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參數(shù)資料
| 型號： | MAX5491 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Precision-Matched Resistor-Divider in SOT23 |
| 中文描述： | 精密匹配的電阻分壓器，SOT23封裝 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大?。?/td> | 155K |
| 代理商： | MAX5491 |
M
Applications Information
Self-Heating and Error
Applying a voltage across terminals P1 and P2 causes
the device to heat up due to power dissipation. In high-
voltage applications, consider the error in resistance-
ratio temperature coefficient caused by self-heating.
The worst-case self-heating occurs when the operating
voltage attains its maximum value. Approximate the
result of power dissipation under this condition as:
The thermal resistance from junction to ambient,
θ
J-A
,
for a 3-pin SOT23 package is 141°C/W. Calculate the
resulting temperature rise as:
T = 83.3mW x 141°C/W = 11.7°C
If the ratio temperature coefficient is 2ppm/°C (typ), the
total error introduced by self-heating is:
11.7
°
C x 2ppm/
°
C = 23.4ppm
P
V
R
V
k
mW
DISS
MAX
.
=
(
)
=
(
)
=
2
2
50
30
83 3
Precision-Matched Resistor-Divider in SOT23
4
_______________________________________________________________________________________
IN
P1
P2
P3
MAX5491
R
1
R
2
OUT
Figure 3. Buffered Attenuator
MAX5491
R
2
R
1
P1
P2
P3
IN
OUT
Figure 1. Inverting Amplifier Configuration
P1
P2
P3
MAX5491
R
2
R
1
OUT
IN
Figure 4. Attenuator with Buffer
MAX5491
R
2
R
1
P1
P2
P3
IN
OUT
Figure 2. Noninverting Amplifier Configuration
A
V
V
R
R
OUT
IN
=
=
1
2
A
V
V
R
R
OUT
IN
1
=
=
+
1
2
A
V
V
R
+
R
R
OUT
IN
=
=
2
1
2
A
V
V
R
+
R
R
OUT
IN
=
=
2
1
2
Typical Applications
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX5491LA01000-T | Precision-Matched Resistor-Divider in SOT23 |
| MAX5491LB01000-T | Precision-Matched Resistor-Divider in SOT23 |
| MAX5491LC01000-T | Precision-Matched Resistor-Divider in SOT23 |
| MAX5491MA01100-T | Precision-Matched Resistor-Divider in SOT23 |
| MAX5491MB01100-T | Precision-Matched Resistor-Divider in SOT23 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5491LA01000 | 制造商:Maxim Integrated Products 功能描述:PRECISION-MATCHED RESISTOR-DIVIDER - Cut Tape Product |
| MAX5491LA01000+ | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 30KOHM 3PIN SOT-23 - Rail/Tube |
| MAX5491LA01000+T | 功能描述:電阻器網(wǎng)絡(luò)與陣列 Precision Match Res/Divider RoHS:否 制造商:Vishay/Thin Film 產(chǎn)品類型:Networks 電路類型:Divider 電阻器數(shù)量: 電阻數(shù)值:10 kOhms 容差:0.1 % 溫度系數(shù): 管腳數(shù)量:3 工作溫度范圍:- 55 C to + 155 C 尺寸:1.02 mm W x 3.05 mm L x 1.4 mm H 引線間隔: 端接類型:SMD/SMT 封裝:Reel |
| MAX5491LA01000-T | 功能描述:電阻器網(wǎng)絡(luò)與陣列 RoHS:否 制造商:Vishay/Thin Film 產(chǎn)品類型:Networks 電路類型:Divider 電阻器數(shù)量: 電阻數(shù)值:10 kOhms 容差:0.1 % 溫度系數(shù): 管腳數(shù)量:3 工作溫度范圍:- 55 C to + 155 C 尺寸:1.02 mm W x 3.05 mm L x 1.4 mm H 引線間隔: 端接類型:SMD/SMT 封裝:Reel |
| MAX5491LB01000 | 制造商:Maxim Integrated Products 功能描述:PRECISION-MATCHED RESISTOR-DIVIDER - Cut Tape Product |
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