CY8C24123A
CY8C24223A
CY8C24423A
Document Number: 38-12028 Rev. *V Page 33 of 71
Table 24. 2.7-V DC Analog Reference Specifications
Reference
ARF_CR
[5:3]
Reference Power
Settings
Symbol Reference Description Min Typ Max Units
0b000 All power settings
Not allowed at 2.7 V
––– – – ––
0b001 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]
– 0.739
P2[4] + P2[6] –
0.016
P2[4] + P2[6] +
0.759
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]
– 1.675
P2[4] – P2[6] +
0.013
P2[4] – P2[6] +
1.825
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]
– 0.098
P2[4] + P2[6] –
0.011
P2[4] + P2[6] +
0.067
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]
– 0.308
P2[4] – P2[6] +
0.004
P2[4] – P2[6] +
0.362
V
RefPower = low
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]
– 0.042
P2[4] + P2[6] –
0.005
P2[4] + P2[6] +
0.035
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] +
0.030
V
RefPower = low
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]
– 0.367
P2[4] + P2[6] –
0.005
P2[4] + P2[6] +
0.308
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]
– 0.345
P2[4] – P2[6] P2[4] – P2[6] +
0.301
V
0b010 RefPower = high
Opamp bias = high
V
REFHI
Ref High V
DD
V
DD
– 0.100 V
DD
– 0.003 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.038 V
DD
/2 V
DD
/2 + 0.036 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.005 V
SS
+ 0.016 V
RefPower = high
Opamp bias = low
V
REFHI
Ref High V
DD
V
DD
– 0.065 V
DD
– 0.002 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.025 V
DD
/2 V
DD
/2 + 0.023 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.003 V
SS
+ 0.012 V
RefPower = medium
Opamp bias = high
V
REFHI
Ref High V
DD
V
DD
– 0.054 V
DD
– 0.002 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.024 V
DD
/2 – 0.001 V
DD
/2 + 0.020 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.002 V
SS
+ 0.012 V
RefPower = medium
Opamp bias = low
V
REFHI
Ref High V
DD
V
DD
– 0.042 V
DD
– 0.002 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.027 V
DD
/2 – 0.001 V
DD
/2 + 0.022 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.001 V
SS
+ 0.010 V
RefPower = low
Opamp bias = high
V
REFHI
Ref High V
DD
V
DD
– 0.042 V
DD
– 0.002 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.028 V
DD
/2 – 0.001 V
DD
/2 + 0.023 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.001 V
SS
+ 0.010 V
RefPower = low
Opamp bias = low
V
REFHI
Ref High V
DD
V
DD
– 0.036 V
DD
– 0.002 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.184 V
DD
/2 – 0.001 V
DD
/2 + 0.159 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.001 V
SS
+ 0.009 V
(46 pages)
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