AD9022AQ AD [Analog Devices], AD9022AQ Datasheet

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AD9022AQ

Manufacturer Part Number
AD9022AQ
Description
12-Bit 20 MSPS Monolithic A/D Converter
Manufacturer
AD [Analog Devices]
Datasheet

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PRODUCT DESCRIPTION
The AD9022 is a high speed, high performance, monolithic
12-bit analog-to-digital converter. All necessary functions, in-
cluding track-and-hold (T/H) and reference, are included
on-chip to provide a complete conversion solution. It is a
companion unit to the AD9023; the primary difference between
the two is that all logic for the AD9022 is TTL-compatible,
while the AD9023 utilizes ECL logic for digital inputs and out-
puts. Pinouts for the two parts are nearly identical.
Operating from +5 V and –5.2 V supplies, the AD9022 pro-
vides excellent dynamic performance. Sampling at 20 MSPS
with A
typically 76 dB; with A
typically 65 dB.
The onboard T/H has a 110 MHz bandwidth and, more impor-
tantly, is designed to provide excellent dynamic performance for
analog input frequencies above Nyquist. This feature is neces-
sary in many undersampling signal processing applications, such
as in direct IF-to-digital conversion.
To maintain dynamic performance at higher IFs, monolithic
RF track-and-holds (such as the AD9100 and AD9101
Samplifier™) can be used with the AD9022 to process signals
up to and beyond 70 MHz.
Samplifier is a trademark of Analog Devices, Inc.
REV. B
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
Monolithic
12-Bit 20 MSPS A/D Converter
Low Power Dissipation: 1.4 Watts
On-Chip T/H and Reference
High Spurious-Free Dynamic Range
TTL Logic
APPLICATIONS
Radar Receivers
Digital Communications
Digital Instrumentation
Electro-Optics
IN
= 1 MHz, the spurious-free dynamic range (SFDR) is
IN
= 9.6 MHz, SFDR is 74 dB. SNR is
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
With DNL typically less than 0.5 LSB and 20 ns transient re-
sponse settling time, the AD9022 provides excellent results
when low-frequency analog inputs must be oversampled (such
as CCD digitization). The full scale analog input is 1 V with a
300
from the signal source, or can be buffered by the AD96xx series
of low noise, low distortion buffer amplifiers.
All timing is internal to the AD9022; the clock signal initiates
the conversion cycle. For best results, the encode command
should contain as little jitter as possible. High speed layout
practices must be followed to ensure optimum A/D perfor-
mance.
The AD9022 is built on a trench isolated bipolar process and
utilizes an innovative multipass architecture (see the block
diagram). The unit is packaged in 28-lead ceramic DIPs and
gullwing surface mount packages. The AD9022 is specified to
operate over the industrial (–25 C to +85 C) and military
(–55 C to +125 C) temperature ranges.
ANALOG
ENCODE
INPUT
input impedance. The analog input can be driven directly
T/H
FUNCTIONAL BLOCK DIAGRAM
Monolithic A/D Converter
+2V
REF
5-BIT
ADC
DAC
World Wide Web Site: http://www.analog.com
T/H
AD9022
16
12-Bit 20 MSPS
5-BIT
ADC
DAC
© Analog Devices, Inc., 1998
8
CORRECTION
AD9022
DIGITAL
ERROR
4-BIT
ADC
TTL
12
–5.2V
+5V
GND

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AD9022AQ Summary of contents

Page 1

FEATURES Monolithic 12-Bit 20 MSPS A/D Converter Low Power Dissipation: 1.4 Watts On-Chip T/H and Reference High Spurious-Free Dynamic Range TTL Logic APPLICATIONS Radar Receivers Digital Communications Digital Instrumentation Electro-Optics PRODUCT DESCRIPTION The AD9022 is a high speed, high ...

Page 2

... MHz Full 2 Signal-to-Noise Ratio (Without Harmonics) Analog Input @ 1.2 MHz + 1.2 MHz Full @ 4.3 MHz + 9.6 MHz + 9.6 MHz Full (+ –V = –5.2 V; Encode = 20 MSPS, unless otherwise noted Test AD9022AQ/AZ AD9022BQ/BZ Level Min Typ Max Min Typ Max 0.6 0.75 0.4 VI 1.0 I 1.3 2.5 1.3 VI 1.6 3.0 1.6 ...

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... V S Analog Input . . . . . . . . . . . . . . . . . . . . . . . . . –1 +1.5 V Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +V Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Operating Temperature Range AD9022AQ/AZ/BQ/ – +85 C AD9022SQ/ – +125 C 2 Maximum Junction Temperature . . . . . . . . . . . . . . . . +175 C Lead Temperature (Soldering, 10 sec +300 C Storage Temperature Range . . . . . . . . . . . . – ...

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AD9022 EXPLANATION OF TEST LEVELS Test Level I – 100% production tested. II – 100% production tested at +25 C, and sample tested at specified temperatures. AC testing done on sample basis. III – Sample tested only. IV – Parameter ...

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DEFINITIONS OF SPECIFICATIONS Analog Bandwidth The analog input frequency at which the spectral power of the fundamental frequency (as determined by FFT analysis) is reduced by 3 dB. Aperture Delay The delay between the rising edge of the ENCODE command ...

Page 6

Performance Characteristics AD9022 –76 –75 –74 –73 –72 –71 –70 –69 – ANALOG INPUT FREQUENCY – MHz Figure 2. Harmonic Distortion vs. Analog Input Frequency 1.2MHz IN 80 WORST ...

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FREQUENCY – MHz Figure 8. FFT Plot 9.6MHz IN – –1.0dBFS IN SNR = 66.05dB –20 THD = 74.28dB SFDR = 75.32dBFS –30 ...

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AD9022 This will be true only for converters in which perfect quantiza- tion noise dominates. There may be an upper sample rate, above which the thermal noise of the converter is the dominant source of noise. In this case, normalization ...

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USING THE AD9022 Layout Information Preserving the accuracy and dynamic performance of the AD9022 requires that designers pay special attention to the layout of the printed circuit board. Analog paths should be kept as short as possible and be properly ...

Page 10

AD9022 Analog Input Analog input signals can be directly fed into the device under test input (A ). The A input is terminated at the device with resistor to give a parallel equivalent of 51 DAC ...

Page 11

REV. B Figure 13. Top of Board, Viewed From Top Figure 14. Center of Board, Viewed From Top –11– AD9022 ...

Page 12

AD9022 28-Lead Cerdip (Q-28) 0.005 (0.13) MIN 0.100 (2.54) MAX 28 15 0.610 (15.49) 0.500 (12.70 PIN 1 0.015 1.490 (37.85) MAX (0.38) 0.225 MIN (5.72) MAX 0.200 (5.08) 0.026 (0.66) 0.110 (2.79) 0.070 (1.78) SEATING 0.125 (3.18) ...

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