uaa3535hl NXP Semiconductors, uaa3535hl Datasheet - Page 2
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uaa3535hl
Manufacturer Part Number
uaa3535hl
Description
Low Power Gsm/dcs/pcs Multi-band Transceiver
Manufacturer
NXP Semiconductors
Datasheet
1.UAA3535HL.pdf
(24 pages)
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Philips Semiconductors
FEATURES
APPLICATIONS
GENERAL DESCRIPTION
The UAA3535HL is intended for Global Systems for
Mobile communication (GSM), Digital Cellular
communication Systems (DCS) and Personal
Communication Services (PCS). The circuit integrates the
receiver and most of the transmitter section of hand-held
transceivers for these applications.
The receiver consists of two sections. The first section is
the RF receiver front-end, which amplifies the GSM, DCS
or PCS aerial signal, then converts the chosen channel
down to a low Intermediate Frequency (IF) of 100 kHz,
and also provides more than 35 dB image suppression.
Some selectivity is provided at this stage by an on-chip
low-pass filter and channel selectivity is provided by a high
performance integrated band-pass filter.
ORDERING INFORMATION
2000 Feb 17
UAA3535HL
Multi-band application for GSM, DCS and PCS cellular
phone systems
Low noise and wide dynamic range low IF receiver
More than 35 dB on-chip image rejection in receive
mode
More than 64 dB gain control range in receive mode
Integrated channel filter
Integrated TX low-pass filter
High precision I/Q modulator
Multi-band TX modulation loop architecture including
offset mixer and phase-frequency detector
Dual PLL with on-chip fully integrated IF VCO
Fully differential design minimizing crosstalk and
spurious signals
Functional down to 2.4 V and up to 3.6 V
3-wire serial bus interface
LQFP48 package.
GSM 900 MHz, DCS 1800 MHz and PCS 1900 MHz
hand-held transceivers.
Low power GSM/DCS/PCS multi-band transceiver
NUMBER
TYPE
LQFP48
NAME
plastic low profile quad flat package; 48 leads; body 7
2
DESCRIPTION
The second section is the IF section, which further
amplifies the chosen channel and performs gain control to
adjust the output level to the desired value. The IF gain
can be varied over more than 64 dB gain range.
The transmitter also consists of two sections. The first is a
high precision I/Q modulator which converts the baseband
modulation up to the transmit IF. The second is a
modulation loop architecture which converts the signal
to RF.
The Local Oscillator (LO) signals are provided by an
on-chip Voltage Controlled Oscillator (VCO) for operation
of the IF section and are provided externally for operation
of the RF section. The frequencies of the RF and IF VCOs
are set by internal PLL circuits, which are programmable
via a 3-wire serial bus. Comparison frequencies are
200 kHz (100 kHz step programmability) and 13 MHz for
the RF and IF PLL respectively, and are derived from a
13 MHz reference signal which has to be supplied
externally. The quadrature-phase RF LO signals required
for I/Q mixers in reception are generated internally.
The quadrature LO signals required for operation of the
I/Q modulator are generated inside the IF VCO.
The circuit can be powered-up into one of three different
modes: RX, TX or SYN mode, depending on the logic
state of pins RXON, TXON and SYNON, respectively. It is
also possible to set the IC in one of these modes by
software, using the 3-wire bus serial programming.
In RX (TX) mode, all sections required for receive
(transmit) are turned on. The SYN mode is used to
power-up the synthesizers prior to the RX or TX mode.
In the SYN mode, some internal LO buffers are also
powered-up in such a way that VCO pulling is minimized
when switching on the receiver or the transmitter.
Additional band selection is done using the 3-wire bus
serial programming, allowing the required enabling of the
Low Noise Amplifiers (LNAs) and charge pumps current
programming.
PACKAGE
7
1.4 mm
Objective specification
UAA3535HL
SOT313-2
VERSION