hsp43481 Intersil Corporation, hsp43481 Datasheet

hsp43481

Manufacturer Part Number

hsp43481

Description

Digital Filter

Manufacturer

Intersil Corporation

Datasheet

1.HSP43481.pdf (1 pages)

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September 1997

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.

Features

• Four Filter Cells

• 0MHz to 30MHz Sample Rate

• 8-Bit Coefﬁcients and Signal Data

• 26-Bit Accumulator per Stage

• Filter Lengths Up to 1032 Tap

• Expandable Coefﬁcient Size, Data Size and Filter

• Decimation by 2, 3 or 4

Applications

• 1-D and 2-D FIR Filters

• Radar/Sonar

• Adaptive Filters

• Echo Cancellation

• Complex Multiply-Add

• Sample Rate Converters

Ordering Information

Block Diagram

HSP43481JC-20

HSP43481JC-25

HSP43481JC-30

HSP43481GC-20

HSP43481GC-25

HSP43481GC-30

Length

PART NUMBER

Harris Corporation 1997

Semiconductor

DCM0 - DCM1

CIN0 - CIN7

ADR0 - 1

TURE RANGE

SHADD

SENBH

ERASE

SENBL

RESET

DIENB

CIENB

TEMPERA-

TCCI

C to +70

CLK

RESET

CLK

ADR0, ADR1

FILTER

CELL 0

68 Lead PLCC

68 Lead PGA

PACKAGE

FILTER

CELL 1

DIN0 - DIN7 TCS

SUM0 - 25

3-1

OUTPUT

STAGE

MUX

Description

The HSP43481 is a video-speed Digital Filter (DF) designed

to efﬁciently implement vector operations such as FIR digital

ﬁlters. It is comprised of four ﬁlter cells cascaded internally

and a shift-and-add output stage, all in a single integrated

circuit. Each ﬁlter cell contains an 8 x 8 multiplier, three dec-

imation registers and a 26-bit accumulator which can add

the contents of any ﬁlter cell accumulator to the output stage

accumulator shifted right by eight-bits. The HSP43481 has a

maximum sample rate of 30MHz. The effective multiply-

accumulate (MAC) rate is 120MHz.

The HSP43481 can be conﬁgured to process expanded

coefﬁcient and word sizes. Multiple devices can be cascaded

for larger ﬁlter lengths without degrading the sample rate or

a single device can process larger ﬁlter lengths at less than

30MHz with multiple passes. The architecture permits pro-

cessing ﬁlter lengths of over 1000 taps with the guarantee of

no overﬂows. In practice, most ﬁlter coefﬁcients are less than

1.0, making even larger ﬁlter lengths possible. The

HSP43481 provides for unsigned or two’s complement arith-

metic, independently selectable for coefﬁcients and signal

data.

Each DF ﬁlter cell contains three resampling or decimation

registers which permit output sample rate reduction at rates of

vide the capability to perform 2-D operations such as N x N

spatial correlations/convolutions for image processing appli-

cations.

FILTER

CELL 2

HSP43481

the input sample rate. These registers also pro-

FILTER

CELL 3

TCCO

COUT0 - COUT 7

COENB

File Number

Digital Filter

2759.4

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