z87200 ZiLOG Semiconductor, z87200 Datasheet - Page 3

• Manufacturer Part Number: z87200
• Description: Spread-spectrum Transceiver
• Manufacturer: ZiLOG Semiconductor

FEATURES
Note: *45 MHz only
GENERAL DESCRIPTION
The Z87200 is a programmable single-chip, spread-spec-
trum, direct-sequence transceiver. The Z87200 incorpo-
rates Stanford Telecom spread-spectrum and wireless
technology and is identical to Stanford Telecom's STEL-
2000A. By virtue of its fast acquisition capabilities and its
ability to support a wide range of data rates and spread-
spectrum parameters, the Z87200 spread-spectrum trans-
ceiver supports the implementation of a wide range of
burst data communications applications.
Available in both 45- and 20-MHz versions, the Z87200
performs all the digital processing required to implement a
fast-acquisition direct sequence (such as pseudonoise- or
Z87200
Device
Complete
Transceiver in a Single CMOS IC
Programmable Functionality Supports Many Different
Operational Modes
Acquires Within One Symbol Duration Using Digital PN
Matched Filter
Two Independent PN Sequences, Each up to 64 Chips
Long for Distinct Processing of the Acquisition/Preamble
Symbol and Subsequent Data Symbols
Power Management Features
Optional Spectral Whitening Code Generation
PN Rate*
(Mchips)
Min
11
Direct
Rate* (Mbps)
Max Data
Sequence
2.048
Speed
(MHz) Package
20/45
Spread-Spectrum
PS010202-0601
100-Pin
PQFP
Z87200
S
Benefits
PN-modulated), spread-spectrum full- or half-duplex sys-
tem. Differentially encoded BPSK and QPSK are fully sup-
ported. The receiver section can also handle differentially
encoded pi/4 QPSK. A block diagram of the Z87200 is
shown in Figure 1; its pin configuration is shown in Z87200
receive functions integrate the capabilities of a digital
downconverter, PN matched filter, and DPSK demodula-
tor, where the input signal is an analog-to-digital converted
I.F. signal. Z87200 transmit functions include a differential
BPSK/QPSK encoder, PN modulator (spreader), and
BPSK/QPSK modulator, where the transmitter output is a
sampled digitally modulated signal ready for external digi-
PREAD
Full- or Half-Duplex Operation
High Performance and High Reliability for Reduced
Manufacturing Costs
Ideal for a Wide Range of Wireless Applications
Including Data Acquisition Systems, Transaction
Systems, and Wireless Local Area Networks (WLANs)
Fast Response and Very Low Overhead when
Operating in Burst Modes
Allows High Processing Gain to Maximize the
Acquisition Probability, then Reduced Code Length for
Increased Data Rate
Reduced Power Consumption
Randomizes Data to Meet Regulatory Requirements
Permits Dual Frequency (Frequency Division Duplex) or
Single Frequency (Time Division Duplex) Operation
Small Footprint, Surface Mount
-S
PECTRUM
P
RODUCT
T
RANSCEIVER
S
4-1
PECIFICATION
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