Datasheet > VP16256-27

VP16256-27

更新时间： 2024-11-20 22:36:47

品牌	Logo	应用领域
MITEL		/
页数	文件大小	规格书
20页	230K
描述
Programmable FIR Filter

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VP16256-27 数据手册

VP16256

Programmable FIR Filter

Advance Information

Supersedes August 1997 version, DS4548 - 3.2

DS4548 - 4.0 August 1998

The VP16256 contains sixteen multiplier - accumulators, which

canbemulticycledtoprovidefrom16to128stagesofdigitalfiltering.

Input data and coefficients are both represented by 16-bit two’s

complementnumberswithcoefficientsconvertedinternallyto12bits

and the results being accumulated up to 32 bits.

PIN 1

In16-tapmodethedevicesamplesdataatthesystemclockrate

ofupto40MHz. Ifalowersamplerateisacceptablethenthenumber

ofstagescanbeincreasedinpowersoftwouptoamaximumof128.

Each time the number of stages is doubled, the sample clock rate

mustbehalvedwithrespecttothesystemclock.With128stagesthe

sample clock is therefore one eighth of the system clock.

In all speed modes devices can be cascaded to provide filters of

anylength,onlylimitedbythepossibilityofaccumulatoroverflow.The

32-bit results are passed between cascaded devices without any

intermediate scaling and subsequent loss of precision.

PIN 1 IDENT

208

The device can be configured as either one long filter or two

separate filters with half the number of taps in each. Both networks

can have independent inputs and outputs.

Bothsingleandcascadeddevicescanbeoperatedindecimate-

by-two mode. The output rate is then half the input rate, but twice the

numberofstagesarepossibleatagivensamplerate.Asingledevice

witha40MHzclockwouldthen,forexample,providea128-stagelow

pass filter, with a 10MHz input rate and 5MHz output rate.

Coefficients are stored internally and can be down loaded from

a host system or an EPROM. The latter requires no additional

support, and is used in stand alone applications. A full set of

coefficientsisthenautomaticallyloadedatpoweron,orattherequest

of the system. A single EPROM can be used to provide coefficients

for up to 16 devices.

GH208

Pin identification diagram (top view)

See Table 1 for pin descriptions and Table 2 for pinout

FEATURES

■ Sixteen MACs in a Single Device

■ Basic Mode is 16-Tap Filter at up to 40MHz

Sample Rates

CHANGE

EPROM

COEFF

ADDR DATA

POWER-ON

RESET

■ Programmable to give up to 128 Taps with

Sampling Rates Proportionally Reducing to 5MHz

■ 16-bit Data and 32-bit Accumulators

■ Can be configured as One Long Filter or Two Half-

Length Filters

RES

16256

INPUT

DATA

OUTPUT

DATA

■ Decimate-by-two Option will Double the Filter

Length

■ Coefficients supplied from a Host System or a local

EPROM

SCLK

GND

Fig. 1 A dual filter application

■ 208-Pin Plastic PowerQuad PQ2 Package

CHANGE

EPROM

COEFF

ADDR DATA

POWER-ON

RESET

APPLICATIONS

■ High Performance Commercial Digital Filters

■ Matrix Multiplication

RES

COEFFICIENTS

■ Correlation

16256

■ High Performance Adaptive Filtering

ANALOG

INPUT

OUTPUT

DATA

ADC

ORDERING INFORMATION

VP16256-27/CG/GH1N 27MHz, Commercial plastic

PowerQuad PQ2 package (GH208)

EPROM

GND

CLKOP

SCLK

VP16256-40/CG/GH1N 40MHz, Commercial plastic

PowerQuad PQ2 package (GH208)

Fig. 2 Typical system application

12 3 4 5 6 7...20

中文翻译

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与VP16256-27相关器件

型号	品牌	获取价格	描述	数据表
VP16256-27/CG/GH1N	ZARLINK	获取价格	Programmable FIR FIlter
VP16256-27/CG/GH1R	ZARLINK	获取价格	Digital Filter, PQFP208
VP16256-27CG	MITEL	获取价格	Programmable FIR Filter
VP16256-27CGGH1N	MITEL	获取价格	Programmable FIR Filter
VP16256-27CGGH1R	ETC	获取价格	Digital Filter
VP16256-40	MITEL	获取价格	Programmable FIR Filter
VP16256-40/CG/GH1N	ZARLINK	获取价格	Programmable FIR FIlter
VP16256-40/CG/GH1R	ZARLINK	获取价格	Digital Filter, PQFP208
VP16256-40CG	MITEL	获取价格	Programmable FIR Filter
VP16256-40CGGH1N	MITEL	获取价格	Programmable FIR Filter

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