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Teilenummer | AD9049 |
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Beschreibung | 9-Bit/ 30 MSPS ADC | |
Hersteller | Analog Devices | |
Logo | ||
Gesamt 12 Seiten a
FEATURES
Low Power: 300 mW
On-Chip T/H, Reference
Single +5 V Power Supply Operation
Selectable 5 V or 3 V Logic I/O
Wide Dynamic Performance
APPLICATIONS
Digital Communications
Professional Video
Medical Imaging
Instrumentation
9-Bit, 30 MSPS ADC
AD9049
FUNCTIONAL BLOCK DIAGRAM
AINB
AIN
ENCODE
+5V GND
+5V
AD9049
T/H
TIMING
SUM
AMP
REFERENCE CKTS
ADC
DAC
ADC
DECODE
LOGIC
9
PRODUCT DESCRIPTION
The AD9049 is a complete 9-bit monolithic sampling analog-
to-digital converter (ADC) with an onboard track-and-hold and
reference. The unit is designed for low cost, high performance
applications and requires only +5 V and an encode clock to
achieve 30 MSPS sample rates with 9-bit resolution.
The encode clock is TTL compatible and the digital outputs
are CMOS; both can operate with 5 V/3 V logic, selected by the
user. The two-step architecture used in the AD9049 is opti-
mized to provide the best dynamic performance available while
maintaining low power consumption.
A 2.5 V reference is included onboard, or the user can provide
an external reference voltage for gain control or matching of
multiple devices. Fabricated on an advanced BiCMOS process,
the AD9049 is packaged in space saving surface mount pack-
ages (SOIC, SSOP) and is specified over the industrial
(–40°C to +85°C) temperature range.
+5V
AIN
(+3.3V ± 0.512V)
+5V
0.1µF
0.1µF
0.1µF
3 4 2, 8, 11,
20, 22
10
5
AD9049
6
9
13
1, 7, 12,
21, 23
9 BITS
(2)
74AC574
ENCODE
Figure 1. Typical Connections
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 1996
AD9049–Typical Performance Curves
361
342
AIN = 10.3 MHz
323
304
OUTPUTS @ 5V
285
266
247
OUTPUTS @ 3V
228
209
190
171
0
10 20
CLOCK RATE – MSPS
30
Figure 4. Power Dissipation vs. Clock Rate
80
74
HARMONIC DISTORTION
68
ENCODE = 30 MSPS
62
SIGNAL-TO-NOISE
56
50
44
38
1
10
ANALOG INPUT FREQUENCY – MHz
100
Figure 5. SNR/Distortion vs. Frequency
60
58
AIN = 10.3 MHz
56
54
52
50
48
46
0 5 10 15 20 25
CLOCK RATE – MSPS
Figure 6. SNR vs. Clock Rate
30
58
57
56
ENCODE = 30 MSPS
AIN = 10.3 MHz
55
54
53
52
51
50
49
48
–40
– 20
0 20 40 60
TEMPERATURE – °C
80
Figure 7. SNR vs. Temperature
90
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
ENCODE = 30 MSPS
f1 IN = 9.5 MHz @ –7 dBFS
f2 IN = 9.9 MHz @ –7 dBFS
2f1–f2 = –65.4 dBc
2f2–f1 = –65.0 dBc
2.5 5 7.5 10
FREQUENCY – MHz
Figure 8. Two-Tone IMD
12.5
15
0.50
0.25
0.00
–0.25
–0.50
1 23 4 5 6
0.50
0.25
0.00
–0.25
–0.50
1 23 4 5 6
Figure 9. Differential Gain/Differential Phase
–6– REV. A
6 Page AD9049
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
28-Lead SOIC
(R-28)
0.7125 (18.10)
0.6969 (17.70)
29 15
1 14
PIN 1
0.1043 (2.65)
0.0926 (2.35)
0.0291 (0.74)
0.0098 (0.25) x 45°
0.0118 (0.30)
0.0040 (0.10)
0.0500
(1.27)
BSC
0.0192 (0.49)
0.0138 (0.35)
SEATING
PLANE
8°
0.0125 (0.32) 0°
0.0091 (0.23)
0.0500 (1.27)
0.0157 (0.40)
28-Lead SSOP
(RS-28)
0.407 (10.34)
0.397 (10.08)
28 15
1 14
0.078 (1.98) PIN 1
0.068 (1.73)
0.07 (1.79)
0.066 (1.67)
0.008 (0.203)
0.0256
(0.65)
0.002 (0.050) BSC
0.015 (0.38)
0.010 (0.25)
SEATING 0.009 (0.229)
PLANE 0.005 (0.127)
8°
0°
0.03 (0.762)
0.022 (0.558)
–12–
REV. A
12 Page | ||
Seiten | Gesamt 12 Seiten | |
PDF Download | [ AD9049 Schematic.PDF ] |
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