Datasheet > LF43168QC15

LF43168QC15

更新时间： 2024-11-22 22:19:59

品牌	Logo	应用领域
逻辑 - LOGIC		/
页数	文件大小	规格书
16页	186K
描述
Dual 8-Tap FIR Filter

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LF43168QC15 数据手册

LF43168

DEVICES INCORPORATED

Dual 8-Tap FIR Filter

LF43168

Dual 8-Tap FIR Filter

DEVICES INCORPORATED

FEATURES

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.

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.

❑ 66 MHz Data and Computation Rate

❑ Two Independent 8-Tap or Single

16-Tap FIR Filters

❑ 10-bit Data and Coefficient Inputs

❑ 32 Programmable Coefficient Sets

❑ Supports Interleaved Coefficient Sets

❑ User Programmable Decimation up

to 16:1

❑ Maximum of 256 FIR Filter Taps,

16 x 16 2-D Kernels, or 10 x 20-bit

Data and Coefficients

The filter architecture is optimized for

symmetric coefficient sets. When

symmetric coefficient sets are used,

❑ Replaces Harris HSP43168

each filter can be configured as an 8-tap There is on-chip storage for 32

❑ Package Styles Available:

• 84-pin Plastic LCC, J-Lead

• 100-pin Plastic Quad Flatpack

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

different sets of coefficients. Each set

consists of eight coefficients. Access

to more than one coefficient set

facilitates adaptive filtering opera-

configured as a 4-tap FIR filter. If both tions. The 28-bit filter output can be

filters are cascaded, an 8-tap filter can rounded from 8 to 19 bits.

LF43168 BLOCK DIAGRAM

INB9-0

OUT8-0

INA9-0

CSEL4-0

CIN9-0

A8-0

COEFFICIENT

BANK A

FILTER

CELL A

COEFFICIENT

BANK B

FILTER

CELL B

CONTROL

MUX/ADDER

OUT27-9

OEL

OEH

Video Imaging Products

03/28/2000–LDS.43168-H

12 3 4 5 6 7...16

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