FEATURES
Monolithic 10-Bit/75 MSPS Converter
ECL Outputs
Bipolar (ⴞ1.75 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
OVERFLOWOVERFLOW
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.
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°CV7070dBc
FullVI500500mA
FullVI190190mA
FullVI3.53.5W
6
reference ladder taps are driven from dc sources at +0.875 V, 0 V, and –0.875 V, respectively. Outputs terminated through 100 Ω to –2.0 V;
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.
AD9060JZ0°C to 70°CLeaded Chip CarrierZ-68D
AD9060KZ0°C to 70°CLeaded Chip CarrierZ-68D
AD9060/PCB0°C to 70°CEvaluation 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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