AD9250 datasheet(12/45 Pages) AD

12 / 45 page

AD9250

Data Sheet

Rev. E | Page 12 of 45

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

AVDD

DNC

PDWN

SCLK

SDIO

DVDD

TOP VIEW

(Not to Scale)

AD9250

DNC

DVDD

RST

DVDD

AVDD

SYSREF–

SYSREF+

AVDD

CLK+

CLK–

RFCLK

AVDD

DNC

FDA

FDB

DVDD

NOTES

1. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.

2. THE EXPOSED THERMAL PADDLE ON THE BOTTOM OF THE

PACKAGE PROVIDES THE GROUND REFERENCE FOR

DRVDD AND AVDD. THIS EXPOSED PADDLE MUST BE

CONNECTED TO GROUND FOR PROPER OPERATION.

Figure 4. Pin Configuration (Top View)

Table 8. Pin Function Descriptions

Pin No.

Mnemonic

Type

Description

ADC Power Supplies

1, 5, 8, 36, 37, 40, 41, 43, 44, 47, 48

AVDD

Supply

Analog Power Supply (1.8 V Nominal).

9, 11, 13, 16, 24, 25, 30

DVDD

Supply

Digital Power Supply (1.8 V Nominal).

12, 28, 29, 35

DNC

Do Not Connect.

17, 23

DGND

Ground Reference for DVDD.

DRVDD

Supply

JESD204B PHY Serial Output Driver Supply (1.8 V Nominal).

Note that the DRVDD power is referenced to the AGND Plane.

Exposed Paddle

AGND/DRGND

Ground

The exposed thermal paddle on the bottom of the package

provides the ground reference for DRVDD and AVDD. This

exposed paddle must be connected to ground for proper

operation.

ADC Analog

RFCLK

Input

ADC RF Clock Input.

CLK−

Input

ADC Nyquist Clock Input—Complement.

CLK+

Input

ADC Nyquist Clock Input—True.

VIN−A

Input

Differential Analog Input Pin (−) for Channel A.

VIN+A

Input

Differential Analog Input Pin (+) for Channel A.

VCM

Output

Common-Mode Level Bias Output for Analog Inputs. Decouple

this pin to ground using a 0.1 µF capacitor.

VIN+B

Input

Differential Analog Input Pin (+) for Channel B.

VIN−B

Input

Differential Analog Input Pin (−) for Channel B.

ADC Fast Detect Outputs

FDB

Output

Channel B Fast Detect Indicator (CMOS Levels).

FDA

Output

Channel A Fast Detect Indicator (CMOS Levels).

Digital Inputs

SYSREF+

Input

JESD204B LVDS SYSREF Input—True.

SYSREF−

Input

JESD204B LVDS SYSREF Input—Complement.

SYNCINB+

Input

JESD204B LVDS SYNC Input—True.

SYNCINB−

Input

JESD204B LVDS SYNC Input—Complement.

AD9250 датащи(PDF) 12 Page - Analog Devices

AD9250 датащи(HTML) 12 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

датащи скачать

ссылки URL