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Cypress Semiconductor CY8C24423A Especificaciones Pagina 20

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CY8C24223A, CY8C24423A
Document Number: 001-52469 Rev. *H Page 20 of 50
DC Analog Reference Specifications
The following tables list the guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75 V to
5.25 V and –40 °C T
A
85 °C, 3.0 V to 3.6 V and –40 °C T
A
85 °C, respectively. Typical parameters apply to 5 V and 3.3 V 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.
Note 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.
Table 16. 5-V DC Analog Reference Specifications
Reference
ARF_CR
[5:3]
Reference Power
Settings
Symbol Reference Description Min Typ Max Units
0b000 RefPower = high
Opamp bias = high
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.136 V
DD
/2 + 1.288 V
DD
/2 + 1.409 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.138 V
DD
/2 + 0.003 V
DD
/2 + 0.132 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.417 V
DD
/2 – 1.289 V
DD
/2 – 1.154 V
RefPower = high
Opamp bias = low
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.202 V
DD
/2 + 1.290 V
DD
/2 + 1.358 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.055 V
DD
/2 + 0.001 V
DD
/2 + 0.055 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.369 V
DD
/2 – 1.295 V
DD
/2 – 1.218 V
RefPower = medium
Opamp bias = high
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.211 V
DD
/2 + 1.292 V
DD
/2 + 1.357 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.055 V
DD
/2 V
DD
/2 + 0.052 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.368 V
DD
/2 – 1.298 V
DD
/2 – 1.224 V
RefPower = medium
Opamp bias = low
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.215 V
DD
/2 + 1.292 V
DD
/2 + 1.353 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.040 V
DD
/2 – 0.001 V
DD
/2 + 0.033 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.368 V
DD
/2 – 1.299 V
DD
/2 – 1.225 V
0b001 RefPower = high
Opamp bias = high
V
REFHI
Ref High P2[4]+P2[6] (P2[4] =
V
DD
/2, P2[6] = 1.3 V)
P2[4] + P2[6]
– 0.076
P2[4] + P2[6] –
0.021
P2[4] + P2[6] +
0.041
V
V
AGND
AGND P2[4] P2[4] P2[4] P2[4] –
V
REFLO
Ref Low P2[4]–P2[6] (P2[4] =
V
DD
/2, P2[6] = 1.3 V)
P2[4] – P2[6]
– 0.025
P2[4] – P2[6] +
0.011
P2[4] – P2[6] +
0.085
V
RefPower = high
Opamp bias = low
V
REFHI
Ref High P2[4]+P2[6] (P2[4] =
V
DD
/2, P2[6] = 1.3 V)
P2[4] + P2[6]
– 0.069
P2[4] + P2[6] –
0.014
P2[4] + P2[6] +
0.043
V
V
AGND
AGND P2[4] P2[4] P2[4] P2[4] –
V
REFLO
Ref Low P2[4]–P2[6] (P2[4] =
V
DD
/2, P2[6] = 1.3 V)
P2[4] – P2[6]
– 0.029
P2[4] – P2[6] +
0.005
P2[4] – P2[6] +
0.052
V
RefPower = medium
Opamp bias = high
V
REFHI
Ref High P2[4]+P2[6] (P2[4] =
V
DD
/2, P2[6] = 1.3 V)
P2[4] + P2[6]
– 0.072
P2[4] + P2[6] –
0.011
P2[4] + P2[6] +
0.048
V
V
AGND
AGND P2[4] P2[4] P2[4] P2[4] –
V
REFLO
Ref Low P2[4]–P2[6] (P2[4] =
V
DD
/2, P2[6] = 1.3 V)
P2[4] – P2[6]
– 0.031
P2[4] – P2[6] +
0.002
P2[4] – P2[6] +
0.057
V
RefPower = medium
Opamp bias = low
V
REFHI
Ref High P2[4]+P2[6] (P2[4] =
V
DD
/2, P2[6] = 1.3 V)
P2[4] + P2[6]
– 0.070
P2[4] + P2[6] –
0.009
P2[4] + P2[6] +
0.047
V
V
AGND
AGND P2[4] P2[4] P2[4] P2[4] –
V
REFLO
Ref Low P2[4]–P2[6] (P2[4] =
V
DD
/2, P2[6] = 1.3 V)
P2[4] – P2[6]
– 0.033
P2[4] – P2[6] +
0.001
P2[4] – P2[6] +
0.039
V
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