STW81100 Datasheet, PDF (1/23 Pages) STMicroelectronics – MULTI-BAND RF FREQUENCY SYNTHESIZER WITH INTEGRATED VCOS

STW81100
MULTI-BAND RF FREQUENCY SYNTHESIZER WITH
INTEGRATED VCOS
DATASHEET
1 Features
■ Integer-N Frequency Synthesizer
■ Dual differential integrated VCOs with
automatic center frequency calibration:
– Direct Output:
3280 – 3900 MHz
3800 – 4400 MHz
– Internal divider by 2:
1640 – 1950 MHz
1900 – 2200 MHz
– Internal divider by 4:
820 – 975 MHz
950 – 1100 MHz
■ Fast lock time: 150µs
■ Dual modulus prescaler (64/65) and 2
programmable counters to achieve a feedback
division ratio from 4096 to 32767.
■ Programmable reference frequency divider (9
bits)
■ Phase frequency comparator and charge pump
■ Programmable charge pump current
■ Digital Lock Detector
■ I²C bus interface with 3 bit programmable
address (1100A₂A₁A₀)
■ 3.3V Power Supply
■ Power down mode
■ Small size exposed pad VFQFPN28 package
5x5x1.0mm
■ Process: BICMOS 0.35µm SiGe
Figure 1. Package
VFQFPN28
Table 1. Order Codes
Part Number
STW81100AT
STW81100ATR
Package
VFQFPN28
VFQFPN28 in Tape & Reel
tors (VCOs).
Showing high performance, high integration, low
power, and multi-band performances, STW81100
is a low cost one chip alternative to discrete PLL
and VCOs solutions.
STW81100 includes an Integer-N frequency syn-
thesizer and two fully integrated VCOs featuring
low phase noise performance and a noise floor of
-153dBc/Hz. The combination of wide frequency
range VCOs (thanks to center-frequency calibra-
tion over 32 sub-bands) and multiple output op-
tions (direct output, divided by 2 or divided by 4)
allows to cover the 820MHz-1100MHz, the
1640MHz-2200MHz and the 3280MHz-4400MHz
bands.
The STW81100 is designed with STMicroelectron-
ics advanced 0.35µm SiGe process.
2 Description
The STMicroelectronics STW81100 is an integrat-
ed RF synthesizer and voltage controlled oscilla-
3 Applications
■ Cellular 3G Infrastructure Equipment
■ Other Wireless Communication Systems
April 2005
Rev. 2
1/23