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AD9258 Datasheet(PDF) 13 Page - Analog Devices

Part # AD9258
Description  14-Bit, 80 MSPS/105 MSPS/125 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)
PDF  44 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9258 Datasheet(HTML) 13 Page - Analog Devices

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AD9258
Rev. A | Page 13 of 44
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
PIN 1
INDICATOR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CLK+
CLK–
SYNC
NC
NC
D0B (LSB)
D1B
D2B
D3B
DRVDD
D4B
D5B
D6B
D7B
D8B
D9B
PDWN
OEB
CSB
SCLK/DFS
SDIO/DCS
ORA
D13A (MSB)
D12A
D11A
D10A
D9A
DRVDD
D8A
D7A
D6A
D5A
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
AD9258
PARALLEL CMOS
TOP VIEW
(Not to Scale)
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.
Figure 6. LFCSP Parallel CMOS Pin Configuration (Top View)
Table 8. Pin Function Descriptions (Parallel CMOS Mode)
Pin No.
Mnemonic
Type
Description
ADC Power Supplies
10, 19, 28, 37
DRVDD
Supply
Digital Output Driver Supply (1.8 V Nominal).
49, 50, 53, 54, 59,
60, 63, 64
AVDD
Supply
Analog Power Supply (1.8 V Nominal).
4, 5, 25, 26
NC
Do Not Connect.
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
51
VIN+A
Input
Differential Analog Input Pin (+) for Channel A.
52
VIN−A
Input
Differential Analog Input Pin (−) for Channel A.
62
VIN+B
Input
Differential Analog Input Pin (+) for Channel B.
61
VIN−B
Input
Differential Analog Input Pin (−) for Channel B.
55
VREF
Input/Output
Voltage Reference Input/Output.
56
SENSE
Input
Voltage Reference Mode Select. See Table 11 for details.
58
RBIAS
Input/Output
External Reference Bias Resistor.
57
VCM
Output
Common-Mode Level Bias Output for Analog Inputs.
1
CLK+
Input
ADC Clock Input—True.
2
CLK−
Input
ADC Clock Input—Complement.
Digital Input
3
SYNC
Input
Digital Synchronization Pin. Slave mode only.
Digital Outputs
27
D0A (LSB)
Output
Channel A CMOS Output Data.
29
D1A
Output
Channel A CMOS Output Data.
30
D2A
Output
Channel A CMOS Output Data.
31
D3A
Output
Channel A CMOS Output Data.



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