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ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - ADC/DAC 10 Bit TQFN 48
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MAX1020/MAX1022/MAX1057/MAX1058
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
______________________________________________________________________________________ 13
ADC FFT PLOT
MAX1020 toc37
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
15010050
-140
-120
-100
-80
-60
-40
-20
0
-160
0200
f
SAMPLE
= 32.768kHz
f
ANALOG_)N
= 10.080kHz
f
CLK
= 5.24288MHz
SINAD = 61.21dBc
SNR = 61.21dBc
THD = 73.32dBc
SFDR = 81.25dBc
ADC IMD PLOT
MAX1020 toc38
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
15010050
-140
-120
-100
-80
-60
-40
-20
0
-160
0200
f
CLK
= 5.24288MHz
f
IN1
= 9.0kHz
f
IN2
= 11.0kHz
A
IN
= -6dBFS
IMD = 78.0dBc
ADC CROSSTALK PLOT
MAX1020 toc39
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
15010050
-140
-120
-100
-80
-60
-40
-20
0
-160
0200
f
CLK
= 5.24288MHz
f
IN1
= 10.080kHz
f
IN2
= 8.0801kHz
SNR = 61.11dBc
THD = 73.32dBc
ENOB = 9.86 BITS
SFDR = 86.34dBc
DAC OUTPUT LOAD REGULATION
vs. OUTPUT CURRENT
MAX1020 toc40
OUTPUT CURRENT (mA)
DAC OUTPUT VOLTAGE (V)
60300
2.01
2.02
2.03
2.04
2.05
2.06
2.07
2.08
2.00
-30 90
DAC OUTPUT = MIDSCALE
MAX1020/MAX1022/MAX1058
SINKING
SOURCING
DAC OUTPUT LOAD REGULATION
vs. OUTPUT CURRENT
MAX1020 toc41
OUTPUT CURRENT (mA)
DAC OUTPUT VOLTAGE (V)
20100-20
-10
1.22
1.23
1.24
1.25
1.26
1.27
1.28
1.29
1.21
-30 30
DAC OUTPUT = MIDSCALE
MAX1057
SINKING
SOURCING
GPIO OUTPUT VOLTAGE
vs. SOURCE CURRENT
MAX1020 toc42
SOURCE CURRENT (mA)
GPIO OUTPUT VOLTAGE (V)
80604020
1
2
3
4
5
0
0100
MAX1020/MAX1022/MAX1058
GPIOA0–A3 OUTPUTS
GPIOB0–B3,
C0–C3 OUTPUTS
GPIO OUTPUT VOLTAGE
vs. SOURCE CURRENT
MAX1020 toc43
SOURCE CURRENT (mA)
GPIO OUTPUT VOLTAGE (V)
80604020
0.5
1.0
1.5
2.0
2.5
3.0
0
0100
MAX1057
GPIOA0–A3 OUTPUTS
GPIOB0–B3, C0–C3
OUTPUTS
GPIO OUTPUT VOLTAGE
vs. SINK CURRENT
MAX1020 toc44
SINK CURRENT (mA)
GPIO OUTPUT VOLTAGE (mV)
80604020
300
600
900
1200
1500
0
0100
MAX1020/MAX1022/MAX1058
GPIOA0–A3 OUTPUTS
GPIOB0–B3, C0–C3
OUTPUTS
GPIO OUTPUT VOLTAGE
vs. SINK CURRENT
MAX1020 toc45
SINK CURRENT (mA)
GPIO OUTPUT VOLTAGE (mV)
40 50302010
300
600
900
1200
1500
0
060
MAX1057
GPIOA0–A3 OUTPUTS
GPIOB0–B3, C0–C3
OUTPUTS
Typical Operating Characteristics (continued)
(V
AVDD
= V
DVDD
= 3V (MAX1057), external V
REF
= 2.5V (MAX1057), V
AVDD
= V
DVDD
= 5V (MAX1020/MAX1022/MAX1058), external
V
REF
= 4.096V (MAX1020/MAX1022/MAX1058), f
CLK
= 3.6MHz (50% duty cycle), f
SAMPLE
= 225ksps, C
LOAD
= 50pF, 0.1µF capaci-
tor at REF, T
A
= +25°C, unless otherwise noted.)