CY8C24994 Datasheet, PDF (26/46 Pages) Cypress Semiconductor – PSoC® Programmable System-on-Chip™

CY8C24094, CY8C24794
CY8C24894, CY8C24994
10.3.7 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 10-11. 5V DC Analog Reference Specifications
Symbol
Description
Min
Typ
Max
Units
BG
Bandgap Voltage Reference
1.28
1.30
1.32
V
–
AGND = Vdd/2^{[6, 7]}
Vdd/2 - 0.04
Vdd/2 - 0.01
Vdd/2 + 0.007
V
–
AGND = 2 x BandGap^{[6, 7]}
2 x BG - 0.048
2 x BG - 0.030
2 x BG + 0.024 V
–
AGND = P2[4] (P2[4] = Vdd/2)^{[6, 7]}
P2[4] - 0.011
P2[4]
P2[4] + 0.011
V
–
AGND = BandGap^{[6, 7]}
BG - 0.009
BG + 0.008
BG + 0.016
V
–
AGND = 1.6 x BandGap^{[6, 7]}
1.6 x BG - 0.022 1.6 x BG - 0.010 1.6 x BG + 0.018 V
–
AGND Block to Block Variation (AGND = Vdd/2)^{[6, 7]} -0.034
0.000
0.034
V
–
RefHi = Vdd/2 + BandGap
Vdd/2 + BG - 0.10 Vdd/2 + BG
Vdd/2 + BG + 0.10 V
–
RefHi = 3 x BandGap
3 x BG - 0.06
3 x BG
3 x BG + 0.06
V
–
RefHi = 2 x BandGap + P2[6] (P2[6] = 1.3V)
2 x BG + P2[6] - 2 x BG + P2[6] - 2 x BG + P2[6] + V
0.113
0.018
0.077
–
RefHi = P2[4] + BandGap (P2[4] = Vdd/2)
P2[4] + BG - 0.130 P2[4] + BG - 0.016 P2[4] + BG + 0.098 V
–
RefHi = P2[4] + P2[6] (P2[4] = Vdd/2, P2[6] = 1.3V) P2[4] + P2[6] -
P2[4] + P2[6] -
P2[4] + P2[6]+
V
0.133
0.016
0.100
–
RefHi = 3.2 x BandGap
3.2 x BG - 0.112 3.2 x BG
3.2 x BG + 0.076 V
–
RefLo = Vdd/2 – BandGap
Vdd/2 - BG - 0.04 Vdd/2 - BG + 0.024 Vdd/2 - BG + 0.04 V
–
RefLo = BandGap
BG - 0.06
BG
BG + 0.06
V
–
RefLo = 2 x BandGap - P2[6] (P2[6] = 1.3V)
2 x BG - P2[6] - 2 x BG - P2[6] + 2 x BG - P2[6] + V
0.084
0.025
0.134
–
RefLo = P2[4] – BandGap (P2[4] = Vdd/2)
P2[4] - BG - 0.056 P2[4] - BG + 0.026 P2[4] - BG + 0.107 V
–
RefLo = P2[4]-P2[6] (P2[4] = Vdd/2, P2[6] = 1.3V) P2[4] - P2[6] -
P2[4] - P2[6] +
P2[4] - P2[6] +
V
0.057
0.026
0.110
Table 10-12. 3.3V DC Analog Reference Specifications
Symbol
Description
Min
BG
Bandgap Voltage Reference
–
AGND = Vdd/2^{[6, 7]}
–
AGND = 2 x BandGap^{[6, 7]}
1.28
Vdd/2 - 0.03
Not Allowed
–
AGND = P2[4] (P2[4] = Vdd/2)
–
AGND = BandGap^{[6, 7]}
–
AGND = 1.6 x BandGap^{[6, 7]}
P2[4] - 0.008
BG - 0.009
1.6 x BG - 0.027
–
AGND Column to Column Variation (AGND =
-0.034
Vdd/2)^{[6, 7]}
–
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
Typ
1.30
Vdd/2 - 0.01
P2[4] + 0.001
BG + 0.005
1.6 x BG - 0.010
0.000
P2[4] + P2[6] -
0.009
Max
1.32
Vdd/2 + 0.005
Units
V
V
P2[4] + 0.009
V
BG + 0.015
V
1.6 x BG + 0.018 V
0.034
V
P2[4] + P2[6] + V
0.057
Document Number: 38-12018 Rev. *L
Page 26 of 46
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