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PDSP16256/A Programmable FIR Filter
| Product Status - Production |
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The PDSP16256 contains sixteen multiplier - accumulators, which can be multi-cycled to provide from 16 to 128 stages of digital filtering. Input data and coefficients are both represented by 16-bit two's complement numbers with coefficients converted internally to 12 bits and the results being accumulated up to 32 bits.
In 16-tap mode the device samples data at the system clock rate of up to 25 MHz. If a lower sample rate is acceptable then the number of stages can be increased in powers of two up to a maximum of 128. Each time the number of stages is doubled, the sample clock rate must be halved with respect to the system clock. With 128 stages the sample clock is therefore one eighth of the system clock.
In all speed modes devices can be cascaded to provide filters of any length, only limited by the possibility of accumulator overflow. The 32-bit results are passed between cascaded devices without any intermediate scaling and subsequent loss of precision.
Features
- Sixteen MACs in a Single Device
- Basic Mode is 16-Tap Filter at up to 25 MHz Sample Rates Programmable to give up to 128 Taps with Sampling Rates Proportionally
- Reducing to 3.125 MHz
- 16-bit Data and 32-bit Accumulators
- Can be configured as One Long Filter or Two Half-Length Filters
- Decimate-by-two Option will Double the Filter Length
- Coefficients supplied from Host System or local EPROM
Typical Applications
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High Performance Digital Filters
Product Information
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Product Availability and Packaging
| Ordering Part No. |
Package Type |
No. of Pins |
Lead-free Option |
Shipping Option |
Lead Time (Weeks) |
Status |
 |
| PDSP16256/MC/AC1R |
PGA |
144 |
|
Trays |
22 Week(s) |
Production |
| PDSP16256/MC/GC1R |
LDCC (POWER) |
172 |
|
Trays |
|
Obsolete |
Product Lead-Times when quoted are not guaranteed and are provided as a
general guideline only; they may be varied from time to time without
notice. Updated estimates or actual schedule commit dates will be provided
at the time of order placement with Zarlink or its distributor.
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| Copyright 2008, Zarlink Semiconductor Inc. All Rights Reserved. |
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PDSP16256/A Data Sheet
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