Cirrus Logic AN31 - Manual (Page 25)

400
300
200
100
0
-4 -3 -2 -1 0 1 2 3 4
1000 Conversions
1 = 1.07 LSB
Average = 0.035 LSB
Output word
rate = 50/second
OUTPUT CODE (1 LSB = 34.3 nV)
O
C
CUR
A
N
CE
S
4
68
227
379
249
59
13
1
Figure 18. Noise Histogram of 1000 Conversions.
2.0
1.0
0.0
-1.0
-2.0
0.0 0.5 1.0
TIME (hour)
N
O
IS
E (L
SB
s)
1 LSB = 34.3 nV
Figure 19. Digitizer Stability Over One Hour.
Bridge Transducer Digitizer Circuits
AN31REV3 25