CF5074A

CF5074A VCXO Module IC with Built-in Varicap OVERVIEW The CF5074A is VCXO module IC with built-in varicap diodes. The integrated varicap diode BiCMOS process allows the device to be fabricated on a single chip. A newly developed oscillator circuit features reduced drive level of crystal and wide pullrange. A VCXO module can be constructed with just the connection of a crystal unit, making the devices ideal as surface-mounted, compact VCXO modules. FEATURES I I I I I I 2.25 to 3.6V operating supply voltage range 50MHz to 80MHz operating frequency range Varicap diode built-in Oscillation start-up detector function CMOS output duty level 4mA (min) output drive capability I I I I 15pF output load Standby function • High impedance in standby mode BiCMOS process Chip form (CF5074A) APPLICATIONS I VCXO modules ORDERING INFORMATION Device CF5074A−1 CF5074A−3 Package Chip form SEIKO NPC CORPORATION —1 CF5074A PAD LAYOUT (Unit: µm) (1070,1270) XT VC INHN TESN 5 6 7 8 4 XTN 3 DA5074 VDD VSS (0,0) 1 2 Q Chip size: 1.07 × 1.27mm Chip thickness: 300 ± 30µm (CF5074A-1) 180 ± 20µm (CF5074A-3) PAD size: 100 × 100µm (TESN: 80 × 80µm) Chip base: VSS potential PAD DESCRIPTION AND DIMENSIONS Pad No. 1 2 3 4 5 6 7 8 Name VSS Q VDD XTN XT VC INHN TESN I/O – O – O I I I I (−) supply pin Output pin. High-impedance in standby mode (+) supply pin Oscillator output. Crystal connection pin Oscillator input. Crystal connection pin Oscillation frequency control voltage input pin. Positive polarity (frequency increases with increasing voltage) Output state control voltage input pin. Standby mode when LOW. Power-saving pull-up resistor built-in Test pin (leave open) Description Pad dimensions [µm] X 111 958 958 930 140 140 140 140 Y 111 111 567 1104 1104 932 734 547 BLOCK DIAGRAM XTN VDD XT RVC3 Oscillator Detection VC RVC1 CVC1 RUP RVC2 CVC2 CMOS Output Buffer Q VSS INHN SEIKO NPC CORPORATION —2 CF5074A ABSOLUTE MAXIMUM RATINGS VSS = 0V unless otherwise noted. Parameter Supply voltage range Input voltage range Output voltage range Storage temperature range Output current Symbol VDD VIN VOUT TSTG IOUT Rating −0.5 to 7.0 −0.5 to VDD + 0.5 −0.5 to VDD + 0.5 −65 to +150 20 Unit V V V °C mA RECOMMENDED OPERATING CONDITIONS VSS = 0V unless otherwise noted. Rating Parameter Operating supply voltage Output frequency Output load capacitance Input voltage Operating temperature Symbol Min VDD fOUT CL VIN TOPR 2.25 50 – VSS –40 Typ – – – – +25 Max 3.6 80 15 VDD +85 V MHz pF V °C Unit SEIKO NPC CORPORATION —3 CF5074A ELECTRICAL CHARACTERISTICS VDD = 2.25 to 3.6V, VC = 0.5VDD, VSS = 0V, Ta = –40 to +85°C unless otherwise noted. Rating Parameter Symbol Conditions Min Current consumption HIGH-level output voltage LOW-level output voltage Output leakage current HIGH-level input voltage LOW-level input voltage INHN pull-up resistance IDD VOH VOL IZ VIH VIL RUP1 RUP2 RVC1 Oscillator block built-in resistance RVC2 RVC3 VC = 0.3V Oscillator block built-in capacitance CVC Capacitance of CVC1 and CVC2 VC = 1.65V VC = 3.0V VC input resistance VC input impedance VC input capacitance Modulation bandwidth RVIN ZVIN CVIN fm Measurement circuit 7, Ta = 25°C Measurement circuit 8, VC = 0V, f = 10kHz, Ta = 25°C Measurement circuit 8, VC = 0V, f = 10kHz, Ta = 25°C Measurement circuit 9, –3dB frequency, VDD = 3.3V, VC = 3.3Vp-p, Ta = 25°C, crystal: f = 80MHz, C0 = 4.8pF, γ ≤ 440 Measurement circuit 4 Measurement circuit 2, load circuit 1, INHN = open, CL = 15pF, f = 80MHz VDD = 2.25 to 2.75V VDD = 3.0 to 3.6V – – VDD – 0.4 – – – 0.7VDD – INHN = VSS INHN = 0.7VDD 0.4 15 75 75 10 13 6.7 3.3 10 – – – Typ 20 26 VDD – 0.2 0.2 – – – – 0.8 – 150 150 30 16.3 8.9 4.7 – 250 60 30 Max 30 36 – 0.4 10 10 – 0.3VDD 1.2 150 225 225 90 19.6 10.9 6.1 – – – – mA mA V V µA µA V V MΩ kΩ kΩ kΩ kΩ pF pF pF MΩ kΩ pF kHz Unit Q: Measurement circuit 1, IOH = –4mA Q: Measurement circuit 1, IOL = 4mA Q: Measurement circuit 6, INHN = LOW INHN INHN Measurement circuit 3 VOH = VDD VOL = VSS SEIKO NPC CORPORATION —4 CF5074A SWITCHING CHARACTERISTICS VDD = 2.25 to 3.6V, VC = 0.5VDD, VSS = 0V, Ta = –40 to +85°C unless otherwise noted. Rating Parameter Symbol Conditions Min Output rise time Output fall time tr1 tf1 Measurement circuit 2, load circuit 1, 0.2VDD → 0.8VDD, Ta = 25°C, CL = 15pF Measurement circuit 2, load circuit 1, 0.8VDD → 0.2VDD, Ta = 25°C, CL = 15pF Measurement circuit 2, load circuit 1, Ta = 25°C, CL = 15pF VDD = 2.5V VDD = 3.3V – – 40 45 – – Typ 2.5 2.5 50 50 – – Max 4 4 60 55 100 100 ns ns % % ns ns Unit Output duty cycle Output disable delay time Output enable delay time Duty tPLZ tPZL Measurement circuit 5, load circuit 1, Ta = 25°C, CL ≤ 15pF FUNCTIONAL DESCRIPTION Standby Function When INHN goes LOW, the device is in standby mode. The Q output becomes high impedance and the oscillator circuit continues running. INHN HIGH (or open) LOW Q fO High impedance Oscillator Operating Operating Power-saving Pull-up Resistor The INHN pin pull-up resistance changes in response to the input level (HIGH or LOW). When INHN is tied LOW, the pull-up resistance becomes large, reducing the current consumed by the resistance. When INHN is left open, the pull-up resistance becomes small, such that even if the input is affected by external noise the outputs are stable due to INHN being tied HIGH by the pull-up resistor. Oscillation Start-up Detector Function The devices also feature an oscillation start-up detector circuit. This circuit functions to disable the outputs until the oscillation starts. This prevents unstable oscillator output at oscillator start-up when power is applied. SEIKO NPC CORPORATION —5 CF5074A MEASUREMENT CIRCUITS Measurement Circuit 1 Measurement Circuit 4 IXT A VDD XT XTN When measuring VOL VC VDD When measuring VOH INHN TESN VSS Q VXTN V VC VSS RVC1 = RVC2 = RVC3 = A V (VDD − VXTN) IXT (VDD − VXT) IXTN VXTN IXT IXTN A XT VDD Measurement Circuit 2 VXT V XTN VC VSS A VDD XT X'tal XTN VC VSS Q INHN Measurement Circuit 5 VC = 0.5VDD, INHN = open, crystal oscillation Signal Generator C1 XT R1 VC VDD INHN Q Measurement Circuit 3 VSS VDD VDD (VR UP = VSS) IRUP (VDD − 0.7VDD) (VR UP = 0.7VDD) RUP2 = IRUP RUP1 = INHN XT input signal: 10MHz, 1.0Vp-p C1 = 0.001µF, R1 = 50Ω, VC = 0.5VDD A IRUP Measurement Circuit 6 VC VSS V VRUP VDD VC = 0.5VDD VC VSS INHN Q A VC = 1/2VDD SEIKO NPC CORPORATION —6 CF5074A Measurement Circuit 7 Measurement Circuit 9 RVC = VDD IVC IVC A VDD Gain-phase Analyzer (HP4194A) Modulaiton Analyzer (HP8901B) Modulation signal C1 R1 VC R2 VDD XT X'tal XTN VC VSS Demodulation signal Q VSS Measurement Circuit 8 C1 = 20µF, R1 = R2 = 100MΩ, VDD = 3.3V VC modulation signal: 100Hz to 100kHz, 3.3Vp-p Load Circuit 1 Q output VC Impedance Analyzer (HP4194A) CL (Including probe capacitance) VSS VC input signal: 100Hz to 10kHz, 0.1Vp-p, VC = 0V SEIKO NPC CORPORATION —7 CF5074A Switching Time Measurement Waveform Output duty level, tr, tf 0.8V DD 0.2V DD TW 0.8V DD 0.2V DD DUTY measurement voltage (0.5V DD ) Q output tr Output duty cycle tf Q output TW T DUTY measurement voltage (0.5V DD) DUTY= TW/ T 100 (%) Output Enable/Disable Delay Times INHN VIH VIL tPLZ Q output INHN input waveform tr = tf tPZL 10ns SEIKO NPC CORPORATION —8 CF5074A Please pay your attention to the following points at time of using the products shown in this document. The products shown in this document (hereinafter “Products”) are not intended to be used for the apparatus that exerts harmful influence on human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such use from SEIKO NPC CORPORATION (hereinafter “NPC”). Customers shall be solely responsible for, and indemnify and hold NPC free and harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties. Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document. Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products, and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies. SEIKO NPC CORPORATION 15-6, Nihombashi-kabutocho, Chuo-ku, Tokyo 103-0026, Japan Telephone: +81-3-6667-6601 Facsimile: +81-3-6667-6611 http://www.npc.co.jp/ Email: sales@npc.co.jp NC0318BE 2006.04 SEIKO NPC CORPORATION —9