STW81101 Datasheet, PDF (1/42 Pages) STMicroelectronics – Multi-band RF frequency synthesizer with integrated VCOs

STW81101
Multi-band RF frequency synthesizer with integrated VCOs
Preliminary Data
Feature summary
■ 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
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
Order codes
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 VCOs solutions.
STW81101 includes an Integer-N frequency
synthesizer and two fully integrated VCOs
featuring low phase noise performance and a
noise floor of -154dBc/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 825MHz-
1100MHz, the 1650MHz-2200MHz and the
3300MHz-4400MHz bands.
The STW81101 is designed with
STMicroelectronics advanced 0.35µm SiGe
process.
Part number
STW81101AT
STW81101ATR
Temp range, °C
-40 to 85
-40 to 85
Package
VFQFPN28
VFQFPN28
Packing
Tray
Tape & Reel
March 2006
Rev 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
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