HSP43216_07 Datasheet, PDF (1/20 Pages) Intersil Corporation – Halfband Filter

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Data Sheet
April 18, 2007
HSP43216
FN3365.9
Halfband Filter
Features
The HSP43216 Halfband Filter addresses a wide variety of
applications by combining f_S/4 (f_S = sample frequency)
quadrature up/down convert circuitry with a fixed coefficient
halfband filter processor as shown in the block diagram.
These elements may be configured to operate in one of the
four following modes: decimate by 2 filtering of a real input
signal; interpolate by 2 filtering of a real input signal; f_S/4
quadrature down conversion of a real input signal followed
by decimate-by-2 filtering to produce a complex analytic
signal; interpolate-by-2 filtering of a complex analytic signal
followed by f_S/4 quadrature up conversion to produce a real
valued output.
The frequency response of the HSP43216's halfband filter
has a shape factor, (passband+transition band)/passband, of
1.24:1 with 90dB of stopband attenuation. The passband
has less than 0.0003dB of ripple from 0f_S to 0.2f_S with
stopband attenuation of greater than 90dB from 0.3f_S to
Nyquist. At 0.25f_S the filter provides 6dB of attenuation.
The HSP43216 processes data streams with word widths up
to 16-bits and data rates up to 52MSPS. The processing
throughput of the part is easily doubled to rates of up to
104MSPS by using the part together with an external
multiplexer or demultiplexer. Programmable rounding is
provided to support output precisions from 8-bits to 16-bits.
• Sample Rates to 52MSPS
• Architected to Support Sample Rates to 104MSPS Using
External Multiplexer
• Four Modes of Operation:
- Interpolate by 2 Filtering
- Decimate by 2 Filtering
- Quadrature to Real Signal Conversion
- f_S/4 Quadrature Down Conversion Followed by
Decimate by 2 Filtering
• 16-Bit Inputs and Outputs
• 67-Tap Halfband FIR Filter with 20-Bit Coefficients
• Two’s Complement or Offset Binary Outputs
• Programmable Rounding on Outputs
• 1.24:1 Filter Shape Factor
• >90dB Stopband Attenuation
• <0.0003dB Passband Ripple
• Saturation Logic on Output
Applications
• Digital Down Conversion
• D/A and A/D pre/post Filtering
• Tuning Bandwidth Expansion for HSP45116 and
HSP45106
Ordering Information
PART NUMBER
PART MARKING
TEMP. RANGE (°C)
PACKAGE
PKG. DWG. #
HSP43216JC-52
HSP 43216JC-52
0 to +70
84 Ld PLCC
N84.1.15
HSP43216VC-52
HSP 43216VC-52
0 to +70
100 Ld MQFP
Q100.14x20
HSP43216VC-52Z (Note)
HSP 43216VC-52Z
0 to +70
100 Ld MQFP (Pb-free) Q100.14x20
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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