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PDF AD9049 Data sheet ( Hoja de datos )
| Número de pieza | AD9049 | |
| Descripción | 9-Bit/ 30 MSPS ADC | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AD9049 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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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
1 page  
AD9049
N
N+1
N+2
N+3
N+4
N+5
AIN
ENCODE
DIGITAL
OUTPUTS
tA
tEH tEL
tPD
N–5
N–4
N–3
N–2
N–1
N
MIN
tA APERTURE DELAY
tEH PULSE WIDTH HIGH
10ns
tEL PULSE WIDTH LOW
10ns
tPD OUTPUT PROP DELAY 5.0ns
TYP
2.7ns
8.2ns
MAX
166ns
166ns
15.0ns
Figure 2. Timing Diagram
AINB (Pin 9)
AIN (Pin 10)
VD
8k 8k
INPUT
BUFFER
16k 16k
Analog Input
VD
VREFOUT
(Pin 3)
VDD (Pins 20, 22)
+3V to +5V
D0–D8
ENCODE
(Pin 13)
VD
Output Stage
VD
VREFIN
(Pin 4)
AV
Encode Input
VREFBF
(Pin 6)
VREF Output
Reference Circuit
Figure 3. Equivalent Circuits
REV. A
–5–
5 Page 
AD9049
U3
74AC574R
R5
1k
R4 U2
TP3
J2
1k
2 AD9631Q
IN 6
C9
0.1µF
R3 3 IN OUT
50
U6:B
74AC00R
46
5
J7
R1
50 3
OUT
4 VCC Y1 GND 2
SW41
+5V
12 11
13
U1
AD9049R
3
4
5
6
9
10
13
C1
0.1µF
D8/MSB
VREFOUT
VREFIN
COMP
REFBP
AINB
AIN
ENC
D7
D6
D5
D4
D3
D2
D1
D0
NC
+5V
+5V
15
16
17
18
19
24
25
26
27
20
22
C2
0.1µF
C3
0.1µF
TP2
E1 +5V
+5V
U6:A
74AC00R
1
3
2
9
8
8D
7D
7 6D
6 5D
5 4D
4 3D
3 2D
2 1D
8Q 12
7Q 13
6Q 14
5Q 15
4Q 16
3Q 17
2Q 18
1Q 19
CK OE
11 1
U4
74AC574R
9
8
8D
7D
7 6D
6 5D
5 4D
4 3D
3 2D
2 1D
8Q 12
7Q 13
6Q 14
5Q 15
4Q 16
3Q 17
2Q 18
1Q 19
CK OE
11 1
J3
HDR20
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
+5V
U6:D
74AC00R
J6
+5V
R2
2k
9
10 8
U6:C
74AC00R
J1
C5 +
10µF
C7
0.1µF
+5V
+5V
C10
0.1µF
C12
0.1µF
C13
0.1µF
C14
0.1µF
C15
0.1µF
C16
0.1µF
C17
0.1µF
C22
0.1µF
C23
0.1µF
C24
0.1µF
J5
C6
10µF +
C8
0.1µF
–5.2V
–5.2V
C20
0.1µF
Figure 23. Evaluation Board Schematic
REV. A
–11–
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AD9049.PDF ] | |
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