Document Number: 001-53754 Rev. *F Page 23 of 50
Table 13. 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 + 1.200 V
DD
/2 + 1.290 V
DD
/2 + 1.365 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.030 V
DD
/2 V
DD
/2 + 0.034 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.346 V
DD
/2 – 1.292 V
DD
/2 – 1.208 V
RefPower = high
Opamp bias = low
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.196 V
DD
/2 + 1.292 V
DD
/2 + 1.374 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.029 V
DD
/2 V
DD
/2 + 0.031 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.349 V
DD
/2 – 1.295 V
DD
/2 – 1.227 V
RefPower = medium
Opamp bias = high
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.204 V
DD
/2 + 1.293 V
DD
/2 + 1.369 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.030 V
DD
/2 V
DD
/2 + 0.030 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.351 V
DD
/2 – 1.297 V
DD
/2 – 1.229 V
RefPower = medium
Opamp bias = low
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.189 V
DD
/2 + 1.294 V
DD
/2 + 1.384 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.032 V
DD
/2 V
DD
/2 + 0.029 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.353 V
DD
/2 – 1.297 V
DD
/2 – 1.230 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] –
0.105
P2[4] + P2[6] –
0.008
P2[4] + P2[6] +
0.095
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] –
0.035
P2[4] – P2[6] +
0.006
P2[4] – P2[6] +
0.053
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] –
0.094
P2[4] + P2[6] –
0.005
P2[4] + P2[6] +
0.073
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] –
0.033
P2[4] – P2[6] +
0.002
P2[4] – P2[6] +
0.042
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] –
0.094
P2[4] + P2[6] –
0.003
P2[4] + P2[6] +
0.075
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] –
0.035
P2[4] – P2[6] P2[4] – P2[6] +
0.038
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] –
0.095
P2[4] + P2[6] –
0.003
P2[4] + P2[6] +
0.080
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] –
0.038
P2[4] – P2[6] P2[4] – P2[6] +
0.038
V
0b010 RefPower = high
Opamp bias = high
V
REFHI
Ref High V
DD
V
DD
– 0.119 V
DD
– 0.005 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.028 V
DD
/2 V
DD
/2 + 0.029 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.004 V
SS
+ 0.022 V
RefPower = high
Opamp bias = low
V
REFHI
Ref High V
DD
V
DD
– 0.131 V
DD
– 0.004 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.028 V
DD
/2 V
DD
/2 + 0.028 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.003 V
SS
+ 0.021 V
RefPower = medium
Opamp bias = high
V
REFHI
Ref High V
DD
V
DD
– 0.111 V
DD
– 0.003 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.029 V
DD
/2 V
DD
/2 + 0.028 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.002 V
SS
+ 0.017 V
RefPower = medium
Opamp bias = low
V
REFHI
Ref High V
DD
V
DD
– 0.128 V
DD
– 0.003 V
DD
V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.029 V
DD
/2 V
DD
/2 + 0.029 V
V
REFLO
Ref Low V
SS
V
SS
V
SS
+ 0.002 V
SS
+ 0.019 V
(21 Seiten)
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