Cypress CY8C23433 Manual De Usuario
CY8C23433, CY8C23533
Document Number: 001-44369 Rev. *B
Page 29 of 37
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.
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
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.
frequencies, increased power level reduces the noise spectrum level.
Figure 16. Typical Opamp Noise
100
1000
10000
0.001
0.01
0.1
1
10
100
Freq (kHz)
dBV/rtHz
0
0.01
0.1
1.0
10
0.01
0.1
1.0
10
10
100
1000
10000
0.001
0.01
0.1
1
10
100
Freq (kHz)
nV/rtHz
PH_BH
PH_BL
PM_BL
PL_BL
PH_BL
PM_BL
PL_BL