STW81103 Datasheet, PDF (1/53 Pages) STMicroelectronics – Multi-band RF frequency synthesizer with integrated VCOs

STW81103
Multi-band RF frequency synthesizer with integrated VCOs
Features
■ Integer-N frequency synthesizer
■ Dual differential integrated VCOs with
automatic center frequency calibration:
– 2500 - 3050 MHz (direct output)
– 4350 - 5000 MHz (direct output)
– 1250 - 1525 MHz (internal divider by 2)
– 2175 - 2500 MHz (internal divider by 2)
– 625 - 762.5 MHz (internal divider by 4)
– 1087.5 - 1250 MHz (internal divider by 4)
■ Excellent integrated phase noise
■ Fast lock time: 150µs
■ Dual modulus programmable prescaler
(16/17 or 19/20)
■ 2 programmable counters to achieve a
feedback division ratio from 256 to 65551
(prescaler 16/17) and from 361 to 77836
(prescaler 19/20).
■ Programmable reference frequency divider
(10 bits)
■ Phase frequency comparator and charge pump
■ Programmable charge pump current
■ Digital lock detector
■ Dual digital bus interface: SPI and I²C bus (fast
mode) with 3 bit programmable address
(1100A₂A₁A₀)
■ 3.3 V power supply
■ Power down mode (hardware and software)
■ Small size exposed pad VFQFPN28 package
5 mm x 5 mm x 1.0 mm
■ Process: BICMOS 0.35 µm SiGe
Applications
■ 2.5G and 3G Cellular infrastructure equipment
■ CATV equipment
■ Instrumentation and test equipment
■ Other wireless communication systems
Description
The STMicroelectronics STW81103 is an
integrated RF synthesizer with voltage controlled
oscillators (VCOs). Showing high performance,
high integration, low power, and multi-band
performances, STW81103 is a low cost one chip
alternative to discrete PLL and VCOs solutions.
STW81103 includes an Integer-N frequency
synthesizer and two fully integrated VCOs
featuring low phase noise performance and a
noise floor of -155dBc/Hz. The combination of
wide frequency range VCOs (thanks to center-
frequency calibration over 32 sub-bands) and
multiple output options (direct output, divided by 2
or divided by 4) allows to cover the
625 MHz-762.5 MHz, the 1087.5 MHz-1525 MHz,
the 2175 MHz-3050 MHz and the
4350 MHz-5000 MHz bands.
The STW81103 is designed with
STMicroelectronics advanced 0.35 µm SiGe
process.
March 2008
Rev 3
1/53
www.st.com
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