Overview
The ADF4360-4BCP from Analog Devices Inc. is a fully integrated integer-N synthesizer and voltage-controlled oscillator (VCO). This device is designed for a center frequency of 1600 MHz, with an optional divide-by-2 feature that allows for an RF output range of 725 MHz to 875 MHz. It operates with a power supply ranging from 3.0 V to 3.6 V and includes power-down modes for energy efficiency. The synthesizer is controlled via a simple 3-wire interface and features a digital section with a 24-bit input shift register, a 14-bit R counter, and an 18-bit N counter.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| REFIN Input Frequency | 10/250 MHz | min/max | For f < 10 MHz, use dc-coupled CMOS compatible square wave, slew rate > 21 V/µs. |
| REFIN Input Sensitivity | 0.7/AVDD V | p-p min/max | AC-coupled. 0 to AVDD V max CMOS compatible. |
| REFIN Input Capacitance | 5.0 pF | max | |
| REFIN Input Current | ±100 µA | max | |
| Phase Detector Frequency | 8 MHz | max | |
| Charge Pump Current (ICP) | 2.5 mA (high), 0.312 mA (low) | typ | With RSET = 4.7 kΩ. |
| RSET Range | 2.7/10 kΩ | ||
| VCO Core Operating Current | 5 mA, 10 mA, 15 mA, 20 mA | Programmable in four steps. | |
| RF Output Frequency Range | 725 MHz to 875 MHz (divide-by-2), 1600 MHz (center) |
Key Features
- Integrated integer-N synthesizer and VCO.
- Center frequency of 1600 MHz with optional divide-by-2 feature for 725 MHz to 875 MHz output.
- Power supply range: 3.0 V to 3.6 V with power-down modes.
- Simple 3-wire interface for control of on-chip registers.
- Digital section includes a 24-bit input shift register, a 14-bit R counter, and an 18-bit N counter.
- Programmable VCO core operating current in four steps: 5 mA, 10 mA, 15 mA, and 20 mA.
- Linearization circuitry to minimize variation of the product of ICP and KV.
- RF outputs (RFOUTA and RFOUTB) with programmable output levels from 0 dBm to -9 dBm.
Applications
- Wireless handsets (DECT, GSM, PCS, DCS, WCDMA).
- Test equipment.
- Wireless LANs.
- CATV equipment.
Q & A
- What is the center frequency of the ADF4360-4?
The center frequency of the ADF4360-4 is 1600 MHz, with an optional divide-by-2 feature for an output range of 725 MHz to 875 MHz.
- What is the power supply range for the ADF4360-4?
The power supply range for the ADF4360-4 is from 3.0 V to 3.6 V.
- How is the device controlled?
The device is controlled via a simple 3-wire interface.
- What are the key components of the digital section?
The digital section includes a 24-bit input shift register, a 14-bit R counter, and an 18-bit N counter.
- Can the VCO core operating current be programmed?
Yes, the VCO core operating current can be programmed in four steps: 5 mA, 10 mA, 15 mA, and 20 mA.
- What type of linearization does the ADF4360-4 include?
The ADF4360-4 includes linearization circuitry to minimize any variation of the product of ICP and KV.
- What are the typical applications of the ADF4360-4?
The ADF4360-4 is typically used in wireless handsets, test equipment, wireless LANs, and CATV equipment.
- How are the RF outputs configured?
The RF outputs (RFOUTA and RFOUTB) have programmable output levels from 0 dBm to -9 dBm.
- Does the device support power-down modes?
Yes, the device supports power-down modes when not in use.
- What is the function of the REFIN input?
The REFIN input is used for the reference frequency input, which can range from 10 MHz to 250 MHz.
