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AD9640 Datasheet(PDF) 17 Page - Analog Devices

Part # AD9640
Description  1.8V Dual Analog-to-Digital Converter
PDF  54 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9640 Datasheet(HTML) 17 Page - Analog Devices

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AD9640
Rev. B | Page 15 of 52
NOTES
1. NC = NO CONNECT.
2. THE EXPOSED THERMAL PAD ON THE BOTTOM OF THE PACKAGE PROVIDES THE
ANALOG GROUND FOR THE PART. THIS EXPOSED PAD MUST BE CONNECTED TO
GROUND FOR PROPER OPERATION.
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DRVDD
D6B
D7B
D8B
D9B
D10B
D11B
D12B
D13B (MSB)
DCOB
DCOA
D0A (LSB)
D1A
D2A
D3A
D4A
SCLK/DFS
SDIO/DCS
AVDD
AVDD
VIN+B
VIN–B
RBIAS
CML
SENSE
VREF
VIN–A
VIN+A
AVDD
SMI SDFS
SMI SCLK/PDWN
SMI SDO/OEB
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
PIN 1
INDICATOR
AD9640
PARALLEL CMOS
TOP VIEW
(Not to Scale)
EXPOSED PADDLE, PIN 0
(BOTTOM OF PACKAGE)
Figure 6. Pin Configuration, LFCSP Parallel CMOS (Top View)
Table 11. Pin Function Descriptions (Parallel CMOS Mode)
Pin No.
Mnemonic
Type
Description
ADC Power Supplies
20, 64
DRGND
Ground
Digital Output Ground.
1, 21
DRVDD
Supply
Digital Output Driver Supply (1.8 V to 3.3 V).
24, 57
DVDD
Supply
Digital Power Supply (1.8 V Nominal).
36, 45, 46
AVDD
Supply
Analog Power Supply (1.8 V Nominal).
0
AGND,
Exposed Pad
Ground
The exposed thermal pad on the bottom of the package provides the analog ground
for the part. This exposed pad must be connected to ground for proper operation.
ADC Analog
37
VIN+A
Input
Differential Analog Input Pin (+) for Channel A.
38
VIN−A
Input
Differential Analog Input Pin (−) for Channel A.
44
VIN+B
Input
Differential Analog Input Pin (+) for Channel B.
43
VIN−B
Input
Differential Analog Input Pin (−) for Channel B.
39
VREF
Input/Output
Voltage Reference Input/Output.
40
SENSE
Input
Voltage Reference Mode Select. See Table 14 for details.
42
RBIAS
Input/Output
External Reference Bias Resistor.
41
CML
Output
Common Mode Level Bias Output for Analog Inputs.
49
CLK+
Input
ADC Clock Input—True.
50
CLK−
Input
ADC Clock Input—Complement.



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