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AMC3301-Q1 Fiches technique(PDF) 20 Page - Texas Instruments |
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AMC3301-Q1 Fiches technique(HTML) 20 Page - Texas Instruments |
20 / 37 page 7.3.3 Analog Output The AMC3301-Q1 offers a differential analog output comprised of the OUTP and OUTN pins. For differential input voltages (VINP – VINN) in the range from –250 mV to 250 mV, the device provides a linear response with a nominal gain of 8.2. For example, for a differential input voltage of 250 mV, the differential output voltage (VOUTP – VOUTN) is 2.05 V. At zero input (INP shorted to INN), both pins output the same common-mode output voltage VCMout, as specified in the Electrical Characteristics table in Section 6. For absolute differential input voltages greater than 250 mV but less than 320 mV, the differential output voltage continues to increase in magnitude but with reduced linearity performance. The outputs saturate at a differential output voltage of VCLIPout as shown in Figure 7-3 if the differential input voltage exceeds the VClipping value. Linear input range (VFSR) Maximum input range before clipping (VClipping) 320 mV 320 mV 250 mV 250 mV 0 VOUTP VOUTN Differential Input Voltage (VINP ± VINN) Common mode output voltage (VCMout) ± ± Clipping output voltage (VCLIPout) Figure 7-3. AMC3301-Q1 Output Behavior The AMC3301-Q1 provides a fail-safe output that simplifies diagnostics on system level. The fail-safe output is active when the integrated DC/DC converter doesn't deliver the required supply voltage on the secondary side of the device. Figure 7-4 and Figure 7-5 illustrate the fail-safe output of the AMC3301-Q1 that is a negative differential output voltage value that does not occur under normal operating conditions. Use the maximum VFAILSAFE voltage specified in the Electrical Characteristics table in Section 6 as a reference value for the fail- safe detection on system level. -2.492 V VOUTN VOUTP Figure 7-4. Typical Negative Clipping Output of the AMC3301-Q1 AMC3301-Q1 SBASA73 – JULY 2020 www.ti.com 20 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated Product Folder Links: AMC3301-Q1 |
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