ADF4112BCP

Overview

The ADF4112BCP is an integer-N RF PLL frequency synthesizer from Analog Devices, designed for local oscillator implementation in wireless transceivers. It features a low-noise digital phase frequency detector, precision charge pump, and programmable dual-modulus prescaler (8/9, 16/17, 32/33, 64/65). The device supports RF input frequencies up to 3.0 GHz with a maximum PFD frequency of 55 MHz. Operating on a single supply of 2.7 V to 5.5 V, it draws a typical current of 6.5 mA at 5 V. The B version ensures operation across an industrial temperature range of −40°C to +85°C.

Feature Summary

• RF Input Frequency Range: 0.2 GHz to 3.0 GHz
• Programmable Dual-Modulus Prescaler: 8/9, 16/17, 32/33, 64/65
• Maximum Phase Detector Frequency: 55 MHz
• Power Supply Range: 2.7 V to 5.5 V

Applications

• Base stations for wireless radio (GSM, PCS, DCS, CDMA, WCDMA)
• Wireless handsets (GSM, PCS, DCS, CDMA, WCDMA)
• Communications test equipment
• CATV equipment

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm package type and tape/reel specifications. Ensure the component grade matches the required operating temperature range. Cross-reference the datasheet revision to confirm electrical parameters remain unchanged.

Selection Notes

Select the ADF4112 when an RF input frequency up to 3.0 GHz is required. Compare power consumption and phase noise performance against the ADF4111 (1.2 GHz) and ADF4113 (4.0 GHz) variants within the same family. Ensure the external VCO tuning voltage requirements are met by the separate VP supply pin.

Part Context

The ADF4112 belongs to the ADF4110 family of integer-N PLL synthesizers. This family shares a common architecture including a 24-bit input register, 3-wire serial interface, and hardware/software power-down modes. Other members include the ADF4110 (550 MHz), ADF4111 (1.2 GHz), and ADF4113 (4.0 GHz).

Replacement Considerations

Direct functional replacements within the same family include the ADF4110, ADF4111, and ADF4113, provided their respective RF frequency limits meet the application requirements. Verify pin compatibility and register software compatibility before substitution.