Cypress CY8C24994 Manual De Usuario
CY8C24094, CY8C24794
CY8C24894, CY8C24994
CY8C24894, CY8C24994
Document Number: 38-12018 Rev. *M
Page 33 of 47
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 10-4. 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.
Figure 10-5. 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
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