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Document Number: 38-12028  Rev. *I

Page 29 of 56

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RefHi = P2[4] + P2[6] (P2[4] = Vdd/2, 
P2[6] = 0.5V)

P2[4] + P2[6] - 0.075 P2[4] + P2[6] - 0.009 P2[4] + P2[6] + 0.057

V

–

RefHi = 3.2 x BandGap

Not Allowed

–

RefLo = Vdd/2 - BandGap

Not Allowed

–

RefLo = BandGap

Not Allowed

–

RefLo = 2 x BandGap - P2[6] (P2[6] = 0.5V)

Not Allowed

–

RefLo = P2[4] – BandGap (P2[4] = Vdd/2)

Not Allowed

–

RefLo = P2[4]-P2[6] (P2[4] = Vdd/2, 
P2[6] = 0.5V)

P2[4] - P2[6] - 0.048

P2[4]- P2[6] + 0.022

P2[4] - P2[6] + 0.092

V

Table 26.  3.3V DC Analog Reference Specifications  (continued)

BG

Bandgap Voltage Reference

1.16

1.30

1.33

V

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AGND = Vdd/2

Vdd/2 - 0.03

Vdd/2 - 0.01

Vdd/2 + 0.01

V

–

AGND = 2 x BandGap

Not Allowed

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AGND = P2[4] (P2[4] = Vdd/2)

P2[4] - 0.01

P2[4]

P2[4] + 0.01

V

–

AGND = BandGap

BG - 0.01

BG

BG + 0.015

V

–

AGND = 1.6 x BandGap

Not Allowed

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AGND Column to Column Variation 
(AGND = Vdd/2)

-0.034

0.000

0.034

mV

–

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] - 0.08

P2[4] + P2[6] - 0.01

P2[4] + P2[6] + 0.06

V

–

RefHi = 3.2 x BandGap

Not Allowed

–

RefLo = Vdd/2 - BandGap

Not Allowed

–

RefLo = BandGap

Not Allowed

–

RefLo = 2 x BandGap - P2[6] (P2[6] = 0.5V)

Not Allowed

–

RefLo = P2[4] – BandGap (P2[4] = Vdd/2)

Not Allowed

–

RefLo = P2[4]-P2[6] (P2[4] = Vdd/2, 
P2[6] = 0.5V)

P2[4] - P2[6] - 0.05

P2[4]- P2[6] + 0.01

P2[4] - P2[6] + 0.09

V