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OPA388-Q1 bảng dữ liệu(PDF) 18 Page - Texas Instruments |
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OPA388-Q1 bảng dữ liệu(HTML) 18 Page - Texas Instruments |
18 / 31 page Application and Implementation Note Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The OPA388-Q1 is a unity-gain stable, precision operational amplifier free from unexpected output and phase reversal. The use of proprietary zero-drift circuitry gives the benefit of low input offset voltage over time and temperature, as well as lowering the 1/f noise component. As a result of the high PSRR, these devices work well in applications that run directly from battery power without regulation. The OPA388-Q1 is optimized for full rail-to- rail input, allowing for low-voltage, single-supply operation or split-supply use. These miniature, high-precision, low-noise amplifiers offer high-impedance inputs that have a common-mode range 100 mV beyond the supplies without input crossover distortion and a rail-to-rail output that swings within 5 mV of the supplies under normal test conditions. The OPA388-Q1 precision amplifier is designed for upstream analog signal chain applications in low or high gains, as well as downstream signal chain functions such as DAC buffering. 8.2 Typical Application This single-supply, low-side, bidirectional current-sensing solution detects load currents from –1 A to +1 A. The single-ended output spans from 110 mV to 3.19 V. This design uses the OPA388-Q1 because of the low offset voltage and rail-to-rail input and output. One of the amplifiers is configured as a difference amplifier and the other amplifier provides the reference voltage. Figure 8-1 shows the solution. + + ± I LOAD V BUS V OUT V CC V CC V REF + ± V SHUNT V CC U1A U1B R 4 R SHUNT R 1 R 3 R L R 5 R 6 R 2 Figure 8-1. Bidirectional Current-Sensing OPA388-Q1 SBOS989 – AUGUST 2020 www.ti.com 18 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated Product Folder Links: OPA388-Q1 |
Số phần tương tự - OPA388-Q1 |
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Mô tả tương tự - OPA388-Q1 |
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