Cypress CY8C23433, CY8C23533 manual Typical Agnd Noise with P24 Bypass

CY8C23433, CY8C23533

When bypassed by a capacitor on P2[4], the noise of the analog ground signal distributed to each block is reduced by a factor of up to 5 (14 dB). This is at frequencies above the corner frequency defined by the on-chip 8.1k resistance and the external capacitor.

Figure 15. Typical AGND Noise with P2[4] Bypass

dBV/rtHz
10000						0
						0.01
						0.1
						1.0
						10
1000
100
0.001	0.01	0.1	Freq (kHz)	1	10	100

At low frequencies, the opamp noise is proportional to 1/f, power independent, and determined by device geometry. At high frequencies, increased power level reduces the noise spectrum level.

Figure 16. Typical Opamp Noise

nV/rtHz
10000						PH_BH
						PH_BL
						PM_BL
						PL_BL
1000
100
10
0.001	0.01	0.1	Freq (kHz)	1	10	100

Document Number: 001-44369 Rev. *B Page 29 of 37

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