ACD2206 Datasheet, PDF (1/20 Pages) ANADIGICS, Inc – CATV/TV/VIDEO DOWNCONVERTER WITH DUAL SYNTHESIZER

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
ACD2206
CATV/TV/Video Downconverter
with Dual Synthesizer
PRELIMINARY DATA SHEET - Rev 1.0
S8 Package
28 Pin SSOP
PRODUCT DESCRIPTION
The ACD2206 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 ACD2206 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.
RFIN+
RFIN-
Low Noise
VGA
Mixer
VIF+IFOUT-
VIF+IFOUT+
Phase Splitter
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
TCKT
OSC OUT
Figure 1: Downconverter Block Diagram
Clock
Data
Enable
22 Bit
Data Registar
Figure 2: Dual Synthesizer Block Diagram
10/2003