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AD9040A 데이터시트 PDF




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부품번호 AD9040A 기능
기능 10-Bit 40 MSPS A/D Converter
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AD9040A 데이터시트, 핀배열, 회로
10-Bit 40 MSPS
A/D Converter
AD9040A
FEATURES
Low Power: 940 mW
53 dB SNR @ 10 MHz AIN
On-Chip Track-and-Hold, Reference
CMOS Compatible
2 V p-p Analog Input
Fully Characterized Dynamic Performance
AIN
GND
FUNCTIONAL BLOCK DIAGRAM
ENCODE
T/H
AMP
ARRAY
T/H T/H
APPLICATIONS
Ultrasound Medical Imaging
Digital Oscilloscopes
Professional Video
Digital Communications
Advanced Television (MUSE Decoders)
OInstrumentation
VOUT
BAND GAP
REFERENCE
5-BIT
ADC
6-BIT
ADC
VREF
BPREF
REF
AMP
AD9040A
DECODE
LOGIC
ERROR
CORRECTION
DECODE
LOGIC
10
BSOGENERAL DESCRIPTION
The AD9040A is a complete 10-bit monolithic sampling analog-
Lto-digital converter (ADC) with on-board track-and-hold (T/H)
and reference. The unit is designed for low cost, high perfor-
Emance applications and requires only an encode signal to achieve
T40 MSPS sample rates with 10-bit resolution.
EDigital inputs and outputs are CMOS compatible; the analog
PRODUCT HIGHLIGHTS
1. CMOS compatible logic for direct interface to ASICs.
2. On-board track-and-hold provides excellent high frequency
performance on analog inputs, critical for communications
and medical imaging applications.
3. High input impedance and 2 V p-p input range reduce need
for external amplifiers.
input requires a signal of 2 V p-p amplitude. The two-step
4. Easy to use; no cumbersome external voltage references
architecture used in the AD9040A is optimized to provide the
required, allowing denser packing of ADCs for multichannel
best dynamic performance available while maintaining low
applications.
power requirements of only 940 mW typically; maximum dissi-
5. Available in 28-lead PDIP and SOIC packages.
pation is 1.1 W at 40 MSPS.
6. Evaluation board includes AD9040AJR, reconstruction DAC,
and latches. Space is available near the analog input and digital
The signal-to-noise ratio (SNR), including harmonics, is 53 dB,
outputs of the converter for additional circuits. Order as part
or 8.5 ENOB, when sampling an analog input of 10.3 MHz at
number AD9040A/PCB (schematic shown in data sheet).
40 MSPS. Competitive devices perform at less than 7.5 ENOB
and require external references and larger input signals.
The AD9040A A/D converter is available in either a 28-lead
PDIP or a 28-lead SOIC package. The two models operate over
a commercial temperature range of 0°C to 70°C. Contact the
factory regarding availability of ceramic military temperature
range devices.
REV. D
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. 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 companies.
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 © 2003 Analog Devices, Inc. All rights reserved.




AD9040A pdf, 반도체, 판매, 대치품
AD9040A
ABSOLUTE MAXIMUM RATINGS1
± VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 7 V
VD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . –VS to +VS
Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to +VS
VREF Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to +VS
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Operating Temperature
AD9040AJN/AD9040AJR . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage Temperature . . . . . . . . . . . . . . . . . –65°C to +150°C
Maximum Junction Temperature2 (JN/JR Suffixes) . . . . 150°C
Lead Soldering Temp (10 sec) . . . . . . . . . . . . . . . . . . . . 300°C
NOTES
1Absolute maximum ratings are limiting values to be applied individually and
beyond which the serviceability of the circuit may be impaired. Functional
operability is not necessarily implied. Exposure to absolute maximum rating
conditions for an extended period of time may affect device reliability.
2Typical thermal impedances (parts soldered to board):
N Package (PDIP): JA = 42°C/W; JC = 10°C/W.
R Package (SOIC): JA = 47°C/W; JC = 10°C/W.
ORDERING GUIDE
Model
AD9040AJN
AD9040AJR
AD9040AJR-REEL
Temperature Range
0°C to 70°C
0°C to 70°C
0°C to 70°C
Package Description
28-Lead PDIP
28-Lead SOIC Package
28-Lead SOIC Package
OBCAUTION
SESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
Oaccumulate on the human body and test equipment and can discharge without detection. Although the
AD9040A features proprietary ESD protection circuitry, permanent damage may occur on devices
Lsubjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended
ETEto avoid performance degradation or loss of functionality.
Package Option
N-28
R-28
R-28
N
AIN
N+1
ENCODE
DIGITAL
OUTPUTS
tA NO. 2
tEH tEL
tPD
N–3
N–2
NO. 3
N–1
SYMBOL
tA
tEH
tEL
tPD
DESCRIPTION
APERTURE DELAY
PULSEWIDTH HIGH
PULSEWIDTH LOW
OUTPUT PROP DELAY
MIN
10ns
10ns
7.5ns
TYP
1.9ns
10ns
MAX
100ns
100ns
12ns
Figure 1. Timing Diagram
–4– REV. D

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AD9040A 전자부품, 판매, 대치품
Typical Performance Characteristics–AD9040A
–73
ENCODE = 40.5MSPS
1.2 66 66
–68 HARMONIC
1.0
DISTORTION
60 60
–63
0.8 54 54 AIN = 10.3MHz
SNR
–58
0.6 48 48
–53
0.4 42 42
–48
1
2
4 6 10 20
40 60
1 2 4 6 10 20 40 60 100
4 12 20 28 36
CLOCK RATE (MSPS)
FREQUENCY (MHz)
CLOCK RATE (MSPS)
TPC 1. Power Dissipation
vs. Clock Rate
O1.0
BSO0.5
LET0
E0 10 20 30 40
TPC 2. Harmonic Distortion
and SNR vs. Analog Input
1024
896
768
640
512
384
256
128
0
0 5 10 15 20 25 30 35 40 45 50
TPC 3. SNR vs. Clock Rate
1024
992
960
928
96
64
32
0
0 5 10 15 20 25 30 35 40 45 50
CLOCK RATE (MSPS)
TIME (ns)
TIME (ns)
TPC 4. Differential Nonlinearity
vs. Clock Rate
TPC 5. Transient Response
TPC 6. Transient Response
(Expanded View)
60
ENCODE = 32.2MSPS
55
50 ENCODE = 40.5MSPS
45
AIN = 10.3MHz
40
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (؇C)
TPC 7. SNR vs. Temperature
0
–65
ENCODE = 32.2MSPS
ANALOG IN = 2.3MHz
SNR = 56.79dB
SNR (w/o har.) = 57.58dB
SECOND HARMONIC = –68.5dB
THIRD HARMONIC = 80.7dB
0 8.0
FREQUENCY (MHz)
TPC 8. FFT Response
16.1
0
ENCODE = 32.2MSPS
ANALOG IN = 10.3MHz
SNR = 55.37dB
SNR (w/o har.) = 56.77dB
SECOND HARMONIC = –63.3dB
THIRD HARMONIC = –75.4dB
–65
0 8.0
FREQUENCY (MHz)
TPC 9. FFT Response
16.1
REV. D
–7–

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AD9040A

10-Bit 40 MSPS A/D Converter

Analog Devices
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