STW81101

Datasheet | Orderable Products | Features and Description | Technical Documents

Reference	Filesize	Pages	Last Updated
STW81101	1079 K	48	14/08/2007

Device	Status	Package	Purchase
STW81101AT	Active	VFQFPN2 5x5x1.0 28 PITCH 0.5	Yes

	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) - 1650 - 1950 MHz (Internal divider by 2) - 1650 - 1950 MHz (Internal divider by 2) - 1650 - 1950 MHz (Internal divider by 2)
	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)
	3.3 V power supply
	Power down mode (HW and SW)
	Small size exposed pad VFQFPN28 package 5x5x1.0 mm
	Process: BICMOS 0.35μm SiGe

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 -154 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
825-1100 MHz, the 1650-2200 MHz and the 3300-4400 MHz bands.

The STW81101 is designed with STMicroelectronics advanced 0.35μm SiGe process.

Reference	Filesize	Pages	Last Updated
STW81101	1079 K	48	14/08/2007

Application Notes

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