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August 3, 2004
Document No. 38-12012 Rev. *I
24
CY8C27x43 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
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.
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 3-11. Silicon Revision A – 5V DC Analog Reference Specifications
Symbol
BG
–
Description
Min
Typ
Max
Units
Bandgap Voltage Reference
AGND = Vdd/2
a
AGND = 2 x BandGap
a
AGND = P2[4] (P2[4] = Vdd/2)
a
AGND = BandGap
a
AGND = 1.6 x BandGap
a
AGND Block to Block Variation (AGND = Vdd/2)
a
RefHi = Vdd/2 + BandGap
1.274
Vdd/2 - 0.030
1.30
Vdd/2 - 0.004
1.326
Vdd/2 + 0.003
V
V
a. AGND tolerance includes the offsets of the local buffer in the PSoC block.
–
2 x BG - 0.043
2 x BG - 0.010
2 x BG + 0.024
V
–
P2[4] - 0.013
P2[4]
P2[4] + 0.014
V
–
BG - 0.009
BG
BG + 0.009
V
–
1.6 x BG - 0.018
1.6 x BG
1.6 x BG + 0.018
V
–
-0.034
0.000
0.034
V
–
Vdd
/2 + BG - 0.140
3 x BG - 0.112
2 x BG + P2[6] - 0.113
P2[4] + BG - 0.130
P2[4] + P2[6] - 0.133
3.2 x BG - 0.112
Vdd
/2 - BG - 0.051
BG - 0.082
2 x BG - P2[6] - 0.084
P2[4] - BG - 0.056
P2[4] - P2[6] - 0.057
Vdd
/2 + BG - 0.018
3 x BG - 0.018
2 x BG + P2[6] - 0.018
P2[4] + BG - 0.016
P2[4] + P2[6] - 0.016
3.2 x BG
Vdd
/2 - BG
+
0.024
BG + 0.023
2 x BG - P2[6] + 0.025
P2[4] - BG + 0.026
P2[4] - P2[6] + 0.026
Vdd
/2 + BG + 0.103
3 x BG + 0.076
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 + 0.098
BG + 0.129
2 x BG - P2[6] + 0.134
P2[4] - BG + 0.107
P2[4] - P2[6] + 0.110
V
–
–
–
–
–
–
RefHi = 3 x BandGap
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
RefLo = Vdd/2 – BandGap
V
V
V
V
V
V
–
–
–
–
RefLo = BandGap
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)
V
V
V
V
Table 3-12. Silicon Revision B – 5V DC Analog Reference Specifications
Symbol
BG
–
Description
Min
Typ
Max
Units
Bandgap Voltage Reference
AGND = Vdd/2
a
AGND = 2 x BandGap
a
AGND = P2[4] (P2[4] = Vdd/2)
a
AGND = BandGap
a
AGND = 1.6 x BandGap
a
AGND Block to Block Variation (AGND = Vdd/2)
a
RefHi = Vdd/2 + BandGap
1.28
Vdd/2 - 0.030
1.30
Vdd/2
1.32
Vdd/2 + 0.007
V
V
a. AGND tolerance includes the offsets of the local buffer in the PSoC block.
–
2 x BG - 0.043
2 x BG
2 x BG + 0.024
V
–
P2[4] - 0.011
P2[4]
P2[4] + 0.011
V
–
BG - 0.009
BG
BG + 0.009
V
–
1.6 x BG - 0.018
1.6 x BG
1.6 x BG + 0.018
V
–
-0.034
0.000
0.034
V
–
Vdd
/2 + BG - 0.1
3 x BG - 0.06
2 x BG + P2[6] - 0.06
P2[4] + BG - 0.06
P2[4] + P2[6] - 0.06
3.2 x BG - 0.06
Vdd
/2 - BG - 0.051
BG - 0.06
2 x BG - P2[6] - 0.04
P2[4] - BG - 0.056
P2[4] - P2[6] - 0.056
Vdd
/2 + BG - 0.01
3 x BG - 0.01
2 x BG + P2[6] - 0.01
P2[4] + BG - 0.01
P2[4] + P2[6] - 0.01
3.2 x BG - 0.01
Vdd
/2 - BG
+
0.01
BG + 0.01
2 x BG - P2[6] + 0.01
P2[4] - BG + 0.01
P2[4] - P2[6] + 0.01
Vdd
/2 + BG + 0.1
3 x BG + 0.06
2 x BG + P2[6] + 0.06
P2[4] + BG + 0.06
P2[4] + P2[6] + 0.06
3.2 x BG + 0.06
Vdd
/2 - BG + 0.06
BG + 0.06
2 x BG - P2[6] + 0.04
P2[4] - BG + 0.056
P2[4] - P2[6] + 0.056
V
–
–
–
–
–
–
RefHi = 3 x BandGap
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
RefLo = Vdd/2 – BandGap
V
V
V
V
V
V
–
–
–
–
RefLo = BandGap
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)
V
V
V
V