參數(shù)資料
型號(hào)： LTC6102HDD-1#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 10/26頁(yè)
文件大?。?/td> 0K
描述： IC AMP CURRENT SENSE 8-DFN
標(biāo)準(zhǔn)包裝： 2,500
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(±)： 4 V ~ 60 V
工作溫度： -40°C ~ 125°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： 帶卷 (TR)
LTC6102
LTC6102-1/LTC6102HV
18
6102fd
Figure 10. Additional Resistor R3 Protects
Output During Supply Reversal
APPLICATIONS INFORMATION
6102 F10
LTC6102
R2
4.99k
D1
R1
100Ω
RSENSE
–
+
V+
V–
OUT
+IN
VBATT
R3
1k
–INF
–INS
VREG
0.1μF
L
O
A
D
ADC
the allowed output current. The gain is still controlled by
ROUT/RIN, so either gain or attenuation may be applied to
the input signal as it is translated to the output. Finally,
the input may be a voltage source rather than a sense
resistor, as shown in Figure 8. This circuit allows the
translation of a wide variety of input signals across the
entire supply range of the LTC6102 with only a tiny offset
error while retaining simple gain control set by ROUT/RIN.
Again, very large voltages may be sensed as long as RIN
is chosen so that IOUT does not exceed the allowed output
current. For example, VIN may be as large as 1V with RIN =
1k, or as large as 10V with RIN = 10k. For a 10V maximum
input and a 5V maximum output, RIN = 10k and ROUT = 5k
will allow the LTC6102HV to translate VIN to VOUT with a
common mode voltage of up to 100V. For the case where
a large input resistor is used, a similar resistor in series
with +IN will reduce error due to input bias current.
Figure 8. Voltage Level-Shift Circuit
Figure 9. Schottky Prevents Damage During Supply Reversal
–INF
–INS
LTC6102
ROUT
VOUT
6102 F08
RIN
VIN
VCM
V+
V–
OUT
+IN
VREG
0.1μF
–
+
VOUT = VIN
ROUT
RIN
6102 F09
LTC6102
R2
4.99k
D1
R1
100Ω
VBATT
RSENSE
V+
V–
–INF
OUT
–INS
+IN
VREG
0.1μF
L
O
A
D
–
+
Reverse Supply Current
Some applications may be tested with reverse-polarity
supplies due to an expectation of this type of fault during
operation. The LTC6102 is not protected internally from
external reversal of supply polarity. To prevent damage
that may occur during this condition, a Schottky diode
should be added in series with V– (Figure 9). This will
limit the reverse current through the LTC6102. Note that
this diode will limit the low voltage performance of the
LTC6102 by effectively reducing the supply voltage to the
part by VD.
In addition, if the output of the LTC6102 is wired to a device
that will effectively short it to high voltage (such as through
an ESD protection clamp) during a reverse supply condi-
tion, the LTC6102’s output should be connected through
a resistor or Schottky diode (Figure 10).
Response Time
The LTC6102 is designed to exhibit fast response to inputs
for the purpose of circuit protection or signal transmission.
This response time will be affected by the external circuit
in two ways, delay and speed.
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