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參數(shù)資料
| 型號(hào)： | LTC6101HVCHS5 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | High Voltage, High-Side Current Sense Amplifier in SOT-23 |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO5 |
| 封裝： | PLASTIC, MO-193, TSOT-23, 5 PIN |
| 文件頁數(shù)： | 9/20頁 |
| 文件大?。?/td> | 330K |
| 代理商： | LTC6101HVCHS5 |
LTC6101/LTC6101HV
9
6101fa
Figure 2. Kelvin Input Connection Preserves
Accuracy Despite Large Load Current
APPLICATIOU
W
U
U
LTC6101
R
OUT
V
OUT
6101 F02
3
5
4
2
1
R
IN
V
+
LOAD
R
SENSE
–
+
Useful Gain Configurations
Gain
20
50
100
R
IN
499
200
100
R
OUT
10k
10k
10k
V
SENSE
at V
OUT
= 5V
250mV
100mV
50mV
I
OUT
at V
OUT
= 5V
500
μ
A
500
μ
A
500
μ
A
Selection of External Current Sense Resistor
The external sense resistor, R
SENSE
, has a significant
effect on the function of a current sensing system and
must be chosen with care.
First, the power dissipation in the resistor should be
considered. The system load current will cause both heat
and voltage loss in R
SENSE
. As a result, the sense resistor
should be as small as possible while still providing the
input dynamic range required by the measurement. Note
that input dynamic range is the difference between the
maximum input signal and the minimum accurately repro-
duced signal, and is limited primarily by input DC offset of
the internal amplifier of the LTC6101. In addition, R
SENSE
must be small enough that V
SENSE
does not exceed the
maximum input voltage specified by the LTC6101, even
under peak load conditions. As an example, an application
may require that the maximum sense voltage be 100mV.
If this application is expected to draw 2A at peak load,
R
SENSE
should be no more than 50m
.
Once the maximum R
SENSE
value is determined, the mini-
mum sense resistor value will be set by the resolution or
dynamic range required. The minimum signal that can be
accurately represented by this sense amp is limited by the
input offset. As an example, the LTC6101B has a typical
input offset of 150
μ
V. If the minimum current is 20mA, a
sense resistor of 7.5m
will set V
SENSE
to 150
μ
V. This is
the same value as the input offset. A larger sense resistor
will reduce the error due to offset by increasing the sense
voltage for a given load current.
Choosing a 50m
R
SENSE
will maximize the dynamic
range and provide a system that has 100mV across the
sense resistor at peak load (2A), while input offset causes
an error equivalent to only 3mA of load current.
Peak dissipation is 200mW. If a 5m
sense resistor is
employed, then the effective current error is 30mA, while
the peak sense voltage is reduced to 10mV at 2A, dissipat-
ing only 20mW.
The low offset and corresponding large dynamic range of
the LTC6101 make it more flexible than other solutions in
this respect. The 150
μ
V typical offset gives 60dB of
dynamic range for a sense voltage that is limited to 150mV
max, and over 70dB of dynamic range if the rated input
maximum of 500mV is allowed.
Sense Resistor Connection
Kelvin connection of the IN
–
and IN
+
inputs to the sense
resistor should be used in all but the lowest power appli-
cations. Solder connections and PC board interconnec-
tions that carry high current can cause significant error in
measurement due to their relatively large resistances. One
10mm x 10mm square trace of one-ounce copper is
approximately 0.5m
. A 1mV error can be caused by as
little as 2A flowing through this small interconnect. This
will cause a 1% error in a 100mV signal. A 10A load current
in the same interconnect will cause a 5% error for the same
100mV signal. By isolating the sense traces from the high-
current paths, this error can be reduced by orders of
magnitude. A sense resistor with integrated Kelvin sense
terminals will give the best results. Figure 2 illustrates the
recommended method.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC6101HVCHS5#TRMPBF | 功能描述:IC AMP CURRENT SENSE TSOT23-5 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LTC6101HVCHS5#TRPBF | 功能描述:IC AMP CURRENT SENSE TSOT23-5 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LTC6101HVCIS5 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Voltage, High-Side Current Sense Amplifier in SOT-23 |
| LTC6101HVCIS5#PBF | 制造商:Linear Technology 功能描述:CURRENT SENSE AMP 200KHZ 5TS |
| LTC6101HVCIS5#TRMPBF | 功能描述:IC AMP CURRENT SENSE TSOT23-5 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
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