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參數資料
| 型號： | AD8218BRMZ-R7 |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 11/16頁 |
| 文件大小： | 354K |
| 描述： | IC CURRENT MONITOR BI-DIR 8MSOP |
| 標準包裝： | 1,000 |
| 功能： | 電流監控器 |
| 檢測方法： | 高端 |
| 精確度： | ±0.35% |
| 輸入電壓： | 4 V ~ 80 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 8-MSOP |
| 包裝： | 帶卷 (TR) |
Data Sheet
AD8218
Rev. B | Page 11 of 16
APPLICATION NOTES
SUPPLY (V
S
) CONNECTIONS
The AD8218 includes an internal LDO, which allows the user
to leave the VS pin floating, powering the AD8218 directly from
the voltage present at Pin 1 (+IN), provided this voltage is in the
4 V to 80 V range. A typical connection for the part in this
configuration is shown in Figure 29.
+IN
I
LOAD
V
S
SHUNT
GND
IN
REF
LOAD
4V
TO
80V
2.5V
ATTERY
AD8218
OUT
I
CHARGE
ENB
Figure 29. Operation with No VS Connection
The AD8218 can also be powered from a separate low impedance
supply at Pin 2 (V
S
); however, this voltage can only be in the 4 V
to 5.5 V range. In cases where the high voltage bus is susceptible
to noise, transients, or high voltage fluctuations and a 5 V supply is
available, the AD8218 can be used in the mode depicted in
Figure 30.
+IN
I
LOAD
V
S
SHUNT
GND
IN
REF
LOAD
4V
TO
80V
ATTERY
AD8218
OUT
I
CHARGE
ENB
5V
2.5V
C
F
Figure 30. 5 V Supply Operation
ENABLE PIN (ENB) OPERATION
The AD8218 includes an internal reference that can be enabled
by connecting Pin 3 (ENB) to ground. This mode of operation
is shown in Figure 31.
+IN
I
LOAD
V
S
SHUNT
GND
IN
REF
LOAD
4V
TO
80V
ATTERY
AD8218
OUT
ENB
Figure 31. Enabling the Internal 80 mV Reference
In this configuration, the internal 80 mV reference is activated,
and the output of the AD8218 is 80 mV when the differential
input voltage is 0 V and the voltage at Pin 7 (REF) is also 0 V . This
internal reference is useful in unidirectional current measurements
where the current being monitored has a very wide range. Setting
the output starting point to 80 mV means that when the load
current through the shunt resistor is 0 A, the output is 80 mV.
This ensures that the output errors due to initial offset and the
output saturation range of the amplifier are overcome. In this
mode, the transfer function of the AD8218 becomes
OUT (V) = OUT (V) = (20 ?VIN) + 0.08 V
If Pin 3 is connected to ground, and therefore the internal
reference is enabled, 80 mV must always be added to the
transfer function of the AD8218.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8218BRMZ-RL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Zero Drift, Bidirectional Current Shunt Monitor |
| AD8219 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Zero Drift, Unidirectional Current Shunt Monitor |
| AD8219BRMZ | 功能描述:IC CURRENT MONITOR UNI-DIR 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩流/電流管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 功能:電流開關 檢測方法:- 精確度:±10% 輸入電壓:1.7 V ~ 5.5 V 電流 - 輸出:600mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-UFQFN 供應商設備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
| AD8219BRMZ_PROMO | 制造商:Analog Devices 功能描述:IC CURRENT MONITOR UNI-DIR |
| AD8219BRMZ-RL | 功能描述:IC CURRENT MONITOR UNI-DIR 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩流/電流管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 功能:電流開關 檢測方法:- 精確度:±10% 輸入電壓:1.7 V ~ 5.5 V 電流 - 輸出:600mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-UFQFN 供應商設備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
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