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AD9250 데이터시트(PDF) 11 Page - Analog Devices

부품명 AD9250
상세설명  14-Bit, 170 MSPS/250 MSPS, JESD204B,Dual Analog-to-Digital Converter
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AD9250 데이터시트(HTML) 11 Page - Analog Devices

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Data Sheet
AD9250
Rev. 0 | Page 11 of 44
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
1
2
3
AVDD
DNC
PDWN
4
CS
5
SCLK
6
SDIO
7
DVDD
TOP VIEW
(Not to Scale)
AD9250
25
DNC
26
DVDD
27
RST
28
DVDD
29
AVDD
30
SYSREF–
31
SYSREF+
32
AVDD
33
CLK+
34
CLK–
35
RFCLK
36
AVDD
8
DNC
9
DNC
10
FDA
11
FDB
12
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.
20
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
2
RFCLK
Input
ADC RF Clock Input.
3
CLK−
Input
ADC Nyquist Clock Input—Complement.
4
CLK+
Input
ADC Nyquist Clock Input—True.
38
VIN−A
Input
Differential Analog Input Pin (−) for Channel A.
39
VIN+A
Input
Differential Analog Input Pin (+) for Channel A.
42
VCM
Output
Common-Mode Level Bias Output for Analog Inputs. Decouple
this pin to ground using a 0.1 µF capacitor.
45
VIN+B
Input
Differential Analog Input Pin (+) for Channel B.
46
VIN−B
Input
Differential Analog Input Pin (−) for Channel B.
ADC Fast Detect Outputs
26
FDB
Output
Channel B Fast Detect Indicator (CMOS Levels).
27
FDA
Output
Channel A Fast Detect Indicator (CMOS Levels).
Digital Inputs
6
SYSREF+
Input
Active Low JESD204B LVDS SYSREF Input—True
7
SYSREF−
Input
Active Low JESD204B LVDS SYSREF Input—Complement.
14
SYNCINB+
Input
Active Low JESD204B LVDS SYNC Input—True
15
SYNCINB−
Input
Active Low JESD204B LVDS SYNC Input—Complement.


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