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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: m)
(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 x 1.27mm Chip thickness: 300 30m (CF5074A-1) 180 20m (CF5074A-3) PAD size: 100 x 100m (TESN: 80 x 80m) 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 [m] 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 +85C 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 = 25C Measurement circuit 8, VC = 0V, f = 10kHz, Ta = 25C Measurement circuit 8, VC = 0V, f = 10kHz, Ta = 25C Measurement circuit 9, -3dB frequency, VDD = 3.3V, VC = 3.3Vp-p, Ta = 25C, crystal: f = 80MHz, C0 = 4.8pF, 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 A A V V M k k k k pF pF pF M k 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 +85C 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 = 25C, CL = 15pF Measurement circuit 2, load circuit 1, 0.8VDD 0.2VDD, Ta = 25C, CL = 15pF Measurement circuit 2, load circuit 1, Ta = 25C, 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 = 25C, 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 (VRUP = VSS) IRUP (VDD - 0.7VDD) (VRUP = 0.7VDD) RUP2 = IRUP RUP1 = INHN
XT input signal: 10MHz, 1.0Vp-p C1 = 0.001F, R1 = 50, 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 = 20F, R1 = R2 = 100M, 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 0.8VDD 0.2VDD TW 0.8VDD 0.2VDD DUTY measurement voltage (0.5V DD)
Q output
tr
Output duty cycle
tf
Q output
TW T
DUTY measurement voltage (0.5VDD)
DUTY= TW/ T
100 (%)
Output Enable/Disable Delay Times
INHN
VIH VIL
tPLZ Q output
INHN input waveform
tPZL
tr = tf
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

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