10-Bit,
210 MSPS ADC
AD9410
SNR = 54 dB with 99 MHz analog input
500 MHz analog bandwidth
On-chip reference and track and hold
1.5 V p-p differential analog input range
5.0 V and 3.3 V supply operation
3.3 V CMOS/TTL outputs
Power: 2.1 W typical at 210 MSPS
Demultiplexed outputs each at 105 MSPS
Output data format option
Data sync input and data clock output provided
Interleaved or parallel data output option
FUNCTIONAL BLOCK DIAGRAM
REFIN REFOUT
AGND DGND VD VDD VCC
AD9410
REFERENCE
PORT
A
AIN
AIN
DS
DS
CLK+
CLK–
ADC
10-BIT
CORE
T/H
10
ORA
DA9–DA0
10
PORT
B
10
ORB
DB9–DB0
TIMING AND
SYNCHRONIZATION
DCO
DCO
APPLICATIONS
DFS
I/P
01679-001
FEATURES
Figure 1.
Communications and radars
Local multipoint distribution services (LMDS)
High-end imaging systems and projectors
Cable reverse paths
Point-to-point radio links
GENERAL DESCRIPTION
The AD9410 is a 10-bit monolithic sampling analog-to-digital
converter (ADC) with an on-chip track-and-hold circuit and is
optimized for high speed conversion and ease of use. The product
operates at a 210 MSPS conversion rate, with outstanding
dynamic performance over its full operating range.
The ADC requires a 5.0 V and 3.3 V power supply and up to a
210 MHz differential clock input for full performance operation.
No external reference or driver components are required for many
applications. The digital outputs are TTL-/CMOS-compatible and
separate output power supply pins also support interfacing with
3.3 V logic.
The clock input is differential and TTL-/CMOS-compatible.
The 10-bit digital outputs can be operated from 3.3 V (2.5 V to
3.6 V) supplies. Two output buses support demultiplexed data
up to 105 MSPS rates and binary or twos complement output
coding format is available. A data sync function is provided for
timing-dependent applications. An output clock simplifies
interfacing to external logic. The output data bus timing is
selectable for parallel or interleaved mode, allowing for
flexibility in latching output data.
Fabricated on an advanced BiCMOS process, the AD9410 is
available in an 80-lead thin quad flat package, exposed pad
specified over the industrial temperature range (−40°C to +85°C).
PRODUCT HIGHLIGHTS
1.
High Resolution at High Speed—The architecture is specifically designed to support conversion up to 210 MSPS
with outstanding dynamic performance.
2.
Demultiplexed Output—Output data is decimated by two
and provided on two data ports for ease of data transport.
3.
Output Data Clock—The AD9410 provides an output data
clock synchronous with the output data, simplifying the
timing between data and other logic.
4.
Data Synchronization—A DS input is provided to allow for
synchronization of two or more AD9410s in a system, or to
synchronize data to a specific output port in a single
AD9410 system.
Rev. A
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 ©2000–2007 Analog Devices, Inc. All rights reserved.
AD9410
TABLE OF CONTENTS
Features .............................................................................................. 1
Pin Configuration and Function Descriptions..............................8
Applications....................................................................................... 1
Terminology .................................................................................... 10
Functional Block Diagram .............................................................. 1
Equivalent Circuits..................................................................... 12
General Description ......................................................................... 1
Typical Performance Characteristics ........................................... 13
Product Highlights ........................................................................... 1
Theory of Operation ...................................................................... 16
Revision History ............................................................................... 2
Using the AD9410 ...................................................................... 16
Specifications..................................................................................... 3
Analog Input ............................................................................... 16
DC Specifications ......................................................................... 3
Digital Outputs ........................................................................... 16
Switching Specifications .............................................................. 4
Clock Outputs (DCO, DCO).................................................... 16
Digital Specifications ................................................................... 4
Voltage Reference ....................................................................... 17
AC Specifications.......................................................................... 5
Timing ......................................................................................... 17
Absolute Maximum Ratings............................................................ 7
Data Sync (DS) ........................................................................... 17
Explaination of Test Levels.......................................................... 7
Outline Dimensions ....................................................................... 19
ESD Caution.................................................................................. 7
Ordering Guide .......................................................................... 19
REVISION HISTORY
7/07—Rev. 0 to Rev. A
Updated Format..................................................................Universal
Deleted 80-Lead LQFP_EP ...............................................Universal
Added 80-Lead TQFP_EP.................................................Universal
Changes to Figure 1 and General Description ............................. 1
Changes to Table 2 and Table 3....................................................... 4
Changes to Figure 2.......................................................................... 6
Changes to Note 1............................................................................. 7
Changes to Figure 3 and Table 6..................................................... 8
Changes to Terminology Section.................................................. 10
Changes to Figure 6........................................................................ 12
Deleted Evaluation Board Section................................................ 14
Renamed Encode Input Section, Clock Input Section and
Changes to Clock Input Section, Clock Outputs (DCO, DCO)
Section, Figure 26, and Figure 27 ................................................. 16
Changes to Data Sync (DS) Section ............................................. 17
Changes to Figure 29...................................................................... 18
Updated Outline Dimensions ....................................................... 19
Changes to Ordering Guide .......................................................... 19
10/00—Revision 0: Initial Version
Rev. A | Page 2 of 20
AD9410
SPECIFICATIONS
DC SPECIFICATIONS
VDD = 3.3 V, VD = 3.3 V, VCC = 5.0 V; 2.5 V external reference; AIN = −0.5 dBFS; clock input = 210 MSPS; TA = 25°C; unless otherwise noted.
Table 1.
Parameter
RESOLUTION
DC ACCURACY
No Missing Codes
Differential Nonlinearity
Integral Nonlinearity
Gain Error
Gain Temperature Coefficient
ANALOG INPUT
Input Voltage Range (With Respect to AIN)
Common-Mode Voltage
Input Offset Voltage
Reference Voltage
Reference Temperature Coefficient
Input Resistance
Input Capacitance
Analog Bandwidth, Full Power
POWER SUPPLY
Power Dissipation AC 1
Power Dissipation DC 2
IVCC2
IVD2
Power Supply Rejection Ratio, PSRR
1
2
Temp
Test Level
Min
Full
25°C
Full
25°C
Full
25°C
Full
IV
I
VI
I
VI
I
V
−1.0
−1.0
−2.5
−3.0
−6.0
Full
Full
25°C
Full
Full
Full
Full
25°C
25°C
V
V
I
VI
VI
V
VI
V
V
25°C
Full
Full
Full
25°C
V
VI
VI
VI
I
Clock input = 210 MSPS, AIN = –0.5 dBFS, 10 MHz sine wave, IVDD = 31 mA typical at CLOAD = 5 pF.
Clock input = 210 MSPS, AIN = dc, outputs not switching.
Rev. A | Page 3 of 20
−15
−20
2.4
610
−7.5
Typ
10
Guaranteed
±0.5
±1.65
0
130
±768
3.0
+3
2.5
50
875
3
500
2.1
2.0
128
401
+0.5
Max
Unit
Bits
+1.25
+1.5
+2.5
+3.0
+6.0
LSB
LSB
LSB
LSB
% FS
ppm/°C
+15
+20
2.6
1250
2.4
145
480
+7.5
mV p-p
V
mV
mV
V
ppm/°C
Ω
pF
MHz
W
W
mA
mA
mV/V
AD9410
SWITCHING SPECIFICATIONS
VDD = 3.3 V, VD = 3.3 V, VCC = 5.0 V; 2.5 V external reference; AIN = −0.5 dBFS; clock input = 210 MSPS; TA = 25°C; unless otherwise noted.
Table 2.
Parameter
SWITCHING PERFORMANCE
Maximum Conversion Rate
Minimum Conversion Rate
Clock Pulse Width High, tEH
Clock Pulse Width Low, tEL
Aperture Delay, tA
Aperture Uncertainty (Jitter)
Output Valid Time, tV
Output Propagation Delay, tPD
Output Rise Time, tR
Output Fall Time, tF
CLKOUT Propagation Delay, tCPD 1
Data to DCO Skew, (tPD – tCPD)
DS Setup Time, tSDS
DS Hold Time, tHDS
Interleaved Mode (A, B Latency)
Parallel Mode (A, B Latency)
1
Temp
Test Level
Min
Full
Full
25°C
25°C
25°C
25°C
Full
Full
25°C
25°C
Full
Full
Full
Full
Full
Full
VI
IV
IV
IV
V
V
VI
VI
V
V
VI
IV
IV
IV
VI
VI
210
Typ
Max
100
1.2
1.2
2.4
2.4
1.0
0.65
3.0
7.4
1.8
1.4
4.8
1
2.6
0
0.5
0
6.4
2
A = 6, B = 6
A = 7, B = 6
Unit
MSPS
MSPS
ns
ns
ns
ps rms
ns
ns
ns
ns
ns
ns
ns
ns
Cycles
Cycles
CLOAD = 5 pF.
DIGITAL SPECIFICATIONS
VDD = 3.3 V, VD = 3.3 V, VCC = 5.0 V; 2.5 V external reference; AIN = −0.5 dBFS; clock input = 210 MSPS; TA = 25°C; unless otherwise noted.
Table 3.
Parameter
DIGITAL INPUTS
DFS, Input Logic 1 Voltage
DFS, Input Logic 0 Voltage
DFS, Input Logic 1 Current
DFS, Input Logic 0 Current
I/P Input Logic 1 Current 1
I/P Input Logic 0 Current1
CLK+, CLK− Differential Input Voltage
CLK+, CLK− Differential Input Resistance
CLK+, CLK− Common-Mode Input Voltage 2
DS, DS Differential Input Voltage
DS, DS Common-Mode Input Voltage
Digital Input Pin Capacitance
DIGITAL OUTPUTS
Logic 1 Voltage (VDD = 3.3 V)
Logic 0 Voltage (VDD = 3.3 V)
Output Coding
1
2
Temp
Test Level
Min
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
25°C
IV
IV
V
V
V
V
IV
V
V
IV
V
V
4
Full
Full
VI
VI
Typ
Max
1
50
50
400
1
0.4
1.6
1.5
0.4
1.5
3
VDD – 0.05
0.05
Binary or Twos Complement
I/P pin Logic 1 = 5 V, Logic 0 = GND. It is recommended to use a series 2.5 kΩ (±10%) resistor to VDD when setting to Logic 1 to limit input current.
See Clock Input section.
Rev. A | Page 4 of 20
Unit
V
V
μA
μA
μA
μA
V
kΩ
V
V
V
pF
V
V
AD9410
AC SPECIFICATIONS
VDD = 3.3 V, VD = 3.3 V, VCC = 5.0 V; 2.5 V external reference; AIN = −0.5 dBFS; clock input = 210 MSPS; TA = 25°C; unless otherwise noted.
Table 4.
Parameter
DYNAMIC PERFORMANCE
Transient Response
Overvoltage Recovery Time
Signal-to-Noise Ratio, SNR (Without Harmonics)
fIN = 10.3 MHz
fIN = 82 MHz
fIN = 160 MHz
Signal-to-Noise Ratio, SINAD (With Harmonics)
fIN = 10.3 MHz
fIN = 82 MHz
fIN = 160 MHz
Effective Number of Bits, ENOB
fIN = 10.3 MHz
fIN = 82 MHz
fIN = 160 MHz
Second Harmonic Distortion
fIN = 10.3 MHz
fIN = 82 MHz
fIN = 160 MHz
Third Harmonic Distortion
fIN = 10.3 MHz
fIN = 82 MHz
fIN = 160 MHz
Spurious-Free Dynamic Range, SFDR
fIN = 10.3 MHz
fIN = 82 MHz
fIN = 160 MHz
Two-Tone Intermod Distortion, IMD 1
fIN1 = 80.3 MHz, fIN2 = 81.3 MHz
1
Temp
Test Level
25°C
25°C
V
V
25°C
25°C
25°C
I
I
V
25°C
25°C
25°C
Min
Typ
Max
Unit
2
2
ns
ns
52.5
52
55
54
53
dB
dB
dB
I
I
V
51
50
54
53
52
dB
dB
dB
25°C
25°C
25°C
I
I
V
8.3
8.1
8.8
8.6
8.4
Bits
Bits
Bits
25°C
25°C
25°C
I
I
V
−56
−55
−65
−63
−65
dBc
dBc
dBc
25°C
25°C
25°C
I
I
V
−58
−57
−69
−67
−62
dBc
dBc
dBc
25°C
25°C
25°C
I
I
V
56
54
61
60
58
dBc
dBc
dBc
25°C
V
58
dBFS
IN1, IN2 level = −7 dBFS.
Rev. A | Page 5 of 20
AD9410
SAMPLE N+3
SAMPLE N–1 SAMPLE N
SAMPLE N+4
SAMPLE N+5
AIN
SAMPLE N–2
tEH
CLK+
CLK–
DS
tHDS
tA
tEL
SAMPLE N+1 SAMPLE N+2
SAMPLE N+6
1/fS
tSDS
DS
tPD
INTERLEAVED DATA OUT
PORT A
D7 TO D0
STATIC
PORT B
D7 TO D0
STATIC
INVALID
INVALID
INVALID
INVALID
DATA N+1
tV
DATA N+3
INVALID
INVALID
DATA N
DATA N+2
PARALLEL DATA OUT
PORT A
D7 TO D0
STATIC
INVALID
INVALID
INVALID
INVALID
DATA N+1
PORT B
D7 TO D0
STATIC
INVALID
INVALID
INVALID
DATA N
DATA N+2
tCPD
01679-002
DCO
STATIC
DCO
Figure 2. Timing Diagram
Rev. A | Page 6 of 20
AD9410
ABSOLUTE MAXIMUM RATINGS
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Table 5.
Parameter
VD, VCC, VDD
Analog Inputs
Digital Inputs
VREFIN
Digital Output Current
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature 1
1
Rating
6V
0 V to VCC + 0.5 V
0 V to VDD + 0.5 V
0 V to VD + 0.5 V
20 mA
−55°C to +125°C
−65°C to +150°C
150°C
EXPLAINATION OF TEST LEVELS
Test Level
Adequate dissipation of power from the AD9410 relies on all power and
ground pins of the device being soldered directly to a copper plane on a PCB.
In addition, the thermally enhanced package of the AD9410BSVZ has an
exposed paddle on the bottom that must be soldered to a large copper
plane, which, for convenience, can be the ground plane. Sockets for package
style of the AD9410 device are not recommended.
I.
100% production tested.
II.
100% production tested at 25°C and sample tested at
specified temperatures.
III.
Sample tested only.
IV.
Parameter is guaranteed by design and characterization
testing.
V.
Parameter is a typical value only.
VI.
100% production tested at 25°C; guaranteed by
design and characterization testing for industrial
temperature range.
ESD CAUTION
Rev. A | Page 7 of 20
AD9410
DA5
DA6
DA8
DA7
DA9 (MSB)
ORA
VDD
DGND
VD
VD
AGND
AGND
AGND
AGND
VD
VD
AGND
AGND
DFS
I/P
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
AGND 1
60 VDD
PIN 1
IDENTIFIER
AGND 2
59 DGND
VCC 3
58 DA4
REFOUT 4
57 DA3
REFIN 5
56 DA2
DNC 6
55 DA1
VCC 7
54 DA0 (LSB)
53 VDD
AGND 8
AD9410
AGND 9
52 DGND
TOP VIEW
80-LEAD THIN QUAD FLAT PACKAGE
(Not to Scale)
AIN 10
AIN 11
51 DCO
50 DCO
49 DGND
AGND 12
48 VDD
AGND 13
VCC 14
47 ORB
VCC 15
46 DB9 (MSB)
AGND 16
45 DB8
AGND 17
44 DB7
CLK+ 18
43 DB6
CLK– 19
42 DB5
AGND 20
41 VDD
DB4
DGND
DB3
DB2
DB1
01679-003
DNC = DO NOT CONNECT.
(LSB) DB0
VDD
DGND
VD
VD
AGND
AGND
AGND
AGND
VD
VD
AGND
DS
DS
AGND
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Figure 3. Pin Configuration
Table 6. Pin Function Descriptions
Pin No.
1, 2, 8, 9, 12, 13, 16,
17, 20, 21, 24, 27, 28,
29, 30, 71, 72, 73, 74,
77, 78
3, 7, 14, 15
Mnemonic
AGND
Function
Analog Ground.
VCC
5 V Supply. (Regulate to within ±5%.)
4
5
6
10
REFOUT
REFIN
DNC
AIN
Internal Reference Output.
Internal Reference Input.
Do Not Connect.
Analog Input—True.
11
18
19
22
23
25, 26, 31, 32, 69, 70,
75, 76
33, 40, 49, 52, 59, 68
34, 41, 48, 53, 60, 67
35 to 39
42 to 46
47
50
AIN
CLK+
CLK−
DS
DS
VD
Analog Input—Complement.
Clock Input—True.
Clock Input—Complement.
Data Sync (Input)—True. Tie low if not used.
Data Sync (Input)—Complement. Float and decouple with 0.1 μF capacitor if not used.
3.3 V Analog Supply. (Regulate to within ±5%.)
DGND
VDD
DB0 to DB4
DB5 to DB9
ORB
DCO
Digital Ground.
3.3 V Digital Output Supply. (2.5 V to 3.6 V)
Digital Data Output for Channel B. (LSB = DB0.)
Digital Data Output for Channel B. (MSB = DB9.)
Data Overrange for Channel B.
Clock Output—Complement.
Rev. A | Page 8 of 20
AD9410
Pin No.
51
54 to 58
61 to 65
66
79
80
Mnemonic
DCO
DA0 to DA4
DA5 to DA9
ORA
DFS
I/P
Function
Clock Output—True.
Digital Data Output for Channel A (LSB = DA0).
Digital Data Output for Channel A (MSB = DA9).
Data Overrange for Channel A.
Data Format Select. High = twos complement, and low = binary.
Interleaved or Parallel Output Mode. Low = parallel mode, and high = interleaved mode.
If tying high, use a current limiting series resistor (2.5 kΩ) to the 5 V supply.
Rev. A | Page 9 of 20
AD9410
TERMINOLOGY
Analog Bandwidth
The analog input frequency at which the spectral power of the
fundamental frequency (as determined by the FFT analysis) is
reduced by 3 dB.
Aperture Delay
The delay between the 50% point of the rising edge of the clock
command and the instant at which the analog input is sampled.
Aperture Uncertainty (Jitter)
The sample-to-sample variation in aperture delay.
Differential Analog Input Resistance, Differential Analog
Input Capacitance, and Differential Analog Input Impedance
The real and complex impedances measured at each analog
input port. The resistance is measured statically and the
capacitance and differential input impedances are measured
with a network analyzer.
Differential Analog Input Voltage Range
The peak-to-peak differential voltage that must be applied to
the converter to generate a full-scale response. Peak differential
voltage is computed by observing the voltage on a single pin
and subtracting the voltage from the other pin, which is 180°
out of phase. Peak-to-peak differential is computed by rotating
the inputs phase 180° and taking the peak measurement again.
The difference is then computed between both peak
measurements.
Differential Nonlinearity
The deviation of any code width from an ideal 1 LSB step.
Effective Number of Bits (ENOB)
ENOB is calculated from the measured SINAD based on the
equation
ENOB =
⎛ Full Scale Amplitude ⎞
⎟
SINAD MEASURED − 1.76 dB + 20 log ⎜
⎜ Input Amplitude ⎟
⎝
⎠
6.02
Clock Pulse Width/Duty Cycle
Pulse width high is the minimum amount of time that the clock
pulse should be left in Logic 1 state to achieve rated performance;
pulse width low is the minimum time the clock pulse should be
left in low state. At a given clock rate, these specifications define
an acceptable clock duty cycle.
Full-Scale Input Power
Expressed in dBm. Computed using the equation
POWER FULLSCALE
⎡
⎢ V 2 FULLSCALE
rms
= 10 log ⎢
⎢ Z INPUT
⎢
0.001
⎣
⎤
⎥
⎥
⎥
⎥
⎦
Harmonic Distortion, Second
The ratio of the rms signal amplitude to the rms value of the
second harmonic component, reported in dBc.
Harmonic Distortion, Third
The ratio of the rms signal amplitude to the rms value of the
third harmonic component, reported in dBc.
Integral Nonlinearity
The deviation of the transfer function from a reference line
measured in fractions of 1 LSB using a best straight line
determined by a least-square curve fit.
Minimum Conversion Rate
The clock rate at which the SNR of the lowest analog
signal frequency drops by no more than 3 dB below the
guaranteed limit.
Maximum Conversion Rate
The clock rate at which parametric testing is performed.
Output Propagation Delay
The delay between a differential crossing of CLK+ and
CLK− and the time when all output data bits are within valid
logic levels.
Out-of-Range Recovery Time
Out-of-range recovery time is the time it takes for the ADC to
reacquire the analog input after a transient from 10% above
positive full scale to 10% above negative full scale, or from 10%
below negative full scale to 10% below positive full scale.
Noise (For Any Range Within the ADC)
− SIGNALdBFS ⎞
⎛ FS
VNOISE = | Z | × 0.001 × 10⎜ dBm
⎟
10
⎝
⎠
where:
Z is the input impedance.
FS is the full scale of the device for the frequency in question.
SIGNAL is the signal level within the ADC reported in dB
below full scale. This value includes both thermal and
quantization noise.
Power Supply Rejection Ratio (PSRR)
The ratio of a change in input offset voltage to a change in
power supply voltage.
Rev. A | Page 10 of 20
AD9410
Signal-to-Noise-and-Distortion (SINAD)
The ratio of the rms signal amplitude (set 0.5 dB below full
scale) to the rms value of the sum of all other spectral
components, including harmonics, but excluding dc.
Two-Tone Intermodulation Distortion Rejection
The ratio of the rms value of either input tone to the rms
value of the worst third-order intermodulation product;
reported in dBc.
Signal-to-Noise Ratio (Without Harmonics)
The ratio of the rms signal amplitude (set at 0.5 dB below full
scale) to the rms value of the sum of all other spectral
components, excluding the first five harmonics and dc.
Two-Tone SFDR
The ratio of the rms value of either input tone to the rms value
of the peak spurious component. The peak spurious component
may or may not be an IMD product. May be reported in dBc
(that is, degrades as signal level is lowered) or in dBFS (always
related back to converter full scale).
Spurious-Free Dynamic Range (SFDR)
The ratio of the rms signal amplitude to the rms value of the
peak spurious spectral component. The peak spurious
component may or may not be a harmonic. It may be reported
in dBc (that is, degrades as signal level is lowered) or dBFS
(always related back to converter full scale).
Worst Other Spur
The ratio of the rms signal amplitude to the rms value of the
worst spurious component (excluding the second and third
harmonic) reported in dBc.
Transient Response Time
Transient response time is defined as the time it takes for the
ADC to reacquire the analog input after a transient from 10%
above negative full scale to 10% below positive full scale.
Table 7. Output Coding (VREF = 2.5 V)
Step
AIN − AIN
Digital Outputs Offset Binary
Digital Outputs Twos Complement
ORA, ORB
1023
·
·
513
512
511
·
·
0
>+0.768
+0.768
·
·
+0.0015
0.0
–0.0015
·
·
–0.768
< –0.768
11 1111 1111
11 1111 1111
·
·
10 0000 0001
10 0000 0000
01 1111 1111
·
·
00 0000 0000
00 0000 0000
01 1111 1111
01 1111 1111
·
·
00 0000 0001
00 0000 0000
11 1111 1111
·
·
10 0000 0000
10 0000 0000
1
0
·
·
0
0
0
·
·
0
1
Rev. A | Page 11 of 20
AD9410
EQUIVALENT CIRCUITS
VCC
1.5kΩ
1.5kΩ
AIN
VCC
AIN
2.25kΩ
01679-008
VREFOUT
01679-004
2.25kΩ
Figure 4. Equivalent Analog Input Circuit
Figure 8. Equivalent Reference Output Circuit
VCC
VCC
VREFIN
DFS
01679-005
01679-009
100kΩ
Figure 5. Equivalent Reference Input Circuit
Figure 9. Equivalent DFS Input Circuit
VCC
VCC
450Ω
17.5kΩ
17kΩ
CLK+
100Ω
300Ω
DS
CLK–
300Ω
DS
100Ω
7.5kΩ
8kΩ
01679-006
8kΩ
01679-010
17kΩ
450Ω
Figure 6. Equivalent Clock Input Circuit
Figure 10. Equivalent DS Input Circuit
VCC
17.5kΩ
VDD
I/P
300Ω
7.5kΩ
01679-007
01679-011
DIGITAL
OUTPUT
Figure 7. Equivalent Digital Output Circuit
Figure 11. Equivalent I/P Input Circuit
Rev. A | Page 12 of 20
AD9410
TYPICAL PERFORMANCE CHARACTERISTICS
0
55
ENCODE = 210MSPS
AIN = 40MHz @ –0.5dBFS
SNR = 54.5dB
SINAD = 53.5dB
–20
54
53
SNR/SINAD (dB)
AMPLITUDE (dB)
SNR
52
–40
–60
–80
51
50
49
48
SINAD
47
–100
FREQUENCY (MHz)
45
0
50
250
55.0
54.5
SNR
54.0
53.5
–40
SNR/SINAD (dB)
AMPLITUDE (dB)
200
Figure 15. SNR/SINAD vs. AIN; 210 MSPS
ENCODE = 210MSPS
AIN = 100MHz @ –0.5dBFS
SNR = 53.5dB
SINAD = 52.5dB
–20
150
AIN (MHz)
Figure 12. Single Tone at 40 MHz; 210 MSPS
0
100
01679-015
105
0
01679-012
46
–120
–60
–80
53.0
52.5
SINAD
52.0
51.5
51.0
–100
0
105
FREQUENCY (MHz)
50.0
100
01679-013
–120
Figure 13. Single Tone at 100 MHz; 210 MSPS
140
160
180
200
SAMPLE RATE (MSPS)
220
240
Figure 16. SNR/SINAD vs. Sample Rate; AIN = 70 MHz
0
60
ENCODE = 210MSPS
AIN = 160MHz @ –0.5dBFS
SNR = 53dB
SINAD = 52dB
–20
55
–40
SNR/SINAD (dB)
–60
–80
–100
SNR
SINAD
50
45
40
–120
105
0
FREQUENCY (MHz)
01679-014
35
30
Figure 14. Single Tone at 160 MHz; 210 MSPS
0
0.5
1.0
1.5
2.0
2.5
PULSE WIDTH (ns)
3.0
3.5
Figure 17. SNR/SINAD vs. Clock Positive Pulse Width
(fS = 210 MSPS, AIN = 70 MHz)
Rev. A | Page 13 of 20
4.0
01679-017
AMPLITUDE (dB)
120
01679-016
50.5
AD9410
0
–20
2.51
–40
2.50
–60
2.49
–80
2.48
–100
2.47
105
0
FREQUENCY (MHz)
2.46
01679-018
–120
4.0
4.6
4.8
5.0
5.2
5.4
5.6
Figure 21. VREFOUT vs. Analog 5 V Supply
55.5
460
55.0
410
IAhi3
360
SNR
53.5
53.0
52.5
SINAD
310
260
210
160
IAhi5
110
60
51.5
–40
10
100
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
01679-019
52.0
Ivdd
120
140
160
180
200
220
SAMPLE RATE (MSPS)
Figure 19. SNR/SINAD vs. Temperature, 210 MSPS, AIN = 70 MHz
01679-022
54.0
SUPPLY CURRENT (mA)
54.5
Figure 22. Power Supply Currents vs. Sample Rate
74
2.55
72
2.50
H2
70
2.45
VREF (V)
68
66
H3
64
2.40
2.35
62
2.30
58
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
01679-020
60
2.25
0
0.5
1.0
1.5
LOAD CURRENT (mA)
Figure 23. VREFOUT vs. ILOAD
Figure 20. Second and Third Harmonics vs. Temperature;
AIN = 70 MHz, 210 MSPS
Rev. A | Page 14 of 20
2.0
2.5
01679-023
SNR/SINAD (dB)
4.4
ANALOG SUPPLY (V)
Figure 18. Two Tone Test AIN1 = 80.3 MHz, AIN2 = 81.3 MHz
SECOND AND THIRD HARMONIC AMPLITUDE (dB)
4.2
01679-021
VREF (V)
AMPLITUDE (dB)
2.52
ENCODE = 210MSPS
AIN1, AIN2 = –7dBFS
SFDR = 62dBFS
AD9410
5.1
2.503
2.502
TIMING SPECIFICATIONS (ns)
4.9
2.500
2.499
2.498
tV
4.5
4.3
tCPD
–20
0
20
40
TEMPERATURE (°C)
60
80
Figure 24. VREFOUT vs. Temperature
3.9
–40
–20
0
20
40
TEMPERATURE (°C)
60
Figure 25. tPD, tV, tCPD vs. Temperature
Rev. A | Page 15 of 20
80
01679-025
2.497
2.496
–40
tPD
4.7
4.1
01679-024
VREF (V)
2.501
AD9410
THEORY OF OPERATION
Clock Input
Any high speed ADC is extremely sensitive to the quality of the
sampling clock provided by the user. A track-and-hold circuit is
essentially a mixer, and any noise, distortion, or timing jitter on
the clock combines with the desired signal at the ADC output.
For that reason, considerable care has been taken in the design
of the clock input of the AD9410, and the user is advised to give
commensurate thought to the clock source. To limit SNR
degradation to less than 1 dB, a clock source with less than
1.25 ps rms jitter is required for sampling at Nyquist (for
example, the Valpey Fisher VF561). Note that required jitter
accuracy is a function of input frequency and amplitude. Refer
to the Analog Devices, Inc. AN-501 application note, Aperture
Uncertainty and ADC System Performance, for more
information.
The clock input is fully TTL/CMOS compatible. The clock
input can be driven differentially or with a single-ended signal.
Best performance is obtained when driving the clock differentially.
Both clock inputs are self-biased to 1/3 × VCC by a high impedance
resistor divider (see the Equivalent Circuits section). Singleended clocking, which can be appropriate for lower frequency
or nondemanding applications, is accomplished by driving the
clock input directly and placing a 0.1 μF capacitor at CLOCK.
CLK+
CLK–
0.1µF
Figure 26. Driving Single-Ended Clock Input at TTL/CMOS Levels
An example where the clock is obtained from a PECL driver is
shown in Figure 27. Note that the PECL driver is ac-coupled to
the clock inputs to minimize input current loading. The
AD9410 can be dc-coupled to PECL logic levels, resulting in the
clock input currents increasing to approximately 8 mA typical,
which is due to the difference in dc bias between the clock
inputs and a PECL driver (see the Equivalent Circuits section).
0.1µF
CLK+
PECL
GATE
AD9410
0.1µF
510Ω
GND
Figure 27. Driving the Clock Inputs Differentially
01679-027
CLK–
510Ω
Special care was taken in the design of the Analog Input section
of the AD9410 to prevent damage and corruption of data when
the input is overdriven. The nominal input range is 1.5 V diff p-p.
The nominal differential input range is 768 mV p-p × 2.
3.384
AIN
3.000
2.616
AIN
Figure 28. Typical Analog Input Levels
DIGITAL OUTPUTS
AD9410
01679-026
TTL/
CMOS
GATE
The analog input to the AD9410 is a differential buffer. For best
dynamic performance, impedances at AIN and AIN should
match. The analog input has been optimized to provide
superior wideband performance and requires that the analog
inputs be driven differentially. SNR and SINAD performance
degrades significantly if the analog input is driven with a singleended signal. A wideband transformer, such as Mini-Circuits
ADT1-1WT, can be used to provide the differential analog
inputs for applications that require a single-ended-todifferential conversion. Both analog inputs are self-biased by an
on-chip resistor divider to nominal 3 V (see the Equivalent
Circuits section).
01679-028
USING THE AD9410
ANALOG INPUT
INPUT SPAN (V)
The AD9410 architecture is optimized for high speed and ease
of use. The analog inputs drive an integrated high bandwidth
track-and-hold circuit that samples the signal prior to
quantization by the flash 10-bit core. For ease of use, the part
includes an on-board reference and input logic that accepts
TTL, CMOS, or PECL levels.
The digital outputs are TTL/CMOS compatible for lower power
consumption. The outputs are biased from a separate supply
(VDD), allowing easy interface to external logic. The outputs are
CMOS devices that swing from ground to VDD (with no dc
load). It is recommended to minimize the capacitive load the
ADC drives by keeping the output traces short (
