Analog Devices AD9060 b Datasheet

a
FEATURES Monolithic 10-Bit/75 MSPS Converter ECL Outputs Bipolar (1.75 V) Analog Input 57 dB SNR @ 2.3 MHz Input Low (45 pF) Input Capacitance
APPLICATIONS Digital Oscilloscopes Medical Imaging Professional Video Radar Warning/Guidance Systems Infrared Systems

GENERAL DESCRIPTION

The AD9060 A/D converter is a 10-bit monolithic converter capable of word rates of 75 MSPS and above. Innovative architecture using 512 input comparators instead of the tradi­tional 1024 required by other flash converters reduces input capacitance and improves linearity.
Inputs and outputs are ECL compatible, which makes the AD9060 the recommended choice for systems with conversion rates >30 MSPS to minimize system noise. An overflow bit is provided to indicate analog input signals greater than +V
Voltage sense lines are provided to ensure accurate driving of the ± V
voltages applied to the units. Quarter point taps on
REF
the resistor ladder help optimize the integral linearity of the unit.
The AD9060 is available in a 68-lead ceramic leaded (gull wing) chip carrier package 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.
SENSE
.
A
+V
REF
+V
SENSE
3/4
REF
1/2
REF
1/4
REF
–V
SENSE
–V
REF
ENCODE
ENCODE
A/D Converter
AD9060

FUNCTIONAL BLOCK DIAGRAM

MSB
LSBs
INVERT
INVERT
61 59
R/2
R/2
R/2
R/2
R/2
R/2
R/2
R/2
R
R
R
R
R
R
R
R
OVERFLOW
512
385
384
257
256
129
128
2
1
AD9060
C O M P A R A
OVERFLOW OVERFLOW
T O R
L A T C H E S
1024
D E C O D E
L O G
I
C
51
OVERFLOW
(MSB)
D
50
9
49
D
8
48
D
7
L
47
D
6
A
46
T
D
5
C
23
D
H
10
22
D
21
D
20
D
19
D0 (LSB)
4
3
2
1
IN
63
57
56
REV. B
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.
+V
–V
S
GND
S
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.
AD9060–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
(+VS = +5 V; –VS = –5.2 V; ⴞV
Test AD9060JZ AD9060KZ
Parameter Temp Level Min Typ Max Min Typ Max Unit
RESOLUTION 10 10 Bits
DC ACCURACY
1
Differential Nonlinearity 25°CI 1.0 1.25 0.75 1.0 LSB
Full VI 1.5 1.25 LSB
Integral Nonlinearity 25°CI 1.25 2.0 1.0 1.5 LSB
Full VI 2.5 2.0 LSB
No Missing Codes Full VI Guaranteed
ANALOG INPUT
Input Bias Current
2
25°CI 0.4 1.0 0.4 1.0 mA Full VI 2.0 2.0 mA
Input Resistance 25°CI 2.0 7.0 2.0 7.0 k Input Capacitance
2
25°CV 45 45 pF
Analog Bandwidth 25°CV 175 175 MHz
REFERENCE INPUT
Reference Ladder Resistance 25°CI 22 37 56 22 37 56
Full VI 14 66 14 66
Ladder Tempco Full V 0.1 0.1 Ω/°C Reference Ladder Offset
Top of Ladder 25°CI 45 90 45 90 mV
Full VI 90 90 mV
Bottom of Ladder 25°CI 45 90 45 90 mV
Full VI 90 90 mV
Offset Drift Coefficient Full V 50 50 µV/°C
SWITCHING PERFORMANCE
Conversion Rate 25°CI 75 75 MSPS Aperture Delay (t Aperture Uncertainty (Jitter) 25°CV 55ps, rms Output Delay (t
)25°CV 1 1 ns
A
3
OD
)
25°CI 2 4 9 2 4 9 ns Output Rise Time 25°CI 1 3 1 3 ns Output Fall Time 25°CI 1 3 1 3 ns Output Time Slew
3
25°CI 1.5 3 1.5 3 ns
DYNAMIC PERFORMANCE
Transient Response 25°CV 10 10 ns Overvoltage Recovery Time 25°CV 10 10 ns Effective Number of Bits (ENOB)
= 2.3 MHz 25°CI 8.7 9.1 8.7 9.1 Bits
f
IN
= 10.3 MHz 25°CIV 8.0 8.6 8.0 8.6 Bits
f
IN
f
= 29.3 MHz 25°CIV 7.0 7.4 7.0 7.4 Bits
IN
Signal-to-Noise Ratio
4
fIN = 2.3 MHz 25°CI 54 56 54 56 dB f
= 10.3 MHz 25°CI 51 54 51 54 dB
IN
fIN = 29.3 MHz 25°CI 44 47 44 47 dB
= 1.75 V; ENCODE = 60 MSPS, unless otherwise noted.)
SENSE
1
–2–
REV. B
AD9060
Test AD9060JZ AD9060KZ
Parameter Temp Level Min Typ Max Min Typ Max Unit
DYNAMIC PERFORMANCE
(continued) Signal-to-Noise Ratio
(Without Harmonics)
= 2.3 MHz 25°CI 54 56 54 58 dB
f
IN
= 10.3 MHz 25°CI 51 55 51 55 dB
f
IN
f
= 29.3 MHz 25°CI 46 48 46 48 dB
IN
Harmonic Distortion
= 2.3 MHz 25°CI 61 65 61 65 dBc
f
IN
f
= 10.3 MHz 25°CI 55 58 55 58 dBc
IN
= 29.3 MHz 25°CI 47 50 47 50 dBc
f
IN
Two-Tone Intermodulation
Distortion Rejection
Differential Phase 25°CV 0.5 0.5 Degrees Differential Gain 25°CV 1 1 %
ENCODE INPUT
Logic 1 Voltage Full VI –1.1 –1.1 V Logic 0 Voltage Full VI –1.5 –1.5 V Logic 1 Current Full VI 150 300 150 300 µA Logic 0 Current Full VI 150 300 150 300 µA Input Capacitance 25°CV 5 5 pF Pulsewidth (High) 25°CI 6 6 ns Pulsewidth (Low) 25°CI 6 6 ns
DIGITAL OUTPUTS
Logic 1 Voltage Full VI –1.1 –1.1 V Logic 0 Voltage Full VI –1.5 –1.5 V
POWER SUPPLY
+VS Supply Current 25°CVI 420 500 420 500 mA
Supply Current 25°CVI 150 180 150 180 mA
–V
S
Power Dissipation 25°CVI 2.8 3.3 2.8 3.3 W
Power Supply Rejection
Ratio (PSRR)
NOTES
1
3/4
, 1/2
REF
CL < 4 pF. Accuracy of the overflow comparator is not tested and not included in linearity specifications.
2
Measured with AIN = +V
3
Output delay measured as worst-case time from 50% point of the rising edge of ENCODE to 50% point of the slowest rising or falling edge of D0–D9. Output skew measured as worst-case difference in output delay among D0–D9.
4
RMS signal to rms noise with analog input signal 1 dB below full scale at specified frequency.
5
Intermodulation measured with analog input frequencies of 2.3 MHz and 3.0 MHz at 7 dB below full scale.
6
Measured as the ratio of the worst-case change in transition voltage of a single comparator for a 5% change in + VS or –VS.
Specifications subject to change without notice.
, and 1/4
REF
4
5
25°CV 70 70 dBc
Full VI 500 500 mA
Full VI 190 190 mA
Full VI 3.5 3.5 W
6
reference ladder taps are driven from dc sources at +0.875 V, 0 V, and –0.875 V, respectively. Outputs terminated through 100 to –2.0 V;
REF
SENSE
Full VI 6 10 6 10 mV/V
REV. B
–3–
AD9060
ABSOLUTE MAXIMUM RATINGS
1
+VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .–6 V
–V
S
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –2 V to +2 V
IN
, –V
, 3/4
, 1/2
+V +V
REF
REF
REF
to –V
REF
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0 V
REF
REF
, 1/4
ENCODE, ENCODE . . . . . . . . . . . . . . . . . . . . . . . 0 V to –V
3/4
, 1/2
REF
REF
, 1/4
Current . . . . . . . . . . . . . . . . . . . ± 10 mA
REF
. . . . . . . . . –2 V to +2 V
REF
S
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Operating Temperature
AD9060JZ/AD9060KZ . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage Temperature . . . . . . . . . . . . . . . . . . –65°C to +150°C
Maximum Junction Temperature
2
. . . . . . . . . . . . . . . . . 150°C
Lead Soldering Temp (10 sec) . . . . . . . . . . . . . . . . . . . . 300°C
NOTES
1
Absolute 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.
2
Typical thermal impedances (part soldered onto board): 68-lead ceramic chip carrier: θJC = 1°C/W; θJA = 17°C/W (no air flow); θJA = 15°C/W (air flow = 500 LFM).
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. All devices are 100% production tested at 25°C. 100%
production tested at temperature extremes for extended
temperature devices; sample tested at temperature extremes
for commercial/industrial devices.

MECHANICAL INFORMATION (DIE LAYOUT)

Die Dimensions . . . . . . . . . 206 mils × 140 mils × 15 (±2) mils
Pad Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 4 mils × 4 mils
Metallization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gold
Backing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . None
Substrate Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –V
Passivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nitride

DIE LAYOUT

S
S
S
+V
+VS+V
GND
–V
S
REF
+V
1/2
GND
GND
GND
GND
S
+V
GND
–VS–V
GND D
5
D
6
D
7
D
8
D
9
OVERFLOW GND GND –V
S
NC –V
REF
–V
SENSE
1/4
REF
LSB INVERT
NC
MSB INVERT
S
S
+V
–V
GND
D
4
D
3
D
2
D
1
(LSB) D
0
GND GND
–V
S
+V
S
ENCODE
ENCODE
+V
REF
+V
SENSE
AINA
NC = NO CONNECT
S
S
+V
GND
GND
–VS–VSGND
S
S
GND
GND
S
+V
–V
IN
REF
+V
3/4
S

ORDERING GUIDE

Model Temperature Range Package Description Package Options
AD9060JZ 0°C to 70°C Leaded Chip Carrier Z-68D AD9060KZ 0°C to 70°C Leaded Chip Carrier Z-68D AD9060/PCB 0°C to 70°C Evaluation Board
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 AD9060 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.
–4–
REV. B
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