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參數(shù)資料
| 型號： | ZXCT1020E5TA |
| 廠商： | Diodes Inc |
| 文件頁數(shù)： | 11/14頁 |
| 文件大小： | 1161K |
| 描述： | IC CURRENT MONITOR 1% SOT23-5 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 功能： | 電流監(jiān)控器 |
| 檢測方法： | 高端 |
| 精確度： | ±1% |
| 輸入電壓： | 2.5 V ~ 20 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SC-74A，SOT-753 |
| 供應(yīng)商設(shè)備封裝： | SOT-23-5 |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 1478 (CN2011-ZH PDF) |
| 其它名稱： | ZXCT1020E5DKR |
ZXCT1020
Issue 1 - August 2007
11
www.zetex.com
?Zetex Semiconductors plc 2007
Application information
The ZXCT1020 has a V
B
pin that is used to provide power to the current monitor. The maximum
voltage applied to the ZXCT1020 must be applied to this pin. The S+ and S- pins are used to
measure the current flowing to the load through the sense resistor. In normal use, the S+ is tied
to V
B
via a shunt resistor, R
H
making the ZXCT1020 essentially line powered.
The ZXCT1020 has a programmable gain set by the ratio of two external resistors R
G
and R
SH
.
R
SH
sets the transconductance whereas R
G
set the gain and results in an output voltage defined
as:
Where V
SENSE
= R
SENSE
x I
L
The ZXCT1020 has been tested to the same conditions as the ZXCT1021 giving an overall voltage
gain of 10. The gain of the ZXCT1020 can be adjusted simply by varying R
G
. So to achieve a gain
of 50 R
G
is increased from 15k to 75k. An alternative is to decrease R
SH
from 1.5k to 300.
Decreasing R
SH
increases the transconductance and, if for any given gain, reducing the R
SH
will
reduce the overall output impedance.
To achieve a gain of 100, for example, the following resistor values could be used:
R
SH
= 150 R
G
= 15k
S+
S-
(LOAD)
V
B
I
L
R
SH
R
S
GND
V
OUT
5
4
-
+
1
ZXCT1020
2
3
R
G
OUT
R
G
R
SH
---------- V
SENSE
?/DIV>
=
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| ZXCT1021 | 制造商:DIODES 制造商全稱:Diodes Incorporated 功能描述:Low offset high-side current monitor |
| ZXCT1021_06 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:Low offset high-side current monitor |
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| ZXCT1022 | 制造商:DIODES 制造商全稱:Diodes Incorporated 功能描述:Low offset high-side current monitor |
| ZXCT1022_07 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:Low offset high-side current monitor |
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