CY8C24x23A Final Data Sheet
3. Electrical Specifications
3.3.6
DC Analog Reference Specifications
The following tables list guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V
and -40°C ≤ TA ≤ 85°C, 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, or 2.4V to 3.0V and -40°C ≤ TA ≤ 85°C, respectively. Typical parameters
apply to 5V, 3.3V, and 2.7V at 25°C and are for design guidance only.
The guaranteed specifications are measured through the Analog Continuous Time PSoC blocks. The power levels for AGND refer to
the power of the Analog Continuous Time PSoC block. The power levels for RefHi and RefLo refer to the Analog Reference Control
register. The limits stated for AGND include the offset error of the AGND buffer local to the Analog Continuous Time PSoC block.
Reference control power is high.
Table 3-14. 5V DC Analog Reference Specifications
Symbol
Description
Bandgap Voltage Reference
Min
Typ
Max
Units
BG
–
1.28
1.30
1.33
V
V
V
AGND = Vdd/2
Vdd/2 - 0.04
Vdd/2 - 0.01
Vdd/2 + 0.007
2 x BG + 0.024
–
2 x BG - 0.048
2 x BG - 0.030
AGND = 2 x BandGap
AGND = P2[4] (P2[4] = Vdd/2)
AGND = BandGap
–
–
–
–
–
P2[4] - 0.011
BG - 0.009
1.6 x BG - 0.022
-0.034
P2[4]
P2[4] + 0.011
BG + 0.016
1.6 x BG + 0.018
0.034
V
V
V
V
V
BG + 0.008
1.6 x BG - 0.010
0.000
AGND = 1.6 x BandGap
AGND Block to Block Variation (AGND = Vdd/2)
RefHi = Vdd/2 + BandGap
Vdd/2 + BG - 0.10
3 x BG - 0.06
Vdd/2 + BG
Vdd/2 + BG + 0.10
3 x BG + 0.06
–
–
–
–
–
–
RefHi = 3 x BandGap
3 x BG
V
V
V
V
V
V
RefHi = 2 x BandGap + P2[6] (P2[6] = 1.3V)
RefHi = P2[4] + BandGap (P2[4] = Vdd/2)
RefHi = P2[4] + P2[6] (P2[4] = Vdd/2, P2[6] = 1.3V)
RefHi = 3.2 x BandGap
2 x BG + P2[6] - 0.113
P2[4] + BG - 0.130
P2[4] + P2[6] - 0.133
3.2 x BG - 0.112
2 x BG + P2[6] - 0.018
P2[4] + BG - 0.016
P2[4] + P2[6] - 0.016
3.2 x BG
2 x BG + P2[6] + 0.077
P2[4] + BG + 0.098
P2[4] + P2[6]+ 0.100
3.2 x BG + 0.076
Vdd/2 - BG + 0.04
BG + 0.06
RefLo = Vdd/2 – BandGap
Vdd/2 - BG - 0.04
BG - 0.06
Vdd/2 - BG + 0.024
BG
–
–
–
–
RefLo = BandGap
V
V
V
V
RefLo = 2 x BandGap - P2[6] (P2[6] = 1.3V)
RefLo = P2[4] – BandGap (P2[4] = Vdd/2)
RefLo = P2[4]-P2[6] (P2[4] = Vdd/2, P2[6] = 1.3V)
2 x BG - P2[6] - 0.084
P2[4] - BG - 0.056
P2[4] - P2[6] - 0.057
2 x BG - P2[6] + 0.025
P2[4] - BG + 0.026
P2[4] - P2[6] + 0.026
2 x BG - P2[6] + 0.134
P2[4] - BG + 0.107
P2[4] - P2[6] + 0.110
Table 3-15. 3.3V DC Analog Reference Specifications
Symbol
BG
Description
Bandgap Voltage Reference
Min
1.28
Typ
1.30
Max
1.33
Units
V
V
–
–
AGND = Vdd/2
Vdd/2 - 0.03
Vdd/2 - 0.01
Vdd/2 + 0.005
Not Allowed
P2[4] - 0.008
BG - 0.009
AGND = 2 x BandGap
–
–
AGND = P2[4] (P2[4] = Vdd/2)
P2[4] + 0.001
BG + 0.005
P2[4] + 0.009
BG + 0.015
V
V
AGND = BandGap
–
–
1.6 x BG - 0.027
-0.034
1.6 x BG - 0.010
0.000
1.6 x BG + 0.018
0.034
V
AGND = 1.6 x BandGap
mV
AGND Column to Column Variation (AGND = Vdd/2)
RefHi = Vdd/2 + BandGap
–
–
–
–
–
–
–
–
–
–
–
Not Allowed
RefHi = 3 x BandGap
Not Allowed
RefHi = 2 x BandGap + P2[6] (P2[6] = 0.5V)
RefHi = P2[4] + BandGap (P2[4] = Vdd/2)
RefHi = P2[4] + P2[6] (P2[4] = Vdd/2, P2[6] = 0.5V)
RefHi = 3.2 x BandGap
Not Allowed
Not Allowed
P2[4] + P2[6] - 0.075
Not Allowed
P2[4] + P2[6] - 0.009
P2[4] + P2[6] + 0.057
V
RefLo = Vdd/2 - BandGap
Not Allowed
RefLo = BandGap
Not Allowed
RefLo = 2 x BandGap - P2[6] (P2[6] = 0.5V)
RefLo = P2[4] – BandGap (P2[4] = Vdd/2)
RefLo = P2[4]-P2[6] (P2[4] = Vdd/2, P2[6] = 0.5V)
Not Allowed
Not Allowed
P2[4] - P2[6] - 0.048
P2[4]- P2[6] + 0.022
P2[4] - P2[6] + 0.092
V
September 8, 2004
Document No. 38-12028 Rev. *B
25
CYPRESS [ CYPRESS ]
