Datasheet > INA117BM-3

INA117BM-3

更新时间： 2024-01-29 07:23:37

品牌	Logo	应用领域
德州仪器 - TI		放大器
页数	文件大小	规格书
17页	312K
描述
High Common-Mode Voltage DIFFERENCE AMPLIFIER

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数据手册

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INA117BM-3 数据手册

MEASURING CURRENT

V–

V+

The INA117 can be used to measure a current by sensing the

voltage drop across a series resistor, R_S. Figure 4 shows the

INA117 used to measure the supply currents of a device

under test. The circuit in Figure 5 measures the output

current of a power supply. If the power supply has a sense

connection, it can be connected to the output side of R_Sto

eliminate the voltage-drop error. Another common applica-

tion is current-to-voltage conversion, as shown in Figure 6.

(+200V max)

+V_S

380kΩ

R_S

R_C*

V_O= R_SI_DUT+

I_DUT+

21.1kΩ

20kΩ

V–

V+

Device

Under

Test

380kΩ

V₂

V+

V–

I_DUT–

V_O= V₃– V₂

V₃

380kΩ

R_C*

21.1kΩ

20kΩ

R_S

380kΩ

V_O= R_SI_DUT–

200Ω

CMR

21.1kΩ

20kΩ

Adjust

10Ω

–V_S

(–200V max)

If offset adjust is also required,

connect to offset circuit, Figure 2.

*Not needed if R_Sis less than 20Ω —see text.

FIGURE 3. CMR Trim Circuit.

FIGURE 4. Measuring Supply Currents of Device Under

Test.

V–

V+

Power Supply

Out

Sense

380kΩ

±200V max

R_S

R_C*

V_O= I_LR_S

Optional Load

I_L

Sense Connection

(see text)

21.1kΩ

20kΩ

Load

*R_C= R_Snot needed if R_Sis less than 20Ω—see text.

FIGURE 5. Measuring Power Supply Output Current.

INA117

SBOS154A

1...4 5 678 9 10...17

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