Dual 6-Bit, 60 MSPS
Monolithic A/D Converter
a
AD9066
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Two Matched ADCs on Single Chip
CMOS-Compatible I/O
Low-Power (400 mW) Dissipation
Single +5 V Supply
+V
S
AD9066
VT
On-Chip Voltage Reference
Self-Biased for AC-Coupled Inputs
28-Lead SOIC and SSOP Packages
6-BIT
INA
D0A-D5A
D0B-D5B
DAC
REF A
ENCODE
APPLICATIONS
6-BIT
DAC
Direct Broadcast Satellite (DBS) Receivers
QAM Demodulators
Wireless LANs
INB
REF B
VB
VSAT Receivers
PRODUCT DESCRIPTION
PIN CONFIGURATIONS
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.
ENCODE
1
2
3
4
5
6
7
8
9
28
27
26
25
24
23
22
21
20
19
18
17
16
15
D5A (MSB)
+V
S
D4A
GND
GND
D3A
D2A
+V
S
D1A
AD9066
(JR/AR)
INA
D0A (LSB)
GND
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.
GND
TOP VIEW
(Not to Scale)
+V
S
+V
S
VT
D5B (MSB)
D4B
REF A 10
INB 11
D3B
REF B 12
VB 13
D2B
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.
D1B
NC 14
D0B (LSB)
NC = NO CONNECT
+V
1
2
28
27
26
GND
INA
S
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.
VT
REF A
INB
3
+V
S
4
25 GND
REF B
5
24
23
22
21
GND
AD9066
(ARS)
6
+V
S
VB
NC
7
ENCODE
TOP VIEW
(Not to Scale)
8
(LSB) D0B
D1B
D5A (MSB)
9
20 D4A
10
11
D2B
19
18
D3A
D2A
D3B
D4B 12
17 D1A
(MSB) D5B 13
16 D0A (LSB)
+V
14
15
GND
S
NC = NO CONNECT
REV. A
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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.
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© Analog Devices, Inc., 2000