PE3291

Features: • Ultra-Low Power via FlexiPower variable supply voltages• Modulo-32 fractional-N main counters• On-board fractional spur compensation: No tuning required, stable over temperature• Improved phase noise compared to integer-N architecturesApplication• CDMA han...

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SeekIC No. : 004457763 Detail

PE3291: Features: • Ultra-Low Power via FlexiPower variable supply voltages• Modulo-32 fractional-N main counters• On-board fractional spur compensation: No tuning required, stable over te...

floor Price/Ceiling Price

Part Number:
PE3291
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/12

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Product Details

Description



Features:

• Ultra-Low Power via FlexiPower variable supply voltages
• Modulo-32 fractional-N main counters
• On-board fractional spur compensation: No tuning required, stable over temperature
• Improved phase noise compared to integer-N architectures



Application

• CDMA handsets
• CDMA base stations
• Analog Cordless phones
• One and two way pagers



Pinout

  Connection Diagram


Specifications

Symbol
Parameter/Conditions
Min
Max
Units
VDD
Supply voltage
-0.3
4.0
V
VI
Voltage on any input
-0.3
VDD
+ 0.3
V
II
DC into any input
-10
+10
mA
IO
DC into any output
-10
+10
mA
Tstg
Storage temperature range
-65
150
°C



Description

The PE3291 is a dual fractional-N FlexiPowerTM phase-lock loop (PLL) IC designed for frequency synthesis. Each PLL PE3291 includes a FlexiPowerTM prescaler, phase detector, charge pump and onboard fractional spur compensation.

The FlexiPower PE3291 prescalers are supplied power on dedicated pins and can operate at a substantial power savings at voltages as low as 0.8 volts, while allowing a 3 volt charge pump supply. For 3 volt only systems, on-chip voltage regulation of PE3291 may be used to generate the prescaler power supplies.

Figure 1 illustrates the implementation of the FlexiPower technology. The prescaler power supply of PE3291 may be provided externally or internally regulated down from VDD. In a typical 950 MHz application the total current consumed by the PLL is 2.1 mA. Operation at reduced current levels provides significant battery life extension. The PE3291 allows the system designer to minimize power consumption by controlling the voltage on the prescaler. For additional operating speeds and current consumptions refer to Figures 5 and 6.

PE3291 provides fractional-N division with power-of-two denominator values up to 32. This allows comparison frequencies up to 32 times the channel spacing, providing a lower phase noise floor than integer PLLs PE3291. The 32/33 RF prescaler (PLL1) operates up to 1200 MHz and the 16/17 IF prescaler (PLL2) operates up to 550 MHz.

The PE3291 Phase Locked-Loop is manufactured on Peregrine's UltraCMOS™ process, a patented variation of silicon-on-insulator (SOI) technology on a sapphire substrate, offering the performance of GaAs with the economy and integration of conventional CMOS.




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