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
MIL-STD-883 Compliant Versions Available
APPLICATIONS
Digital Oscilloscopes
Medical Imaging
Professional Video
Radar Warning/Guidance Systems
Infrared Systems
10-Bit 75 MSPS
A/D Converter
AD9060
FUNCTIONAL BLOCK DIAGRAM
MSB LSBS
INVERT INVERT
61 59
ANALOG IN
8
9
OVERFLOW
+V REF 12
+V SENSE 11
R/2
512
C
R
O
385
M
R/2
3/4 REF 7
P
R/2
384
51 OVERFLOW
A
R
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 +VSENSE.
R
R
257
R/2
The AD9060 A/D converter is available in versions compliant
with MIL-STD-883. Refer to the Analog Devices Military Products Databook or current AD9060/883B data sheet for detailed
specifications.
T
R/2
OVERFLOW
49 D8
L
OVERFLOW
256
R
R
L
O
G
I
C
1024
L
R
10
A
47 D6
46 D
5
C
23 D4
22 D3
H
21 D2
20 D1
129
A
19 D0 (LSB)
R/2
1/4 REF 63
48 D7
T
O
1/2 REF 1
T
R/2
Voltage sense lines are provided to ensure 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 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.
D
E
C
O
D
E
A
50 D9 (MSB)
128
C
R
H
R
E
2
S
R
1
R/2
–V SENSE 57
–V REF 56
ENCODE 14
ENCODE 13
–VS
+V S
GROUND
REV. A
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
which 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: 617/329-4700
World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 1997
