- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2157 > MAX4172ESA+T (Maxim Integrated Products)IC AMP CURRENT SENSE 8-SOIC PDF資料下載
參數(shù)資料
| 型號： | MAX4172ESA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP CURRENT SENSE 8-SOIC |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 放大器類型： | 電流檢測 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 800kHz |
| 電流 - 輸入偏壓： | 50µA |
| 電壓 - 輸入偏移： | 1000µV |
| 電流 - 電源： | 800µA |
| 電流 - 輸出 / 通道： | 1.75mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 32 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
MAX4172
Low-Cost, Precision, High-Side
Current-Sense Amplifier
7
Maxim Integrated
Accuracy: A high RSENSE value allows lower cur-
rents to be measured more accurately. This is
because offsets become less significant when the
sense voltage is larger. For best performance,
select RSENSE to provide approximately 100mV of
sense voltage for the full-scale current in each
application.
Efficiency and Power Dissipation: At high current
levels, the I2R losses in RSENSE can be significant.
Take this into consideration when choosing the
resistor value and its power dissipation (wattage)
rating. Also, the sense resistor’s value might drift if it
is allowed to heat up excessively.
Inductance: Keep inductance low if ISENSE has a
large high-frequency component. Wire-wound resis-
tors have the highest inductance, while metal film is
somewhat better. Low-inductance metal-film resis-
tors are also available. Instead of being spiral
wrapped around a core, as in metal-film or wire-
wound resistors, they are a straight band of metal
and are available in values under 1
.
Cost: If the cost of RSENSE is an issue, you might
want to use an alternative solution, as shown in
Figure 2. This solution uses the PCB traces to create
a sense resistor. Because of the inaccuracies of the
copper resistor, the full-scale current value must be
adjusted with a potentiometer. Also, copper’s resis-
tance temperature coefficient is fairly high (approxi-
mately 0.4%/°C).
In Figure 2, assume that the load current to be mea-
sured is 10A, and that you have determined a 0.3-inch-
wide, 2-ounce copper to be appropriate. The resistivity
of 0.1-inch-wide, 2-ounce (70m thickness) copper is
30m
/ft. For 10A, you might want RSENSE = 5m for a
50mV drop at full scale. This resistor requires about 2
inches of 0.1-inch-wide copper trace.
Current-Sense Adjustment
(Resistor Range, Output Adjust)
Choose ROUT after selecting RSENSE. Choose ROUT to
obtain the full-scale voltage you require, given the full-
scale IOUT determined by RSENSE. OUT’s high imped-
ance permits using ROUT values up to 200k
with
minimal error. OUT’s load impedance (e.g., the input of
an op amp or ADC) must be much greater than ROUT
(e.g., 100 x ROUT) to avoid degrading measurement
accuracy.
High-Current Measurement
The MAX4172 can achieve high-current measurements
by using low-value sense resistors, which can be paral-
leled to further increase the current-sense limit. As an
alternative, PCB traces can be adjusted over a wide
range.
3.48
100
1
3.48
OUTPUT
RESISTOR, ROUT
(k
)
3.48
0.348
10
3.48
FULL-SCALE
OUTPUT
VOLTAGE, VOUT (V)
0.696
20
5
34.8
FULL-SCALE
LOAD CURRENT
(A)
SCALE FACTOR,
VOUT/ISENSE (V/A)
1000
0.1
CURRENT-SENSE
RESISTOR,
RSENSE (m)
Table 1. Suggested Component Values
OUT
GND
1
O.1 in. COPPER
VSENSE
RSENSE
INPUT
LOAD/BATTERY
VSUPPLY
ROUT
O.3 in. COPPER
2
8
RS+
RS-
V+
3V TO 32V
MAX4172
6
5
Figure 2. MAX4172 Connections Showing Use of PC Board
相關PDF資料 |
PDF描述 |
|---|---|
| MAX4173TEUT-T | IC AMP HISIDE CURR V-OUT SOT23-6 |
| MAX4174AOEUK+T | IC OPAMP SGL/DUAL FIXED SOT23-5 |
| MAX4181EUT+T | IC AMP CURRENT SENSE SOT23-6 |
| MAX4197ESA | IC AMP INSTR PREC R-TO-R 8-SOIC |
| MAX4198ESA+T | IC AMP DIFF PREC R-R 8-SOIC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4172EUA | 功能描述:電流靈敏放大器 Precision High-Side Current-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 |
| MAX4172EUA+ | 功能描述:電流靈敏放大器 Precision High-Side Current-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 |
| MAX4172EUA+T | 功能描述:電流靈敏放大器 Precision High-Side Current-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 |
| MAX4172EUA-T | 功能描述:電流靈敏放大器 Precision High-Side Current-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 |
| MAX4172EXA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PLASTIC ENCAPSULATED DEVICES |
發(fā)布緊急采購，3分鐘左右您將得到回復。