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| 型号： | MAX4073TAXK+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC AMP CURRENT SENSE SC70-5 |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 放大器类型： | 电流检测 |
| 电路数： | 1 |
| -3db带宽： | 1.8MHz |
| 电流 - 输入偏压： | 40µA |
| 电压 - 输入偏移： | 1000µV |
| 电流 - 电源： | 500µA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 28 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-TSSOP（5 引线），SC-88A，SOT-353 |
| 供应商设备封装： | SC-70-5 |
| 包装： | 标准包装 |
| 产品目录页面： | 1387 (CN2011-ZH PDF) |
| 其它名称： | MAX4073TAXK+TDKR |
MAX4073T/F/H
Low-Cost, SC70, Voltage-Output,
High-Side Current-Sense Amplifier
8
Maxim Integrated
somewhat better, and low-inductance metal-film resis-
tors are best suited for these applications.
For VSENSE = 100mV, full-scale output voltage can be
2V, 5V, or 10V depending on the gain. For proper oper-
ation, ensure VCC exceeds the full-scale output voltage
by 1.2V (see Output High Voltage (VCC - VOH) vs.
Temperature in the
Typical Operating Characteristics).
Using a PCB Trace as RSENSE
If the cost of RSENSE is an issue and accuracy is not
critical, use the alternative solution shown in Figure 2.
This solution uses copper PC board traces to create a
sense resistor. The resistivity of a 0.1-inch-wide trace of
2-ounce copper is approximately 30m/ft. The resis-
tance-temperature coefficient of copper is fairly high
(approximately 0.4%/°C), so systems that experience a
wide temperature variance must compensate for this
effect. In addition, do not exceed the maximum power
dissipation of the copper trace.
For example, the MAX4073T (with a maximum load cur-
rent of 10A and an RSENSE of 5m) creates a full-scale
VSENSE of 50mV that yields a maximum VOUT of 1V.
RSENSE in this case requires about 2 inches of 0.1 inch-
wide copper trace.
Output Impedance
The output of the MAX4073 is a current source driving a
12k resistance. Resistive loading added to OUT
reduces the output gain of the MAX4073. To minimize
output errors for most applications, connect OUT to a
high-impedance input stage. When output buffering is
required, choose an op amp with a common-mode
input range and an output voltage swing that includes
ground when operating with a single supply. The op
amp’s supply voltage range should be at least as high
as any voltage the system may encounter.
The percent error introduced by output loading is deter-
mined with the following formula:
where RLOAD is the external load applied to OUT.
Current Source Circuit
Figure 3 shows a block diagram using the MAX4073
with a switching regulator to make a current source.
%
100
R
12k
R
1
ERROR
LOAD
=
+
MAX4073T
VSENSE
RSENSE
+3V TO +28V
0.1F
RS+
+
0.3in COPPER
INPUT
LOAD/BATTERY
0.3in COPPER
0.1in COPPER
RS-
GND
OUT
VCC
_
Figure 2. MAX4073T Connections Showing Use of PC Board
Figure 3. Current Source
MAX4073T/F/H
RSENSE
ILOAD
+2V TO +28V
VSENSE
VCC
OUT
VIN
GND
RS+
+3V TO +28V
0.1F
RS-
LOAD/
BATTERY
LOW-COST
SWITCHING
REGULATOR
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4074 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Micropower, SOT23, Rail-to-Rail, Fixed-Gain, GainAmp/Open-Loop Op Amps |
| MAX4074__ESA | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Micropower, SOT23, Rail-to-Rail, Fixed-Gain, GainAmp/Open-Loop Op Amps |
| MAX4074__EUK- | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Micropower, SOT23, Rail-to-Rail, Fixed-Gain, GainAmp/Open-Loop Op Amps |
| MAX4074ABESA | 功能描述:运算放大器 - 运放 RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| MAX4074ABEUK-T | 功能描述:运算放大器 - 运放 RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
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