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參數(shù)資料
| 型號： | SP8503KS |
| 元件分類： | 串行ADC |
| 英文描述： | 12-Bit Sampling A/D Converters |
| 中文描述： | 12位采樣的A / D轉(zhuǎn)換器 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 171K |
| 代理商： | SP8503KS |
51
R/C
BUSY
Converter
Mode
Data
BUS
Acquire
Convert
Acquire
Convert
Data Valid
Hi-Z State
Hi-Z State
Data Valid
t
W
t
DBC
t
B
t
DBE
t
A
t
C
t
AP
t
HDR
and t
HL
t
DB
Figure 5. Convert Mode Timing — R/C Pulse LOW, Outputs Enabled After Conversion
Series
may draw excessive current. In normal
operation, this is not a problem because both pins
will be soldered together. However, during evalu-
ation, incoming inspection, repair, etc., where the
potential of a “Hot Socket” exists, care should be
taken to apply power to the
SP85XX Series
only
after it has been socketed.
Minimizing “Glitches”
Coupling of external transients into an analog-to-
digital converter can cause errors which are difficult to
debug. In addition to the discussions earlier on layout
considerations for supplies, bypassing and grounding,
there are several other useful steps that can be taken to
get the best analog performance out of a system using
the
SP85XX Series.
These potential system problem
sources are particularly important to consider when
developing a new system, and looking for the causes
of errors in breadboards.
First, care should be taken to avoid glitches during
critical times in the sampling and conversion process.
Since the
SP85XX Series
has an internal sample/hold
function, the signal that puts it into the hold state (R/C
going LOW) is critical, as it would be on any sample/
hold amplifier. The R/C falling edge should have a 5
to 10ns transition time, low jitter, and have minimal
ringing, especially during the 20ns after it falls.
R/C
BUSY
Converter
Mode
Data
BUS
Acquire
Convert
Acquire
Convert
Data
Valid
Hi-Z State
Hi-Z State
t
W
t
DBC
t
B
t
DBE
t
A
t
C
t
AP
t
HDR
and t
HL
t
AP
Data
Valid
Hi-Z State
t
DD
Figure 6. Read Mode Timing — R/C Pulse HIGH, Outputs Enabled Only When R/C is High
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP8505 | 12-Bit Sampling A/D Converters |
| SP8505KN | 12-Bit Sampling A/D Converters |
| SP8505KS | 12-Bit Sampling A/D Converters |
| SP8510 | 12-Bit Sampling A/D Converters |
| SP8510KN | 12-Bit Sampling A/D Converters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| SP8505 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:12-Bit Sampling A/D Converters |
| SP8505KN | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:12-Bit Sampling A/D Converters |
| SP8505KS | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:12-Bit Sampling A/D Converters |
| SP8510 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:12-Bit Sampling A/D Converters |
| SP8510KN | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:12-Bit Sampling A/D Converters |
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