V
參數(shù)資料
型號(hào)： LTC6102HVIDD#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 7/26頁(yè)
文件大小： 0K
描述： IC AMP CURRENT SENSE 8-DFN
標(biāo)準(zhǔn)包裝： 121
放大器類(lèi)型： 電流檢測(cè)
電路數(shù)： 1
增益帶寬積： 200kHz
電流 - 輸入偏壓： 60pA
電壓 - 輸入偏移： 3µV
電流 - 電源： 420µA
電流 - 輸出 / 通道： 1mA
電壓 - 電源，單路/雙路(±)： 5 V ~ 100 V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 8-WFDFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 8-DFN-EP（3x3）
包裝： 管件
LTC6102
LTC6102-1/LTC6102HV
15
6102fd
Figure 5. Second Input R Minimizes
Error Due to Input Bias Current
–INF
VREG
0.1μF
–INS
6102 F05
RIN
+ = RIN– – RSENSE
LTC6102
ROUT
VOUT
V+
LOAD
RSENSE
–
+
V+
V–
OUT
+IN
RIN
–
RIN
+
APPLICATIONS INFORMATION
For instance if IBIAS is 1nA and ROUT is 10k, the output
error is –10μV.
Note that in applications where RSENSE ≈ RIN, IB(+) causes
a voltage offset in RSENSE that cancels the error due to
IB(–) and EOUT(IBIAS) ≈ 0. In applications where RSENSE <
RIN, the bias current error can be similarly reduced if an
external resistor RIN(+) = (RIN – RSENSE) is connected as
shown in Figure 5. Under both conditions:
EOUT(IBIAS) = ± ROUT IOS; IOS = IB(+) – IB(–)
Adding RIN+ as described will maximize the dynamic
range of the circuit. For less sensitive designs, RIN+ is
not necessary.
Ideally, the circuit output is:
VV
R
VR
I
OUT
SENSE
OUT
IN
SENSE
==
;
In this case, the only error is due to resistor mismatch,
which provides an error in gain only.
Output Error, EOUT, Due to the Amplier DC Offset
Voltage, VOS
EOUT(VOS) = VOS (ROUT/RIN)
The DC offset voltage of the amplier adds directly to
the value of the sense voltage, VSENSE. This error is very
small (3μV typ) and may be ignored for reasonable values
of RIN. See Figure 4. For very high dynamic range, this
offset can be calibrated in the system due to its extremely
low drift.
INPUT VOLTAGE (V)
OUTPUT
ERROR
(%)
100
10
1
0.1
0.01
0.001
0.0001
6102 F04
0.00001 0.0001
0.001
0.01
0.1
1
FOR A 500
SHUNT
VIN = 100mV, ISHUNT = 200A
ERROR DUE TO VOS IS 6mA
VIN = 10 V
Figure 4. LTC6102 Output Error Due to Typical Input Offset
vs Input Voltage
Output Error, EOUT, Due to the Bias Currents,
IB(+) and IB(–)
The input bias current of the LTC6102 is vanishingly small.
However, for very high resolution, or at high temperatures
where IB increases due to leakage, the current may be
signicant.
The bias current IB(+) ows into the positive input of the
internal op amp. IB(–) ows into the negative input.
EOUT(IBIAS) = ROUT((IB(+) (RSENSE/RIN) – IB(–))
Since IB(+) ≈ IB(–) = IBIAS, if RSENSE << RIN then,
EOUT(IBIAS) ≈ –ROUT IBIAS
Clock Feedthrough, Input Bias Current
The LTC6102 uses auto-zeroing circuitry to achieve an
almost zero DC offset over temperature, sense voltage,
and power supply voltage. The frequency of the clock
used for auto-zeroing is typically 10kHz. The term clock
feedthrough is broadly used to indicate visibility of this
clock frequency in the op amp output spectrum. There are
typically two types of clock feedthrough in auto zeroed
amps like the LTC6102.
The rst form of clock feedthrough is caused by the
settling of the internal sampling capacitor and is input
referred; that is, it is multiplied by the internal loop gain
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參數(shù)描述
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LTC6102HVIMS8#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:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類(lèi)型:電流檢測(cè) 電路數(shù):1 輸出類(lèi)型:- 轉(zhuǎn)換速率:- 增益帶寬積:125kHz -3db帶寬:- 電流 - 輸入偏壓:- 電壓 - 輸入偏移:100µV 電流 - 電源:1.1µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):- 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:4-WFBGA，CSPBGA 供應(yīng)商設(shè)備封裝:4-UCSP（2x2） 包裝:剪切帶 (CT) 其它名稱(chēng):MAX9634WERS+TCT
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LTC6102HVIMS8-TRPBF 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Precision Zero Drift Current Sense Amplifi er
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