AD9690 datasheet(13/79 Pages) AD

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AD9690

Data Sheet

Rev. B | Page 12 of 78

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

AD9690

TOP VIEW

(Not to Scale)

AVDD1

AVDD2

AVDD3

VIN–A

VIN+A

AVDD3

AVDD2

V_1P0

SPIVDD

PDWN/STBY

DVDD

DGND

AVDD1

AVDD2

AVDD3

DNC

AVDD3

AVDD2

SPIVDD

CSB

SCLK

SDIO

DVDD

DGND

NOTES

1. EXPOSED PAD. THE EXPOSED THERMAL PAD ON THE BOTTOM OF THE

PACKAGE PROVIDES THE GROUND REFENCE FOR AVDDx. THIS EXPOSED

PAD MUST BE CONNECTED TO GROUND FOR PROPER OPERATION.

2. DNC = DO NOT CONNECT.

Figure 5. Pin Configuration (Top View)

Table 8. Pin Function Descriptions

Pin No.

Mnemonic

Type

Description

Power Supplies

EPAD

Ground

Exposed Pad. The exposed thermal pad on the bottom of the

package provides the ground reference for AVDDx. This

exposed pad must be connected to ground for proper

operation.

1, 2, 47, 48, 49, 52, 55, 61, 64

AVDD1

Supply

Analog Power Supply (1.25 V Nominal).

3, 8, 9, 10, 11, 39, 40, 41,

46, 50, 51, 62, 63

AVDD2

Supply

Analog Power Supply (2.5 V Nominal).

4, 7, 42, 45

AVDD3

Supply

Analog Power Supply (3.3 V Nominal).

13, 38

SPIVDD

Supply

Digital Power Supply for SPI (1.8 V to 3.3 V).

15, 34

DVDD

Supply

Digital Power Supply (1.25 V Nominal).

16, 33

DGND

Ground

Ground Reference for DVDD.

18, 31

DRGND

Ground

Ground Reference for DRVDD.

19, 30

DRVDD

Supply

Digital Driver Power Supply (1.25 V Nominal).

56, 60

AGND1

Ground

Ground Reference for SYSREF±.

AVDD1_SR1

Supply

Analog Power Supply for SYSREF± (1.25 V Nominal).

Analog

5, 6

VIN−, VIN+

Input

ADC Analog Input Complement/True.

V_1P0

Input/DNC

1.0 V Reference Voltage Input/Do Not Connect. This pin is

configurable through the SPI as a no connect or an input. Do

not connect this pin if using the internal reference. Requires a

1.0 V reference voltage input if using an external voltage

reference source.

44, 43

DNC

Do Not Connect.

53, 54

CLK+, CLK−

Input

Clock Input True/Complement.

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