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LF43168JC15 参数 Datasheet PDF下载

LF43168JC15图片预览
型号: LF43168JC15
PDF下载: 下载PDF文件 查看货源
内容描述: 数字滤波器\n [Digital Filter ]
分类和应用:
文件页数/大小: 16 页 / 186 K
品牌: LOGIC [ LOGIC DEVICES INCORPORATED ]
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LF43168
DEVICES INCORPORATED
Dual 8-Tap FIR Filter
LF43168
DEVICES INCORPORATED
Dual 8-Tap FIR Filter
DESCRIPTION
The
LF43168
is a high-speed dual FIR
filter capable of filtering data at real-
time video rates. The device contains
two FIR filters which may be used as
two separate filters or cascaded to
form one filter. The input and coeffi-
cient data are both 10-bits and can be
in unsigned, two’s complement, or
mixed mode format.
The filter architecture is optimized for
symmetric coefficient sets. When
symmetric coefficient sets are used,
each filter can be configured as an 8-tap
FIR filter. If the two filters are cas-
caded, a 16-tap FIR filter can be
implemented. When asymmetric
coefficient sets are used, each filter is
configured as a 4-tap FIR filter. If both
filters are cascaded, an 8-tap filter can
be implemented. The LF43168 can
decimate the output data by as much
as 16:1. When the device is pro-
grammed to decimate, the number of
clock cycles available to calculate filter
taps increases. When configured for
16:1 decimation, each filter can be
configured as a 128-tap FIR filter (if
symmetric coefficient sets are used).
By cascading these two filters, the
device can be configured as a 256-tap
FIR filter.
There is on-chip storage for 32
different sets of coefficients. Each set
consists of eight coefficients. Access
to more than one coefficient set
facilitates adaptive filtering opera-
tions. The 28-bit filter output can be
rounded from 8 to 19 bits.
FEATURES
u
66 MHz Data and Computation Rate
u
Two Independent 8-Tap or Single
16-Tap FIR Filters
u
u
u
u
10-bit Data and Coefficient Inputs
32 Programmable Coefficient Sets
Supports Interleaved Coefficient Sets
User Programmable Decimation up
to 16:1
u
Maximum of 256 FIR Filter Taps,
16 x 16 2-D Kernels, or 10 x 20-bit
Data and Coefficients
u
Replaces Harris HSP43168
u
Package Styles Available:
• 84-pin Plastic LCC, J-Lead
• 100-pin Plastic Quad Flatpack
LF43168 B
LOCK
D
IAGRAM
INB
9-0
/
OUT
8-0
9
10
10
MUX
INA
9-0
CSEL
4-0
CIN
9-0
A
8-0
WR
5
10
9
COEFFICIENT
BANK A
FILTER
CELL A
MUX
COEFFICIENT
BANK B
FILTER
CELL B
CONTROL
MUX/ADDER
9
19
OUT
27-9
OEL
OEH
Video Imaging Products
1
03/28/2000–LDS.43168-H