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STW81100AT bảng dữ liệu(PDF) 1 Page - STMicroelectronics

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STW81100
April 2005
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: 150
µs
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
I
2C 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 0.35
µm SiGe
2
Description
The STMicroelectronics STW81100 is an integrat-
ed RF synthesizer and voltage controlled oscilla-
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 0.35
µm SiGe process.
3
Applications
Cellular 3G Infrastructure Equipment
Other Wireless Communication Systems
DATASHEET
MULTI-BAND RF FREQUENCY SYNTHESIZER WITH
INTEGRATED VCOS
Rev. 2
Figure 1. Package
Table 1. Order Codes
Part Number
Package
STW81100AT
VFQFPN28
STW81100ATR
VFQFPN28 in Tape & Reel
VFQFPN28


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