參數(shù)資料
型號(hào)： LTC6101CHS5#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 2/22頁(yè)
文件大?。?/td> 0K
描述： IC AMP CURRENT SENSE TSOT23-5
標(biāo)準(zhǔn)包裝： 2,500
放大器類型： 電流檢測(cè)
電路數(shù)： 1
增益帶寬積： 200kHz
電流 - 輸入偏壓： 100nA
電壓 - 輸入偏移： 400µV
電流 - 電源： 375µA
電流 - 輸出 / 通道： 1mA
電壓 - 電源，單路/雙路(±)： 4 V ~ 60 V
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： SOT-23-5 細(xì)型，TSOT-23-5
供應(yīng)商設(shè)備封裝： TSOT-23-5
包裝： 帶卷 (TR)
LTC6101/LTC6101HV
10
6101fh
APPLICATIONS INFORMATION
Figure 2. Kelvin Input Connection Preserves
Accuracy Despite Large Load Current
LTC6101
ROUT
VOUT
6101 F02
RIN
V+
LOAD
RSENSE
–
+
V+
V–
OUT
–IN
+IN
Useful Gain Congurations
Gain
RIN
ROUT
VSENSE at VOUT = 5V IOUT at VOUT = 5V
20
499
10k
250mV
500μA
50
200
10k
100mV
500μA
100
10k
50mV
500μA
Selection of External Current Sense Resistor
The external sense resistor, RSENSE, has a signicant 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 RSENSE. As a result, the sense resis-
tor 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
reproduced signal, and is limited primarily by input DC
offset of the internal amplier of the LTC6101. In addition,
RSENSE must be small enough that VSENSE does not exceed
the maximum input voltage specied 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,
RSENSE should be no more than 50mΩ.
Once the maximum RSENSE 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 150μV. If the minimum current is 20mA, a
sense resistor of 7.5mΩ will set VSENSE to 150μV. 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 50mΩ RSENSE willmaximizethedynamicrange
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 5mΩ sense resistor is
employed, then the effective current error is 30mA, while
the peak sense voltage is reduced to 10mV at 2A, dis-
sipating only 20mW.
The low offset and corresponding large dynamic range of
the LTC6101 make it more exible than other solutions in
this respect. The 150μV typical offset gives 60dB of dy-
namic 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 ap-
plications. Solder connections and PC board interconnec-
tions that carry high current can cause signicant error
in measurement due to their relatively large resistances.
One 10mm x 10mm square trace of one-ounce copper
is approximately 0.5mΩ. A 1mV error can be caused by
as little as 2A owing 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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LTC6101CIS5#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:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR)
LTC6101CIS5#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:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR)
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