MAX1245 Datasheet, PDF (6/20 Pages) Maxim Integrated Products – +2.375V, Low-Power, 8-Channel, Serial 12-Bit ADC

+2.375V, Low-Power, 8-Channel,
Serial 12-Bit ADC
____________________________Typical Operating Characteristics (continued)
(VDD = 2.5V, VREF = 2.048V, fCLK = 1.5MHz, CLOAD = 20pF, TA = +25°C, unless otherwise noted.)
AVERAGE SUPPLY CURRENT
vs. CONVERSION RATE
1000
100
VDD = VREF = 2.5V
CODE = 101010100000
RL = ∞
EFFECTIVE NUMBER OF BITS
vs. INPUT FREQUENCY
12.0
11.5
10
8 CHANNELS
1
1 CHANNEL
0.1
0.1 1 10 100 1k 10k 100k
CONVERSIONS PER CHANNEL PER SECOND (Hz)
11.0
10.5
10.0
1
10
100
INPUT FREQUENCY (kHz)
0.25
0.20
0.15
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-0.25
0
INTEGRAL NONLINEARITY
2048
DIGITAL CODE
4096
20
0
-20
-40
-60
-80
-100
-120
0
FFT PLOT
fTONE = 10ksps
fSAMPLE = 100ksps
10
20
30
FREQUENCY (kHz)
40
50
6 _______________________________________________________________________________________