MAX1221 Datasheet, PDF (12/44 Pages) Maxim Integrated Products – 12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
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.)
DAC OUTPUT LOAD REGULATION
ADC IMD PLOT
ADC CROSSTALK PLOT
vs. OUTPUT CURRENT
0
0
2.08
f_CLK = 5.24288MHz
f_CLK = 5.24288MHz
AV_DD = DV_DD = 5V
-20
f_IN1 = 9.0kHz
-20
f_IN1 = 10.080kHz
2.07 EXTERNAL REFERENCE = 4.096V
f_IN2 = 11.0kHz
f_IN2 = 8.0801kHz
-40
A_IN = -6dBFS
-40
SNR = 72.00dBc
2.06
IMD = 82.99dBc
THD = 85.24dBc
-60
-60
ENOB = 11.65 BITS
2.05
-80
-80
2.04
-100
-100
2.03 SINKING
-120
-120
2.02
SOURCING
DAC OUTPUT = MIDSCALE
-140
-140
2.01
-160
0
-160
50
100
150
200
0
2.00
50
100
150
200
-30
0
30
60
90
ANALOG INPUT FREQUENCY (kHz)
ANALOG INPUT FREQUENCY (kHz)
OUTPUT CURRENT (mA)
DAC OUTPUT LOAD REGULATION
vs. OUTPUT CURRENT
1.29
DAC OUTPUT = MIDSCALE
1.28
1.27
1.26
1.25
1.24
SINKING
1.23
SOURCING
1.22
1.21
-30 -20 -10 0 10 20 30
OUTPUT CURRENT (mA)
GPIO OUTPUT VOLTAGE
vs. SOURCE CURRENT
3.0
GPIOA0, GPIOA1 OUTPUTS
2.5
2.0
1.5
GPIOC0, GPIOC1
OUTPUTS
1.0
0.5
0
0
20
40
60
80
100
SOURCE CURRENT (mA)
GPIO OUTPUT VOLTAGE
vs. SOURCE CURRENT
5
4
3
GPIOA0, AGPIOA1 OUTPUTS
2
GPIOC0, GPIOC1 OUTPUTS
1
0
0
1500
1200
AV_DD = DV_DD = 5V
EXTERNAL REFERENCE = 4.096V
20
40
60
80
100
SOURCE CURRENT (mA)
GPIO OUTPUT VOLTAGE
vs. SINK CURRENT
GPIOC0, GPIOC1
OUTPUTS
900
600
300
0
0
GPIOA0, GPIOA1 OUTPUTS
AV_DD = DV_DD = 5V
EXTERNAL REFERENCE = 4.096V
20
40
60
80 100
SINK CURRENT (mA)
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