ADuCM320

Data Sheet

Rev. C | Page 26 of 30

Pin

No.

Mnemonic

Type1

Description

D11

IOVDD2

S

3.3 V GPIO Supply and Interdie Communications.

J1

IOVDD3

S

3.3 V GPIO Supply.

C1

IOGND1

S

Ground for IOVDD1.

E11

IOGND2

S

Ground for IOVDD2.

K1

IOGND3

S

Ground for IOVDD3 and Interdie Communications.

J5

AGND1

S

Analog Ground for VDD1.

K7

AGND2

S

ESD Ground for Pad Ring.

L7

AGND3

S

Ground for AVDD3.

H11

AGND4

S

Ground for AVDD4, AVDD_REG0, and AVDD_REG1.

K6

VDD1

S

3.3 V Supply for Digital Die.

L6

AVDD3

S

VDAC and IDAC Supply (3.3 V).

G11

AVDD4

S

ADC Supply (3.3 V).

L11

ADC_REFN

AO/A

Decoupling Capacitor Connection for ADC Reference Buffer. Connect this pin to

AGND4.

K11

ADC_REFP

AO/A

Decoupling Capacitor Connection for ADC Reference Buffer. Connect this pin to

a 4.7 µF capacitor to the ADC_REFN pin. ADC_REFP can be overdriven by an

external reference.

H2

XTALO

O

Output from the Crystal Oscillator Inverter. When not using an external crystal,

leave XTALO unconnected.

J2

XTALI

I

Input to the Crystal Oscillator Inverter and Input to the Internal Clock Generator

Circuits. When not using an external crystal, connect XTALI to DGND.

1

AI is analog input, AO is analog output, I is digital input, O is digital output, S is supply.