Two Matched ADCs on Single Chip
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
Direct Broadcast Satellite (DBS) Receivers
Dual 6-Bit, 60 MSPS
Monolithic A/D Converter
FUNCTIONAL BLOCK DIAGRAM
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.
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.
28 D5A (MSB)
23 D0A (LSB)
GND 7 TOP VIEW 22 GND
+VS 8 (Not to Scale) 21 +VS
20 D5B (MSB)
REF A 10
REF B 12
15 D0B (LSB)
NC = NO CONNECT
REF A 3
REF B 5
NC 7 TOP VIEW 22 ENCODE
(LSB) D0B 8 (Not to Scale) 21 D5A (MSB)
(MSB) D5B 13
16 D0A (LSB)
NC = NO CONNECT
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© Analog Devices, Inc., 2000