a
FEATURES
Two Matched ADCs on Single Chip
CMOS-Compatible I/O
Low-Power (400 mW) Dissipation
Single +5 V Supply
On-Chip Voltage Reference
Self-Biased for AC-Coupled Inputs
28-Lead SOIC and SSOP Packages
APPLICATIONS
Direct Broadcast Satellite (DBS) Receivers
QAM Demodulators
Wireless LANs
VSAT Receivers
Dual 6-Bit, 60 MSPS
Monolithic A/D Converter
AD9066
FUNCTIONAL BLOCK DIAGRAM
+V
S
AD9066
VT
INA
REF A
ENCODE
INB
REF B
VB
6-BIT
DAC
D0B-D5B
6-BIT
DAC
D0A-D5A
PRODUCT DESCRIPTION
PIN CONFIGURATIONS
ENCODE
1
+V
S 2
GND
3
GND
4
+V
S 5
INA
6
GND
7
+V
S
28
D5A (MSB)
27
D4A
26
D3A
25
D2A
24
D1A
The AD9066 is a dual 6-bit ADC that has been optimized for
low-cost in-phase and quadrature (I and Q) demodulators.
Primary applications include digital direct broadcast satellite
applications where broadband quadrature phase shift keying
(QPSK) modulation is used. In these receivers the recovered signal
is separated into I and Q vector components and digitized.
To reduce total system cost and power dissipation, the AD9066
provides an internal voltage reference and operates from a
single +5 volt power supply. Digital outputs are CMOS com-
patible and rated to 60 MSPS conversion rates. The digital
input (ENCODE) utilizes a CMOS input stage with a TTL
compatible (1.4 V) threshold.
The AD9066 is housed in a 28-lead SOIC and a 28-lead SSOP
package and is available in two temperature grades. The
AD9066JR is rated for operation over the 0°C to 70°C commer-
cial temperature range. The AD9066AR/ARS is rated for the
–40°C to +85°C industrial temperature range.
The internal voltage reference insures that the analog input is
biased to midscale with low offset when driven from an ac-
coupled source. In dc-coupled applications, the midscale voltage
reference can be used to control external biasing amplifiers to
minimize offsets due to variations in temperature or supply voltage.
AD9066
(JR/AR)
TOP VIEW
23
D0A (LSB)
22
GND
8
(Not to Scale)
21
+V
S
20
D5B (MSB)
19
D4B
18
D3B
17
D2B
16
D1B
15
D0B (LSB)
VT
9
REF A
10
INB
11
REF B
12
VB
13
NC
14
NC = NO CONNECT
+V
S 1
VT
2
REF A
3
INB
4
REF B
5
VB
6
NC
7
28
GND
27
INA
26
+V
S
25
GND
24
GND
AD9066
(ARS)
23
+V
S
TOP VIEW
22
ENCODE
(Not to Scale)
21
D5A (MSB)
(LSB) D0B
8
D1B
9
D2B
10
D3B
11
D4B
12
(MSB) D5B
13
+V
S 14
20
D4A
19
D3A
18
D2A
17
D1A
16
D0A (LSB)
15
GND
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.
NC = NO CONNECT
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000
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