HSP50214B

HSP50214B TM Data Sheet May 2000 File Number 4450.3 Programmable Downconverter [ /Title digitized IF data into filtered baseband data which can be (HSP5 processed by a standard DSP microprocessor. The 0214B) Programmable Downconverter (PDC) performs down conversion, decimation, narrowband low pass filtering, gain /Subscaling, resampling, and Cartesian to Polar coordinate ject conversion. (ProThe 14-bit sampled IF input is down converted to baseband gramby digital mixers and a quadrature NCO, as shown in the mable Block Diagram. A decimating (4 to 32) fifth order Cascaded Down- Integrator-Comb (CIC) filter can be applied to the data conbefore it is processed by up to 5 decimate-by-2 halfband verter) filters. The halfband filters are followed by a 255-tap /Autho programmable FIR filter. The output data from the programmable FIR filter is scaled by a digital AGC before r () being re-sampled in a polyphase FIR filter. The output /Keysection can provide seven types of data: Cartesian (I, Q), words polar (R, θ), filtered frequency (dθ/dt), Timing Error (TE), and (Inter- AGC level in either parallel or serial format. sil Corpo- Ordering Information ration, PART TEMP. NUMBER RANGE (oC) PACKAGE PKG. NO. DownconHSP50214BVC 0 to 70 120 Ld MQFP Q120.28x28 verter, HSP50214BVI -40 to 85 120 Ld MQFP Q120.28x28 Down Converter, ProBlock Diagram grammable MICROPROCESSOR READ/WRITE DownCONTROL C(7:0) conLEVEL DETECT verter, 5TH DSP, ORDER CIC AMPS, FILTER TDMA IN(13:0) , North 5TH GAIN ORDER AmeriAD...