Datasheet AS2333 (Diodes) - 9
| 制造商 | Diodes |
| 描述 | 1.8V, Micropower CMOS Zero-Drift Operational Amplifiers |
| 页数 / 页 | 14 / 9 — AS2333. Application Information. Low-Side Current Monitor Application. … |
| 文件格式/大小 | PDF / 788 Kb |
| 文件语言 | 英语 |
AS2333. Application Information. Low-Side Current Monitor Application. Figure 8. Low-Side Current Monitor Application
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AS2333 Application Information
(continued)
Low-Side Current Monitor Application
Low-side current sensing is used to monitor the current through a load. This method can be used to detect over-current conditions and is often used in feedback control, as shown in Figure 8. A sense resistor is placed in series with the load to ground. Precision resistors are required for high accuracy and the resulting voltage drop is amplified using AS2333.
Figure 8. Low-Side Current Monitor Application Differential Amplifier for Bridged Circuits
Sensors to measure strain, pressure, and temperature are often configured in a Wheatstone bridge circuit as shown in Figure 9. In the measurement, the voltage change that is produced is relatively small and needs to be amplified before going into an ADC. Precision amplifiers are recommended in these types of applications due to their high gain, low noise, and low offset voltage.
Figure 9. Bridge Circuit Amplification
AS2333 9 of 14 June 2020 Document number: DS42770 Rev. 2 - 2
www.diodes.com
© Diodes Incorporated
(continued)
Low-Side Current Monitor Application
Low-side current sensing is used to monitor the current through a load. This method can be used to detect over-current conditions and is often used in feedback control, as shown in Figure 8. A sense resistor is placed in series with the load to ground. Precision resistors are required for high accuracy and the resulting voltage drop is amplified using AS2333.
Figure 8. Low-Side Current Monitor Application Differential Amplifier for Bridged Circuits
Sensors to measure strain, pressure, and temperature are often configured in a Wheatstone bridge circuit as shown in Figure 9. In the measurement, the voltage change that is produced is relatively small and needs to be amplified before going into an ADC. Precision amplifiers are recommended in these types of applications due to their high gain, low noise, and low offset voltage.
Figure 9. Bridge Circuit Amplification
AS2333 9 of 14 June 2020 Document number: DS42770 Rev. 2 - 2
www.diodes.com
© Diodes Incorporated