510-15
-1
0
1
2
-2
-40 85
ADC EXTERNAL REFERENCE
INPUT CURRENT vs. SAMPLING RATE
MAX1221 toc11
SAMPLING RATE (ksps)
ADC EXTERNAL REFERENCE INPUT CURRENT (μA)
25020015010050
10
20
30
40
50
60
0
0 300
ANALOG SUPPLY CURRENT
vs. SAMPLING RATE
MAX1221 toc12
SAMPLING RATE (ksps)
ANALOG SUPPLY CURRENT (mA)
25020015010050
0.5
1.0
1.5
2.0
2.5
3.0
0
0 300