User guide

MAX1272/MAX1273
Fault-Protected, 12-Bit ADCs
with Software-Selectable Input Range
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Typical operating circuit, BIP = RNG = 1, V
DD
= 5V, external reference mode, V
REF
= 4.096V, C
REF
= 1.0µF, f
SCLK
= 1.4MHz,
50% duty cycle, 87ksps, T
A
= +25°C, unless otherwise noted.)
STANDBY SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1272/73 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.205.155.05 5.104.85 4.90 4.95 5.004.80
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
4.75 5.25
V
AIN
= 0
INTERNAL
REFERENCE
EXTERNAL
REFERENCE
FULL POWER-DOWN
SUPPLY CURRENT vs. TEMPERATURE
MAX1272/73 toc05
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
603510-15
1
2
3
4
5
6
7
8
9
10
0
-40 85
V
AIN
= 0
INTERNAL/EXTERNAL
REFERENCE
FULL POWER-DOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1272/73 toc06
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
5.205.155.05 5.104.85 4.90 4.95 5.004.80
1
2
3
4
5
6
7
8
9
10
0
4.75 5.25
V
AIN
= 0
INTERNAL/EXTERNAL
REFERENCE
NORMALIZED INTERNAL REFERENCE
VOLTAGE vs. TEMPERATURE
MAX1272/73 toc07
TEMPERATURE (
°
C)
NORMALIZED INTERNAL REFERENCE VOLTAGE
6035-15 10
0.9970
0.9975
0.9980
0.9985
0.9990
0.9995
1.0000
1.0005
0.9960
0.9965
-40 85
NORMALIZED INTERNAL REFERENCE
VOLTAGE vs. SUPPLY VOLTAGE
MAX1272/73 toc08
SUPPLY VOLTAGE (V)
NORMALIZED INTERNAL REFERENCE VOLTAGE
5.205.155.05 5.104.85 4.90 4.95 5.004.80
0.9992
0.9994
0.9996
0.9998
1.0000
1.0002
1.0004
1.0006
1.0008
1.0010
0.9990
4.75 5.25
DNL vs. CODE
MAX1272/73 toc09
CODE
DNL (LSB)
358430722048 25601024 1536512
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
0 4096
INL vs. CODE
MAX1272/73 toc10
CODE
INL (LSB)
358430722048 25601024 1536512
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
0 4096