CY8C24x23 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 ≤ T ≤ 85°C, or 3.0V to 3.6V and -40°C ≤ T ≤ 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and
A
A
are for design guidance only or unless otherwise specified.
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.
Table 3-11. 5V DC Analog Reference Specifications
Symbol
Description
Bandgap Voltage Reference
Min
Typ
Max
Units
BG
–
1.274
1.30
1.326
V
V
a
AGND = Vdd/2
Vdd/2 - 0.043
2 x BG - 0.048
P2[4] - 0.013
BG - 0.009
Vdd/2 - 0.025
2 x BG - 0.030
P2[4]
Vdd/2 + 0.003
2 x BG + 0.024
P2[4] + 0.014
BG + 0.016
CT Block Power = High
a
–
–
–
–
–
AGND = 2 x BandGap
V
V
V
V
V
V
CT Block Power = High
a
AGND = P2[4] (P2[4] = Vdd/2)
CT Block Power = High
a
AGND = BandGap
BG + 0.008
1.6 x BG - 0.010
0.000
CT Block Power = High
a
AGND = 1.6 x BandGap
1.6 x BG - 0.022
-0.034
1.6 x BG + 0.018
0.034
CT Block Power = High
a
AGND Column to Column Variation (AGND = Vdd/2)
CT Block Power = High
–
–
–
–
–
–
–
RefHi = Vdd/2 + BandGap
Ref Control Power = High
Vdd/2 + BG - 0.140
3 x BG - 0.112
Vdd/2 + BG - 0.018
3 x BG - 0.018
Vdd/2 + BG + 0.103
3 x BG + 0.076
RefHi = 3 x BandGap
Ref Control Power = High
V
V
V
V
V
V
RefHi = 2 x BandGap + P2[6] (P2[6] = 1.3V)
Ref Control Power = High
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
RefHi = P2[4] + BandGap (P2[4] = Vdd/2)
Ref Control Power = High
RefHi = P2[4] + P2[6] (P2[4] = Vdd/2, P2[6] = 1.3V)
Ref Control Power = High
RefHi = 3.2 x BandGap
Ref Control Power = High
RefLo = Vdd/2 – BandGap
Ref Control Power = High
Vdd/2 - BG - 0.051
BG - 0.082
Vdd/2 - BG + 0.024
BG + 0.023
Vdd/2 - BG + 0.098
BG + 0.129
–
–
–
–
RefLo = BandGap
Ref Control Power = High
V
V
V
V
RefLo = 2 x BandGap - P2[6] (P2[6] = 1.3V)
Ref Control Power = High
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
RefLo = P2[4] – BandGap (P2[4] = Vdd/2)
Ref Control Power = High
RefLo = P2[4]-P2[6] (P2[4] = Vdd/2, P2[6] = 1.3V)
Ref Control Power = High
a. AGND tolerance includes the offsets of the local buffer in the PSoC block. Bandgap voltage is 1.3V ± 2%.
June 4, 2004
Document No. 38-12011 Rev. *F
22
CYPRESS [ CYPRESS ]
