
6
Maxim Integrated
24-Bit, Single-Channel, Ultra-Low-Power, Delta
Sigma ADC with 2-Wire Serial Interface
MAX11202
Typical Operating Characteristics (continued)
(VAVDD = 3.6V, VDVDD = 1.8V, VREFP - VREFN = AVDD; internal clock; TA = TMIN to TMAX, unless otherwise specified. Typical values
are at TA = +25NC.)
INTERNAL OSCILLATOR FREQUENCY
vs. AVDD VOLTAGE
MAX11202
toc10
AVDD VOLTAGE (V)
FREQUENCY
(MHz)
3.45
3.30
3.15
3.00
2.85
2.2
2.3
2.4
2.5
2.6
2.1
2.70
3.60
VDVDD = 1.8V
MAX11202A
MAX11202B
NOISE vs. INPUT VOLTAGE
MAX11202
toc11
INPUT VOLTAGE (V)
NOISE
(V
RMS
)
2.0
1.5
-2.0 -1.5 -1.0
0 0.5
-0.5
1.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
-2.5
2.5
VREF = 2.5V
MAX11202A
MAX11202B
NOISE vs. TEMPERATURE
MAX11202
toc12
TEMPERATURE (°C)
NOISE
(V
RMS
)
75
55
-25
-5
15
35
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
-45
95
VREF = 3.0V
MAX11202A
MAX11202B
NOISE HISTOGRAM
(MAX11202A, 120sps)
MAX11202
toc13
ADC OUTPUT (V)
NUMBER
OF
READINGS
(%)
9.0
6.7
4.3
2.0
-0.3
2
4
6
8
10
12
14
0
-2.7
11.3
30,000 CONSECUTIVE READINGS
TA = +25°C
VREF = 2.5V
RMS = 2.1V
MEAN = 5.0V
ADC OUTPUT (V)
NUMBER
OF
READINGS
(%)
6.29
5.44
3.74 4.59
2.89
2.04
1.19
NOISE HISTOGRAM
(MAX11202B, 13.75sps)
2
4
6
8
10
12
14
16
18
20
0
MAX11202
toc14
30,000 CONSECUTIVE READINGS
TA = +25°C
VREF = 2.5V
RMS = 0.72V
MEAN = 4.1V
LONG-TERM ADC READINGS
(MAX11202A)
MAX11202
toc15
TIME (min)
ADC
READING
(V)
0.8
0.6
0.4
0.2
-10
-5
0
5
10
15
-15
0
1.0
TA = +25°C
VIN = 0V
RMS = 2.1V
LONG-TERM ADC READINGS
(MAX11202B)
MAX11202
toc16
TIME (min)
ADC
READING
(V)
8
6
4
2
-4
-3
-2
-1
0
1
2
3
4
5
-5
010
TA = +25°C
VIN = 0V
RMS = 0.72V
OFFSET ERROR vs. VREF
(MAX11202A/MAX11202B)
MAX11202
toc17
VREF VOLTAGE (V)
OFFSET
ERROR
(ppmFSR)
3.5
3.0
2.5
2.0
1.5
-0.5
0
0.5
1.0
1.5
2.0
-1.0
1.0
4.0
VREF = VREFP - VREFN
TA = +85°C
TA = -45°C
TA = +25°C
OFFSET ERROR vs. TEMPERATURE
(MAX11202A/MAX11202B)
MAX11202
toc18
TEMPERATURE (°C)
OFFSET
ERROR
(ppmFSR)
75
55
35
15
-5
-25
0.5
1.0
1.5
2.0
2.5
0
-45
95
CALIBRATED AT +25°C