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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST-PLC-AFE 데이터시트(PDF) 9 Page - STMicroelectronics |
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ST-PLC-AFE 데이터시트(HTML) 9 Page - STMicroelectronics |
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9 / 58 page  DocID028727 Rev 1 9/58 ST-PLC-AFE General description 58 2.1 PA block The PA block has a low-pass filter response when configured with a gain of 6.9 V/V. The PA is specified to operate from 7 V to 14 V and can deliver up to 1.65 A of continuous output current over the specified junction temperature range of -40 °C to 125 °C. In differential mode, both PAs are turned on (see Figure 3). In single-ended configuration, the N side of the PA is turned off and its output is placed into high impedance. This is achieved by setting the PA2_EN bit in the Enable register to 0 (see Figure 3). Figure 3. PA equivalent circuit 2.1.1 Typical connections to the PA Connecting the PA in a typical PLC application requires an input AC coupling capacitor, C_IN_PA (see Figure 5 and Figure 7). This capacitor introduces a single-pole, high-pass characteristic to the PA transfer function; combined with the inherent low-pass transfer function, this characteristic results in a pass band response. Figure 4 shows the impact of this coupling capacitor. |
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