STW81101

STW81101 Multi-band RF frequency synthesizer with integrated VCOs Features ■ 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: 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 with a 3-bit programmable address (1100A2A1A0) ■ 3.3 V power supply ■ Power down mode (hardware and software) ■ Small size exposed pad VFQFPN28 package 5 x 5 x 1.0 mm ■ Process: BICMOS 0.35 µm SiGe 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 a...