ADF4106BRU

Overview

The ADF4106BRU is an Integer-N PLL frequency synthesizer from Analog Devices Inc., housed in a 16-lead TSSOP package. It supports RF input frequencies from 500 MHz to 6.0 GHz with a maximum output frequency of 325 MHz for the prescaler stage. The device operates on a single supply voltage ranging from 2.7 V to 3.3 V, drawing a typical current of 9.0 mA at 3 V. Key specifications include a normalized phase noise floor of -223 dBc/Hz and a programmable charge pump with currents up to 5 mA. It features a 3-wire serial interface, separate charge pump supply (VP) for extended tuning, and dual-modulus prescalers (8/9, 16/17, 32/33, 64/65).

Feature Summary

• Integrated low-noise digital phase frequency detector and precision charge pump.
• Programmable dual-modulus prescaler options: 8/9, 16/17, 32/33, or 64/65.
• Separate VP pin allows charge pump supply up to 5.5 V for extended VCO tuning.
• Hardware and software power-down modes reduce current consumption to 10 µA.

Applications

• Local oscillators for broadband wireless access systems.
• Clock generators for satellite communication equipment.
• Base stations for wireless radio networks.
• Instrumentation requiring precise frequency synthesis.

Procurement Notes

Verify the specific suffix 'BRU' corresponds to the 16-lead TSSOP package variant when sourcing. Confirm that the B version meets the required industrial temperature range of -40°C to +85°C. Ensure the external loop filter and VCO are compatible with the device's RF input sensitivity and charge pump current capabilities.

Selection Notes

Select this component for applications requiring high bandwidth up to 6.0 GHz without frequency doublers. Choose appropriate prescaler values (P) based on the target RF frequency to ensure the divided signal remains below 325 MHz for the CMOS counters. Verify that the reference input frequency falls within the 20 MHz to 300 MHz range for optimal PFD operation.

Part Context

The ADF4106 belongs to the ADF4106 family of frequency synthesizers. Other variants include the ADF4106BCPZ in a 20-lead LFCSP package and the ADF4106SRUZ-EP for extended performance. The BRU suffix specifically denotes the standard industrial grade TSSOP package configuration.

Replacement Considerations

The ADF4107BRU is a related part with a higher maximum input frequency of 7 GHz but is listed as discontinued. For direct pin-compatible replacements, verify availability of the ADF4106BCPZ if LFCSP packaging is acceptable, though pin counts differ.