Datasheet

MAX1245
+2.375V, Low-Power, 8-Channel,
Serial 12-Bit ADC
6 _______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
(V
DD
= 2.5V, VREF = 2.048V, f
CLK
= 1.5MHz, C
LOAD
= 20pF, T
A
= +25°C, unless otherwise noted.)
100
1000
0.1
0.1
AVERAGE SUPPLY CURRENT
vs. CONVERSION RATE
10
1
CONVERSIONS PER CHANNEL PER SECOND (Hz)
I
DD
(µA)
101 1k 10k100 100k
MAX1245-13
V
DD
= VREF = 2.5V
CODE = 101010100000
R
L
=
∞
8 CHANNELS
1 CHANNEL
0.15
-0.25
0.25
0
4096
INTEGRAL NONLINEARITY
-0.20
0.20
0.10
-0.10
-0.15
INL (BITS)
0.05
0
-0.05
2048
DIGITAL CODE
20
-120
0
FFT PLOT
-100
0
-80
-40
-20
-60
10 20 30 40 50
AMPLITUDE (dB)
FREQUENCY (kHz)
f
TONE
= 10ksps
f
SAMPLE
= 100ksps
12.0
10.5
10.0
1 10 100
EFFECTIVE NUMBER OF BITS
vs. INPUT FREQUENCY
MAX1245-14
INPUT FREQUENCY (kHz)
EFFECTIVE NUMBER OF BITS
11.5
11.0