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P

RODUCT

S

PECIFICATION

4

Z87200

S

PREAD

-S

PECTRUM

T

RANSCEIVER

FEATURES

Min

PN Rate*

Max Data

Speed

(Mchips) Rate* (Mbps) (MHz) Package

11

2.048

20/45

100-Pin

PQFP

s

4

Full- or Half-Duplex Operation

Device

Z87200

Benefits

s

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

Note:

*45 MHz only

s

s

Complete

Direct

Sequence

Transceiver in a Single CMOS IC

Spread-Spectrum

s

s

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

s

s

s

s

s

s

s

s

s

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

DS96WRL0400

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-

4-1

next

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