CY8C24123A
CY8C24223A
CY8C24423A
Document Number: 38-12028 Rev. *V Page 31 of 71
Table 23. 3.3-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 + 1.170 V
DD
/2 + 1.288 V
DD
/2 + 1.376 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.098 V
DD
/2 + 0.003 V
DD
/2 + 0.097 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.386 V
DD
/2 – 1.287 V
DD
/2 – 1.169 V
RefPower = high
Opamp bias = low
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.210 V
DD
/2 + 1.290 V
DD
/2 + 1.355 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.055 V
DD
/2 + 0.001 V
DD
/2 + 0.054 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.359 V
DD
/2 – 1.292 V
DD
/2 – 1.214 V
RefPower = medium
Opamp bias = high
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.198 V
DD
/2 + 1.292 V
DD
/2 + 1.368 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.041 V
DD
/2 V
DD
/2 + 0.04 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.362 V
DD
/2 – 1.295 V
DD
/2 – 1.220 V
RefPower = medium
Opamp bias = low
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.202 V
DD
/2 + 1.292 V
DD
/2 + 1.364 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.033 V
DD
/2 V
DD
/2 + 0.030 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.364 V
DD
/2 – 1.297 V
DD
/2 – 1.222 V
0b001 RefPower = high
Opamp bias = high
V
REFHI
Ref High P2[4]+P2[6] (P2[4] =
V
DD
/2, P2[6] = 0.5 V)
P2[4] + P2[6]
– 0.072
P2[4] + P2[6] –
0.017
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] = 0.5 V)
P2[4] – P2[6]
– 0.029
P2[4] – P2[6] +
0.010
P2[4] – P2[6] +
0.048
V
RefPower = high
Opamp bias = low
V
REFHI
Ref High P2[4]+P2[6] (P2[4] =
V
DD
/2, P2[6] = 0.5 V)
P2[4] + P2[6]
– 0.066
P2[4] + P2[6] –
0.010
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] = 0.5 V)
P2[4] – P2[6]
– 0.024
P2[4] – P2[6] +
0.004
P2[4] – P2[6] +
0.034
V
RefPower = medium
Opamp bias = high
V
REFHI
Ref High P2[4]+P2[6] (P2[4] =
V
DD
/2, P2[6] = 0.5 V)
P2[4] + P2[6]
– 0.073
P2[4] + P2[6] –
0.007
P2[4] + P2[6] +
0.053
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] = 0.5 V)
P2[4] – P2[6]
– 0.028
P2[4] – P2[6] +
0.002
P2[4] – P2[6] +
0.033
V
RefPower = medium
Opamp bias = low
V
REFHI
Ref High P2[4]+P2[6] (P2[4] =
V
DD
/2, P2[6] = 0.5 V)
P2[4] + P2[6]
– 0.073
P2[4] + P2[6] –
0.006
P2[4] + P2[6] +
0.056
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] = 0.5 V)
P2[4] – P2[6]
– 0.030
P2[4] – P2[6] P2[4] – P2[6] +
0.032
V
0b010 RefPower = high
Opamp bias = high
V
REFHI
Ref High V
DD
V
DD
– 0.102 V
DD
– 0.003 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.040 V
DD
/2 + 0.001 V
DD
/2 + 0.039 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.005 V
SS
+ 0.020 V
RefPower = high
Opamp bias = low
V
REFHI
Ref High V
DD
V
DD
– 0.082 V
DD
– 0.002 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.031 V
DD
/2 V
DD
/2 + 0.028 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.003 V
SS
+ 0.015 V
RefPower = medium
Opamp bias = high
V
REFHI
Ref High V
DD
V
DD
– 0.083 V
DD
– 0.002 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.032 V
DD
/2 – 0.001 V
DD
/2 + 0.029 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.002 V
SS
+ 0.014 V
RefPower = medium
Opamp bias = low
V
REFHI
Ref High V
DD
V
DD
– 0.081 V
DD
– 0.002 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.033 V
DD
/2 – 0.001 V
DD
/2 + 0.029 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.002 V
SS
+ 0.013 V
0b011 All power settings
Not allowed at 3.3 V
––– – – ––
(46 pages)
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