a
FEATURES
10-Bit, 100 MSPS ADC
Low Power: 450 mW at 100 MSPS
On-Chip Track/Hold
280 MHz Analog Bandwidth
SINAD = 54 dB @ 41 MHz
On-Chip Reference
1 V p-p Analog Input Range
Single 5 V Supply Operation
5 V/3.3 V Outputs
APPLICATIONS
Digital Communications
Signal Intelligence
Digital Oscilloscopes
Spectrum Analyzers
Medical Imaging
Sonar
HDTV
GENERAL DESCRIPTION
AD9071
AIN
AIN
T/H
10-Bit, 100 MSPS
A/D Converter
AD9071
FUNCTIONAL BLOCK DIAGRAM
VREF
IN
VREF
OUT
V
CC
– 2.5V
V
DD
ADC
10
ENCODE
LOGIC
OR
ADC
D0–D9
SUM
AMP
DAC
ENCODE
TIMING
V
CC
GND
The AD9071 is a monolithic sampling analog-to-digital con-
verter with an on-chip track-and-hold circuit and TTL/CMOS
digital interfaces. The product operates at a 100 MSPS conver-
sion rate with outstanding dynamic performance over its full
operating range.
The ADC requires only a single 5 V supply and an encode
clock for full performance operation. The digital outputs are
TTL compatible. Separate output power supply pins support
interfacing with 3.3 V or 5 V logic. An out-of-range output
(OR) is available that indicates a conversion result is outside
the operating range. The output data are held at saturation
levels during an out-of-range condition.
The input amplifier supports differential or single-ended inter-
faces. An internal reference is included.
Fabricated on an advanced BiCMOS process, the AD9071 is
available in a plastic SOIC package specified over the industrial
temperature range (–40°C to +85°C).
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
AD9071–SPECIFICATIONS
Parameter
RESOLUTION
DC ACCURACY
Differential Nonlinearity
1
Integral Nonlinearity
1
No Missing Codes
1
Gain Error
2
Gain Tempco
2
ANALOG INPUT
Input Voltage Range
(With Respect to
AIN)
Common-Mode Voltage
Input Offset Voltage
Input Resistance
Input Capacitance
Input Bias Current
Analog Bandwidth, Full Power
REFERENCE OUTPUT
Output Voltage
Temperature Coefficient
SWITCHING PERFORMANCE
Maximum Conversion Rate
Minimum Conversion Rate
Encode Pulsewidth High (t
EH
)
Encode Pulsewidth Low (t
EL
)
Aperture Delay (t
A
)
Aperture Uncertainty (Jitter)
Output Valid Time (t
V
)
3
Output Propagation Delay (t
PD
)
3
Output Rise Time (t
R
)
Output Fall Time (t
F
)
DIGITAL INPUT
Logic “1” Voltage
Logic “0” Voltage
Logic “1” Current
Logic “0” Current
Input Capacitance
DIGITAL OUTPUTS
Logic “1” Voltage
Logic “0” Voltage
Output Coding
POWER SUPPLY
V
CC
Supply Current (V
CC
= 5 V)
4
V
DD
Supply Current (V
DD
= 3.3 V)
4
Power Dissipation
4
Power Supply Sensitivity
5
(V
CC
= 5 V, V
DD
= 3.3 V, Differential Analog Input, ENCODE = 100 MSPS unless
otherwise noted.)
Test
Level
AD9071BR
Typ
10
Temp
Min
Max
Unit
Bits
25°C
Full
25°C
Full
25°C
25°C
Full
Full
I
VI
I
VI
I
I
VI
V
±
0.8
±
1.0
±
0.8
±
1.25
Guaranteed
±
1
±
2
150
+1.5/–1.0
+1.75/–1.0
±
1.5
±
1.75
±
4
±
8
LSB
LSB
LSB
LSB
% FS
% FS
ppm/°C
Full
Full
25°C
Full
Full
25°C
25°C
Full
25°C
Full
Full
Full
Full
25°C
25°C
25°C
25°C
Full
Full
Full
Full
Full
Full
Full
Full
25°C
Full
Full
V
V
I
VI
VI
V
I
VI
V
VI
V
VI
IV
IV
IV
V
V
VI
VI
V
V
VI
VI
VI
VI
V
VI
VI
15
±
512
–2.5
±
0.2
±
4
±
18
±
5
±
20
35
3
55
90
65
115
280
V
CC
– 2.5
130
V
CC
– 2.4
mV p-p
V
mV
mV
kΩ
pF
µA
µA
MHz
V
ppm/°C
MSPS
MSPS
ns
ns
ns
ps, rms
ns
ns
ns
ns
V
V
µA
µA
pF
V
V
V
CC
– 2.6
100
4.5
4.5
1.1
3.0
4.0
5.0
1.4
1.0
40
13
13
2.0
7.0
2.0
0.8
±
10
–500
3
V
DD
– 0.5
0.05
Offset Binary
Full
Full
Full
25°C
VI
VI
VI
I
85
7.5
450
0.002
115
14
620
0.010
mA
mA
mW
V/V
–2–
REV. C
AD9071
Parameter
DYNAMIC PERFORMANCE
6
Transient Response
Overvoltage Recovery Time
Signal-to-Noise Ratio (SNR)
(Without Harmonics)
f
IN
= 10.3 MHz
f
IN
= 41 MHz
Signal-to-Noise Ratio (SINAD)
(With Harmonics)
f
IN
= 10.3 MHz
f
IN
= 41 MHz
Effective Number of Bits
f
IN
= 10.3 MHz
f
IN
= 41 MHz
2nd Harmonic Distortion
f
IN
= 10.3 MHz
f
IN
= 41 MHz
3rd Harmonic Distortion
f
IN
= 10.3 MHz
f
IN
= 41 MHz
Two-Tone Intermodulation (IMD)
f
IN
= 10.3 MHz
f
IN
= 41 MHz
Temp
25°C
25°C
Test
Level
V
V
Min
AD9071BR
Typ
4
5
Max
Unit
ns
ns
25°C
Full
25°C
Full
I
V
I
V
54
53
56
55
55
54
dB
dB
dB
dB
25°C
Full
25°C
Full
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
I
V
I
V
I
I
I
I
I
I
V
V
54
52
56
55
54
53
9.2
8.8
75
66
75
65
70
60
dB
dB
dB
dB
Bits
Bits
dBc
dBc
dBc
dBc
dBc
dBc
8.8
8.5
63
60
65
57
NOTES
1
Differential and integral nonlinearity based on F
S
= 80 MSPS.
2
Gain error and gain temperature coefficient are based on the ADC only (with a fixed 2.5 V external reference).
3
t
V
and t
PD
are measured from the threshold crossing of the ENCODE input to the 50% levels of the digital outputs. The output ac load during test is 5 pF.
4
Power dissipation is measured under the following conditions: F
S
@ 100 MSPS, analog input is –1 dBFS at 10.3 MHz.
5
A change in input offset voltage with respect to a change in V
CC
.
6
SNR/harmonics based on an analog input voltage of –1.0 dBFS referenced to a 1.024 V full-scale input range.
Typical thermal impedance for the R style (SOIC) 28-lead package:
θ
JC
= 23°C/W,
θ
CA
= 48°C/W,
θ
JA
= 71°C/W.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS*
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . V
CC
to 0.0 V
Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . V
CC
to 0.0 V
VREF IN, VREF OUT . . . . . . . . . . . . . . . . . . . . V
CC
to 0.0 V
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . 10 mA
Operating Temperature . . . . . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature . . . . . . . . . . . . . . . . . . –65°C to +150°C
Maximum Junction Temperature . . . . . . . . . . . . . . . . . 150°C
Maximum Case Temperature . . . . . . . . . . . . . . . . . . . . 150°C
*Stresses
above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum ratings
for extended periods may effect device reliability.
EXPLANATION OF TEST LEVELS
Test Level
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.
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD9071 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
REV. C
–3–
AD9071
ORDERING GUIDE
Model
AD9071BR
AD9071/PCB
Temperature Range
–40°C to +85°C
25°C
Package Description
28-Lead Wide Body (SOIC)
Evaluation Board
Package Option
R-28
PIN FUNCTION DESCRIPTIONS
Pin No.
1, 7, 12, 21, 23
2, 8, 11
3
4
5, 6
9
10
13
14
15–19, 24–28
20, 22
Mnemonic
GND
V
CC
VREF OUT
VREF IN
DNC
AIN
AIN
ENCODE
OR
D9–D0
V
DD
Function
Ground
Analog Power Supply. Nominally 5.0 V. (Tie together to prevent a possible latch-up condition.)
Internal Reference Output (V
CC
– 2.5 V typical); Bypass with 0.1
µF
to V
CC
.
Reference Input for ADC (V
CC
– 2.5 V typical).
Do Not Connect
Analog Input – Complementary
Analog Input – True
Encode clock for ADC. (ADC Samples on Rising Edge of ENCODE.)
Out-of-Range Output. Goes HIGH when the converted sample is more positive than
3FF
H
or more negative than 000
H
(offset binary coding).
Digital outputs of ADC. D9 is the MSB. Data is offset binary.
Digital Output Power Supply. User selectable range from 3 V to 5 V.
PIN CONFIGURATION
Table I. Output Coding
GND 1
V
CC
2
VREF OUT
VREF IN
NC
NC
GND
3
4
5
6
7
28 D0
27 D1
26 D2
25 D3
24 D4
Code
1023
1023
1022
•
•
•
513
512
511
•
•
•
1
0
0
AIN–AIN
≥
0.512 V
0.511 V
0.510 V
•
•
•
0.001 V
0.000 V
–0.001 V
•
•
•
–0.511 V
–0.512 V
≤–0.513
V
Offset
Binary
11 1111 1111
11 1111 1111
11 1111 1110
•
•
•
10 0000 0001
10 0000 0000
01 1111 1111
•
•
•
00 0000 0001
00 0000 0000
00 0000 0000
OR
1
0
0
•
•
•
0
0
0
•
•
•
0
0
1
AD9071BR
23 GND
TOP VIEW 22 V
DD
(Not to Scale)
21 GND
V
CC
8
20 V
DD
AIN
9
AIN 10
V
CC
11
19 D5
18 D6
17 D7
16 D8
15 D9 (MSB)
GND 12
ENCODE 13
OR 14
NC = NO CONNECT
–4–
REV. C
AD9071
SAMPLE N–1
AIN
SAMPLE N
SAMPLE N+3
SAMPLE N+4
t
A
t
EH
ENCODE
SAMPLE N+1
SAMPLE N+2
t
EL
1/f
s
t
PD
D9–D0
DATA N–4
DATA N–3
DATA N–2
DATA N–1
DATA N
t
V
DATA N+1
Figure 1. Timing Diagram
V
CC
V
DD
AIN
AIN
D
9–0
, OR
Figure 2. Equivalent Analog Input Circuit
Figure 5. Equivalent Digital Output Circuit
V
CC
V
CC
VREF IN
VREF
OUT
Figure 3. Equivalent Reference Input Circuit
Figure 6. Equivalent Reference Output Circuit
V
CC
ENCODE
Figure 4. Equivalent Encode Input Circuit
REV. C
–5–
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