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参数资料
| 型号： | LTC6101ACS5#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO5 |
| 封装： | LEAD FREE, PLASTIC, MO-193, TSOT-23, 5 PIN |
| 文件页数： | 2/20页 |
| 文件大小： | 250K |
| 代理商： | LTC6101ACS5#PBF |
LTC6101/LTC6101HV
10
6101fg
APPLICATIONS INFORMATION
6101 F03b
–
+
–
+
–
+
R5
7.5k
VIN
301
VOUT
ILOAD
LTC6101
RSENSE LO
100m
M1
Si4465
10k
CMPZ4697
7.5k
VIN
1.74M
4.7k
Q1
CMPT5551
40.2k
3
4
5
6
1
2
8
7
619k
HIGH
RANGE
INDICATOR
(ILOAD > 1.2A)
VLOGIC
(3.3V TO 5V)
LOW CURRENT RANGE OUT
2.5V/A
(V
LOGIC +5V
) ≤ V
IN ≤ 60V
0 ≤ ILOAD ≤ 10A
HIGH CURRENT RANGE OUT
250mV/A
301
LTC6101
RSENSE HI
10m
VLOGIC
BAT54C
LTC1540
V+
V–
OUT
–IN
+IN
V+
V–
OUT
–IN
+IN
Selection of External Input Resistor, RIN
The external input resistor, RIN, controls the transconduc-
tance of the current sense circuit. Since IOUT = VSENSE/RIN,
transconductance gm=1/RIN.Forexample,ifRIN=100,then
IOUT = VSENSE/100 or IOUT = 1mA for VSENSE = 100mV.
RIN should be chosen to allow the required resolution
while limiting the output current. At low supply voltage,
IOUT may be as much as 1mA. By setting RIN such that
the largest expected sense voltage gives IOUT = 1mA, then
the maximum 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 RIN 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 RIN
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 RSENSE (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
V+
LOAD
DSENSE
6101 F03a
RSENSE
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 conguration 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 RSENSE LO.
Care should be taken when designing the board layout
for RIN, especially for small RIN values. All trace and inter-
connect impedances will increase the effective RIN value,
causing a gain error. In addition, internal device resistance
will add approximately 0.2Ω to RIN.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6101ACS5TRMPBF | 制造商:Linear Technology 功能描述: |
| LTC6101AHMS8 | 制造商:Linear Technology 功能描述:SP Amp Current Sense Amp Single 60V 8-Pin MSOP |
| LTC6101AHMS8#PBF | 功能描述:IC AMP CURRENT SENSE 8-MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:1.8 V/µs 增益带宽积:6.5MHz -3db带宽:4.5MHz 电流 - 输入偏压:5nA 电压 - 输入偏移:100µV 电流 - 电源:65µA 电流 - 输出 / 通道:35mA 电压 - 电源，单路/双路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| LTC6101AHMS8#TR | 制造商:Linear Technology 功能描述:SP Amp Current Sense Amp Single 60V 8-Pin MSOP T/R |
| LTC6101AHMS8#TRPBF | 功能描述:IC AMP CURRENT SENSE 8-MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SO 包装:带卷 (TR) |
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