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參數(shù)資料
| 型號(hào)： | MAX5490UA07538-T |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 100k зPrecision-Matched Resistor-Divider in SOT23 |
| 中文描述： | 10萬зPrecision匹配電阻分壓器采用SOT23 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 111K |
| 代理商： | MAX5490UA07538-T |
M
100k
Prec ision-Matc hed Resistor-Divider in
S OT 23
4
_______________________________________________________________________________________
Detailed Desc ription
As shown in the
Block Diagram
, the MAX5490 consists
of two precision, low-ratio-drift resistors with an end-to-
end resistance of 100k
(R
1
+ R
2
). P3 is the set point
of the divider. The maximum working voltage of the
MAX5490 is 80V. This device offers a wide range of
resistance ratios (R
1
/R
2
) from 1:1 to 100:1 and is ideal
for precision operational amplifier gain/attenuation con-
trol. A maximum initial ratio accuracy of 0.035% and a
low 1ppm/
°
C ratio drift enhance system accuracy.
Applic ations Information
S elf-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 = 64mW x 141°C/W = 9.02°C
If the ratio temperature coefficient is 1ppm/°C (typ), the
total error introduced by self-heating is:
9.02
°
C x 1ppm/
°
C = 9.02ppm
P
V
R
V
k
mW
DISS
MAX
=
(
)
=
(
)
=
2
2
80
100
64
Pin Desc ription
PIN
1
2
3
NAME
P1
P2
P3
FUNCTION
R
1
Connection Terminal
R
2
Connection Terminal
Set-Point Connection Terminal
1000
10
1
100
1k
100
FREQUENCY (Hz)
N
√
H
)
10
SPECTRAL NOISE DENSITY
M
RATIO1:1
SIGNAL CONNECTED TOP2
P1 GROUNDED
V
P1-P2
= 10V
V
P1-P2
= 2V
100
10
1
0.1
0.01
0.001
0.0001
10
1k
10k
100
100k
THD+N RESPONSE
M
FREQUENCY (Hz)
T
1:1 RATIO
20Hz TO20kHz BANDPASS
Typic al Operating Charac teristic s (c ontinued)
(V
P1-P2
= 10V, T
A
= +25°C, unless otherwise noted.)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5490VA10000 | 制造商:Maxim Integrated Products 功能描述:100KOHMS PRECISION-MATCHED RESISTOR-DIVIDER I - Cut Tape Product |
| MAX5490VA10000+ | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 100KOHM 3PIN SOT-23 - Rail/Tube |
| MAX5490VA10000+T | 功能描述:電阻器網(wǎng)絡(luò)與陣列 100kOhm 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 |
| MAX5490VA10000-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 |
| MAX5490VB10000 | 制造商:Maxim Integrated Products 功能描述:100KOHMS PRECISION-MATCHED RESISTOR - Cut Tape Product |
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