MAX11902 Datasheet, PDF (9/29 Pages) Maxim Integrated Products – Fully Differential SAR ADC

MAX11902
18-Bit, 1Msps, Low-Power,
Fully Differential SAR ADC
Typical Operating Characteristics (continued)
(V_AVDD = 1.8V, V_DVDD = 1.8V, V_OVDD = 1.8V, V_REFVDD = 3.6V, f_SAMPLE = 1Msps, V_REF = 3.3V, Internal Ref Buffer On, T_A = T_MIN to
T_MAX, unless otherwise noted. Typical values are at T_A = +25°C.)
4.0
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
-4.0
2.7
INL vs. REFVDD SUPPLY VOLTAGE
toc7
MAX INL (LSB)
MIN INL (LSB)
V_AVDD = 1.8V
V_REF = 2.5V
2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
V_REFVDD (V)
0.5
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
2.7
DNL vs. REFVDD SUPPLY VOLTAGE
toc8
MAX DNL (LSB)
MIN DNL (LSB)
V_AVDD = 1.8V
V_REF = 2.5V
2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
V_REFVDD (V)
OFFSET AND GAIN ERROR vs. TEMPERATURE
4
OFFSET (LSB)
toc9
V_REF = 3.3V
GAIN ERROR (LSB)
V_REFVDD = 3.6V
2
0
-2
-4
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
OFFSET ERROR vs. REFVDD VOLTAGE
2.0
V_REF = 2.5V
1.5 ^VAVDD ^{= 1.8V}
toc11
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
2.7 2.8 2.9
3
3.1 3.2 3.3 3.4 3.5 3.6
V_REFVDD (V)
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0.5
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
1.7
OFFSET ERROR vs. AVDD SUPPLY VOLTAGE
toc10
V_REF = 3.3V
V_REFVDD = 3.6V
1.75
1.8
1.85
1.9
V_AVDD (V)
60000
50000
40000
30000
20000
10000
0
OUTPUT NOISE HISTOGRAM
toc12
STDEV = 0.99 LSB_RMS
OUTPUT CODE (DECIMAL)
Maxim Integrated │  9