ACD2204 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
ACD2204
CATV/TV/Video Downconverter
with Dual Synthesizer
PRELIMINARY DATA SHEET - Rev 1.0
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 IN+
RF IN-
Low Noise
VGA
Mixer
V IF +IF OUT-
V IF +IF OUT+
Phase Splitter
RF D
RF2: 64/65
Prescaler
REF IN
REF OU T
Oscillato r
RF U
RF1: 64/65
Prescaler
18 Bit RF2
N C ounter
15 Bit RF2
R C ounter
15 Bit RF1
R C ounter
18 Bit RF1
N C ounter
RF2
Phase
Detector
RF 2
Charge
Pump
CP D
RF1
Phase
Detector
RF1
Charge
Pump
CP U
T CKT
OSC OUT
Figure 1: Downconverter Block Diagram
Clock
Data
Enabl e
22 Bi t
Data Registar
Figure 2: Dual Synthesizer Block Diagram
04/2003