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參數(shù)資料
| 型號： | MAX4073FAXK+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 11/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP CURRENT SENSE SC70-5 |
| 其它有關文件： | Automotive Product Guide |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1 |
| 放大器類型： | 電流檢測 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 1.7MHz |
| 電流 - 輸入偏壓： | 40µA |
| 電壓 - 輸入偏移： | 1000µV |
| 電流 - 電源： | 500µA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 28 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 6-TSSOP（5 引線），SC-88A，SOT-353 |
| 供應商設備封裝： | SC-70-5 |
| 包裝： | 標準包裝 |
| 產品目錄頁面： | 1387 (CN2011-ZH PDF) |
| 其它名稱： | MAX4073FAXK+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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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4073HAUT | 制造商:Maxim Integrated Products 功能描述:VOLTAGE-OUTPUT, HIGH-SIDE CURRENT-SENSE AMPLIFIER - Rail/Tube |
| MAX4073HAUT+ | 制造商:Maxim Integrated Products 功能描述:SP AMP CURRENT SENSE AMP SGL 28V 6PIN SOT-23 - Rail/Tube |
| MAX4073HAUT+T | 功能描述:電流靈敏放大器 Voltage-Output High Side Crnt-Sense Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| MAX4073HAUT-T | 功能描述:電流靈敏放大器 Voltage-Output High Side Crnt-Sense Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| MAX4073HAXK | 制造商:Maxim Integrated Products 功能描述:VOLTAGE-OUTPUT, HIGH-SIDE CURRENT-SENSE AMPLIFIER - Rail/Tube |
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