MAX1220_12 Datasheet, PDF (13/43 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)
(V_AVDD = V_DVDD = 3V (MAX1257), external V_REF = 2.5V (MAX1257), V_AVDD = V_DVDD = 5V (MAX1220/MAX1258), external V_REF =
4.096V (MAX1220/MAX1258), 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.)
0
-20
-40
-60
-80
-100
-120
-140
-160
0
ADC FFT PLOT
f_SAMPLE = 32.768kHz
f_{ANALOG_N} = 10.080kHz
f_CLK = 5.24288MHz
SINAD = 71.27dBc
SNR = 71.45dBc
THD = 85.32dBc
SFDR = 87.25dBc
50
100
150
200
ANALOG INPUT FREQUENCY (kHz)
DAC OUTPUT LOAD REGULATION
vs. OUTPUT CURRENT
2.08
2.07
2.06
2.05
2.04
2.03 SINKING
2.02
SOURCING
2.01 DAC OUTPUT = MIDSCALE
MAX1220/MAX1258
2.00
-30
0
30
60
90
OUTPUT CURRENT (mA)
GPIO OUTPUT VOLTAGE
vs. SOURCE CURRENT
3.0
MAX1257
2.5
GPIOA0–A3 OUTPUTS
2.0
1.5
GPIOB0–B3, C0–C3
OUTPUTS
1.0
0.5
0
0
20
40
60
80 100
SOURCE CURRENT (mA)
0
-20
-40
-60
-80
-100
-120
-140
-160
0
ADC IMD PLOT
f_CLK = 5.24288MHz
f_IN1 = 9.0kHz
f_IN2 = 11.0kHz
A_IN = -6dBFS
IMD = 82.99dBc
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
MAX1257
1.21
-30 -20 -10 0 10 20 30
OUTPUT CURRENT (mA)
GPIO OUTPUT VOLTAGE
vs. SINK CURRENT
1500
GPIOB0–B3, C0–C3
OUTPUTS
1200
0
-20
-40
-60
-80
-100
-120
-140
-160
0
5
4
ADC CROSSTALK PLOT
f_CLK = 5.24288MHz
f_IN1 = 10.080kHz
f_IN2 = 8.0801kHz
SNR = 72.00dBc
THD = 85.24dBc
ENOB = 11.65 BITS
50
100
150
200
ANALOG INPUT FREQUENCY (kHz)
GPIO OUTPUT VOLTAGE
vs. SOURCE CURRENT
MAX1220/MAX1258
3
GPIOA0–A3 OUTPUTS
2
GPIOB0–B3,
1
C0–C3 OUTPUTS
0
0
1500
1200
20
40
60
80 100
SOURCE CURRENT (mA)
GPIO OUTPUT VOLTAGE
vs. SINK CURRENT
GPIOB0–B3, C0–C3
OUTPUTS
900
900
600
300
0
0
GPIOA0–A3 OUTPUTS
MAX1220/MAX1258
20
40
60
80
100
SINK CURRENT (mA)
600
300
0
0
GPIOA0–A3 OUTPUTS
MAX1257
10 20 30 40 50 60
SINK CURRENT (mA)
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