MB15F8xUL Series
Fractional-N / Integer dual
PLL Frequency Synthesizers
ꢀ DESCRIPTION
Packages
The Fujitsu MB15F8xUL series dual PLLs are serial input
Frequency synthesizers. The Fractional-N PLL operates up to 2.6
GHz and the integer PLL operates up to 1200 MHz. They have
built-in dual-modulus prescalers enabling pulse swallow operation
and fixed or selectable fractional modulo. The latest advanced
BiCMOS technology is used resulting in a super low supply
current. A refined charge pump design (Fujitsu’s Super Charger)
provides fast tuning along with low spurious noise and phase
noise characteristics. The MB15F8xUL series is ideally suited for
digital mobile communications, including GSM, DCS1800,
PCS1900, IS-136, IS-95 and ISM applications.
20-pin, Plastic TSSOP
FPT-20P-M06
20-pad, Plastic BCC
LCC-20P-M05
ꢀ FEATURES
• Wide operating temperature: –40 to +85°C
• New 30% smaller BCC 20 package
• Plastic 20-pin TSSOP
• Selectable charge pump current (±1.5 or ±6.0 mA)
• Evaluation Kits available
• Fractional-N RF PLL and Integer IF PLL
• Very low spurious and phase noise characteristics
• Low operating voltage: 2.4 to 3.6 volts
• Low operating current: 5.8 to 6 mA (typical)
• Power-saving current: 0.1µA (typical)
Parameter
MB15F83UL
MB15F86UL
MB15F88UL
RF/RX Frequency - max.
IF/TX Frequency - max
2 GHz
600 MHz
2.7V
2.5 GHz
600 MHz
2.7V
2.6 GHz
1.2 GHz
2.7V
Low Power Supply Voltage
Low Power Supply Current
5.8 Ma
5.8 mA
6.0 mA
RF = 16/17
RF = 16/17 or 32/33
IF = 8/9 or 16/17
Rx = 32/33
Prescaler Divide Ratios
IF = 8/9 OR 16/17
Tx = 16/17 or 32/33
RF = 3 to 127
RF = 3 to 255
RF = 8 to 16383
IF = 8 to 16383
Reference Divider
IF = 3 to 16383
IF = 3 to 16383
Fractional Function
Fractional Counter
RF = modulo 13 fixed
RF = 0 to 15
RF = modulo 3 to 16
RF = 0 to 15
RF = modulo 5 or 8
RF = 0 to 15
RF = 0 to 31
IF = 0 to 15
RF = 0 to 31
IF = 0 to 31
RX = 0 to 31
TX = 0 to 31
Swallow Counter
RF = 18 to 1,023
IF = 3 to 2.027
RF = 18 to 1,023
IF = 3 to 2.027
RF = 34 to 1,023
TX = 3 to 2.027
Programmable Counter
Power Saving Function
0.1µA typ.
Reference Information: MB15F86UL
Frequencies: 1051.98 to 1078.17
Step Size:
Hop Time:
30 kHz
Less than 2 Ms
Charge Pump: 1.5 mA
VCO Sens: 25 MHz/V
Loop Filter Values
Test Results
Phase Noise = -76.34 dBc/Hz
Spurious = -88.35 dBc
Switching Times
1051.98 to 1078.17 =1.36 ms
1078.17 to 1051.98 = 1.28 ms
Reference Information: MB15F88UL
Frequencies: 2490 to 2550 MHz
Step Size:
200 kHz
Hop Time:
Charge Pump: 6.0 mA
Less than 2 µs
VCO Sens: 52 MHz/V
Loop Filter values
Test Results
Phase Noise = -76.3 dBc/Hz
Spurious = -67.2 dBc
Switching Times
2490 to 2550 MHz = 144 µs
2550 to 2490 MHz = 133 µs
Package Dimensions
MB15F8xULPFT - 20 pin, Plastic SSOP (FPT-20P-M06)
MB15F8xULPVA - 20 pin, Plastic BCC (LCC-20P-M05)
Evaluation Systems
Designing a complex subsystem, such as a PLL, is no easy task. Therefore, Fujitsu has made available an
evaluation system to aid in the development of reliable frequency synthesizers. Each evaluation system
consists of two PCBs, controlling software, and instructions.
The RF PCB is laid out to allow the target MB158xUL to be optimized for the chosen application. The RF
board is only semi-populated, which allows the user to configure it to fit the application.
Evaluation Board P/N's
MB1500EB16 for the TSSOP Package
MB1500EB16B for the BCC Package
Typical Evaluation Board
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PLL-DS-20933-5/2002
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