STW81103

Datasheet | Orderable Products | Features and Description | Technical Documents

Reference	Filesize	Pages	Last Updated
STW81103	1081 K		14/08//2007

Device	Status	Package	Purchase
STW81103AT	Evaluation	VFQFPN28
STW81103ATR	Preview	VFQFPN28

	Integer-N frequency synthesizer
	Dual differential integrated VCOs with automatic center frequency calibration: – Direct output: 2500 - 3050 MHz 4350 - 5000 MHz – Internal divider by 2: 1250 - 1525 MHz 2175 - 2500 MHz – Internal divider by 4: 625 - 762.5 MHz 1087.5 - 1250 MHz
	Excellent integrated phase noise
	Fast lock time: 150 µs
	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 (HW and SW)
	Small size exposed pad VFQFPN28 package 5x5x1.0 mm
	Process: BICMOS 0.35 µm SiGe

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 -155 dBc/Hz. The combination of wide frequency range VCOs (thanks to centerfrequency 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.

Reference	Filesize	Pages	Last Updated
STW81103	1081 K		14/08//2007

Application Notes

Reference Filesize Pages Last Updated AN2452 1358 K 18 14/08//2007 AN2491 155 K 32 13/08//2007