Dual serial input pll frequency synthesizer (26 pages)
Summary of Contents for Fujitsu MB15C02
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MB15C02 ■ DESCRIPTION The Fujitsu Microelectronics MB15C02 is a serial input Phase Locked Loop (PLL) frequency synthesizer with a prescaler. A 64/65 division is available for the prescaler that enables pulse swallow operation. This operates with a supply voltage of 1.0 V (min.).
MB15C02 ■ PIN DESCRIPTIONS Pin no. Descriptions SSOP SSOP name – Power supply voltage Clock input for the shift register.(Schmitt trigger input) Clock Data is shifted into the shift register on the rising edge of the clock. – – No connection Data Serial data input using binary code.(Schmitt trigger input) Load enable signal input (Schmitt trigger input)
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MB15C02 (Continued) Pin no. Descriptions SSOP SSOP name Oscillator output. Connection for an external crystal. – – No connection Programmable reference divider input. Oscillator input. Clock can be input to OSC from outside. In the case, please leave OSC pin open and make connection with OSC as AC coupling.
MB15C02 ■ ABSOLUTE MAXIMUM RATINGS Rating Parameter Symbol Unit Remark Min. Max. Power supply voltage GND–0.5 +2.0 Input voltage GND–0.5 +0.5 Output voltage GND–0.5 +0.5 Output current –10 °C Storage temperature –40 +125 WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings.
MB15C02 ■ ELECTRICAL CHARACTERISTICS (For 220 MHz :V = Vp = 1.0 to 1.5 V, Ta = –20 to +60°C) (For 330 MHz :V = Vp = 1.2 to 1.5 V, Ta = –20 to +60°C) (For 450 MHz :V = Vp = 1.3 to 1.5 V, Ta = –20 to +60°C) Value Parameter...
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MB15C02 ■ FUNCTION DESCRIPTIONS 1. Pulse Swallow Function The divide ratio can be calculated using the following equation: = [(M × N) + A] × f ÷ R (A < N) : Output frequency of external voltage controlled oscillator (VCO) : Preset divide ratio of binary 12-bit programmable counter (5 to 4,095) : Preset divide ratio of binary 6-bit swallow counter (0 to 63) : Output frequency of the reference frequency oscillator...
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MB15C02 Divide ratio range: Prescaler : M = 64, M+1=65 Swallow counter : A = 0 to 63 Programmable counter : N = 5 to 4095 The MB15C02 uses the pulse swallow method; consequently, the divide rations of the swallow and programmable counters must satisfy the relationship N>A.
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MB15C02 (b) Charge pump The charge pump is available in two forms: internal external. Internal charge pump output (Do) External charge pump outputs (φR, φP) (c) Phase comparator input/output waveforms The phase comparator outputs logic levels summarized in Table 1, according to the phase error between fr and fp.
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MB15C02 (d) Lock detector The lock detector detects the lock and unlock states of the PLL. The lock detector outputs “H” when the PLL enters the lock state and outputs “L” when the PLL enters the unlock state as shown in Figure 2. When PS = “L”, the lock detector outputs “H”...
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MB15C02 4. Setting the Divide Ratio (1) Serial data format The format of the serial data is shown is Figure 3. The serial data is composed of a control bit and divide ratio setting data. The control bit selects the programmable divider or programmable reference divider. In case of the programmable divider, serial data consists of 18 bits(6 bits for the swallow counter and 12 bits for the programmable counter) and 1 control bit as shown in Figure 3.1.
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MB15C02 (2) The flow of serial data Serial data is received via data pin in synchronization with the clock input and loaded into shift register which contains the divide ratio setting data and into the control register which contains the control bit. The logical product (through the AND gate in Figure 4) of LE and the control register output (i.e., control bit) is fed to the enable input of the latches.
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MB15C02 (4) Setting the divide ratio for the programmable reference divider Columns R0-R13 of Table 3 represent the divide ratio of the programmable reference counter. The control bit is set to 1. Table.3 Divide ratio for the programmable reference divider Divide ratio ⋅...
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MB15C02 Since the divide rations are unpredictable when the MB15C02 is turned on, it is necessary to initialize the divide ratio for both dividers at power-on time. As shown in Figure 6, after setting the divide ratio for one of the dividers (e.g., programmable reference divider), set LE to “H”...
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MB15C02 ■ TYPICAL CHARACTERISTICS 1. fin Input Sensitivity fin input frequency vs. Input sensitivity 20.0 Ta = +25°C 10.0 −10.0 −20.0 −30.0 −40.0 = 1.0 V = 1.2 V −50.0 = 1.3 V = 1.5 V −60.0 1000 fin input frequency (MHz) 2.
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MB15C02 3. fin Power Supply Voltage Power supply voltage vs. fin input frequency (MHz) 1000 Ta = +25°C Vfin = −2.0 (dBm) Power supply voltage (V) 4. OSC Power Supply Voltage Power supply voltage vs. OSC input frequency Ta = +25°C Vfin = −2.0 (dBm) Power supply voltage (V)
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MB15C02 5. I Power Supply Current Input frequency vs. power supply current Ta = +25°C = 1.0 V = 1.2 V = 1.3 V = 1.5 V 1000 Input frequency (MHz)
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MB15C02 6. Do (Charge Pump) Power Supply Voltage ) vs. I (at V = 0.2 V) Ta = +25°C ) vs. I (at V – 0.2 V) –5.0 Ta = +25°C –4.5 –4.0 –3.5 –3.0 –2.5 –2.0 –1.5 –1.0 –0.5...
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MB15C02 7. Spectrum Wave Form ∆MKR −85.50 dB ATTEN 10 dB UAUG 16 RL 0 dBm 10dB/ 25.0 kHz • LOCK Frequency : 286.0 MHz (fr = 25 kHz) • V = 1.2 V, V = 1.2 V ∆MKR Ta = +25°C 25.0 kHz −85.50 dB CENTER 286.0000 MHz...
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MB15C02 8. Lock Up Time • LOCK Frequency: 290.0 MHz to 286.0 MHz (fr = 25 kHz) • V = 1.2 V, V = 1.2 V, Ta = +25°C 290.0 MHz → 286.0 MHz, within ± 1 kHz 4.00 ms ∆MKr x : 3.99999984 ms A euts N/A...
MB15C02 (Continued) • LOCK Frequency: PS on to 286.0 MHz (fr = 25 kHz) • V = 1.2 V, V = 1.2 V, Ta = +25°C PS ON → 286.0 MHz, within ± 1 kHz 2.00 ms ∆MKr x : 1.99999978 ms A euts N/A y : −680 Hz 286.0050...
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(2) for use requiring extremely high reliability (i.e., submersible repeater and artificial satellite). Please note that FUJITSU MICROELECTRONICS will not be liable against you and/or any third party for any claims or damages arising in connection with above-mentioned uses of the products.