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Analog Devices Semiconductor Electronic Components Datasheet

AD9002 Datasheet

High Speed 8-Bit Monolithic A/D Converter

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AD9002 pdf
a
High Speed 8-Bit
Monolithic A/D Converter
AD9002
FEATURES
150 MSPS ENCODE Rate
Low Input Capacitance: 17 pF
Low Power: 750 mW
–5.2 V Single Supply
MIL-STD-883 Compliant Versions Available
APPLICATIONS
Radar Systems
Digital Oscilloscopes/ATE Equipment
Laser/Radar Warning Receivers
Digital Radio
Electronic Warfare (ECM, ECCM, ESM)
Communication/Signal Intelligence
GENERAL DESCRIPTION
The AD9002 is an 8-bit, high speed, analog-to-digital converter.
The AD9002 is fabricated in an advanced bipolar process that
allows operation at sampling rates in excess of 150 MSPS. Func-
tionally, the AD9002 is comprised of 256 parallel comparator
stages whose outputs are decoded to drive the ECL compatible
output latches.
An exceptionally wide, large signal, analog input bandwidth of
160 MHz is due to an innovative comparator design and very
close attention to device layout considerations. The wide input
bandwidth of the AD9002 allows very accurate acquisition of
high speed pulse inputs without an external track-and-hold. The
comparator output decoding scheme minimizes false codes,
which is critical to high speed linearity.
The AD9002 provides an external hysteresis control pin that
can be used to optimize comparator sensitivity to further improve
performance. Additionally, the AD9002’s low power dissipation
of 750 mW makes it usable over the full extended temperature
range. The AD9002 also incorporates an overflow bit to indicate
overrange inputs. This overflow output can be disabled with the
overflow inhibit pin.
FUNCTIONAL BLOCK DIAGRAM
OVERFLOW
INH
ANALOG IN
+VREF
REFMID
–VREF
ENCODE
ENCODE
AD9002
R 256
OVERFLOW
R
255
BIT 8 (MSB)
D
E
BIT 7
RC
128
O
DL
BIT 6
IA
R/2
NT
GC
BIT 5
H
R/2 L
127 O
BIT 4
G
I
R C BIT 3
2 BIT 2
R
1
BIT 1 (LSB)
GND HYSTERESIS
–VS
The AD9002 is available in two grades, one with 0.5 LSB linearity
and one with 0.75 LSB linearity. Both versions are offered in an
industrial grade, –25°C to +85°C, packaged in a 28-lead DIP
and a 28-leaded JLCC. The military temperature range devices,
–55°C to +125°C, are available in a ceramic DIP package and
complies with MIL-STD-883 Class B.
REV. G
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.


Analog Devices Semiconductor Electronic Components Datasheet

AD9002 Datasheet

High Speed 8-Bit Monolithic A/D Converter

No Preview Available !

AD9002 pdf
AD9002–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS (–VS = –5.2 V, Differential Reference Voltage = 2.0 V, unless otherwise noted.)
Parameter
AD9002AD/AJ
AD9002BD/BJ
AD9002SD
AD9002TD
Temp Min Typ Max Min Typ Max Min Typ Max Min Typ Max Unit
RESOLUTION
8 8 8 8 Bits
DC ACCURACY
Differential Linearity
Integral Linearity
No Missing Codes
25°C
Full
25°C
Full
Full
0.6 0.75
0.4 0.5
0.6 0.75
0.4 0.5 LSB
1.0 0.75 1.0
0.75 LSB
0.6 1.0
0.4 0.5
0.6 1.0
0.4 0.5 LSB
1.2 1.2 1.2 1.2 LSB
Guaranteed
Guaranteed
Guaranteed
Guaranteed
INITIAL OFFSET ERROR
Top of Reference Ladder
Bottom of Reference Ladder
Offset Drift Coefficient
25°C
Full
25°C
Full
Full
8 14
17
4 10
12
20
8 14
17
4 10
12
20
8 14
17
4 10
12
20
8 14
17
4 10
12
20
mV
mV
mV
mV
µV/°C
ANALOG INPUT
Input Bias Current1
Input Resistance
Input Capacitance
Large Signal Bandwidth2
Input Slew Rate3
25°C
60 200
60 200
60 200
60 200 µA
Full 200 200 200 200 µA
25°C 25 200
25 200
25 200
25 200
k
25°C
17 22
17 22
17 22
17 22
pF
25°C
160
160
160
160 MHz
25°C
440
440
440
440 V/µs
REFERENCE INPUT
Reference Ladder Resistance
25°C 40 80 110 40 80 110 40 80 110 40 80 110
Ladder Temperature Coefficient 0.25 0.25 0.25 0.25 /°C
Reference Input Bandwidth
25°C
10
10
10
10 MHz
DYNAMIC PERFORMANCE
Conversion Rate
Aperture Delay
Aperture Uncertainty (Jitter)
Output Delay (tPD)4, 5
Transient Response6
Overvoltage Recovery Time7
Output Rise Time4
Output Fall Time4
Output Time Skew4, 8
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
125 150
1.3
15
2.5 3.7 5.5
6
6
3.0
2.5
0.6
125 150
1.3
15
2.5 3.7 5.5
6
6
3.0
2.5
0.6
125 150
1.3
15
2.5 3.7 5.5
6
6
3.0
2.5
0.6
125 150
1.3
15
2.5 3.7 5.5
6
6
3.0
2.5
0.6
MSPS
ns
ps
ns
ns
ns
ns
ns
ns
ENCODE INPUT
Logic “1” Voltage4
Logic “0” Voltage4
Logic “1” Current
Logic “0” Current
Input Capacitance
ENCODE Pulsewidth (Low)9
ENCODE Pulsewidth (High)9
Full
Full
Full
Full
25°C
25°C
25°C
–1.1
3
1.5
1.5
–1.1
–1.5
150
120
3
1.5
1.5
–1.1
–1.5
150
120
3
1.5
1.5
–1.1
–1.5
150
120
3
1.5
1.5
V
–1.5 V
150 µA
120 µA
pF
ns
ns
OVERFLOW INHIBIT INPUT
0 V Input Current
Full
144 300
AC LINEARITY10
Effective Bits11
In-Band Harmonics
DC to 1.23 MHz
DC to 9.3 MHz
DC to 19.3 MHz
Signal-to-Noise Ratio12
Two Tone Intermod Rejection13
25°C
25°C
25°C
25°C
25°C
25°C
48
46
7.6
55
50
44
47.6
60
48
46
DIGITAL OUTPUTS4
Logic “1” Voltage
Logic “0” Voltage
Full –1.1
Full
–1.1
–1.5
POWER SUPPLY14
Supply Current (–5.2 V)
Nominal Power Dissipation
Reference Ladder Dissipation
Power Supply Rejection Ratio15
25°C
Full
25°C
25°C
25°C
145 175
200
750
50
0.8 1.5
NOTES
1Measured with AIN = 0 V.
2Measured by FFT analysis where fundamental is –3 dBc.
3Input slew rate derived from rise time (10% to 90%) of full-scale input.
4Outputs terminated through 100 to –2 V.
5Measured from ENCODE in to data out for LSB only.
6For full-scale step input, 8-bit accuracy is attained in specified time.
7Recovers to 8-bit accuracy in specified time after 150% full-scale input overvoltage.
8Output time skew includes high-to-low and low-to-high transitions as well as
144 300
144 300
144 300 µA
7.6 7.6 7.6 Bits
55 48 55 48 55 dB
50 50 50 dB
44 44 44 dB
47.6 46 47.6 46 47.6 dB
60 60 60 dB
–1.1
–1.5
–1.1
–1.5
V
–1.5 V
145 175
200
750
50
0.8 1.5
145 175
200
750
50
0.8 1.5
145 175
200
750
50
0.8 1.5
mA
mA
mW
mW
mV/V
bit-to-bit time skew differences.
9ENCODE signal rise/fall times should be less than 10 ns for normal operation.
10Measured at 125 MSPS ENCODE rate.
11Analog input frequency = 1.23 MHz.
12RMS signal to rms noise, with 1.23 MHz analog input signal.
13Input signals 1 V p-p @ 1.23 MHz and 1 V p-p @ 2.30 MHz.
14Supplies should remain stable within ± 5% for normal operation.
15Measured at –5.2 V ± 5%.
Specifications subject to change without notice.
–2– REV. G


Part Number AD9002
Description High Speed 8-Bit Monolithic A/D Converter
Maker Analog Devices
Total Page 8 Pages
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