參數(shù)資料
型號(hào)： HSP50214VC
廠商： INTERSIL CORP
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Programmable Downconverter
中文描述： SPECIALTY TELECOM CIRCUIT, PQFP120
封裝： MQFP-120
文件頁數(shù)： 1/54頁
文件大?。?/td> 395K
代理商： HSP50214VC
1
[ /Title
(HSP5
0214)
/Sub-
ject
(Pro-
gram-
mable
Down-
con-
verter)
/Autho
r ()
/Key-
words
(Inter-
sil
Semi-
con-
ductor,
Down-
con-
verter,
Down
Con-
verter,
Pro-
gram-
mable
Down-
con-
verter,
DSP,
AMPS,
TDMA
,
North
Ameri-
can
February 2000
HSP50214
Programmable Downconverter
Features
Up to 52 MSPS Front-End Processing Rates (CLKIN)
and 35 MSPS Back-End Processing Rates (PROCCLK)
Clocks May Be Asynchronous
Processing Capable of >100dB SFDR8-
Up to 255-Tap Programmable FIR
Overall Decimation Factor Ranging from 4 to 16384
Output Samples Rates to
8.2 MSP8-S with Output
Bandwidths to
625kHz Lowpass
32-Bit Programmable NCO for Channel Selection and
Carrier Tracking
Digital Re-Sampling Filter for Symbol Tracking Loops
and Incommensurate Sample-to-Output Clock Ratios
Digital AGC with Programmable Limits and Sle8- Rate
to Optimize Output Signal Resolution; Fixed or Auto
Gain Adjust
Serial, Parallel, and FIFO 16-Bit Output Modes
Cartesian to Polar Converter and Frequency Discrimi-
nator for AFC Loops and Demodulation of AM, FM,
FSK, and DPSK
Input Level Detector for External I.F. AGC Support
Applications
Single Channel Digital Software Radio Receivers
Base Station Rx’s: AMPS, NA TDMA, GSM, and CDMA
Compatible with HSP50210 Digital Costas Loop for
PSK Reception
Evaluation Platform Available
Description
The HSP50214 Programmable Downconverter converts
digitized IF data into filtered baseband data which can be
processed by a standard DSP microprocessor. The
Programmable Downconverter (PDC) performs down
conversion, decimation, narrowband low pass filtering, gain
scaling, re-sampling, and Cartesian to Polar coordinate
conversion.
The 14-bit sampled IF input is down converted to baseband
by digital mixers and a quadrature NCO, as shown in the
Block Diagram. A decimating (4 to 32) fifth order Cascaded
Integrator-Comb (CIC) filter can be applied to the data
before it is processed by up to 5 decimate-by-2 halfband fil-
ters. The halfband filters are followed by a 255-tap program-
mable FIR filter. The output data from the programmable FIR
filter is scaled by a digital AGC before being re-sampled in a
polyphase FIR filter. The output section can provide seven
types of data: Cartesian (I, Q), polar (R,
θ
), filtered frequency
(d
θ/
dt), timing error (TE), and AGC level in either parallel or
serial format.
Block Diagram
Ordering Information
PART
NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG. NO.
HSP50214VC
0 to 70
120 Ld MQFP
Q120.28x28
HSP50214VI
-40 to 85
120 Ld MQFP
Q120.28x28
HALFBAND
FILTERS
POLYPHASE
FIR AND
I
S
LEVEL DETECT
CARRIER
NCO
5
TH
CARTESIAN
TO
POLAR
COORDINATE
CONVERTER
O
DISCRIMINATOR
AGC LOOP FILTER
MAG.
PHASE
RE-SAMPLING
NCO
I SYMBOL
Q SYMBOL
FREQ
AGC
TIMING ERROR
IN(13:0)
REFCLK
SEROUTA
SEROUTB
AOUT(15:0)
BOUT(15:0)
CONTROL
C(7:0)
MICROPROCESSOR
READ/WRITE
GAIN
ADJ
(2:0)
H
F
FILTER
CIC
ORDER
H
F
HALFBAND
FILTERS
POLYPHASE
FIR AND
COF
SOF
CLKIN
PROCCLK
2
F
2
F
5
TH
FILTER
CIC
ORDER
File Number
4266.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Copyright
Intersil Corporation 2000
HSP50214B
POSOBSOLETE PRODUCT
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