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CS5374 Scheda tecnica(PDF) 6 Page - Cirrus Logic |
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CS5374 Scheda tecnica(HTML) 6 Page - Cirrus Logic |
6 / 44 page CS5374 CS5374 DS862PP1 6 DS862PP1 ANALOG CHARACTERISTICS (CONT.) Notes: 9. The upper bandwidth limit is determined by the selected digital filter cut-off frequency. 10. Anti-alias capacitors are discrete external components and must be of good quality (C0G, NPO, poly). Poor-quality capacitors will degrade total harmonic distortion (THD) performance. See Figure 1 for external anti-alias filter connections. 11. Maximum integrated noise over the measurement bandwidth for the voltage reference device attached to the VREF inputs. Parameter Symbol Min Typ Max Unit Modulator Inputs Input Signal Frequencies (Note 9) VBW DC - 2000 Hz Full-scale Differential AC Input VAC -- 5 Vpp Full-scale Differential DC Input VDC -2.5 - 2.5 VDC Input Common Mode Voltage VCM - (VA-)+2.5 -V Input Voltage Range (Vcm ±Signal) VRNG (VA-)+0.7 - (VA+)-1.25 V Differential Input Impedance INR± INF± ZDIFINR ZDIFINF - - 20 1 - - k Ω M Ω Single-ended Input Impedance INR± INF± ZSEINR ZSEINF - - 40 2 - - k Ω M Ω External Anti-alias Filter Series Resistance (Note 10) Differential Capacitance RAA CDIFF - - 680 20 - - Ω nF VREF Inputs [VREF+] - [VREF-] (Note 2, 3) VREF - 2.500 - V VREF- (Note 4)VREF- - VA - - V VREF Input Current VREFII -120 - µA VREF Input Noise (Note 11)VREFIN -- 1 µVrms MODULATOR INR+ INF+ INF- INR- 20nF C0G 20nF C0G 680 AMPLIFIER OUT+ OUT- 680 680 680 CS5374 Figure 1. External Anti-alias Filter Components |
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