MAX11208 Datasheet, PDF (6/14 Pages) Maxim Integrated Products – 20-Bit, Single-Channel, Ultra-Low-Power, Delta-Sigma ADC with 2-Wire Serial Interface

20-Bit, Single-Channel, Ultra-Low-Power,
Delta-Sigma ADC with 2-Wire Serial Interface
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
2.6
VDVDD = 1.8V
2.5
MAX11208A
2.4
2.3
MAX11208B
2.2
OFFSET ERROR vs. VREF
(MAX11208A/MAX11208B)
2.0
VREF = VREFP - VREFN
1.5
TA = +25°C
1.0
0.5
0 ^{TA = +85°C T}A ^{= -45°C}
-0.5
OFFSET ERROR vs. TEMPERATURE
(MAX11208A/MAX11208B)
2.5
CALIBRATED AT +25°C
2.0
1.5
1.0
0.5
2.1
2.70 2.85 3.00 3.15 3.30 3.45 3.60
AVDD VOLTAGE (V)
-1.0
1.0 1.5 2.0 2.5 3.0 3.5 4.0
VREF VOLTAGE (V)
0
-45 -25 -5 15 35 55 75 95
TEMPERATURE (°C)
INTEGRAL NONLINEARITY vs. INPUT
VOLTAGE (MAX11208A/MAX11208B)
10
8
VAVDD = 3.0V
VDVDD = 1.8V
6 VREF = 2.5V
4 ^{VIN(CM) = 1.5V}
2
TA = +85°C
TA = +25°C
0
-2
-4
T_A = -45°C
-6
-8
-10
-2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5
INPUT VOLTAGE (V)
PSRR vs. FREQUENCY
(MAX11208B)
0
-20
-40
-60
-80
VAVDD
-100
-120
VDVDD
-140
1
10 100 1k 10k 100k
FREQUENCY (Hz)
FULL-SCALE ERROR vs. TEMPERATURE
(MAX11208A/MAX11208B)
10
8
VREF = 2.5V
6
+FS ERROR
4
2
0
-2
-4
-6
-FS ERROR
-8
-10
-45 -25 -5 15 35 55 75
TEMPERATURE (°C)
CMRR vs. FREQUENCY
(MAX11208A/MAX11208B)
0
-20
-40
-60
-80
MAX11208A
-100
-120
-140
1
MAX11208B
10 100 1k 10k 100k
FREQUENCY (Hz)
PSRR vs. FREQUENCY
(MAX11208A)
0
-20
-40
-60
-80
VAVDD
-100
VDVDD
-120
-140
1
10 100 1k 10k 100k
FREQUENCY (Hz)
NORMAL-MODE FREQUENCY RESPONSE
(MAX11208A)
0
-20
-40
-60
-80
-100
-120
-140
1
10
100
1k
FREQUENCY (Hz)
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