ACD2204
CATV/TV/Video Downconverter
with Dual Synthesizer
PRELIMINARY DATA SHEET - Rev 1.0
FEATURES
•
•
•
•
•
•
•
•
•
•
Integrated Downconverter
Integrated Dual Synthesizer
256 QAM Compatibility
Single +5 V Power Supply Operation
Low Noise Figure: 8 dB
High Conversion Gain: 31 dB
Low Distortion: -53 dBc
Three-Wire Interface
Small Size
-40
°C
to +85
°C
APPLICATIONS
•
•
•
•
•
Set Top Boxes
CATV Video Tuners
Digital TV Tuners
CATV Data Tuners
Cable Modems
S8 Package
28 Pin SSOP
PRODUCT DESCRIPTION
The ACD2204 uses both GaAs and Si technology
to provide the downconverter and dual synthesizer
functions in a double conversion tuner gain block,
local oscillator, balanced mixer, IF Amplifier, and
dual synthesizer. The specifications meet the
requirements of CATV/TV/Video and Cable Modem
Data applications. The ACD2204 is supplied in a 28
lead SSOP package and requires a single +5 V
supply voltage. The IC is well suited for applications
where small size, low cost, low auxiliary parts count,
and no-compromise performance is important. It
provides for cost reduction by lowering the
component and packaged IC count and decreasing
the amount of labor-intensive production alignment
steps, while significantly improving performance
and reliability.
RF
RF2: 64/65
Prescaler
18 Bit RF2
N C ounter
RF2
Phase
Detector
RF 2
Charge
Pump
D
CP
D
RF
IN
+
RF
IN
-
Low Noise
VGA
V
IF
+IF
OUT-
REF
IN
15 Bit RF2
R C ounter
V
IF
+IF
OUT+
Mixer
REF
OU T
Oscillato r
15 Bit RF1
R C ounter
Phase Splitter
RF
U
RF1: 64/65
Prescaler
18 Bit RF1
N C ounter
RF1
Phase
Detector
RF1
Charge
Pump
CP
U
T
CKT
OSC
OUT
Clock
Data
Enabl e
22 Bi t
Data Registar
Figure 1: Downconverter Block Diagram
04/2003
Figure 2: Dual Synthesizer Block Diagram
ANADIGICS [ ANADIGICS, INC ]
