Philips Semiconductors
Product specification
Advanced pager receiver
FEATURES
•
Wide frequency range: VHF, UHF and 900 MHz bands
•
High sensitivity
•
High dynamic range
•
Electronically adjustable filters on chip
•
Suitable for data rates up to 2400 bits/s
•
Wide frequency offset and deviation range
•
Fully POCSAG compatible FSK receiver
•
Power on/off mode selectable by the chip enable input
•
Low supply voltage; low power consumption
•
1-cell battery-low detection circuit
•
High integration level
•
Interfaces directly to the PCA5000A, PCF5001 and
PCD5003 POCSAG decoders.
APPLICATIONS
•
Wide area paging
•
On-site paging
•
Telemetry
•
RF security systems
•
Low bit-rate wireless data links.
ORDERING INFORMATION
TYPE
NUMBER
UAA2082H
UAA2082U
PACKAGE
NAME
LQFP32
28 pads
naked die; see Fig.8
DESCRIPTION
plastic low profile quad flat package; 32 leads; body 7
×
7
×
1.4 mm
GENERAL DESCRIPTION
UAA2082
The UAA2082 is a high-performance low-power radio
receiver circuit primarily intended for VHF, UHF and
900 MHz pager receivers for wide area digital paging
systems, employing direct FM non-return-to-zero (NRZ)
frequency shift keying (FSK).
The receiver design is based on the direct conversion
principle where the input signal is mixed directly down to
the baseband by a local oscillator on the signal frequency.
Two complete signal paths with signals of 90° phase
difference are required to demodulate the signal.
All channel selectivity is provided by the built-in IF filters.
The circuit makes extensive use of on-chip capacitors to
minimize the number of external components.
The battery monitoring circuit has an external sense input
and a 1.1 V detection threshold for easy operation in a
single-cell supply concept.
The UAA2082 was designed to operate together with the
PCA5000A, PCF5001 or PCD5003 POCSAG decoders,
which contain a digital input filter for optimum call success
rate.
VERSION
SOT358-1
1996 Jan 15
2
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