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ACD2203 Datasheet, PDF (1/24 Pages) ANADIGICS, Inc – CATV/TV/Video Downconverter with Dual Synthesizer | |||
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FEATURES
⢠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
ACD2203
CATV/TV/Video Downconverter
with Dual Synthesizer
PRELIMINARY DATA SHEET - Rev 1.3
APPLICATIONS
⢠Set Top Boxes
⢠CATV Video Tuners
⢠Digital TV Tuners
⢠CATV Data Tuners
⢠Cable Modems
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.
S8 Package
28 Pin SSOP
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.
RFIN+
RFIN-
Low Noise
VGA
Mixer
VIF+IFOUT+
VIF+IFOUT-
Phase Splitter
TCKT
OSC OUT
Figure 1: Downconverter Block Diagram
RFD
RF2: 64/65
Prescaler
REFIN
REFOUT
Oscillator
RFU
RF1: 64/65
Prescaler
18 Bit RF2
N Counter
15 Bit RF2
R Counter
15 Bit RF1
R Counter
18 Bit RF1
N Counter
RF2
Phase
Detector
RF2
Charge
Pump
CPD
RF1
Phase
Detector
RF1
Charge
Pump
CPU
Clock
Data
AS
2 Bit
A/D
24 Bit
Data Register
Figure 2: Dual Synthesizer Block Diagram
12/2003
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