參數(shù)資料
型號(hào): LT6109HMS-1#TRPBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 模擬信號(hào)調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, PDSO10
封裝: LEAD FREE, PLASTIC, MSOP-10
文件頁(yè)數(shù): 16/28頁(yè)
文件大?。?/td> 370K
代理商: LT6109HMS-1#TRPBF
LT6109-1/LT6109-2
23
610912f
APPLICATIONS INFORMATION
Table 2. Error Budget (Worst Case Over Temperature)
ERROR SOURCE
LT6109 CIRCUIT CALCULATION
% ERROR
Amplifier Accuracy
Input Offset Voltage
450V/100mV 100
0.45
Input Bias Current
350nA 100Ω/100mV 100
0.035
Gain Error
0.20%
0.2
Supply Rejection
(2V/V 1.2V)/100mV 100
0.002
Common Mode Rejection
(7V/V 1.2V)/100mV 100
0.008
Total Amplifier Accuracy
0.7
Accuracy of RIN, ROUT Resistors
2 0.1%
0.2
Drift of RIN, ROUT Resistors
2 50ppm/°C 100°C 100
1
Accuracy of External Sense Resistor
1 1%
1
Drift of External Sense Resistor
1 50ppm/°C 100°C 100
0.5
Total Amplifier Accuracy With External Resistors
3.4
Comparator/Reference Accuracy
Threshold Accuracy
2%
2
Total Comparator And Reference Accuracy
2
Accuracy of RIN, ROUT Resistors
2 0.1%
0.2
Drift of RIN, ROUT Resistors
2 50ppm/°C 100°C 100
1
Accuracy of External Sense Resistor
1 1%
1
Drift of External Sense Resistor
1 50ppm/°C 100°C 100
0.5
Total Comparator And Reference Accuracy with External Resistors 4.7
Drift of External Resistors: The drift of R1 and RIN also
affects the accuracy of the trip point. Using resistors with
a drift of 50ppm/°C results in the following error:
2 50
ppm
°C
100
°C = 1%
Accuracy of External Sense Resistor: The load current is
converted to the sense voltage by RSENSE. The tolerance
of RSENSE contributes directly to the system error. Using
a 1% sense resistor results in a 1% error.
Drift of External Sense Resistor: The drift of RSENSE also
affects accuracy. Using a sense resistor with a drift of
50ppm/°C results in the following error:
50ppm/°C 100°C = 0.5%
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