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AS1713 датащи(PDF) 12 Page - ams AG |
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AS1713 датащи(HTML) 12 Page - ams AG |
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12 / 17 page ![]() www.austriamicrosystems.com/Audio/OpAmps/AS1713 Revision 1.03 11 - 16 AS1713 Datasheet - Application In form atio n Differential Input / Output Buffer Figure 25. Differential Input / Output Buffer Rail-to-Rail Input Stage The AS1713 CMOS op amps have parallel connected n- and p-channel differential input stages that combine to accept a common-mode range extending to both supply rails. The n-channel stage is active for common-mode input voltages typically greater than (VSS + 1.2V), and the p- channel stage is active for common-mode input voltages typically less than (VDD - 1.2V). Rail-to-Rail Output Stage The minimum output is within millivolts of ground for single- supply operation, where the load is referenced to ground (VSS). Figure 26 shows the input voltage range and the output voltage swing of an AS1713 connected as a voltage follower. The maximum output voltage swing is load dependent although it is guaranteed to be within 500mV of the positive rail (VDD = 2.7V) even with maximum load (32 Ω to ground) as shown in Figure 27. AS1713 SENSE OUT REF INN EN INP VDD VSS AS1713 SENSE OUT REF INN EN INP VDD VSS VOUT Differential Output VIN Differential Input VDD/2 + – R1 R2 R3 R4 + – R1 R2 R3 R4 |
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