ADC12DL080 datasheet(5/24 Pages) NSC

5 / 24 page

Pin Descriptions and Equivalent Circuits (Continued)

Pin No.

Symbol

Equivalent Circuit

Description

ANALOG POWER

9, 18, 19,

62, 63

Positive analog supply pins. These pins should be connected

to a quiet +3.3V source and bypassed to AGND with 0.1 µF

capacitors located near the power pins, and with a 10 µF

capacitor.

3, 8, 10, 17,

20, 61, 64

AGND

The ground return for the analog supply.

DIGITAL POWER

33, 48

Positive digital supply pin. This pin should be connected to the

same quiet +3.3V source as is V

A and be bypassed to DGND

with a 0.1 µF capacitor located near the power pins, and with a

10 µF capacitor.

32, 49

DGND

The ground return for the digital supply.

30, 51

Positive driver supply pin for the ADC12DL080’s output drivers.

This pin should be connected to a voltage source of +2.4V to

D and be bypassed to DRGND with a 0.1 µF capacitor. This

supply should also be bypassed with a 10 µF capacitor. V

should never exceed the voltage on V

D. All 0.1 µF bypass

capacitors should be located near the supply pin.

23, 31, 40,

50, 58

DRGND

The ground return for the digital supply for the ADC12DL080’s

output drivers. These pins should be connected to the system

digital ground, but not be connected in close proximity to the

ADC12DL080’s DGND or AGND pins. See Section 5 (Layout

and Grounding) for more details.

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