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MAX1021 Datasheet, PDF (11/40 Pages) Maxim Integrated Products – 10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports
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10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
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 REFERENCE SUPPLY CURRENT
vs. TEMPERATURE
41.0
40.9
40.8
40.7
40.6
AVDD = DVDD = 5V
EXTERNAL REFERENCE = 4.096V
40.5
-40 -15 10
35
60
85
TEMPERATURE (°C)
ADC REFERENCE SUPPLY CURRENT
vs. TEMPERATURE
25.1
25.0
24.9
24.8
AVDD = DVDD = 3V
EXTERNAL REFERENCE = 2.5V
24.7
-40 -15
10
35
60
85
TEMPERATURE (°C)
0
-20
-40
-60
-80
-100
-120
-140
-160
0
ADC FFT PLOT
fSAMPLE = 32.768kHz
fANALOG_)N = 10.080kHz
fCLK = 5.24288MHz
SINAD = 61.21dBc
SNR = 61.21dBc
THD = 73.32dBc
SFDR = 81.25dBc
50
100
150
200
ANALOG INPUT FREQUENCY (kHz)
ADC IMD PLOT
0
fCLK = 5.24288MHz
-20
fIN1 = 9.0kHz
fIN2 = 11.0kHz
-40
AIN = -6dBFS
IMD = 78.0dBc
-60
-80
-100
-120
-140
-160
0
50
100
150
200
ANALOG INPUT FREQUENCY (kHz)
DAC OUTPUT LOAD REGULATION
vs. OUTPUT CURRENT
1.29
1.28
1.27
1.26
1.25
1.24
SINKING
1.23
SOURCING
1.22
DAC OUTPUT = MIDSCALE
1.21
-30 -20 -10 0 10 20 30
OUTPUT CURRENT (mA)
0
-20
-40
-60
-80
-100
-120
-140
-160
0
5
ADC CROSSTALK PLOT
fCLK = 5.24288MHz
fIN1 = 10.080kHz
fIN2 = 8.0801kHz
SNR = 61.11dBc
THD = 73.32dBc
ENOB = 9.86 BITS
SFDR = 86.34dBc
50
100
150
200
ANALOG INPUT FREQUENCY (kHz)
GPIO OUTPUT VOLTAGE
vs. SOURCE CURRENT
4
3
GPIOA0, GPIOA1 OUTPUTS
2
GPIOC0, GPIOC1 OUTPUTS
1
AVDD = DVDD = 5V
EXTERNAL REFERENCE = 4.096V
0
0
20
40
60
80 100
SOURCE CURRENT (mA)
DAC OUTPUT LOAD REGULATION
vs. OUTPUT CURRENT
2.08
AVDD = DVDD = 5V
2.07
EXTERNAL REFERENCE = 4.096V
2.06
2.05
2.04
2.03 SINKING
2.02
SOURCING
2.01
DAC OUTPUT = MIDSCALE
2.00
-30
0
30
60
90
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)
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