Analog Devices ADF4153 Product Info

• RF bandwidth to 4 GHz
• 2.7 V to 3.3 V power supply
• Separate V_P allows extended tuning voltage
• Y version available: -40°C to +125°C
• Programmable fractional modulus
• Programmable charge pump currents
• 3-wire serial interface
• Analog and digital lock detect
• Power-down mode
• Pin compatible with the ADF4110/ADF4111/ADF4112/ADF4113 and ADF4106
• Consistent RF output phase
• Loop filter design possible with ADIsimPLL
• Qualified for automotive applications

The ADF4153 is a fractional-N frequency synthesizer that implements local oscillators in the upconversion and downconversion sections of wireless receivers and transmitters. It consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. There is a Σ-Δ based fractional interpolator to allow programmable fractional-N division. The INT, FRAC, and MOD registers define an overall N divider (N = (INT + (FRAC/MOD))). In addition, the 4-bit reference counter (R counter) allows selectable REFIN frequencies at the PFD input. A complete phase- locked loop (PLL) can be implemented if the synthesizer is used with an external loop filter and a voltage controlled oscillator (VCO).

A simple 3-wire interface controls all on-chip registers. The device operates with a power supply ranging from 2.7 V to 3.3 V and can be powered down when not in use.

Applications

• CATV equipment
• Base stations for mobile radio (GSM, PCS, DCS, WiMAX, SuperCell 3G, CDMA, W-CDMA)
• Wireless handsets (GSM, PCS, DCS, CDMA, W-CDMA)
• Wireless LANs, PMR
• Communications test equipment