4-Channel, 80 MSPS WCDMA
Receive Signal Processor (RSP)
AD6635
FEATURES
Programmable Attenuator Control for Clip Prevention and
External Gain Ranging via Level Indicator
3.3 V I/O, 2.5 V CMOS Core
Four 80 MSPS Wideband Inputs (14 Linear Bits Plus 3 RSSI)
4 Real Input Ports/2 Complex Input Ports
Processes 4 Wideband Channels (UMTS or cdma2000
1x) or 8 GSM/EDGE, IS136 Channels
8 Independent Digital Receivers in a Single Package
Four 16-Bit Parallel Output Ports and Four 8-Bit Link Ports
4 Programmable Digital AGC Loops with 96 dB Range
Digital Resampling for Noninteger Decimation Rates
Programmable Decimating FIR Filters
User Configurable Built-in Self Test (BIST) Capability
APPLICATIONS
Multicarrier, Multimode Digital Receivers
GSM, IS136, EDGE, PHS, IS95, UMTS, cdma2000
Micro and Pico Cell Systems, Software Radios
Wireless Local Loop
Smart Antenna Systems
In-Building Wireless Telephony
4 Interpolating Half-Band Filters
Flexible Control for Multicarrier and Phased Array
FUNCTIONAL BLOCK DIAGRAM
RAM
TO A AND B
OUTPUT
PORTS
rCIC2
PORT A
CIC5
CIC5
CIC5
CIC5
COEFFICIENT
FILTER
RESAMPLER
RCF OUTPUTS
LINK PORT
OR
PARALLEL
PORT
INA[13:0]
EXPA[2:0]
CHANNELS 0,1,2,3
CHANNEL 0
TO A AND B
OUTPUT
PORTS
NCO
NCO
NCO
I
RAM
N
P
U
T
IENA
rCIC2
RESAMPLER
COEFFICIENT
FILTER
CH A INTERPOLATING
HALF-BAND FILTER,
INTERLEAVING & AGC
LIA-A
LIA-B
CHANNEL 1
CH A AND B
OUTPUT MUX
CIRCUITRY
M
A
T
R
I
TO A AND B
OUTPUT
PORTS
RAM
rCIC2
RESAMPLER
COEFFICIENT
FILTER
INB[13:0]
EXPB[2:0]
CHANNEL 2
CH B INTERPOLATING
HALF-BAND FILTER,
INTERLEAVING & AGC
PORT B
X
LINK PORT
OR
PARALLEL
PORT
IENB
RAM
rCIC2
RESAMPLER
TO A AND B
OUTPUT
PORTS
COEFFICIENT
FILTER
RCF OUTPUTS
CHANNELS 0,1,2,3
LIB-A
LIB-B
CHANNEL 3
NCO
NCO
PORT C
TO C AND D
OUTPUT
PORTS
RAM
rCIC2
CIC5
CIC5
CIC5
CIC5
COEFFICIENT
FILTER
8-BIT DSP
LINK PORT
RESAMPLER
RCF OUTPUTS
INC[13:0]
CHANNELS 4,5,6,7
CHANNEL 4
OR
EXPC[2:0]
TO C AND D
OUTPUT
PORTS
I
16-BIT
PARALLEL
OUTPUT
RAM
IENC
N
P
U
T
rCIC2
RESAMPLER
COEFFICIENT
FILTER
CH C INTERPOLATING
HALF-BAND FILTER,
INTERLEAVING & AGC
LIB-A
LIB-B
CHANNEL 5
CH C AND D
OUTPUT MUX
CIRCUITRY
NCO
NCO
NCO
M
A
T
R
I
TO C AND D
OUTPUT
PORTS
RAM
rCIC2
RESAMPLER
COEFFICIENT
FILTER
PORT D
IND[13:0]
EXPD[2:0]
CH D INTERPOLATING
HALF-BAND FILTER,
INTERLEAVING & AGC
CHANNEL 6
8-BIT DSP
LINK PORT
X
IEND
OR
RAM
rCIC2
RESAMPLER
TO C AND D
OUTPUT
PORTS
COEFFICIENT
FILTER
RCF OUTPUTS
CHANNELS 4,5,6,7
16-BIT
PARALLEL
OUTPUT
LID-A
LID-B
CHANNEL 7
RSP
CLK
BUILT-IN (BIST)
SELF-TEST CIRCUITRY
MICROPORT OR SERIAL
PORT CONTROL
SYNCA
SYNCB
SYNCC
SYNCD
CLK
EXTERNAL
SYNC.
CIRCUIT
REV. 0
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