The ADF4252 is a dual fractional-N/integer-N frequency synthesizer from Analog Devices. It operates from a 2.7V to 3.3V supply voltage and features a programmable dual modulus prescaler, programmable charge pump currents, a 3-wire serial interface, digital lock detection, a power-down mode, and a programmable modulus on the fractional-N synthesizer. ADF4252 can be widely used in mobile radio base stations (GSM, PCS, DCS, CDMA, WCDMA), wireless handsets (GSM, PCS, DCS, CDMA, WCDMA), wireless LANs, communications test equipment, and CATV equipment.
The ADF4252 frequency synthesizer integrates a low‑noise digital phase‑frequency detector, programmable charge pump, and dual‑modulus prescaler for both RF and IF sections. It supports a 3 GHz fractional‑N RF synthesizer and a 1.2 GHz integer‑N IF synthesizer, controlled via a 3‑wire serial interface.
Typical applications include base stations, wireless handsets, LANs, test equipment, and CATV. The device operates from 2.7 V to 3.3 V, offers power‑down mode, and includes lock‑detect and digital lock‑detect features.
| RF Input Sensitivity | -10 dBm to 0 dBm |
|---|---|
| IF Input Frequency | 0.5 GHz – 1.2 GHz |
| Power‑Supply Voltage (Vpp1‑Vpp3) | 2.7 V – 3.3 V |
| Total Supply Current (RF + IF) | 13 mA typ, 16 mA max |
| Maximum Junction Temperature | 150 °C |
The device operates from 2.7 V to 3.3 V on its Vpp1, Vpp2, and Vpp3 pins.
Yes, the device is ESD‑sensitive and requires proper handling precautions.