MAX1146 Datasheet, PDF (10/25 Pages) Maxim Integrated Products – Multichannel, True-Differential, Serial, 14-Bit ADCs

Multichannel, True-Differential,
Serial, 14-Bit ADCs
Typical Operating Characteristics (continued)
(VDD = +5.0V (MAX1146/MAX1148), VDD = +3.3V (MAX1147/MAX1149), SHDN = VDD, VCOM = 0, fSCLK = 2.1MHz, external clock
(50% duty cycle), 18 clocks/conversion (116ksps), V_REFADJ = V_DD, external +4.096V reference at REF (MAX1146/MAX1148), exter-
nal +2.500V reference at REF (MAX1147/MAX1149), CREF = 2.2µF, CLOAD = 50pF, TA = +25°C, unless otherwise noted.)
CHANNEL-TO-CHANNEL GAIN MATCHING
vs. TEMPERATURE
6
CHANNEL-TO-CHANNEL OFFSET MATCHING
vs. SUPPLY VOLTAGE (MAX1147/MAX1149)
6
4
4
2
2
0
0
-2
-2
-4
-4
-6
-40 -15
10
35
60
85
TEMPERATURE (°C)
-6
2.7
3.0
3.3
3.6
SUPPLY VOLTAGE (V)
CHANNEL-TO-CHANNEL OFFSET MATCHING
vs. SUPPLY VOLTAGE (MAX1146/MAX1148)
6
CHANNEL-TO-CHANNEL OFFSET MATCHING
vs. TEMPERATURE
6
4
4
2
2
0
0
-2
-2
-4
-4
-6
4.75 4.85 4.95 5.05 5.15 5.25
SUPPLY VOLTAGE (V)
GAIN ERROR vs. TEMPERATURE
6
-6
-40 -15 10
35
60
85
TEMPERATURE (°C)
OFFSET ERROR vs. TEMPERATURE
6
4
4
2
2
0
0
-2
-2
-4
-4
-6
-40 -15
10
35
60
85
TEMPERATURE (°C)
-6
-40 -15
10
35
60
85
TEMPERATURE (°C)
10 ______________________________________________________________________________________