AD9012 Datasheet, PDF (1/8 Pages) Analog Devices – High Speed 8-Bit TTL A/D Converter

a
FEATURES
100 MSPS Encode Rate
Very Low Input Capacitance—16 pF
Low Power—1 W
TTL Compatible Outputs
MIL-STD-883 Compliant Versions Available
APPLICATIONS
Radar Guidance
Digital Oscilloscopes/ATE Equipment
Laser/Radar Warning Receivers
Digital Radio
Electronic Warfare (ECM, ECCM, ESM)
Communication/Signal Intelligence
GENERAL DESCRIPTION
The AD9012 is an 8-bit, ultrahigh speed, analog-to-digital
converter. The AD9012 is fabricated in an advanced bipolar
process that allows operation at sampling rates up to one hun-
dred megasamples/second. Functionally, the AD9012 is com-
prised of 256 parallel comparator stages whose outputs are
decoded to drive the TTL compatible output latches.
The 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 AD9012 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 AD9012 is available in two grades: one with 0.5 LSB linear-
ity and one with 0.75 LSB linearity. Both versions are offered in
High Speed 8-Bit
TTL A/D Converter
AD9012
FUNCTIONAL BLOCK DIAGRAM
OVERFLOW
INHIBIT
ANALOG IN
R
؉V_REF
R
R
R/2
REF_MID
R/2
R
R
؊V_REF
ENCODE
AD9012
256
OVERFLOW
255
D₈ (MSB)
D
E
D₇
C
O
128
D
I
N
L
A
T
G
C
D₆
D₅
L
H
127
O
D₄
G
I
C
D₃
2
D₂
1
D₁ (LSB)
GND HYSTERESIS ؊V_S ؉V_S
an industrial grade, –25°C to +85°C, packaged in a 28-lead DIP
and a 28-lead JLCC. The military temperature range devices,
–55°C to +125°C, are available in ceramic DIP and LCC pack-
ages and are compliant to MIL-STD-883 Class B.
The AD9012 is available in versions compliant with MIL-STD-
883. Refer to the Analog Devices Military Products Databook
or current AD9012/883B data sheet for detailed specifications.
REV. D
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: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone]
© Analog Devices, Inc., 1999