Quad, 8-Bit, 100 MSPS,
Serial LVDS 1.8 V ADC
AD9287
FEATURES
APPLICATIONS
FUNCTIONAL BLOCK DIAGRAM
AVDD
PDWN
DRVDD
AD9287
DRGND
8
VIN + A
VIN – A
T/H
PIPELINE
ADC
VIN + B
VIN – B
T/H
PIPELINE
ADC
VIN + C
VIN – C
T/H
PIPELINE
ADC
VIN + D
VIN – D
T/H
PIPELINE
ADC
SERIAL
LVDS
D+A
D–A
SERIAL
LVDS
D+B
D–B
SERIAL
LVDS
D+C
D–C
SERIAL
LVDS
D+D
D–D
8
8
8
VREF
SENSE
FCO+
+
–
REFT
REFB
REF
SELECT
0.5V
SERIAL PORT
INTERFACE
DATA RATE
MULTIPLIER
FCO–
DCO+
DCO–
RBIAS AGND CSB SDIO/ODM SCLK/DTP CLK+ CLK–
05966-001
4 ADCs integrated into 1 package
133 mW ADC power per channel at 100 MSPS
SNR = 49 dB (to Nyquist)
ENOB = 7.85 bits
SFDR = 65 dBc (to Nyquist)
Excellent linearity
DNL = ±0.2 LSB (typical)
INL = ±0.2 LSB (typical)
Serial LVDS (ANSI-644, default)
Low power, reduced signal option (similar to IEEE 1596.3)
Data and frame clock outputs
295 MHz full-power analog bandwidth
2 V p-p input voltage range
1.8 V supply operation
Serial port control
Full-chip and individual-channel power-down modes
Flexible bit orientation
Built-in and custom digital test pattern generation
Programmable clock and data alignment
Programmable output resolution
Standby mode
Figure 1.
capturing data on the output and a frame clock output (FCO)
for signaling a new output byte are provided. Individual-channel
power-down is supported and typically consumes less than
2 mW when all channels are disabled.
Medical imaging and nondestructive ultrasound
Portable ultrasound and digital beam-forming systems
Quadrature radio receivers
Diversity radio receivers
Tape drives
Optical networking
Test equipment
The ADC contains several features designed to maximize
flexibility and minimize system cost, such as programmable
clock and data alignment and programmable digital test pattern
generation. The available digital test patterns include built-in
deterministic and pseudorandom patterns, along with custom userdefined test patterns entered via the serial port interface (SPI).
GENERAL DESCRIPTION
The AD9287 is available in an RoHS compliant, 48-lead LFCSP. It is
specified over the industrial temperature range of −40°C to +85°C.
The AD9287 is a quad, 8-bit, 100 MSPS analog-to-digital converter (ADC) with an on-chip sample-and-hold circuit designed
for low cost, low power, small size, and ease of use. The product
operates at a conversion rate of up to 100 MSPS and is optimized
for outstanding dynamic performance and low power in
applications where a small package size is critical.
The ADC requires a single 1.8 V power supply and LVPECL-/
CMOS-/LVDS-compatible sample rate clock for full performance
operation. No external reference or driver components are
required for many applications.
The ADC automatically multiplies the sample rate clock for the
appropriate LVDS serial data rate. A data clock output (DCO) for
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
Small Footprint. Four ADCs are contained in a small, spacesaving package.
Low power of 133 mW/channel at 100 MSPS.
Ease of Use. A data clock output (DCO) is provided that
operates at frequencies of up to 400 MHz and supports
double data rate (DDR) operation.
User Flexibility. The SPI control offers a wide range of flexible
features to meet specific system requirements.
Pin-Compatible Family. This includes the AD9219 (10-bit),
AD9228 (12-bit), and AD9259 (14-bit).
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2006–2010 Analog Devices, Inc. All rights reserved.
AD9287
TABLE OF CONTENTS
Features .............................................................................................. 1
Analog Input Considerations ................................................... 19
Applications ....................................................................................... 1
Clock Input Considerations ...................................................... 21
General Description ......................................................................... 1
Serial Port Interface (SPI) .............................................................. 29
Functional Block Diagram .............................................................. 1
Hardware Interface..................................................................... 29
Product Highlights ........................................................................... 1
Memory Map .................................................................................. 31
Revision History ............................................................................... 3
Reading the Memory Map Table .............................................. 31
Specifications..................................................................................... 4
Reserved Locations .................................................................... 31
AC Specifications.......................................................................... 5
Default Values ............................................................................. 31
Digital Specifications ................................................................... 6
Logic Levels ................................................................................. 31
Switching Specifications .............................................................. 7
Evaluation Board ............................................................................ 35
Timing Diagrams .............................................................................. 8
Power Supplies ............................................................................ 35
Absolute Maximum Ratings.......................................................... 10
Input Signals................................................................................ 35
Thermal Impedance ................................................................... 10
Output Signals ............................................................................ 35
ESD Caution ................................................................................ 10
Default Operation and Jumper Selection Settings ................. 36
Pin Configuration and Function Descriptions ........................... 11
Alternative Analog Input Drive Configuration...................... 37
Equivalent Circuits ......................................................................... 13
Outline Dimensions ....................................................................... 51
Typical Performance Characteristics ........................................... 15
Ordering Guide .......................................................................... 51
Theory of Operation ...................................................................... 19
Rev. D | Page 2 of 52
AD9287
REVISION HISTORY
4/10—Rev. C to Rev. D
Changes to Table 16 ........................................................................33
Updated Outline Dimensions ........................................................51
Changes to Ordering Guide ...........................................................51
1/10—Rev. B to Rev. C
Updated Outline Dimensions ........................................................51
Changes to Ordering Guide ...........................................................52
7/07—Rev. A to Rev. B
Changes to Figure 2 and Figure 4.................................................... 7
Changes to Table 17 ........................................................................48
5/07—Rev. 0 to Rev. A
Changes to Logic Output (SDIO/ODM)........................................ 5
Change to Pipeline Latency ............................................................. 6
Added Endnote 2 to Table 4............................................................. 6
Changes to Figure 2 to Figure 4....................................................... 7
Changes to Figure 10 ......................................................................12
Change to Figure 15 Caption .........................................................14
Changes to Figure 29 ......................................................................16
Changes to Figure 41 ......................................................................19
Changes to Clock Duty Cycle Considerations Section ..............20
Changes to Power Dissipation and Power-Down Mode Section ...21
Changes to Figure 50 to Figure 52 Captions ............................... 23
Change to Table 8 ............................................................................ 23
Changes to Table 9 Endnote .......................................................... 24
Changes to Digital Outputs and Timing Section ........................ 25
Added Table 10 ................................................................................ 25
Changes to RBIAS Pin Section ...................................................... 26
Deleted Figure 53 and Figure 54 ................................................... 26
Changes to Figure 56 ...................................................................... 27
Changes to Hardware Interface Section ....................................... 28
Added Figure 57 .............................................................................. 29
Changes to Table 15 ........................................................................ 29
Changes to Reading the Memory Map Table Section ................ 30
Changes to Output Signals Section............................................... 34
Changes to Figure 60 ...................................................................... 34
Changes to Default Operation and
Jumper Selection Settings Section ................................................ 35
Changes to Alternative Analog Input Drive
Configuration Section .................................................................... 36
Changes to Figure 63 ...................................................................... 38
Changes to Table 17 ........................................................................ 46
Changes to Ordering Guide ........................................................... 50
7/06—Revision 0: Initial Version
Rev. D | Page 3 of 52
AD9287
SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, 2 V p-p differential input, 1.0 V internal reference, AIN = −0.5 dBFS, unless otherwise noted.
Table 1.
Parameter 1
RESOLUTION
ACCURACY
No Missing Codes
Offset Error
Offset Matching
Gain Error
Gain Matching
Differential Nonlinearity (DNL)
Integral Nonlinearity (INL)
TEMPERATURE DRIFT
Offset Error
Gain Error
Reference Voltage (1 V Mode)
REFERENCE
Output Voltage Error (VREF = 1 V)
Load Regulation at 1.0 mA (VREF = 1 V)
Input Resistance
ANALOG INPUTS
Differential Input Voltage (VREF = 1 V)
Common-Mode Voltage
Differential Input Capacitance
Analog Bandwidth, Full Power
POWER SUPPLY
AVDD
DRVDD
IAVDD
IDRVDD
Total Power Dissipation (Including Output Drivers)
Power-Down Dissipation
Standby Dissipation 2
CROSSTALK
CROSSTALK (Overrange Condition) 3
Temp
Min
8
Full
Full
Full
Full
Full
Full
Full
Typ
Guaranteed
±5
±5
±6
±0.5
±0.2
±0.2
Full
Full
Full
±2
±17
±21
Full
Full
Full
±5
3
6
Full
Full
Full
Full
2
AVDD/2
7
295
Full
Full
Full
Full
Full
Full
Full
Full
Full
1
1.7
1.7
1.8
1.8
260
34.5
530
2
72
−100
−100
Max
Unit
Bits
±23.4
±23.4
mV
mV
% FS
% FS
LSB
LSB
±2
±0.8
±0.65
ppm/°C
ppm/°C
ppm/°C
±30
mV
mV
kΩ
V p-p
V
pF
MHz
1.9
1.9
274
38
562
4
V
V
mA
mA
mW
mW
mW
dB
dB
See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, at www.analog.com for definitions and for details on how these tests were
completed.
2
Can be controlled via the SPI.
3
Overrange condition is specific with 6 dB of the full-scale input range.
Rev. D | Page 4 of 52
AD9287
AC SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, 2 V p-p differential input, 1.0 V internal reference, AIN = −0.5 dBFS, unless otherwise noted.
Table 2.
Parameter 1
SIGNAL-TO-NOISE RATIO (SNR)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
SIGNAL-TO-NOISE AND DISTORTION RATIO (SINAD)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
EFFECTIVE NUMBER OF BITS (ENOB)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
WORST HARMONIC (Second or Third)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
WORST OTHER (Excluding Second or Third)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
TWO-TONE INTERMODULATION DISTORTION (IMD)—
AIN1 AND AIN2 = −7.0 dBFS
fIN1 = 15 MHz, fIN2 = 16 MHz
fIN1 = 70 MHz, fIN2 = 71 MHz
1
Temp
Min
Typ
Max
Unit
Full
Full
Full
46.5
49.2
49.0
49.0
dB
dB
dB
Full
Full
Full
46.0
49.0
48.5
48.5
dB
dB
dB
Full
Full
Full
7.43
7.88
7.85
7.85
Bits
Bits
Bits
Full
Full
Full
54.0
70.0
65.0
62.0
dBc
dBc
dBc
Full
Full
Full
−70.0
−65.0
−62.0
−54.0
dBc
dBc
dBc
Full
Full
Full
−77.0
−74.0
−71.0
−58.5
dBc
dBc
dBc
25°C
25°C
70.0
68.5
dBc
dBc
See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, at www.analog.com for definitions and for details on how these tests were
completed.
Rev. D | Page 5 of 52
AD9287
DIGITAL SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, 2 V p-p differential input, 1.0 V internal reference, AIN = −0.5 dBFS, unless otherwise noted.
Table 3.
Parameter 1
CLOCK INPUTS (CLK+, CLK−)
Logic Compliance
Differential Input Voltage 2
Input Common-Mode Voltage
Input Resistance (Differential)
Input Capacitance
LOGIC INPUTS (PDWN, SCLK/DTP)
Logic 1 Voltage
Logic 0 Voltage
Input Resistance
Input Capacitance
LOGIC INPUT (CSB)
Logic 1 Voltage
Logic 0 Voltage
Input Resistance
Input Capacitance
LOGIC INPUT (SDIO/ODM)
Logic 1 Voltage
Logic 0 Voltage
Input Resistance
Input Capacitance
LOGIC OUTPUT (SDIO/ODM) 3
Logic 1 Voltage (IOH = 800 μA)
Logic 0 Voltage (IOL = 50 μA)
DIGITAL OUTPUTS (D + x, D − x), (ANSI-644)
Logic Compliance
Differential Output Voltage (VOD)
Output Offset Voltage (VOS)
Output Coding (Default)
DIGITAL OUTPUTS (D + x, D − x),
(Low Power, Reduced Signal Option)
Logic Compliance
Differential Output Voltage (VOD)
Output Offset Voltage (VOS)
Output Coding (Default)
Temp
Min
Full
Full
25°C
25°C
250
Full
Full
25°C
25°C
1.2
Full
Full
25°C
25°C
1.2
Full
Full
25°C
25°C
1.2
0
Typ
Max
Unit
CMOS/LVDS/LVPECL
mV p-p
V
kΩ
pF
1.2
20
1.5
3.6
0.3
V
V
kΩ
pF
3.6
0.3
V
V
kΩ
pF
DRVDD + 0.3
0.3
V
V
kΩ
pF
30
0.5
70
0.5
30
2
Full
Full
1.79
0.05
V
V
454
1.375
mV
V
250
1.30
mV
V
LVDS
Full
Full
247
1.125
Offset binary
LVDS
Full
Full
150
1.10
Offset binary
1
See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, at www.analog.com for definitions and for details on how these tests were
completed.
2
This is specified for LVDS and LVPECL only.
3
This is specified for 13 SDIO pins sharing the same connection.
Rev. D | Page 6 of 52
AD9287
SWITCHING SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, 2 V p-p differential input, 1.0 V internal reference, AIN = −0.5 dBFS, unless otherwise noted.
Table 4.
Parameter 1 , 2
CLOCK 3
Maximum Clock Rate
Minimum Clock Rate
Clock Pulse Width High (tEH)
Clock Pulse Width Low (tEL)
OUTPUT PARAMETERS3
Propagation Delay (tPD)
Rise Time (tR) (20% to 80%)
Fall Time (tF) (20% to 80%)
FCO Propagation Delay (tFCO)
DCO Propagation Delay (tCPD) 4
DCO to Data Delay (tDATA)4
DCO to FCO Delay (tFRAME)4
Data to Data Skew
(tDATA-MAX − tDATA-MIN)
Wake-Up Time (Standby)
Wake-Up Time (Power-Down)
Pipeline Latency
APERTURE
Aperture Delay (tA)
Aperture Uncertainty (Jitter)
Out-of-Range Recovery Time
Temp
Min
Full
Full
Full
Full
100
Full
Full
Full
Full
Full
2.0
Full
Full
Full
Typ
Max
10
5
5
2.0
(tSAMPLE/16) − 300
(tSAMPLE/16) − 300
2.7
300
300
2.7
tFCO +
(tSAMPLE/16)
(tSAMPLE/16)
(tSAMPLE/16)
±50
3.5
3.5
(tSAMPLE/16) + 300
(tSAMPLE/16) + 300
±150
Unit
MSPS
MSPS
ns
ns
ns
ps
ps
ns
ns
ps
ps
ps
25°C
25°C
Full
600
375
8
ns
μs
CLK cycles
25°C
25°C
25°C
500
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