CY8C24094, CY8C24794
CY8C24894, CY8C24994
Document Number: 38-12018 Rev. *Q Page 27 of 48
10.3.8 DC Analog PSoC Block Specifications
The following table lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V
and -40°C ≤ T
A
≤ 85°C, or 3.0V to 3.6V and -40°C ≤ T
A
≤ 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and
are for design guidance only.
Table 10-12. 3.3V DC Analog Reference Specifications
Symbol Description Min Typ Max Units
BG Bandgap Voltage Reference 1.28 1.30 1.32 V
– AGND = Vdd/2
[5, 6]
Vdd/2 - 0.03 Vdd/2 - 0.01 Vdd/2 + 0.005 V
– AGND = 2 x BandGap
[5, 6]
Not Allowed
– AGND = P2[4] (P2[4] = Vdd/2) P2[4] - 0.008 P2[4] + 0.001 P2[4] + 0.009 V
– AGND = BandGap
[5, 6]
BG - 0.009 BG + 0.005 BG + 0.015 V
– AGND = 1.6 x BandGap
[5, 6]
1.6 x BG - 0.027 1.6 x BG - 0.010 1.6 x BG + 0.018 V
– AGND Column to Column Variation (AGND =
Vdd/2)
[5, 6]
-0.034 0.000 0.034 V
– RefHi = Vdd/2 + BandGap Not Allowed
– RefHi = 3 x BandGap Not Allowed
– RefHi = 2 x BandGap + P2[6] (P2[6] = 0.5V) Not Allowed
– RefHi = P2[4] + BandGap (P2[4] = Vdd/2) Not Allowed
– RefHi = P2[4] + P2[6] (P2[4] = Vdd/2, P2[6] = 0.5V) P2[4] + P2[6] -
0.075
P2[4] + P2[6] -
0.009
P2[4] + P2[6] +
0.057
V
– RefHi = 3.2 x BandGap Not Allowed
– RefLo = Vdd/2 - BandGap Not Allowed
– RefLo = BandGap Not Allowed
– RefLo = 2 x BandGap - P2[6] (P2[6] = 0.5V) Not Allowed
– RefLo = P2[4] – BandGap (P2[4] = Vdd/2) Not Allowed
– RefLo = P2[4]-P2[6] (P2[4] = Vdd/2, P2[6] = 0.5V) P2[4] - P2[6] - 0.048 P2[4]- P2[6] +
0.022
P2[4] - P2[6] +
0.092
V
Table 10-13. DC Analog PSoC Block Specifications
Symbol Description Min Typ Max Units Notes
R
CT
Resistor Unit Value (Continuous Time) – 12.2 – kΩ
C
SC
Capacitor Unit Value (Switched Capacitor) – 80 – fF
Note
5. AGND tolerance includes the offsets of the local buffer in the PSoC block. Bandgap voltage is
1.3V ± 0.02V
.
6. Avoid using P2[4] for digital signaling when using an analog resource that depends on the Analog Reference. Some coupling of the digital signal may appear on the
AGND.
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