STW81101_07 Datasheet, PDF (1/48 Pages) STMicroelectronics – Multi-band RF frequency synthesizer with integrated VCOs

STW81101
Multi-band RF frequency synthesizer with integrated VCOs
Features
■ Integer-N frequency synthesizer
■ Dual differential integrated VCOs with
automatic center frequency calibration:
– 3300 - 3900 MHz (Direct output)
– 3800 - 4400 MHz (Direct output)
– 1650 - 1950 MHz (Internal divider by 2)
– 1900 - 2200 MHz (Internal divider by 2)
– 825 - 975 MHz (Internal divider by 4)
– 950 - 1100 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 with
a 3-bit programmable address (1100A₂A₁A₀)
■ 3.3V power supply
■ Power down mode (HW and SW)
■ Small size exposed pad VFQFPN28 package
5x5x1.0mm
■ Process: BICMOS 0.35µm SiGe
VFQFPN28
Applications
■ 2.5G and 3G cellular infrastructure equipment
■ CATV equipment
■ Instrumentation and test equipment
■ Other wireless communication systems
Description
The STMicroelectronics STW81101 is an
integrated RF synthesizer with voltage controlled
oscillators (VCOs). Showing high performance,
high integration, low power, and multi-band
performances, STW81101 is a low-cost one-chip
alternative to discrete PLL and VCO solutions.
The STW81101 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 (using center-
frequency calibration over 32 sub-bands) and
multiple output options (direct output, divided by
2, or divided by 4) allows coverage of the
825MHz-1100MHz, 1650MHz-2200MHz and
3300MHz-4400MHz bands.
The STW81101 is designed with
STMicroelectronics advanced 0.35µm SiGe
process.
August 2007
Rev 3
1/48
www.st.com
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