HSP50216 Datasheet, PDF (1/53 Pages) Intersil Corporation – Four-Channel Programmable Digital DownConverter

PRELIMINARY
Data Sheet
HSP50216
February 2000 File Number 4557.2
Four-Channel Programmable Digital
DownConverter
The HSP50216 Quad Programmable Digital DownConverter
(QPDC) is designed for high dynamic range applications
such as cellular basestations where multiple channel
processing is required in a small physical space. The QPDC
combines into a single package, a set of four channels which
include: digital mixers, a quadrature carrier NCO, digital
filters, a resampling filter, a Cartesian-to-polar coordinate
converter and an AGC loop.
The HSP50216 accepts four channels of 16-bit real digitized
IF samples which are mixed with local quadrature sinusoids.
Each channel carrier NCO frequency is set independently by
the microprocessor. The output of the mixers are filtered with
a CIC and FIR filters, with a variety of decimation options.
Gain adjustment is provided on the filtered signal. The digital
AGC provides a gain adjust range of up to 96dB with
programmable thresholds and slew rates. A cartesian to
polar coordinate converter provides magnitude and phase
outputs. A frequency discriminator provides a frequency
output via the FIR filter. Selectable outputs include I
samples, Q samples, Magnitude, Phase, Frequency and
AGC gain. The output resolution is selectable from 4-bit fixed
point to 32-bit floating point.
The maximum output bandwidth achievable using a single
channel is at least 1MHz.
Features
• Up to 70MSPS Input
• Four Independently Programmable Downconverter
Channels in a single package
• Four Parallel 16-Bit Inputs -Fixed or Floating Point Format
• 32-Bit Programmable Carrier NCO with > 115dB SFDR
• 110dB FIR Out of Band Attenuation
• Decimation from 8 to >65536
• 24-bit Internal Data Path
• Digital AGC with up to 96dB of Gain Range
• Filter Functions
- 1 to 5 Stage CIC Filter
- Halfband Decimation and Interpolation FIR Filter
- Programmable FIR Filter
- Resampling FIR Filter
• Cascadable Filtering for Additional Bandwidth
• Four Independent Serial Outputs
• 3.3V Operation
Applications
• Narrow-Band TDMA through IS-95 CDMA Digital Software
Radio and Basestation Receivers
Ordering Information
PART
NUMBER
HSP50216KI
TEMP
RANGE (^oC)
PACKAGE
-40 to +85 196 Ld BGA
PKG. NO
V196.12x12
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
FOR MORE INFORMATION CONTACT: JUAN GARCIA - 321-729-5883 | Copyright © Intersil Corporation 2000