ANALOG DEVICES AD10677 Service Manual

www.BDTIC.com/ADI

16-Bit, 65 MSPS A/D Converter

FEATURES

65 MSPS sample rate
80 dBFS signal-to-noise ratio
Transformer-coupled analog input
Single PECL clock source
Digital outputs

True bi nary form at

3.3 V and 5 V CMOS-compatible

APPLICATIONS

Low signature radar
Medical imaging
Communications instrumentation
Instrumentation
Antenna array processing

GENERAL DESCRIPTION

The AD10677 is a 16-bit, high performance, analog-to-digital
converter (ADC) for applications that demand increased SNR
levels. Exceptional noise performance and a typical signal-to­noise ratio of 80 dBFS are obtained by digitally postprocessing
the outputs of four ADCs. A single analog input and PECL
sampling clock and 3.3 V and 5 V power supplies are required.

FUNCTIONAL BLOCK DIAGRAM

AIN

AIN

14

14

DIGITAL

POST-

PROCES-

14

SING

14

CLOCK
DISTRIBUTION CIRCUIT

DGND DGND

Figure 1.

ANALOG

POWER

AGND
+5VA
+3.3VE
AGND

ADC

ADC

ADC

ADC

PRODUCT HIGHLIGHTS

1. Guaranteed sample rate of 65 MSPS.

nput signal conditioning with optimized noise

2. I

performance.

3. F

ully tested and guaranteed performance.

AD10677

AD10677

D

0

OUT

15

D

OUT

+3.3V

DIGITAL POWERENCODE ENCODE

OUTPUT
DATA
BITS

03208-B-001

The AD10677 is assembled using a 0.062-inch laminate board
wi

th three sets of connector interface pads to accommodate
analog and digital isolation. Analog Devices recommends
using the FSI-110-03-G-D-AD-K-TR connector from Samtec.
The overall card fits a 2.2 inch × 2.8 inch PCB specified from
0°C to 70°C.

Rev. D

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
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: [phone] www.analog.com
Fax: [phone] ©2006 Analog Devices, Inc. All rights reserved.

AD10677

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TABLE OF CONTENTS

Features .............................................................................................. 1

Pin Configurations and Function Descriptions ............................7

Applications....................................................................................... 1

General Description......................................................................... 1

Functional Block Diagram .............................................................. 1

Product Highlights........................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

DC Specifications ......................................................................... 3

Digital Specifications ................................................................... 3

AC Specifications.......................................................................... 4

Switching Specifications .............................................................. 4

Absolute Maximum Ratings............................................................ 5

Explanation of Test Levels........................................................... 5

Operating Range........................................................................... 5

ESD Caution.................................................................................. 5

Test Cir c ui t s ....................................................................................... 6

Typical Perf or m an c e Charac t e r istics ..............................................9

Te r mi n ol o g y .................................................................................... 11

Theory of Operation ...................................................................... 12

Thermal Considerations............................................................ 12

Input Stage................................................................................... 12

Encoding the AD10677 ............................................................. 12

Output Loading .......................................................................... 12

Analog and Digital Power Supplies.......................................... 12

Analog and Digital Grounding................................................. 13

Other Notes................................................................................. 13

Evaluation Board ........................................................................ 13

Outline Dimensions ....................................................................... 18

Ordering Guide .......................................................................... 18

REVISION HISTORY

5/06—Rev. C to Rev. D

Changes to Figure 9.......................................................................... 8

Edits to Table 8................................................................................ 13

Edits to Figure 19............................................................................ 14

3/05—Rev. B to Rev. C

C

hanges to Figure 1.......................................................................... 1

Changes to Figure 2 and Figure 3................................................... 6

Added Figure 6 to Figure 8.............................................................. 7

Reformatted Table 7 ......................................................................... 7

Changes to Figure 9.......................................................................... 8

Changes to Figure 10 to Figure 13.................................................. 9

Reformatted Theory of Operation Section ................................. 12

Changes to Figure 19...................................................................... 14

12/03—Rev. A to Rev. B

pdated Format..................................................................Universal

U

Changes to Table 1 and Footnotes...................................................3

Changes to Theory of Operation.................................................. 12

Changes to Ordering Guide.......................................................... 20

8/03—Rev. 0 to Rev. A

hanges to Specifications..................................................................2

C

Changes to Table 1..............................................................................4

Changes to Definition of Specifications....................................... 10

Updated Outline Dimensions........................................................ 18

11/02—Revision 0: Initial Version

Rev. D | Page 2 of 20

AD10677

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SPECIFICATIONS

DC SPECIFICATIONS

AVCC = 5 V, EVCC = 3.3 V, VDD = 3.3 V, TA = 25°C, differential encode = 65 MSPS, C

Table 1.

Parameter Test Level Min Typ Max Unit

RESOLUTION 16 Bits

Offset Error I –0.30 +0.12 +0.30 %FS
Gain Error I –7 +7 %FS
Differential Nonlinearity (DNL) V ±0.7 LSB
Integral Nonlinearity (INL) V ±4 LSB

TEMPERATURE DRIFT

Offset Error V 13 ppm/ºC

Gain Error V 200 ppm/ºC
POWER SUPPLY REJECTION RATIO (PSRR) V 60 dB
ANALOG INPUTS (AIN, AIN)

1

Differential Input Voltage Range V 2.15 V p-p

Differential Input Resistance V 50 Ω

Differential Input Capacitance V 2.5 nF

Input Bandwidth IV 0.40 210 MHz

2

VSWR

V 1.04:1 Ratio

POWER SUPPLY3

Supply Current

IAVCC (AVCC = 5.0 V) I 0.95 1.05 A

IEVCC (EVCC = 3.3 V) I 0.15 0.2 A

IVDD (V

Total Power Dissipation

1

Measurement includes the recommended interface connector.

2

Input VSWR, see Figure 15.

3

Supply voltages should remain stable within 65% for normal operation. However, rated ac (harmonics) performance is valid only over the range AV

4

Power dissipation measured with encode at rated speed and −1 dBFS analog input at 10 MHz.

= 3.3 V) I 0.49 0.625 A

DD

4

I 6.86 7.5 W

≤ 10 pF, unless otherwise noted.

LOAD

= 5.0 V to 5.25 V.

CC

DIGITAL SPECIFICATIONS

AVCC = 5 V, EVCC = 3.3 V, VDD = 3.3 V, TA = 25°C, differential encode = 65 MSPS, C

Table 2.

Parameter Test Level Min Typ Max Unit

ENCODE INPUTS (ENCODE, ENCODE)

Differential Input Voltage Range IV 0.4 V p-p
Differential Input Resistance V 100 Ω
Differential Input Capacitance V 160 pF

LOGIC OUTPUTS (D15 to D0)

Logic Compatibility CMOS
Logic 1 Voltage I
Logic 0 Voltage I

≤ 100 mA IV 0.9 × V

LOAD

≤ 100 mA IV 0.4 V

LOAD

Output Coding True binary
Series Output Resistance per Bit 120 Ω

Rev. D | Page 3 of 20

≤ 10 pF, unless otherwise noted.

LOAD

V

DD

AD10677

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AC SPECIFICATIONS

AVCC = 5 V, EVCC = 3.3 V, VDD = 3.3 V, TA = 25°C, differential encode = 65 MSPS, C

Table 3.

Parameter Test Level Min Typ Max Unit

1

SNR

Analog Input 2.5 MHz I 77.5 80 dBFS

@ –1 dBFS 10 MHz I 77.5 80 dBFS
30 MHz I 76.5 78.5 dBFS
SINAD2

Analog Input 2.5 MHz I 77.2 79 dBFS

@ –1 dBFS 10 MHz I 77.2 79 dBFS

30 MHz I 74.5 77 dBFS

3

SFDR

Analog Input 2.5 MHz I 84 92 dBFS

@ –1 dBFS 10 MHz I 84 92 dBFS
30 MHz I 79.5 84 dBFS
TWO-TONE

4

Analog Input

@ –7 dBFS—IMD

f1 = 10 MHz, f2 = 12 MHz V 96 dBFS

1

Analog input signal power at –1 dBFS; signal-to-noise (SNR) is the ratio of signal level to total noise (first five harmonics removed). Encode = 65 MSPS. SNR is reported

in dBFS, related back to converter full scale.

2

Analog input signal power at –1 dBFS; signal-to-noise and distortion (SINAD) is the ratio of signal level to total noise + harmonics. Encode = 65 MSPS. SINAD is

reported in dBFS, related back to converter full scale.

3

Analog input signal at –1 dBFS; SFDR is the ratio of converter full scale to the worst spur.

4

Both input tones at –7 dBFS; two-tone intermodulation distortion (IMD) rejection is the ratio of either tone to the worst third-order intermodulation product.

≤ 10 pF, unless otherwise noted.

LOAD

SWITCHING SPECIFICATIONS

AVCC = 5 V, EVCC = 3.3 V, VDD = 3.3 V, TA = 25°C, differential encode = 65 MSPS, C

Table 4.

Parameter Test Level Min Typ Max Unit

MAXIMUM CONVERSION RATE I 65 MSPS
MINIMUM CONVERSION RATE IV 15 MSPS
DUTY CYCLE IV 40 60 %
ENCODE INPUT PARAMETERS

Encode Period @ 65 MSPS, t

ENC

Encode Pulse Width High @ 65 MSPS, t
Encode Pulse Width Low @ 65 MSPS, t

ENCH

ENCL

V 15.4 ns
V 7.7 ns
V 7.7 ns

ENCODE/DATA (D15:D0)

Propagation Delay, t
Valid Time, t

PDL

APERTURE DELAY, t

PDH

A

APERTURE UNCERTAINTY (JITTER), t

J

6.7 ns

7.3 ns
V 480 ps
V 500 fs rms

PIPELINE DELAYS V 9 Cycles

≤ 10 pF, unless otherwise noted.

LOAD

Rev. D | Page 4 of 20

AD10677

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ABSOLUTE MAXIMUM RATINGS

Table 5.

Parameter Rating

AV

to AGND 0 V to 7 V

CC

EV

to AGND 0 V to 6 V

CC

V

to DGND –0.5 V to +3.8 V

DD

Analog Input Voltage 0 V to AV
Analog Input Current 25 mA
Encode Input Voltage 0 V to 5 V
Digital Output Voltage –0.5 V to V
Maximum Junction Temperature 150°C
Storage Temperature Range Ambient –65°C to +150°C
Maximum Operating Temperature Ambient 92°C

Table 6. Output Coding (True Binary)

Code AIN (V) Digital Output

65535 +1.1 1111 1111 1111 1111
. .
. .
. .
32768 0 1000 0000 0000 0000
32767 –0.000034 0111 1111 1111 1111
. .
. .
. .
0 –1.1 0000 0000 0000 0000

CC

DD

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.

EXPLANATION OF TEST LEVELS

I. 100% production tested.
II 100% production tested at 25°C and sample tested at

sp

ecified temperatures.
III. Sample tested only.
IV. Parameter is guaranteed by design and characterization

sting.

te

V. Parameter is a typical value only.

100% production tested at 25°C; guaranteed by design and
c

haracterization testing for industrial temperature range; 100%

production tested at temperature extremes for military devices.

OPERATING RANGE

Operating ambient temperature range: 0°C to 70°C. See the
Thermal Considerations section.

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the
human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.

Rev. D | Page 5 of 20

AD10677

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TEST CIRCUITS

ANALOG INPUT

t

0

N N+1

N+2 N+3

N+4

N+5

N+6

DATA BITS, D[15:0]

ENCODE, ENCODE

ENC

ENC

Figure 4. Equivalent Encode Input

t

ENC

N N+1 N+2 N+3 N+4 N+5 N+6

t

ENCLtENCH

t

PDH

N–9 N–7N–8 N–6 N–5 N–4

t

PDL

Figure 2. Timing Diagram

V

AV

CH

CC

AIN

AIN

1:1

200Ω 500Ω

25Ω

25Ω

BUF

AV

500Ω

CC

500Ω

BUF

V

CL

V

CH

×4

V

CL

T/H

BUF

T/H

Figure 3. Analog Input Stage

V

DD

MACROCELL

LOGIC

Figure 5. Digital Output Stage

100Ω

EV

CC

37.5kΩ

PECL

DRIVER

03208-B-004

03208-B-002

V

REF

03208-B-003

V

DD

P

120Ω

D0–D

15

N

03208-B-005

Rev. D | Page 6 of 20