MAX1146 Datasheet, PDF (8/25 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.)
REFERENCE VOLTAGE vs. SUPPLY VOLTAGE
(MAX1146/MAX1148)
4.0980
4.0975
4.0970
4.0965
4.0960
4.0955
4.0950
4.0945
4.0940
4.75 4.85 4.95 5.05 5.15 5.25
SUPPLY VOLTAGE (V)
REFERENCE VOLTAGE vs. SUPPLY VOLTAGE
(MAX1147/MAX1149)
2.5020
2.5015
2.5010
2.5005
2.5000
2.4995
2.4990
2.4985
2.4980
2.7
3.0
3.3
3.6
SUPPLY VOLTAGE (V)
REFERENCE VOLTAGE vs. TEMPERATURE
(MAX1146/MAX1148)
4.100
4.099
4.098
4.097
4.096
4.095
4.094
4.093
4.092
4.091
4.090
-40 -15 10
35
60
85
TEMPERATURE (°C)
REFERENCE VOLTAGE vs. TEMPERATURE
(MAX1147/MAX1149)
2.503
2.502
REFERENCE BUFFER POWER-UP DELAY
vs. TIME IN SHUTDOWN
2500
CREF = 4.7µF
CREFADJ = 0.01µF
2000
2.501
1500
2.500
1000
2.499
500
2.498
2.497
-40 -15 10
35
60
85
TEMPERATURE (°C)
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
0
FFT PLOT
fIN = 1kHz
fSAMPLE = 116ksps
VDD = 5V/3V
1000 2000 3000 4000 5000
FREQUENCY (Hz)
0
0.001
0.01
0.1
1
10
TIME IN SHUTDOWN (s)
EFFECTIVE NUMBER OF BITS
vs. FREQUENCY
13.0
12.9
12.8
12.7
12.6
12.5
12.4
12.3
12.2
12.1
12.0
1
10 19 28 37 46 55
FREQUENCY (kHz)
8 _______________________________________________________________________________________