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Analog Devices Semiconductor Electronic Components Datasheet

AD9020 Datasheet

10-Bit 60 MSPS A/D Converter

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AD9020 pdf
a
10-Bit 60 MSPS
A/D Converter
AD9020
FEATURES
Monolithic 10-Bit/60 MSPS Converter
TTL Outputs
Bipolar (؎1.75 V) Analog Input
56 dB SNR @ 2.3 MHz Input
Low (45 pF) Input Capacitance
MIL-STD-883-Compliant Versions Available
APPLICATIONS
Digital Oscilloscopes
Medical Imaging
Professional Video
Radar Warning/Guidance Systems
Infrared Systems
GENERAL DESCRIPTION
The AD9020 A/D converter is a 10-bit monolithic converter
capable of word rates of 60 MSPS and above. Innovative archi-
tecture using 512 input comparators instead of the traditional
1024 required by other flash converters reduces input capaci-
tance and improves linearity.
Encode and outputs are TTL-compatible, making the AD9020
an ideal candidate for use in low power systems. An over-
flow bit is provided to indicate analog input signals greater
than +VSENSE.
Voltage sense lines are provided to insure accurate driving of the
± VREF voltages applied to the units. Quarter-point taps on the
resistor ladder help optimize the integral linearity of the unit.
Either 68-pin ceramic leaded (gull wing) packages or ceramic
LCCs are available and are specifically designed for low thermal
impedances. Two performance grades for temperatures of both
0°C to 70°C and –55°C to +125°C ranges are offered to allow
the user to select the linearity best suited for each application.
Dynamic performance is fully characterized and production
tested at 25°C. MIL-STD-883 units are available.
The AD9020 A/D Converter is available in versions compliant
with MIL-STD-883. Refer to the Analog Devices Military Prod-
ucts Databook or current AD9020/883B data sheet for detailed
specifications.
FUNCTIONAL BLOCK DIAGRAM
ANALOG IN
+VREF
+VSENSE
3/4REF
1/2REF
1/4REF
–VSENSE
–VREF
ENCODE
MSB
INVERT
OVERFLOW
LSBS
INVERT
R/2
512
AD9020
R
385
R/2
OVERFLOW
R/2 384 C
O
RM
PD
R AE
257 R
C
A OL
R/2 T D A
O ET
R/2
256
R 1024
10 C
LH
R LO
AG
T
R 129 C
H
I
C
R/2 E
S
R/2
128
R
R
2
R
1
R/2
OVERFLOW
D9 (MSB)
D8
D7
D6
D5
D4
D3
D2
D1
D0 (LSB)
–VS +VS GROUND
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. 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: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001


Analog Devices Semiconductor Electronic Components Datasheet

AD9020 Datasheet

10-Bit 60 MSPS A/D Converter

No Preview Available !

AD9020 pdf
AD9020–SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS1
+VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6 V
–VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –6 V
ANALOG IN . . . . . . . . . . . . . . . . . . . . . . . . . . . –2 V to +2 V
+VREF, –VREF, 3/4REF, 1/2REF, 1/4REF . . . . . . . . . . –2 V to +2 V
+VREF to –VREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0 V
DIGITAL INPUTS . . . . . . . . . . . . . . . . . . . . . . .–0.5 V to +VS
3/4REF, 1/2REF, 1/4REF Current . . . . . . . . . . . . . . . . . . . ± 10 mA
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Operating Temperature
AD9020JE/KE/JZ/KZ . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Maximum Junction Temperature2 . . . . . . . . . . . . . . . . . 150°C
Lead Soldering Temp (10 sec) . . . . . . . . . . . . . . . . . . . . 300°C
ELECTRICAL CHARACTERISTICS (؎VS = ؎5 V; ؎VSENSE = ؎1.75 V; ENCODE = 40 MSPS unless otherwise noted)
Parameter (Conditions)
Temp
Test
Level
AD9020JE/JZ
Min Typ Max
AD9020KE/KZ
Min Typ Max
Unit
RESOLUTION
DC ACCURACY3
Differential Nonlinearity
Integral Nonlinearity
No Missing Codes
25°C
Full
25°C
Full
Full
I
VI
I
VI
VI
10
1.0 1.25
1.5
1.25 2.75
3.0
10
0.75 1.0
1.25
1.0 2.25
2.50
Guaranteed
Bits
LSB
LSB
LSB
LSB
ANALOG INPUT
Input Bias Current4
Input Resistance
Input Capacitance4
Analog Bandwidth
25°C
Full
25°C
25°C
25°C
I
VI
I
V
V
0.4 1.0
2.0
2.0 7.0
45
175
0.4 1.0
2.0
2.0 7.0
45
175
mA
mA
k
pF
MHz
REFERENCE INPUT
Reference Ladder Resistance
Ladder Tempco
Reference Ladder Offset
Top of Ladder
Bottom of Ladder
Offset Drift Coefficient
25°C
Full
Full
25°C
Full
25°C
Full
Full
I
VI
V
I
VI
I
VI
V
22 37 56
14 66
0.1
45 90
90
45 90
90
50
22 37 56
14 66
0.1
45 90
90
45 90
90
50
/°C
mV
mV
mV
mV
µV/°C
SWITCHING PERFORMANCE
Conversion Rate
Aperture Delay (tA)
Aperture Uncertainty (Jitter)
Output Delay (tOD)5
Output Time Skew5
25°C
25°C
25°C
25°C
25°C
I
V
V
I
I
60
1
5
6 10 13
35
60
1
5
6 10 13
35
MSPS
ns
ps, rms
ns
ns
DYNAMIC PERFORMANCE
Transient Response
Overvoltage Recovery Time
Effective Number of Bits (ENOB)
fIN = 2.3 MHz
fIN = 10.3 MHz
fIN = 15.3 MHz
Signal-to-Noise Ratio6
fIN = 2.3 MHz
fIN = 10.3 MHz
fIN = 15.3 MHz
Signal-to-Noise Ratio6
(Without Harmonics)
fIN = 2.3 MHz
fIN = 10.3 MHz
fIN = 15.3 MHz
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
V
V
I
IV
IV
I
I
I
I
I
I
10
10
7.9 9.0
7.6 8.4
7.2 8.0
49.5 56
47.5 53
45.5 50
49.5 56
49.5 54
48 52
10
10
7.9 9.0
7.6 8.4
7.2 8.0
49.5 56
47.5 53
45.5 50
49.5 56
49.5 54
48 52
ns
ns
Bits
Bits
Bits
dB
dB
dB
dB
dB
dB
–2– REV. C


Part Number AD9020
Description 10-Bit 60 MSPS A/D Converter
Maker Analog Devices
Total Page 12 Pages
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