a
Dual 8-Bit, 60 MSPS A/D Converter
AD9059
FEATURES
FUNCTIO NAL BLO CK D IAGRAM
Dual 8-Bit ADCs on a Single Chip
Low Pow er: 400 m W Typical
On-Chip +2.5 V Reference and T/ Hs
1 V p-p Analog Input Range
Single +5 V Supply Operation
+5 V or +3 V Logic Interface
120 MHz Analog Bandw idth
Pow er-Dow n Mode: < 12 m W
V
PWRDN
V
D
DD
AD9059
8
AINA
VREF
D7A–D0A
T/H
ADC
A
ENCODE
+2.5V
APPLICATIONS
8
AINB
T/H
ADC
D7B–D0B
Digital Com m unications (QAM Dem odulators)
RGB & YC/ Com posite Video Processing
Digital Data Storage Read Channels
Medical Im aging
B
GND
Digital Instrum entation
P RO D UCT D ESCRIP TIO N
P IN CO NFIGURATIO N
T he AD9059 is a dual 8-bit monolithic analog-to-digital con-
verter optimized for low cost, low power, small size, and ease of
use. With a 60 MSPS encode rate capability and full-power
analog bandwidth of 120 MHz typical, the component is ideal
for applications requiring multiple ADCs with excellent dy-
namic performance.
1
2
28
27
26
25
AINA
VREF
AINB
GND
3
PWRDN
ENCODE
4
V
D
V
D
5
24 GND
GND
T o minimize system cost and power dissipation, the AD9059
includes an internal +2.5 V reference and dual track-and-hold
circuits. T he ADC requires only a +5 V power supply and an
encode clock. No external reference or driver components are
required for many applications.
AD9059
TOP VIEW
(Not to Scale)
V
6
23
22
21
20
19
18
17
16
V
DD
DD
D7A (MSB)
D6A
7
D7B (MSB)
D6B
8
D5A
9
D5B
D4A
10
11
12
13
14
D4B
T he AD9059’s single encode input is T T L/CMOS compatible
and simultaneously controls both internal ADC channels. T he
parallel 8-bit digital outputs can be operated from +5 V or +3 V
supplies. A power-down function may be exercised to bring to-
tal consumption to < 12 mW when ADC data is not required
for lengthy periods of time. In power-down mode the digital
outputs are driven to a high impedance state.
D3A
D3B
D2A
D2B
D1A
D1B
D0A (LSB)
15 D0B (LSB)
Fabricated on an advanced BiCMOS process, the AD9059
is available in a space saving 28-lead surface mount plastic
package (28 SSOP) and is specified over the industrial
(–40°C to +85°C) temperature range.
Customers desiring single channel digitization may consider the
AD9057, a single 8-bit, 60 MSPS monolithic based on the
AD9059 ADC core. T he AD9057 is available in a 20-lead sur-
face mount plastic package (20 SSOP) and is specified over the
industrial temperature range.
REV. 0
Inform ation furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assum ed by Analog Devices for its
use, nor for any infringem ents of patents or other rights of third parties
which m ay result from its use. No license is granted by im plication or
otherwise under any patent or patent rights of Analog Devices.
© Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.
Tel: 617/ 329-4700 Fax: 617/ 326-8703