參數(shù)資料
型號(hào)： LTC6101ACMS8
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 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, PDSO8
封裝： PLASTIC, MSOP-8
文件頁(yè)數(shù)： 10/20頁(yè)
文件大?。?/td> 330K
代理商： LTC6101ACMS8
LTC6101/LTC6101HV
10
6101fa
6101 F03b
–
–
–
+
R
7.5k
V
IN
301
301
V
OUT
I
LOAD
5
1
3
LTC6101
2
4
R
SENSE LO
M1
Si4465
10k
CMPZ4697
7.5k
V
IN
1.74M
4.7k
Q1
CMPT5551
40.2k
3
4
5
6
1
2
8
7
619k
HIGH
RANGE
INDICATOR
(I
LOAD
> 1.2A)
V
LOGIC
(3.3V TO 5V)
LOW CURRENT RANGE OUT
2.5V/A
(
V
LOGIC
+5V
)
≤
V
IN
≤
60V
0
≤
I
LOAD
≤
10A
HIGH CURRENT RANGE OUT
250mV/A
301
301
5
1
3
LTC6101
2
4
R
SENSE HI
10m
V
LOGIC
BAT54C
LTC1540
Selection of External Input Resistor, R
IN
The external input resistor, R
IN
, controls the transcon-
ductance of the current sense circuit. Since I
OUT
= V
SENSE
/
R
IN
, transconductance g
m
= 1/R
IN
. For example, if R
IN
=
100, then I
OUT
= V
SENSE
/100 or I
OUT
= 1mA for V
SENSE
=
100mV.
R
IN
should be chosen to allow the required resolution while
limiting the output current. At low supply voltage, I
OUT
may
be as much as 1mA. By setting R
IN
such that the largest
expected sense voltage gives I
OUT
= 1mA, then the maxi-
mum output dynamic range is available. Output dynamic
range is limited by both the maximum allowed output
current and the maximum allowed output voltage, as well
as the minimum practical output signal. If less dynamic
range is required, then R
IN
can be increased accordingly,
reducing the max output current and power dissipation.
If low sense currents must be resolved accurately in a
system that has very wide dynamic range, a smaller R
IN
than
the max current spec allows may be used if the max
current is limited in another way, such as with a Schottky
diode across R
SENSE
(Figure 3a). This will reduce the high
current measurement accuracy by limiting the result, while
increasing the low current measurement resolution.
Figure 3b. Dual LTC6101s Allow High-Low Current Ranging
APPLICATIOU
W
U
U
V
+
LOAD
D
SENSE
6101 F03a
R
SENSE
Figure 3a. Shunt Diode Limits Maximum Input Voltage to Allow
Better Low Input Resolution Without Overranging
This approach can be helpful in cases where occasional
large burst currents may be ignored. It can also be used in
a multirange configuration where a low current circuit is
added to a high current circuit (Figure 3b). Note that a
comparator (LTC1540) is used to select the range, and
transistor M1 limits the voltage across R
SENSE LO
.
Care should be taken when designing the board layout for
R
IN,
especially for small R
IN
values. All trace and intercon-
nect impedances will increase the effective R
IN
value,
causing a gain error. In addition, internal device resistance
will add approximately 0.2
to R
IN
.
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC6101ACMS8#PBF 功能描述:IC AMP CURRENT SENSE 8-MSOP RoHS:是 類(lèi)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(lèi)型:電壓反饋 電路數(shù):4 輸出類(lèi)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(lèi)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)
LTC6101ACMS8#TRPBF 功能描述:IC AMP CURRENT SENSE 8-MSOP RoHS:是 類(lèi)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(lèi)型:電壓反饋 電路數(shù):4 輸出類(lèi)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(lèi)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)
LTC6101ACMS8TRPBF 制造商:LINEAR_DIMENSIONS 制造商全稱:LINEAR_DIMENSIONS 功能描述:High Voltage, High-Side Current Sense Amplifi er in SOT-23
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LTC6101ACS5#PBF 制造商:Linear Technology 功能描述:SP Amp Current Sense Amp Single 60V 5-Pin TSOT-23 制造商:Linear Technology 功能描述:CURRENT SENSE AMP 200KHZ 5TS
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