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PDF AD9288 Data sheet ( Hoja de datos )
| Número de pieza | AD9288 | |
| Descripción | Dual A/D Converter | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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FEATURES
Dual 8-bit, 40 MSPS, 80 MSPS, and 100 MSPS ADC
Low power: 90 mW at 100 MSPS per channel
On-chip reference and track-and-hold
475 MHz analog bandwidth each channel
SNR = 47 dB @ 41 MHz
1 V p-p analog input range each channel
Single 3.0 V supply operation (2.7 V to 3.6 V)
Standby mode for single-channel operation
Twos complement or offset binary output mode
Output data alignment mode
Pin-compatible 10-bit upgrade available
APPLICATIONS
Battery-powered instruments
Hand-held scopemeters
Low cost digital oscilloscopes
I and Q communications
GENERAL DESCRIPTION
The AD9288 is a dual 8-bit monolithic sampling analog-to-
digital converter with on-chip track-and-hold circuits. It is
optimized for low cost, low power, small size, and ease of use.
The product operates at a 100 MSPS conversion rate with
outstanding dynamic performance over its full operating range.
Each channel can be operated independently.
The ADC requires only a single 3.0 V (2.7 V to 3.6 V) power
supply and an Encode clock for full-performance operation. No
external reference or driver components are required for many
applications. The digital outputs are TTL/CMOS-compatible,
and a separate output power supply pin supports interfacing
with 3.3 V or 2.5 V logic.
8-Bit, 40/80/100 MSPS
Dual A/D Converter
AD9288
FUNCTIONAL BLOCK DIAGRAM
VDD
ENCA
AINA
AINA
REFINA
REFOUT
REFINB
AINB
AINB
ENCB
TIMING
AD9288
8
T/H ADC
REF
T/H
TIMING
8
ADC
8
D7A–D0A
SELECT 1
SELECT 2
DATA FORMAT
SELECT
8
D7B–D0B
VD GND
Figure 1.
VDD
The Encode input is TTL/CMOS-compatible, and the 8-bit
digital outputs can be operated from 3.0 V (2.5 V to 3.6 V)
supplies. User-selectable options offer a combination of standby
modes, digital data formats, and digital data timing schemes. In
standby mode, the digital outputs are driven to a high
impedance state.
Fabricated on an advanced CMOS process, the AD9288 is
available in a 48-lead surface-mount plastic package (7 mm ×
7 mm, 1.4 mm LQFP) specified over the industrial temperature
range (–40°C to +85°C). The AD9288 is pin-compatible with
the 10-bit AD9218, facilitating future system migrations.
Rev. C
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: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
1 page  
AD9288
Parameter
DYNAMIC PERFORMANCE6
Transient Response
Overvoltage Recovery Time
Signal-to-Noise Ratio (SNR)
(without Harmonics)
fIN = 10.3 MHz
fIN = 26 MHz
fIN = 41 MHz
Signal-to-Noise Ratio
(SINAD) (with Harmonics)
fIN = 10.3 MHz
fIN = 26 MHz
fIN = 41 MHz
Effective Number of Bits
fIN = 10.3 MHz
fIN = 26 MHz
fIN = 41 MHz
Second Harmonic Distortion
fIN = 10.3 MHz
fIN = 26 MHz
fIN = 41 MHz
Third Harmonic Distortion
fIN = 10.3 MHz
fIN = 26 MHz
fIN = 41 MHz
Two-Tone Intermod
Distortion (IMD)
fIN = 10.3 MHz
Temp
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
Test
Level
V
V
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
V
AD9288BST-100
Min Typ
Max
2
2
47.5
47.5
44 47.0
47
47
44 47
7.5
7.5
7.0 7.5
70
70
55 70
60
60
52 60
60
AD9288BST-80
Min Typ
Max
2
2
47.5
44 47
47
44 47
47
7.5
7.0 7.5
7.5
70
55 70
70
60
55 60
60
60
AD9288BST-40
Min Typ
Max
2
2
44 47.5
dB
dB
dB
44 47
7.0 7.5
55 70
55 60
60
Unit
ns
ns
dB
dB
dB
Bits
Bits
Bits
dBc
dBc
dBc
dBc
dBc
dBc
dBc
1 Gain error and gain temperature coefficient are based on the ADC only (with a fixed 1.25 V external reference).
2 tV and tPD are measured from the 1.5 V level of the Encode input to the 10%/90% levels of the digital outputs swing. The digital output load during test is not to exceed
an ac load of 10 pF or a dc current of ±40 µA.
3 Digital supply current based on VDD = 3.0 V output drive with < 10 pF loading under dynamic test conditions.
4 Power dissipation measured under the following conditions: fS = 100 MSPS, analog input is –0.7 dBFS, both channels in operation.
5 Standby dissipation calculated with Encode clock in operation.
6 SNR/harmonics based on an analog input voltage of –0.7 dBFS referenced to a 1.024 V full-scale input range.
EXPLANATION OF TEST LEVELS
Level
Description
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;
100% production tested at temperature extremes for military devices.
Rev. C | Page 4 of 24
5 Page 
AD9288
49
AIN = 10.3MHz
SNR
SINAD
48
47
46
45
30 40 50 60 70 80 90 100 110
MSPS
Figure 12. SINAD/SNR vs. Encode Rate
50
SNR
46 SINAD
AIN = 10.3MHz
42
38
34
30
7.0
6.5 6.0 5.5 5.0 4.5 4.0 3.5
ENCODE HIGH PULSE WIDTH (ns)
3.0
Figure 13. SINAD/SNR vs. Encode Pulse Width High
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
–4.5
–5.0
–5.5
0
ENCODE RATE = 100MSPS
–3dB
100 200 300 400 500 600
BANDWIDTH (MHz)
Figure 14. ADC Frequency Response: fS = 100 MSPS
190
AIN = 10.3MHz
185
180
175
170
165
160
155
150
145
140
0
10 20 30 40 50 60 70 80 90 100
MSPS
Figure 15. Analog Power Dissipation vs. Encode Rate
48.0
47.5
ENCODE RATE = 100MSPS
AIN = 10.3MHz
47.0
46.5
46.0
SINAD
SNR
45.5
45.0
44.5
44.0
43.5
–40
25
85
TEMPERATURE (°C)
Figure 16. SINAD/SNR vs. Temperature
0.6
ENCODE RATE = 100MSPS
0.4 AIN = 10.3MHz
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–40
25
85
TEMPERATURE (°C)
Figure 17. ADC Gain vs. Temperature (with External 1.25 V Reference)
Rev. C | Page 10 of 24
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet AD9288.PDF ] | |
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