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參數(shù)資料
| 型號： | INA196AIDBVT |
| 英文描述： | CURRENT SHUNT MONITOR |
| 中文描述： | 電流分流監(jiān)測 |
| 文件頁數(shù)： | 8/15頁 |
| 文件大?。?/td> | 226K |
| 代理商： | INA196AIDBVT |
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SBOS307B MAY 2004 REVISED JUNE 2004
www.ti.com
8
INPUT FILTERING
An obvious and straightforward location for filtering is at
the output of the INA19x series; however, this location
negates the advantage of the low output impedance of the
internal buffer. The only other option for filtering is at the
input pins of the INA19x, which is complicated by the
internal 5k
+ 30% input impedance; see Figure 2. Using
the lowest possible resistor values minimizes both the
initial shift in gain and effects of tolerance. The effect on
initial gain is given by:
GainError%
100
100
5k
5k
R
FILT
Total effect on gain error can be calculated by replacing the
5k
term with 5k
30%, (or 3.5k
) or 5k
+ 30% (or
6.5k
). The tolerance extremes of R
FILT
can also be
inserted into the equation. If a pair of 100
1% resistors
are used on the inputs, the initial gain error will be 1.96%.
Worst-case tolerance conditions will always occur at the
lower excursion of the internal 5k
resistor (3.5k
), and
the higher excursion of R
FILT
3% in this case.
Note that the specified accuracy of the INA19x must then
be combined in addition to these tolerances. While this
discussion treated accuracy worst-case conditions by
combining the extremes of the resistor values, it is
appropriate to use geometric mean or root sum square
calculations to total the effects of accuracy variations.
LOAD
V
SUPPLY
f
3dB
=
f
3dB
1
2
π
(2 R
FILTER
) C
FILTER
C
FILTER
R
SHUNT
<<R
FILTER
R
FILTER
< 100
R
FILTER
< 100
V
IN+
V
IN
+5V
V+
OUT
INA193INA198
5k
5k
Figure 2. Input Filter (Gain Error 1.5% to 2.2%)
(1)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| INA196AIDBVT | 制造商:Texas Instruments 功能描述:Current Shunt Monitor IC |
| INA196AIDBVTG4 | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Vltg Out Hi-Sd Msmnt Current Shunt Mntr RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| INA196AMDBVREP(2) | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT SHUNT MONITORSa??16 V to 80 V Common Mode Range |
| INA196A-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT SHUNT MONITORS a??16-V to 80-V Common-Mode Range |
| INA196AQDBVRQ1 | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Auto Cat Common- Mode Range Mon RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
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