SA8027

General description

The SA8027 BICMOS device integrates programmable dividers, charge pumps and phase comparators to implement phase-locked loops. The device is designed to operate from 3 NiCd cells, in pocket phones, with low current and nominal 3 V supplies.

The synthesizer operates at VCO input frequencies up to 2.5 GHz. The synthesizer has fully programmable main, auxiliary and reference dividers. All divider ratios are supplied via a 3-wire serial programming bus. The main divider is a fractional-N divider with programmable integer ratios from 512 to 65535.

Separate power and ground pins are provided to the charge pumps and digital circuits. The ground pins should be externally connected to prevent large currents from flowing across the die and causing damage. V_DDCP must be equal to or greater than V_DD.

The charge pump current (gain) is fully programmable, while I_SET is set by an external resistance at the R_SET pin (refer to section 1.5, Main Output Charge Pumps and Fractional Compensation Currents). The phase/frequency detector charge pump outputs allow for implementing a passive loop filter.

Features

• Low phase noise
• Low power
• Fully programmable main and auxiliary dividers
• Programmable Normal & Integral charge pumps outputs
• Fast Locking Adaptive mode design
• Internal fractional spurious compensation
• Hardware and software power down
• Split supply for V_DD and V_DDCP
• Loop filter bandwidth programmability

Products/packages

Pricing/ordering/availability

Applications

• 500 to 2500 MHz wireless equipment
• Cellular phones (all standards)
• WLAN
• Portable battery-powered radio equipment.

Technical documents

Application Notes

AN10159_1; SA8027: 2.5 GHz fractional-N 550 MHz IF integer frequency synthesizer (26-Jun-02)

Support Documents

75015145; Specialty Analog Audio Amplifiers (2005-07-01)

Print / Email

• Print this information
• Email this information

Disclaimer

The information published on product information pages of the www.nxp.com or www.semiconductors.com websites is an extract from product data sheets and is for information purposes only. For detailed information please check the most recent version of the relevant product data sheet as published on these websites. In the event of any conflict between product information pages and data sheets or deviations from information provided in the product data sheets on these product information pages, the information provided in the product data sheets shall prevail.

The product status of the product(s) described in the product data sheet may have changed since publication of the data sheet and therefore information in datasheets on product status may be outdated. The latest information on product status is published on the product information pages of the above-mentioned websites.

As from October 1st, 2006 Philips Semiconductors has a new trade name - NXP Semiconductors, which will be used in future data sheets together with new contact details. In data sheets where the previous Philips references remain, please use the new links as shown below.

http://www.philips.semiconductors.com use http://www.nxp.com

http://www.semiconductors.philips.com use http://www.nxp.com (Internet)

sales.addresses@www.semiconductors.philips.com use salesaddresses@nxp.com (e-mail)

The copyright notice at the bottom of each page (or elsewhere in the document, depending on the version)
- © Koninklijke Philips Electronics N.V. (year). All rights reserved -
is replaced with:
- © NXP B.V. (year). All rights reserved.-

If you have any questions related to the data sheet, please contact our nearest sales office via e-mail or phone (details via salesaddresses@nxp.com). Thank you for your cooperation and understanding.