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AD1200 Reference
__________________________________ _
Figure 1-7. Bit Weights And Resolution.
BITS
n
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Unipolar Vs Bipolar Voltage Ranges.
_______________________________ _
A Unipolar voltage is a positive only voltage, it can vary
between zero volts and a maximum positive value. 0 to +5V is a
typical unipolar voltage range.
A Bipolar voltage is one that can be positive or negative, it
can vary from an extreme minimum negative value, through zero
volts, up to a maximum positive value, -5V to +5V is a typical
bipolar range.
Differential Vs Single Ended Signals.
_______________________________ _
A single ended signal is where the analogue voltage is
Page 8
STATES
PERCENTAGE
n
2
1
100
2
50
4
25
8
12.5
16
6.25
32
3.125
64
1.5625
128
0.78125
256
0.39063
512
0.19531
1,024
0.09766
2,048
0.04883
4,096
0.02441
8,192
0.01221
16,384
0.00610
32,768
0.00305
65,536
0.00153
131,072
0.00076
262,144
0.00038
524,288
0.00019
1,048,576
0.00010
PARTS
PER MILLION
%
PPM
1,000,000
500,000
250,000
125,000
62,500
31,250
15,625
7,812.50
3,906.25
1,953.13
976.56
488.28
244.14
122.07
Introduction
DYNAMIC
RANGE
dB
0.0
6.0
12.0
18.1
24.1
30.1
36.1
42.1
48.2
54.2
60.2
66.2
72.3
78.3
61.04
84.3
30.52
90.3
15.26
96.3
7.63
102.4
3.82
108.4
1.91
114.4
0.95
120.4
Chapter 1
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