參數(shù)資料
型號(hào)： HSP43220JC-25Z
廠商： Intersil
文件頁(yè)數(shù)： 3/21頁(yè)
文件大?。?/td> 0K
描述： IC DECIMATING DGTL FILTER 84PLCC
標(biāo)準(zhǔn)包裝： 15
濾波器類型： 數(shù)字
濾波器數(shù)： 4
電源電壓： 4.75 V ~ 5.25 V
安裝類型： 表面貼裝
封裝/外殼： 84-LCC（J 形引線）
供應(yīng)商設(shè)備封裝： 84-PLCC（29.21x29.21）
包裝： 管件
11
FN2486.10
October 10, 2008
FIR Output
The 40 most significant bits of the accumulator are latched
into the output register. The lower 3 bits are not brought to
the output. The 40 bits out of the output register are selected
to be output by a pair of multiplexers. This register is clocked
by FIR_CK (see Figure 9).
There are two multiplexers that route 24 of the 40 output bits
from the output register to the output pins. The first
multiplexer selects the output register bits that will be routed
to output pins DATA_OUT16-23 and the second multiplexer
selects the output register bits that will be routed to output
pins DATA_OUT0-15.
The multiplexers are controlled by the control signal F_BYP
and the OUT_SELH pin. F_BYP and OUT_SELH both
control the first multiplexer that selects the upper 8 bits of
the output bus, DATA_OUT16-23. F_BYP controls the
second multiplexer that selects the lower 16 bits of the
output bus, DATA_OUT0-15. The output formatter is shown
in detail in Figure 10.
FIR Control Logic
The DATA_RDY strobe indicates that new data is available on
the output of the FIR. The rising edge of DATA_RDY can be
used to load the output data into an external register or RAM.
Data Format
The DDF maintains 16 bits of accuracy in both the HDF and
FIR filter stages. The data formats and bit weightings are
shown in Figure 11.
FIGURE 9. FIR FILTER
REG
PRE-ADDER
16
F_ESYM
F_OAD
16
17
16
17
PRE-ADDER LOGIC
20
17
17 x 20 BIT MULTIPLIER ARRAY
REG
43-BIT ACCUMULATOR
37
43
F_CLA
MULTIPLIER/
ACCUMULATOR
SECTION
FROM HDF
FROM COEFFICIENT
FORMATTER
16
20
16 x 512
DATA
RAM
20 x 256
COEFFICIENT
RAM
OUTPUT
FORMATTER
OUTPUT REG
MUX
40
F_CLA
DATA_RDY
FIR_CK
DATA_OUT 0 -23
REG
FIR_CK
DATA_RDY
FROM CONTROL REGISTERS
F_DRATE
F_TAPS
F_BYP
F_DIS
FIR CONTROL LOGIC
24
HSP43220
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HSP43220JC-33 功能描述:有源濾波器 DECIMATING DIGITAL FILTER 84 PLCC, 33MHZ RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
HSP43220JC-33Z 功能描述:有源濾波器 W/ANNEAL DECIMATING DIGTL FILTER 33MHZ RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
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