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參數(shù)資料
| 型號： | LTC1968IMS8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 模擬專用變換器 |
| 英文描述： | Precision Wide Bandwidth, RMS-to-DC Converter |
| 中文描述： | RMS TO DC CONVERTER, PDSO8 |
| 封裝： | PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 14/28頁 |
| 文件大?。?/td> | 305K |
| 代理商： | LTC1968IMS8 |
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14
LTC1968
1968f
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.
Figure 11 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 220
μ
F, the settling time to even 10% is a full 10
seconds, which is a long time to wait. What can be done
about such a design If the reason for choosing 220
μ
F is
to keep the DC error with a 200mHz input less than 0.1%,
the answer is: not much. The settling time to 1% of 20
seconds is just 4 cycles of this extremely low frequency.
Averaging very low frequency signals takes a long time.
However, if the reason for choosing 220
μ
F is to keep the
peak error with a 10Hz input less than 0.2%, 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
0.10
0.20
0.30
0.40
1968 F10a
0.50
C
AVE
= 10
μ
F
Figure 10a. LTC1968 Rising Edge with C
AVE
= 10
μ
F
Figure 10b. LTC1968 Falling Edge with C
AVE
= 10
μ
F
Figure 11. Settling Time vs Cap Value, One Cap Averaging
TIME (SEC)
0
0
O
20
40
60
80
100
120
0.20
0.40
0.60
0.80
1968 F10b
1
C
AVE
= 10
μ
F
SETTLING TIME (SEC)
0.01
0.1
S
1
10
1
10
0.1
100
1968 F11
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
C = 220
μ
F
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| LTC1968IMS8#PBF | 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉換器 系列:- 標準包裝: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） 供應商設備封裝:16-SOIC W 包裝:管件 |
| LTC1968IMS8#TR | 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉換器 系列:- 標準包裝: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） 供應商設備封裝:16-SOIC W 包裝:管件 |
| LTC1968IMS8#TRPBF | 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉換器 系列:- 標準包裝: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） 供應商設備封裝:16-SOIC W 包裝:管件 |
| LTC1980EGN | 功能描述:IC PWM BATT CHARGER/CONV 24-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:帶卷 (TR) |
| LTC1980EGN#PBF | 功能描述:IC PWM BATT CHARGER/CONV 24-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:帶卷 (TR) |
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