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參數(shù)資料
| 型號： | LTC1967IMS8 |
| 廠商： | Linear Integrated Systems |
| 英文描述： | Precision Extended Bandwidth, RMS-to-DC Converter |
| 中文描述： | 精密擴(kuò)展帶寬，有效值- DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 14/28頁 |
| 文件大小： | 328K |
| 代理商： | LTC1967IMS8 |
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14
LTC1967
1967f
100mV to 110mV (+10%) and back (–10%), the step
responses are essentially the same as a standard expo-
nential rise and decay between those two levels. In such
cases, the time constant of the decay will be in between
that of the rising edge and falling edge cases of Figure 10.
Therefore, the worst case is the falling edge response as
it goes to zero, and it can be used as a design guide.
Figure11 shows the settling accuracy vs settling time for
a variety of averaging capacitor values. If the capacitor
value previously selected (based on error requirements)
gives an acceptable settling time, your design is done.
But with 100
μ
F, the settling time to even 10% is a full 20
seconds, which is a long time to wait. What can be done
about such a design If the reason for choosing 100
μ
F is
to keep the DC error with a 100mHz input less than 0.1%,
the answer is: not much. The settling time to 1% of 32
seconds is just 3.2 cycles of this extremely low frequency.
Averaging very low frequency signals takes a long time.
However, if the reason for choosing 100
μ
F is to keep the
peak error with a 10Hz input less than 0.1%, there is
another way to achieve that result with a much improved
settling time.
APPLICATIOU
W
U
U
TIME (SEC)
0
0
O
20
40
60
80
100
120
0.05
0.1
0.15
0.2
1967 F10a
0.25
C
AVE
= 1
μ
F
Figure 10a. LTC1967 Rising Edge with C
AVE
= 1
μ
F
Figure 10b. LTC1967 Falling Edge with C
AVE
= 1
μ
F
Figure 11. Settling Time with One Cap Averaging
TIME (SEC)
0
0
O
20
40
60
80
100
120
0.1
0.2
0.3
0.4
1967 F10b
0.5
C
AVE
= 1
μ
F
SETTLING TIME (SEC)
0.01
0.1
S
1
10
1
10
0.1
100
1966 F12
C = 0.1
μ
F
C = 0.22
μ
F
C = 0.47
μ
F
C = 1
μ
F
C = 2.2
μ
F
C = 4.7
μ
F
C = 10
μ
F
C = 22
μ
F
C = 47
μ
F
C = 100
μ
F
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1967IMS8#PBF | 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:46 系列:- 電流 - 電源:1.2mA 電源電壓:±18 V，36 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:管件 |
| LTC1967IMS8#TR | 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:46 系列:- 電流 - 電源:1.2mA 電源電壓:±18 V，36 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:管件 |
| LTC1967IMS8#TRPBF | 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:46 系列:- 電流 - 電源:1.2mA 電源電壓:±18 V，36 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:管件 |
| LTC1968CMS8 | 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:46 系列:- 電流 - 電源:1.2mA 電源電壓:±18 V，36 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:管件 |
| LTC1968CMS8#PBF | 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:46 系列:- 電流 - 電源:1.2mA 電源電壓:±18 V，36 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:管件 |
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