ADF4154BRU-REEL7

Overview

The ADF4154BRU-REEL7 is a fractional-N frequency synthesizer manufactured by Analog Devices Inc. It implements local oscillators in wireless receiver and transmitter sections, featuring a low-noise digital phase-frequency detector, precision charge pump, and Sigma-Delta based fractional interpolator. The device supports RF frequencies up to 4 GHz with a 2.7 V to 3.3 V power supply. Key specifications include a programmable dual-modulus prescaler (4/5 or 8/9), a fast-lock mode with a built-in timer, and a 3-wire serial interface for register control. It operates within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Fractional-N synthesis with Sigma-Delta interpolator for programmable modulus
• Integrated fast-lock mode with built-in countdown timer
• RF bandwidth extending to 4 GHz with programmable dual-modulus prescaler
• 3-wire serial interface for complete on-chip register control

Applications

• Base stations for mobile radio including WiMAX, GSM, CDMA, and W-CDMA
• Wireless handsets such as PMR, PCS, DCS, and WCDMA devices
• CATV equipment and Wireless LANs
• Communications test equipment

Procurement Notes

Verify the component status before procurement as the ADF4154BRU-REEL7 may be subject to discontinuation notices. Confirm that the TSSOP-16 package and specific electrical parameters match the design requirements. Ensure compatibility with existing loop filter designs and VCO tuning ranges when integrating this synthesizer into the system.

Selection Notes

Select the ADF4154BRU-REEL7 for applications requiring fractional-N synthesis up to 4 GHz. Consider the fast-lock feature if rapid frequency switching is required. Ensure the external VCO tuning voltage does not exceed the VP pin maximum rating of 5.5 V. Verify that the reference input frequency falls within the 10 MHz to 250 MHz range for optimal performance.

Part Context

The ADF4154BRU-REEL7 belongs to the ADF4154 series of fractional-N frequency synthesizers. It is pin-compatible with other Analog Devices PLLs such as the ADF4110, ADF4111, ADF4112, ADF4113, ADF4106, and ADF4153. This compatibility allows for potential direct replacements in designs utilizing these related components, provided the specific fractional-N capabilities are required.

Replacement Considerations

The ADF4154 is pin-compatible with the ADF4110, ADF4111, ADF4112, ADF4113, ADF4106, and ADF4153. When replacing Integer-N variants with this Fractional-N device, verify that the loop filter design accommodates the different noise characteristics and spurious behavior inherent to fractional-N synthesis.