Rainbow Electronics MAX1204 - Manual (Page 20)

MAX1204
5V, 8-Channel, Serial, 10-Bit ADC
with 3V Digital Interface
20 ______________________________________________________________________________________
+5V
510k
100k
24k
0.01µF
12
REFADJ
MAX1204
Figure 17. Reference-Adjust Circuit
+5V -5V +3V GND
SUPPLIES
DGND +3V VL V SS
GND V DD
DIGITAL
CIRCUITRY MAX1204
R* = 10 Ω
*OPTIONAL
Figure 18. Power-Supply Grounding Connection
Figure 15. Unipolar Transfer Function, 4.096V = Full Scale
OUTPUT CODE
FULL-SCALE
TRANSITION
11 . . . 111
11 . . . 110
11 . . . 101
00 . . . 011
00 . . . 010
00 . . . 001
00 . . . 000
1 2 3 0 FS
FS - 3/2LSB
FS = +4.096V
1LSB = FS
1024
INPUT VOLTAGE (LSBs)
Figure 16. Bipolar Transfer Function, ±4.096V/2 = Full Scale
011 . . . 111
OUTPUT CODE
011 . . . 110
000 . . . 010
000 . . . 001
000 . . . 000
111 . . . 111
111 . . . 110
111 . . . 101
100 . . . 001
100 . . . 000
-FS
0V
INPUT VOLTAGE (LSBs)
+FS - 1LSB
FS = +4.096V
2
1LSB = +4.096V
1024