Jun. 2001 Edition 0.2 ASSP Dual Serial Input PLL Frequency Synthesizer MB15F76UL n DESCRIPTION The Fujitsu MB15F76UL is a serial input Phase Locked Loop (PLL) frequency synthesizer with a 6000MHz and a 1500MHz prescalers. Both IF and RF PLL section have a 1/4 divider. And a 16/17 or a 32/33 for the 6000MHz prescaler, and a 4/5 or a 8/9 for the 1500MHz prescaler can be selected for the prescaler that enables pulse swallow operation. The latest BiCMOS process is used, as a result, a supply current is typically 9.0mA typ. at 3.0V. The supply voltage range is from 2.7V to 3.6V. A refined charge pump supplies well-balanced output current with 1.5mA and 6mA selectable by serial data. Fast locking is acheived for adopting the new circuit. The new package(BCC20) decreases a mount area of MB15F76UL more than 30% comparing with the former BCC16(for dual PLL). MB15F76UL is ideally suited for wireless communications, such as W-LAN. n FEATURES • High frequency operation: RF synthesizer : 6000MHz max IF synthesizer : : 1500MHz max • Low power supply voltage: V C C = 2.7 to 3.6 V • Ultra Low power supply current : I C C = 9.0 mA typ. (VCC = V p =3.0V, Ta=25°C, SW=0 in RF, IF locking state) • Direct power saving function : Power supply current in power saving mode Typ. 0.1 µA(Vcc=Vp=3.0V, Ta=25°C), Max. 10 µA(Vcc=Vp=3.0V) • Dual modulus prescaler : 6000MHz prescaler(16/17 or 32/33, and 1/4divider) • 1500MHz prescaler(4/5 or 8/9, and 1/4divider) • Serial input 14-bit programmable reference divider: R = 3 to 16,383 • Serial input programmable divider consisting of: - Binary 5-bit swallow counter: 0 to 31 - Binary 13-bit programmable counter: 3 to 8191 • On-chip phase comparator for fast lock and low noise • On-chip phase control for phase comparator • Operating temperature: Ta = –40 to 85°C P n i m i l re . y ar 20-pad, Plastic BCC (LCC-20P-M05) 1 Jun. 2001 Edition 0.2 MB15F76UL n PIN ASSIGNMENT Data OSCIN GND Clock finIF 1 XfinIF 2 GNDIF 3 VccIF 4 PSIF 5 VpIF 6 20 19 18 17 TOP VIEW 7 8 9 10 DoIF DoRF VpRF LD/fout LCC-20P-M05 2 16 LE 15 finRF 14 Xfin RF 13 GNDRF 12 VCCRF 11 PSRF Jun. 2001 Edition 0.2 n MB15F76UL PIN DESCRIPTIONS Pin No. Pin name I/O 1 fin IF I Prescaler input pin for the IF-PLL section. Connection to an external VCO should be AC coupling. 2 Xfin IF I Prescaler complimentary input for the IF-PLL section. This pin should be grounded via a capacitor. 3 GNDIF - Ground for the IF-PLL section. 4 Vcc I F - Power supply voltage input pin for the IF-PLL section(except for the charge pump circuit), the shift register and the oscillator input buffer. When power is OFF, latched data of IF-PLL is lost. 5 PSIF I Power saving mode control for the IF-PLL section. This pin must be set at ”L” Power-ON. (Open is prohibited.) PSIF = ”H” ; Normal mode PSI F = ”L” ; Power saving mode 6 Vp I F - Power supply voltage input pin for the IF-PLL charge pump. 7 Do IF O Charge pump output for the IF-PLL section. Phase characteristics of the phase detector can be reversed by FC-bit. 8 LD/fout O Lock detect signal output(LD)/ phase comparator monitoring outut (fout). The output signal is selected by a LDS bit in a serial data. LDS bit = "1" ; outputs fout signal LDS bit = "0" ; outputs LD sihnal 9 DoR F O Charge pump output for the RF-PLL section. Phase characteristics of the phase detector can be reversed by FC-bit. 10 VpRF - Power supply voltage input pin for the RF-PLL charge pump. 11 PS R F I Power saving mode control for the RF-PLL section. This pin must be set at ”L” Power-ON. (Open is prohibited.) PSRF = ”H” ; Normal mode PSR F = ”L” ; Power saving mode 12 VccRF - Power supply voltage input pin for the RF-PLL section(except for the charge pump circuit). 13 GNDR F - Ground for the RF-PLL section. 14 XfinR F I Prescaler complimentary input for the RF-PLL section. This pin should be grounded via a capacitor. 15 finR F I Prescaler input pin for the RF-PLL. Connction to an external VCO should be AC coupling. 16 LE I Load enable signal input (with the schmitt trigger circuit.) When LE is set "H", data in the shift register is transferred to the corresponding latch according to the control bit in a serial data. Descriptions 17 Data I Serial data input (with the schmitt trigger circuit.) A data is transferred to the corresponding latch (IF-ref counter, IF-prog. counter, RF-ref. counter, RF-prog. counter) according to the control bit in a serial data. 18 Clock I Clock input for the 23-bit shift register (with the schmitt trigger circuit.) One bit data is shifted into the shift register on a rising edge of the clock. 19 OSCIN I The programmable reference divider input. TCXO should be connected with a AC coupling capacitor. 20 GND - Ground for OSC input buffer and the shift registor circuit. 3 Jun. 2001 Edition 0.2 MB15F76UL n BLOCK DIAGRAM VCCIF (4) PS IF (5) 3-bit latch Intermittent mode control LDS (IF–PLL) SW IF FC IF 5-bit latch 13-bit latch Binary 5-bit swallow counter Binary 13-bit programmable counter (IF–PLL) (IF–PLL) fp IF Vp I F (6) GNDI F (3) Phase comp. Charge Current pump Switch (IF–PLL) (IF–PLL) (7) DoIF Prescaler (IF–PLL) 4/5,8/9 finIF (1) XfinIF (2) 2-bit latch 14-bit latch 1-bit latch 1/4divider T1 T2 Lock Det. (IF–PLL) C/P setting current Binary 14–bit programmable ref. counter(IF–PLL) LD IF fr I F OSCin(19) Fast lock tuning AND OR T1 finRF (15) T2 1/4divider XfinRF (14) 2-bit latch Binary 14-bit programmable ref. counter (RF–PLL) C/P setting current 14-bit latch 1-bit latch Prescaler Selector LD frIF frRF (8) LD/fout fp IF fp RF Lock Det. fr R F (RF–PLL) (RF–PLL) 64/65, 128/129 LDS SW RF FCRF PS RF (11) Intermittent mode control Binary 5-bit swallow counter (RF–PLL) 3-bit latch 5-bit latch Binary 13-bit programmable counter (RF–PLL) Phase comp. (RF–PLL) fp RF Fast lock tuning Charge Current pump Switch (RF–PLL) 13-bit latch (RF–PLL) LE (16) Schmitt circuit Data (17) Schmitt circuit Clock (18) Schmitt circuit Latch selector C N C N 1 2 23-bit shift register (20) GND 4 (12) VccRF (13) (10) GNDRF Vp RF (9) Do RF Jun. 2001 Edition 0.2 n MB15F76UL ABSOLUTE MAXIMUM RATINGS Parameter Symbol Rating Unit VC C –0.5 to +4.0 V Vp Vcc to +4.0 V VI –0.5 to VC C +0.5 V VO GND to V cc V LD/fout VDO GND to Vp V Do Tstg –55 to +125 °C Power supply voltage Input voltage Output voltage Storage temperature Remark Note: Permanent device damage may occur if the above Absolute Maximum Ratings are exceeded. Functional operation should be restricted to the conditions as detailed in the operational sections of this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. n RECOMMENDED OPERATING CONDITIONS Parameter Symbol Value Unit Remark 3.6 V VCCRF = VCCIF 3.0 3.6 V GND – VC C V –40 – +85 °C Min. Typ. Max. VC C 2.7 3.0 Vp Vcc Input voltage VI Operating temperature Ta Power supply voltage Handling Precautions (1) VccRF,VpRF,VccIF and VpIF must supply equal voltage. Even if either RF-PLL or IF-PLL is not used, power must be supplied to both Vcc RF,VpRF, VccIF and VpIF to keep them equal. It is recommended that the non-use PLL is controlled by power saving function. (2) To protect against damage by electrostatic discharge, note the following handling precautions: -Store and transport devices in conductive containers. -Use properly grounded workstations, tools, and equipment. -Turn off power before inserting or removing this device into or from a socket. -Protect leads with conductive sheet, when transporting a board mounted device. 5 Jun. 2001 Edition 0.2 MB15F76UL n ELECTRICAL CHARACTERISTICS (V C C = 2.7 to 3.6 V, Ta = –40 to +85°C) Parameter Symbol "H" level Input voltage "L" level Input voltage "L" level Input current "H" level output voltage mA ICCRF finR F =4750MHz Vcc R F=VpR F =3.0V – 7.0 – mA IPSIF PSIF=PSRF = ”L” – 0.1 *2 10 µA IPSRF PSIF=PSRF = ”L” – 0.1 10 µA fin IF *3 fin IF IF PLL 100 – 1500 MHz finR F *3 finR F RF PLL 2000 – 6000 MHz OSC IN fosc 3 – 40 MHz finIF Pfin IF IF PLL, 50 Ω system -15 – +2 dBm finR F PfinR F RF PLL, 50 Ω system -10 – +2 dBm OSC IN VOSC 0.5 – VC C Vp-p Data, Clock, LE VIH Vcc × 0.7+0.4 – – – – Vcc× 0.3-0.4 Data, Clock, LE, PS OSC IN VIL – – Schmitt trigger input Schmitt trigger input "L" level output voltage High impedance cutoff current "H"level Output current "L" level Output current *2 VIH – Vcc× 0.7 – – VIL – – – Vcc× 0.3 IIH *4 – –1.0 – +1.0 IIL *4 – –1.0 – +1.0 IIH – 0 – +100 IIL *4 – –100 – 0 VO H VC C =Vp =3.0V, IO H =–1mA Vcc – 0.4 – – VOL VC C =Vp =3.0V, IOL =1mA – – 0.4 Do IF Do R F VD O H VC C =Vp =3.0V, ID O H =-0.5mA Vp – 0.4 – – VDOL VC C =Vp =3.0V, IDOL =0.5mA – – 0.4 Do IF Do R F IOFF VC C =Vp =3.0V, VOFF =0.5V to V p–0.5V – – 2.5 IO H*4 VC C = Vp = 3.0V – – -1.0 IO L VC C = Vp = 3.0V 1.0 – – LD/fout "L" level output voltage "H" level output voltage Unit – "L" level Input voltage "H" level Input current Max. 2.0 PS "L" level Input current Typ. – "H" level Input voltage "H" level Input current Min. finIF =570MHz Vcc I F=VpIF =3.0V Power saving current *9 Input sensitivity Value ICCIF Power supply current* 1 Operating frequency Condition LD/fout V V µA µA V V nA mA (Continued) 6 Jun. 2001 Edition 0.2 MB15F76UL (Continued) Ta =(V C C = 2.7 to 3.6 V, Ta = –40 to +85°C) Parameter Symbol "H"level Output current ID O H*4 Do TX *8 Do RX "L" level Output current IDOL Charge pump current rate Min. Typ. Max. CS bit ="1" -8.2 -6.0 -4.1 CS bit ="0" -2.2 -1.5 -0.8 VC C =Vp CS bit ="1" =3.0 V VDOL =Vp /2 CS bit ="0" Ta= 25°C 4.1 6.0 8.2 0.8 1.5 2.2 VC C =Vp =3.0 V VD O H =Vp /2 Ta= 25°C Unit mA ID O L/ID O H ID O M T*5 VD O =Vp/2 – 3 – % vs VDO IDOVD *6 0.5V < VDO < Vp-0.5V – 10 – % vs Ta IDOTA *7 -40°C < Ta < 85 °C, VD O =Vp/2 – 5 – % Conditions; fosc=10MHz, Ta = 25°C, SW="L" in locking state. Vcc I F=VpIF =VccRF =VpR F=3.0V, fosc=10MHz, Ta = 25°C, in power saving mode. AC coupling. 1000pF capacitor is connected under the condition of min. operating frequency. The symbol "-"(minus) means direction of current flow. Vcc=Vp=3.0V, Ta=25°C ( ||I3| - |I4|| ) / [( |I 3 | + |I4| )/2] x 100(%) Vcc=Vp=3.0V, Ta=25°C [( ||I 2 | - |I 1 || ) /2 ] / [( |I 1 | + |I2 | )/2] x 100(%) (Applied to each I DOL , ID O H) Vcc=Vp=3.0V, [(||IDO(85C) | - |I DO(-40C) ||) /2] / [(|I DO(85C) | + |I DO(-40C) |) /2] x 100(%) (Applied to each ID O L, ID O H ) When Charge pump current is measured, set LDS="0", T1="0" and T2="1". PSIF=PSRF =GND (VIL=GND and VIH=Vcc for Clock, Data, LE) I2 I3 IDOL I1 IDOH *1: *2: *3: *4: *5: *6: *7: *8: *9: Value Condition I1 I4 I2 0.5 VP/2 Output voltage(V) VP-0.5 VP 7 Jun. 2001 Edition 0.2 MB15F76UL n FUNCTIONAL DESCRIPTIONS The divide ratio can be calculated using the following equation: fVCO = {(P x N) + A} x 4 x fOSC ÷ R fVCO : P: N: A: fOSC: R: Output frequency of external voltage controlled oscillator (VCO) Preset divide ratio of dual modulus prescaler (4 or 8 for IF-PLL, 16 or 32 for RF-PLL) Preset divide ratio of binary 13-bit programmable counter (3 to 8,191) Preset divide ratio of binary 5-bit swallow counter (0≤ A ≤ 31, condition;A < N) Reference oscillation frequency Preset divide ratio of binary 14-bit programmable reference counter (3 to 16,383) Serial Data Input Serial data is entered using three pins, Data pin, Clock pin, and LE pin. Programmable dividers of IF/RF-PLL sections, programmable reference dividers of IF/RF-PLL sections are controlled individually. Serial data of binary data is entered through Data pin. On a rising edge of clock, one bit of serial data is transferred into the shift register. On a rising edge of load enable signal , the data stored in the shift register is transferred to one of latch of them depending upon the control bit data setting. Table1. Control Bit Control bit Destination of serial data CN1 CN2 0 0 The programmable reference counter for the IF-PLL. 1 0 The programmable reference counter for the RF-PLL. 0 1 The programmable counter and the swallow counter for the IF-PLL 1 1 The programmable counter and the swallow counter for the RF-PLL Shift Register Configuration Programmable Reference Counter MSB LSB Data Flow 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 C N 1 C N 2 T 1 T 2 R 1 R 2 R 3 R 4 R 5 R 6 R 7 R 8 R 9 R 10 R 11 R 12 R 13 R 14 C S X X X X CN1, 2 : Control bit R1 to R14 : Divide ratio setting bits for the programmable reference counter (3 to 16,383) T1, 2 : LD/fout output setting bit CS : Charge pump current select bit X : Dummy bits(Set "0" or "1") NOTE: Data input with MSB first. 8 [Table. 1] [Table. 2] [Table. 3] [Table. 8] Jun. 2001 Edition 0.2 MB15F76UL Programmable Counter LSB MSB Data Flow 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 C N 1 C N 2 L D S S W F C A 1 A 2 A 3 A 4 A 5 N 1 N 2 N 3 N 4 N 5 N 6 N 7 N 8 N 9 N 10 N 11 N 12 N 13 IF/RF IF/RF CN1, 2 N1 to N13 A1 to A5 SWIF/RF : Control bit : Divide ratio setting bits for the programmable counter (3 to 8,191) : Divide ratio setting bits for the swallow counter (0 to 31) : Divide ratio setting bit for the prescaler (4/5 or 8/9 for the SW IF , 16/17 or 32/33 for the SWRF) FC IF/RF : Phase control bit for the phase detector(IF : FC IF, RF : FC RF) LDS : LD/fout signal select bit NOTE: Data input with MSB first. [Table. [Table. [Table. [Table. 1] 4] 5] 6] [Table. 7] [Table. 3] Table2. Binary 14-bit Programmable Reference Counter Data Setting Divide ratio (R) R 14 R 13 R 12 R 11 R 10 R 9 R 8 R 7 R 6 R 5 R 4 R 3 R 2 R 1 3 0 0 0 0 0 0 0 0 0 0 0 0 1 1 4 0 0 0 0 0 0 0 0 0 0 0 1 0 0 ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ 16383 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Note: • Divide ratio less than 3 is prohibited. Table.3 LD/fout output Selectable Bit Setting LD/fout pin state LDS T1 T2 0 0 0 0 1 0 0 1 1 frIF 1 0 0 fr RF 1 1 0 fpIF 1 0 1 fp RF 1 1 1 LD output fout output 9 Jun. 2001 Edition 0.2 MB15F76UL Table.4 Binary 13-bit Programmable Counter Data Setting Divide ratio (N) N 13 N 12 N 11 N 10 N 9 N 8 N 7 N 6 N 5 N 4 N 3 N 2 N 1 3 0 0 0 0 0 0 0 0 0 0 0 1 1 4 0 0 0 0 0 0 0 0 0 0 1 0 0 ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ 8191 1 1 1 1 1 1 1 1 1 1 1 1 1 Note: • Divide ratio less than 3 is prohibited. Table.5 Binary 5-bit Swallow Counter Data Setting Divide ratio (N) A 5 A 4 A 3 A 2 A 1 0 0 0 0 0 0 1 0 0 0 0 1 ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ 31 1 1 1 1 1 Note: • Divide ratio (A) range = 0 to 31 Table. 6 Prescaler Data Setting Prescaler divide ratio SW = ”1” SW = ”0” IF-PLL 4/5 8/9 RF-PLL 16/17 32/33 Table. 7 Phase Comparator Phase Switching Data Setting FC IF,RF = 1 FC IF,RF = 0 1 DoIF,RF fr > fp H L fr = fp Z Z fr < fp L H VCO polarity 1 2 Note: • Z = High–impedance • Depending upon the VCO and LPF polarity, FC bit should be set. 10 VCO Output Frequency 2 VCO Input Voltage Jun. 2001 Edition 0.2 MB15F76UL Table. 8 Charge Pump Current Setting CS Current value 1 + 6.0 mA 0 + 1.5 mA 4. Power Saving Mode (Intermittent Mode Control Circuit) Table 9. PS Pin Setting PS pin Status H Normal mode L Power saving mode The intermittent mode control circuit reduces the PLL power consumption. By setting the PS pin low, the device enters into the power saving mode, reducing the current consumption. See the Electrical Characteristics chart for the specific value. The phase detector output, Do, becomes high impedance. For the single PLL, the lock detector, LD, remains high, indicating a locked condition. For the dual PLL, the lock detector, LD, is as shown in the LD Output Logic table. Setting the PS pin high, releases the power saving mode, and the device works normally. The intermittent mode control circuit also ensures a smooth startup when the device returns to normal operation. When the PLL is returned to normal operation, the phase comparator output signal is unpredictable. This is because of the unknown relationship between the comparison frequency (fp) and the reference frequency (fr) which can cause a major change in the comparator output, resulting in a VCO frequency jump and an increase in lockup time. To prevent a major VCO frequency jump, the intermittent mode control circuit limits the magnitude of the error signal from the phase detector when it returns to normal operation. Note: When power (VCC ) is first applied, the device must be in standby mode, PS=Low, for at least 1µs. 11 Jun. 2001 Edition 0.2 MB15F76UL Note: • PS pin must be set at “L” for Power ON. OFF ON tv > 1µs Vcc Clock Data LE tps > 100ns PS (1) (2) (1) PS = L (power saving mode) at Power ON (2) Set serial data 1µs later after power supply remains stable(Vcc > 2.2V). (3) Relase power saving mode (PS: L → H) 100nS later after setting serial data. 12 (3) Jun. 2001 Edition 0.2 n MB15F76UL SERIAL DATA INPUT TIMING 1st data 2nd data Control bit Invalid data Data LSB MSB Clock LE t2 t1 t4 t3 t5 t7 t6 On the rising edge of the clock, one bit of data is transferred into the shift register. Parameter Min. t1 20 t2 Typ. Max. Unit Parameter Min. – – ns t5 100 20 – – ns t6 t3 30 – – ns t7 t4 30 – – ns Typ. Max. Unit – – ns 20 – – ns 100 – – ns Note: LE should be "L" when the data is transferred into the shift register. 13 Jun. 2001 Edition 0.2 MB15F76UL n PHASE DETECTOR OUTPUT WAVEFORM fr IF/RF fp IF/RF tWU tWL LD (FC bit = 1) H DoIF/RF Z L (FC bit = 0) DoIF/RF Z LD Output Logic Table IF–PLL section RF–PLL section LD output Locking state / Power saving state Locking state / Power saving state H Locking state / Power saving state Unlocking state L Unlocking state Locking state / Power saving state L Unlocking state Unlocking state L Note: • Phase error detection range = −2π to +2π • Pulses on DoIF/RF signals are output to prevent dead zone. • LD output becomes low when phase error is tW U or more. • LD output becomes high when phase error is t W L or less and continues to be so for three cycles or more. • tWU and tWL depend on OSCin input frequency as follows. tWU > 2/fosc: i.e. tW U > 200ns when foscin = 10 MHz tWL < 4/fosc: i.e. t W L < 400ns when foscin = 10 MHz 14 Jun. 2001 Edition 0.2 n MB15F76UL TEST CIRCUIT(Prescaler input/Programmable reference divider input sensitivity test) Controller S.G S.G 50Ω 1000pF 1000pF 50Ω 1000pF S.G GND OSCIN Clock Data finIF 1 XfinIF 2 GNDIF 3 VccIF VccIF 0.1µ (Divide ratio setting) 1000pF 16 LE 15 finRF 14 XfinRF 4 13 GNDRF PSIF 5 12 VccRF VpIF 6 11 PSRF VpIF 0.1µ 20 19 18 17 MB15F76UL MB15F74UL 7 8 9 10 DoIF LD/fout Do RF VpRF VpRF 50Ω 1000pF VccRF 0.1µ 0.1µ Oscilloscope 15 Jun. 2001 Edition 0.2 MB15F76UL n APPLICATION EXAMPLE 1000pF TCXO From controller GND OSCIN Clock Data 1000pF 1000pF 3.0V 0.1µ finIF 1 XfinIF 2 GNDIF 3 VccIF 20 19 18 17 16 LE 15 finRF 14 XfinRF 4 13 GND RF PSIF 5 12 VccRF VpIF 6 11 PSRF MB15F74UL MB15F76UL 7 8 9 10 1000pF 3.0V 0.1µ 3.0V 0.1µ 1000pF DoIF LD/fout DoRF VpRF 3.0V 0.1µ LPF VCO Output VCO Output Lock Det. LPF Clock, Data, LE: Schmitt trigger circuit is provided (insert a pull-down or pull-up resistor to prevent oscillation when open-circuited in the input). 16 Jun. 2001 Edition 0.2 n MB15F76UL PACKAGE DIMENSION 20 pin, Plastic BCC (LCC-20P-M05) * : These dimensions do not include resin protrusion. 17