MAX1221 Datasheet, PDF (11/44 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 FULL-SCALE ERROR
vs. REFERENCE VOLTAGE
1.00
AV_DD = DV_DD = 5V
0.75
0.50
0.25
0
-0.25
-0.50
-0.75
DAC FULL-SCALE ERROR
vs. REFERENCE VOLTAGE
0
-1
-2
-3
-4
-5
-6
DAC FULL-SCALE ERROR
vs. LOAD CURRENT
5
AV_DD = DV_DD = 5V
EXTERNAL REFERENCE = 4.096V
0
-5
-10
-1.00
0
1
2
3
4
5
REFERENCE VOLTAGE (V)
-7
0 0.5 1.0 1.5 2.0 2.5 3.0
REFERENCE VOLTAGE (V)
-15
0
5 10 15 20 25 30
LOAD CURRENT (mA)
DAC FULL-SCALE ERROR
vs. LOAD CURRENT
5
INTERNAL REFERENCE
VOLTAGE vs. TEMPERATURE
2.52
ADC REFERENCE SUPPLY CURRENT
vs. ANALOG SUPPLY VOLTAGE
25.1
0
2.51
25.0
-5
2.50
24.9
-10
2.49
24.8
-15
0
41.0
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (mA)
ADC REFERENCE SUPPLY
CURRENT vs. TEMPERATURE
40.9
40.8
40.7
40.6
AV_DD = DV_DD = 5V
EXTERNAL REFERENCE = 4.096V
40.5
-40 -15 10
35
60
85
TEMPERATURE (°C)
2.48
-40 -15
10
35
60
85
TEMPERATURE (°C)
ADC REFERENCE SUPPLY
CURRENT vs. TEMPERATURE
25.1
25.0
24.9
24.8
AV_DD = DV_DD = 3V
EXTERNAL REFERENCE = 2.5V
24.7
-40 -15
10
35
60
85
TEMPERATURE (°C)
24.7
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
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)
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