AD9286 Datasheet PDF - Analog Devices

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AD9286
Analog Devices

Part Number AD9286
Description 1.8 V Dual Analog-to-Digital Converter (ADC)
Page 28 Pages


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Data Sheet
FEATURES
Single 1.8 V supply operation
SNR: 49.3 dBFS at 200 MHz input at 500 MSPS
SFDR: 65 dBc at 200 MHz input at 500 MSPS
Low power: 315 mW at 500 MSPS
On-chip interleaved clocking
On-chip reference and track-and-hold
1.2 V p-p analog input range for each channel
Differential input with 500 MHz bandwidth
LVDS-compliant digital output
On-chip voltage reference and sample-and-hold circuit
DNL: ±0.2 LSB
Serial port control options
Interleaved clock timing adjustment
Offset binary, Gray code, or twos complement data format
Optional clock duty cycle stabilizer
Built-in selectable digital test pattern generation
Pin-programmable power-down function
Available in 48-lead LFCSP
APPLICATIONS
Battery-powered instruments
Handheld scope meters
Low cost digital oscilloscopes
OTS: video over fiber
8-Bit, 500 MSPS, 1.8 V
Analog-to-Digital Converter (ADC)
AD9286
GENERAL DESCRIPTION
The AD9286 is an 8-bit, monolithic sampling, analog-to-digital
converter (ADC) that supports interleaved operation and is
optimized for low cost, low power, and ease of use. Each ADC
operates at up to a 250 MSPS conversion rate with outstanding
dynamic performance.
The AD9286 takes a single sample clock and, with an on-chip
clock divider, time interleaves the two ADC cores (each running
at one-half the clock frequency) to achieve the rated 500 MSPS.
By using the SPI, the user can accurately adjust the timing of the
sampling edge per ADC to minimize the image spur energy.
The ADC requires a single 1.8 V supply and an encode clock for
full performance operation. No external reference components
are required for many applications. The digital outputs are LVDS
compatible.
The AD9286 is available in a Pb-free, 48-lead LFCSP that is
specified over the industrial temperature range of −40°C to +85°C.
PRODUCT HIGHLIGHTS
1. Integrated 8-Bit, 500 MSPS ADC.
2. Single 1.8 V Supply Operation with LVDS Outputs.
3. Power-Down Option Controlled via a Pin-Programmable
Setting.
FUNCTIONAL BLOCK DIAGRAM
SDIO/
PWDN CSB SCLK OE
CLK+
CLK–
VIN1+
VIN1–
VCM
VREF
1.0V
VREF
REF
SELECT
ADC
SPI
×1.5 CLOCK
MANAGEMENT
VIN2–
VIN2+
AUXCLK–
AUXCLK+
ADC
DCO
GENERATION
AD9286
RBIAS AUXCLKEN AGND
AVDD DRVDD DRGND
Figure 1.
D7+ (MSB), D7– (MSB)
D0+ (LSB), D0– (LSB)
DCO+
DCO–
Rev. C
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Tel: 781.329.4700 ©2011–2015 Analog Devices, Inc. All rights reserved.
Technical Support
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AD9286* Product Page Quick Links
Last Content Update: 11/01/2016
Comparable Parts
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Evaluation Kits
• AD9286 Evaluation Board
Documentation
Application Notes
• AN-1142: Techniques for High Speed ADC PCB Layout
• AN-282: Fundamentals of Sampled Data Systems
• AN-345: Grounding for Low-and-High-Frequency Circuits
• AN-501: Aperture Uncertainty and ADC System
Performance
• AN-586: LVDS Outputs for High Speed A/D Converters
• AN-715: A First Approach to IBIS Models: What They Are
and How They Are Generated
• AN-737: How ADIsimADC Models an ADC
• AN-742: Frequency Domain Response of Switched-
Capacitor ADCs
• AN-756: Sampled Systems and the Effects of Clock Phase
Noise and Jitter
• AN-827: A Resonant Approach to Interfacing Amplifiers to
Switched-Capacitor ADCs
• AN-835: Understanding High Speed ADC Testing and
Evaluation
• AN-851: A WiMax Double Downconversion IF Sampling
Receiver Design
• AN-877: Interfacing to High Speed ADCs via SPI
• AN-878: High Speed ADC SPI Control Software
• AN-905: Visual Analog Converter Evaluation Tool Version
1.0 User Manual
• AN-935: Designing an ADC Transformer-Coupled Front
End
Data Sheet
• AD9286: 8-Bit, 500 MSPS, 1.8 V Analog-to-Digital
Converter (ADC) Data Sheet
User Guides
• UG-191: Evaluating the AD9286 Analog-to-Digital
Converter
Tools and Simulations
• Visual Analog
Reference Materials
Technical Articles
• MS-2210: Designing Power Supplies for High Speed ADC
Design Resources
• ad9286 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
View all ad9286 EngineerZone Discussions
Sample and Buy
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Technical Support
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AD9286
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
DC Specifications ......................................................................... 3
AC Specifications.......................................................................... 4
Digital Specifications ................................................................... 5
Switching Specifications .............................................................. 6
SPI Timing Specifications ........................................................... 6
Absolute Maximum Ratings............................................................ 9
Thermal Resistance ...................................................................... 9
ESD Caution.................................................................................. 9
Pin Configuration and Function Descriptions........................... 10
Typical Performance Characteristics ........................................... 12
Equivalent Circuits ......................................................................... 14
Theory of Operation ...................................................................... 15
ADC Architecture ...................................................................... 15
Analog Input Considerations.................................................... 15
REVISION HISTORY
1/15—Rev. B to Rev. C
Changes to Table 13........................................................................ 24
6/13—Rev. A to Rev. B
Changes to Clock Input Parameters, Table 4 ................................ 6
Changes to Clocking Modes Section ........................................... 16
Changes to Table 9.......................................................................... 17
Changes to Register 0x09, Table 13 .............................................. 23
3/11—Rev. 0 to Rev. A
Changes to General Description, ADC Conversion Rate ........... 1
1/11—Revision 0: Initial Version
Data Sheet
Voltage Reference ....................................................................... 15
RBIAS........................................................................................... 15
Clock Input Considerations...................................................... 16
Digital Outputs ........................................................................... 18
Built-In Self-Test (BIST) and Output Test .................................. 19
Built-In Self-Test (BIST)............................................................ 19
Output Test Modes..................................................................... 19
Serial Port Interface (SPI).............................................................. 20
Configuration Using the SPI..................................................... 20
Hardware Interface..................................................................... 21
Configuration Without the SPI ................................................ 21
SPI Accessible Features.............................................................. 21
Memory Map .................................................................................. 22
Reading the Memory Map Register Table............................... 22
Memory Map Register Table..................................................... 23
Memory Map Register Descriptions........................................ 25
Applications Information .............................................................. 26
Design Guidelines ...................................................................... 26
Outline Dimensions ....................................................................... 27
Ordering Guide .......................................................................... 27
Rev. C | Page 2 of 27



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Data Sheet
AD9286
SPECIFICATIONS
DC SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, 1.0 V internal ADC reference, unless otherwise noted.
Table 1.
Parameter1
RESOLUTION
DC ACCURACY
Differential Nonlinearity
Integral Nonlinearity
No Missing Codes
Offset Error
Gain Error
MATCHING CHARACTERISTICS
Offset Error2
Gain Error
TEMPERATURE DRIFT
Offset Error
Gain Error
ANALOG INPUT
Input Span
Input Common-Mode Voltage
Input Resistance (Differential)
Input Capacitance (Differential)
Full Power Bandwidth
VOLTAGE REFERENCE
Internal Reference
Input Resistance
POWER SUPPLIES
Supply Voltage
AVDD
DRVDD
Supply Current
IAVDD
IDRVDD
POWER CONSUMPTION
Sine Wave Input3
Power-Down Power
Temperature
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Min
8
0
0
0
0
0.97
1.7
1.7
Typ
±0.2
±0.1
Guaranteed
±0.4
±2
±0.4
±0.05
±2
±20
1.2
1.4
16
250
700
1
3
1.8
1.8
125
51
315
0.3
Max
±0.4
±0.3
±2.1
±2.8
±2.1
±0.2
1.03
1.9
1.9
130
54
330
1.7
Unit
Bits
LSB
LSB
% FS
% FS
% FS
% FS
ppm/°C
ppm/°C
V p-p
V
fF
MHz
V
V
V
mA
mA
mW
mW
1 See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, for a complete set of definitions and an explanation of how these tests were
completed.
2 See the Interleave Performance section.
3 Measured with a low frequency, full-scale sine wave, with approximately 5 pF loading on each output bit.
Rev. C | Page 3 of 27



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