ACD2203
CATV/TV/Video Downconverter
with Dual Synthesizer
PRELIMINARY DATA SHEET - Rev 1.3
FEATURES
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Integrated Downconverter
Integrated Dual Synthesizer
256 QAM Compatibility
Single +5 V Power Supply Operation
Low Power Consumption: <0.6 W
Low Noise Figure: 8 dB
High Conversion Gain: 10 dB
Low Distortion: -53 dBc
Two-Wire Interface
Small Size
-40 °C to +85 °C
APPLICATIONS
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Set Top Boxes
CATV Video Tuners
Digital TV Tuners
CATV Data Tuners
Cable Modems
S8 Package
28 Pin SSOP
PRODUCT DESCRIPTION
The ACD2203 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 and dual synthesizer.
The specifications meet the requirements of
CATV/TV/Video and Cable Modem Data applications.
The ACD2203 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 a 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
D
RF2: 64/65
Prescaler
18 Bit RF2
N Counter
RF2
Phase
Detector
RF2
Charge
Pump
CP
D
RF
IN
+
RF
IN
-
Low Noise
VGA
V
IF
+IF
OUT+
REF
IN
REF
OUT
Oscillator
15 Bit RF2
R Counter
V
IF
+IF
OUT-
Mixer
RF1: 64/65
Prescaler
15 Bit RF1
R Counter
RF
U
18 Bit RF1
N Counter
RF1
Phase
Detector
RF1
Charge
Pump
CP
U
Phase Splitter
T
CKT
OSC
OUT
Clock
Data
AS
2 Bit
A/D
24 Bit
Data Register
Figure 1: Downconverter Block Diagram
12/2003
Figure 2: Dual Synthesizer Block Diagram
ANADIGICS [ ANADIGICS, INC ]
