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| 型号： | AN-7820 |
| 厂商： | Fairchild Semiconductor Corporation |
| 元件分类： | 圆形连接器 |
| 英文描述： | Circular Connector; No. of Contacts:37; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:15-35 RoHS Compliant: No |
| 中文描述： | 评价委员会 |
| 文件页数： | 11/17页 |
| 文件大小： | 206K |
| 代理商： | AN-7820 |
11
5/22/97
AN7820/24
Figure 15: Three-Bit Reconstruction DAC Waveform Using Analog Input Ramp
contain n conversions
Theoretical
Actual
Non- Monotonic
LSB
DLE
≈
-1/2 LSB
111
110
101
100
011
010
001
000
(A)
(B)
Last 3-LSB codes
1
Ramp Input
Missing Code
(MC)
(A) is the actual bit weight for the output code multiple of 011
(B) is the major transition noise. This noise level shown is greater than
±
1/2 LSB
Disadvantages:
1)
The accuracy depends on human judgement and can be
very difficult if the person is not familiar with it.
2)
The exact code is not shown in the transfer curve, but in
a multiple of the last three bits of the LSB. To overcome
this problem, probe every bit using an oscilloscope or
install LEDs at each output (P3 connector) to signal the
state of each output bit.
Advantages:
1)
Many tests (as stated above) can be extracted from this
one, simple test set-up.
2)
The missing code and the transition noise can be more
accurately identified than with any other standard test
methods.
3)
Set-up is quick and relatively accurate.
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