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参数资料
| 型号： | LT6105HDCB#TRMPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO6 |
| 封装： | 2 X 3 MM, LEAD FREE, PLASTIC, DFN-6 |
| 文件页数： | 5/20页 |
| 文件大小： | 382K |
| 代理商： | LT6105HDCB#TRMPBF |
LT6105
13
6105fa
a 20m
Ω sense resistor to give a 100mV full-scale input
to the LT6105. Input offset voltage will limit resolution to
5mA. Neglecting contact resistance at solder joints, even
one square of PC board copper at each resistor end will
cause an error of 5%. This error will grow proportionately
higher as monitored current levels rise.
Gain Setting
The gain is set with three external resistors, RIN1, RIN2,
ROUT. The gain, ROUT/RIN, can be selected from 1V/V to
100V/V as long as the maximum current does not exceed
1mA. Select Gain = ROUT/RIN2 for sense input voltage op-
eration greater than 1.6V. Select gain = ROUT/RIN1 for sense
input voltage operation less than 1.6V. The overall system
error will depend on the resistor tolerance chosen for the
application. Set RIN1= RIN2 for best accuracy across the
entire input range. The total error will be gain error of the
resistors plus the gain error of the LT6105 device.
Output Signal Range
The LT6105’s output signal is developed by current
through RIN2 (44V > V–IN > 1.6V) or RIN1 (0V < V–IN <
1.6V) conducted to the output resistor, ROUT. This current
is VSENSE/RIN2 or VSENSE/RIN1. The sense amplier’s maxi-
mum output current before gain error begins to increase
APPLICATIONS INFORMATION
is 1mA. This allows low value output resistors to be used
which helps preserve signal accuracy when the output pin
is connected to other systems.
For zero VSENSE, the internal circuitry gain will force VOUT
to VO(MIN) referred to V –. Depending on output currents,
VOUT may swing positive to within VO(MAX) referred to V+
or a maximum of 36V, a limit set by internal junction break-
down. Within these constraints, an amplied, level shifted
representation of RSENSE voltage is developed at VOUT. The
output is well behaved driving capacitive loads.
CM Input Signal Range
The LT6105 has high CMRR over the full input voltage
range. The minimum operation voltage of the sense ampli-
er inputs is 0V whether V+ is at 2.7V or 36V. The output
remains accurate even when the sense inputs are driven
to 44V. The graph in Figure 2 shows that VOS changes very
slightly over a wide input range. Furthermore, either sense
inputs VS+ and VS– can collapse to 0V without incurring any
damage to the device. The LT6105 can handle differential
sense voltages up to 44V. For example, VS+ = 44V and VS– =
0V can be a valid condition in a current monitoring applica-
tion (Figure 3) when an overload protection fuse is blown
and VS– voltage collapses to ground. Under this condition,
the output of the LT6105 goes to the positive rail, VO(MAX).
Figure 2. Input Offset Voltage vs VS+ Input Voltage
Figure 3. Current Monitoring of a Fuse Protected Circuit
OUTPUT
OUT
6105 F03
RSENSE
FUSE
LT6105
VS
–
VS
+
V–
V+
C2
0.1 F
C1
0.1 F
DC SOURCE
(≤ 44V)
5V
TO LOAD
–
+
–IN
+IN
RIN2
ROUT
RIN1
VS
+ INPUT VOLTAGE (V)
0
INPUT
OFFSET
VOL
TAGE
(mV)
0.20
0.40
0.60
35
0
–0.20
10
20
5
15
25
40
30
45
–0.80
–1.00
–0.40
0.80
–0.60
6105 F02
TA = – 40°C
TA = 25°C
TA = 85°C
TA = 125°C
V+ = 12V
VSENSE = 5mV
AV = 50V/V
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT6105HDCB-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Precision, Extended Input Range Current Sense Amplifi er |
| LT6105HMS8#PBF | 功能描述:IC AMP R-R CURRENT SENSE 8-MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| LT6105HMS8#TRPBF | 功能描述:IC AMP R-R CURRENT SENSE 8-MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| LT6105HMS8-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Precision, Extended Input Range Current Sense Amplifi er |
| LT6105HMS8-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Precision, Extended Input Range Current Sense Amplifi er |
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