Overview
The ADF4252BCPZ-R7 is a dual fractional-N/integer-N frequency synthesizer produced by Analog Devices Inc. This component is designed to implement local oscillators (LO) in the upconversion and downconversion sections of wireless receivers and transmitters. It features a low noise digital phase frequency detector (PFD), a precision charge pump, and programmable reference dividers, making it versatile for various wireless communication applications.
Key Specifications
| Parameter | Rating/Value |
|---|---|
| Operating Temperature | −40°C to +85°C |
| Package Type | 24-Lead Lead Frame Chip Scale Package (LFCSP) |
| VDD1, VDD2, VDD3, DVDD to GND | −0.3 V to +4 V |
| REFIN, RFINA, RFINB to GND | −0.3 V to VDD + 0.3 V |
| VP1, VP2 to GND | −0.3 V to +5.8 V |
| Digital Input/Output Voltage to GND | −0.3 V to VDD + 0.3 V |
| Analog Input/Output Voltage to GND | −0.3 V to VDD + 0.3 V |
| Reference Input Frequency | Up to 250 MHz |
| PFD Frequency | Up to 20 MHz |
| Channel Step Resolution | Down to 200 kHz |
Key Features
- Dual fractional-N/integer-N frequency synthesizer
- Low noise digital phase frequency detector (PFD) and precision charge pump
- Programmable reference dividers and modulus on fractional-N synthesizer
- Σ-Δ-based fractional interpolator for RF synthesizer and programmable integer-N counters for IF synthesizer
- 3-wire serial interface for data input
- Digital lock detect and power-down mode
- Pulse swallow function and phase frequency detector (PFD) with charge pump
Applications
- Base stations for mobile radio (GSM, PCS, DCS, CDMA, WCDMA)
- Wireless handsets (GSM, PCS, DCS, CDMA, WCDMA)
- Wireless LANs
- Communications test equipment
- CATV equipment
Q & A
- What is the operating temperature range of the ADF4252BCPZ-R7?
The operating temperature range is −40°C to +85°C. - What type of package does the ADF4252BCPZ-R7 come in?
The component comes in a 24-Lead Lead Frame Chip Scale Package (LFCSP). - What is the maximum reference input frequency for the ADF4252BCPZ-R7?
The maximum reference input frequency is up to 250 MHz. - What is the minimum channel step resolution for the ADF4252BCPZ-R7?
The minimum channel step resolution is down to 200 kHz. - Does the ADF4252BCPZ-R7 support digital lock detect?
Yes, it supports digital lock detect. - What is the purpose of the pulse swallow function in the ADF4252BCPZ-R7?
The pulse swallow function is used to optimize the phase-locked loop (PLL) performance by adjusting the prescaler counters. - Can the ADF4252BCPZ-R7 be used in wireless LAN applications?
Yes, it can be used in wireless LAN applications. - What is the maximum PFD frequency for the ADF4252BCPZ-R7?
The maximum PFD frequency is up to 20 MHz. - Does the ADF4252BCPZ-R7 have a power-down mode?
Yes, it has a power-down mode. - How is data input handled in the ADF4252BCPZ-R7?
Data is input through a 3-wire serial interface.
