NPC CF5074A-1 Vcxo module ic with built-in varicap Datasheet

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
■
■
■
■
■
■
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
■
■
■
■
15pF output load
Standby function
• High impedance in standby mode
BiCMOS process
Chip form (CF5074A)
APPLICATIONS
■
VCXO modules
ORDERING INFORMATION
Device
CF5074A−1
CF5074A−3
Package
Chip form
SEIKO NPC CORPORATION —1
CF5074A
PAD LAYOUT
(Unit: µm)
(1070,1270)
XT
5
VC
6
INHN
7
TESN
8
VSS
4
XTN
3
VDD
2
Q
DA5074
1
(0,0)
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.
Name
I/O
1
VSS
–
2
Q
3
VDD
4
5
Pad dimensions [µm]
Description
X
Y
(−) supply pin
111
111
O
Output pin. High-impedance in standby mode
958
111
–
(+) supply pin
958
567
XTN
O
Oscillator output. Crystal connection pin
930
1104
XT
I
Oscillator input. Crystal connection pin
140
1104
6
VC
I
Oscillation frequency control voltage input pin.
Positive polarity (frequency increases with increasing voltage)
140
932
7
INHN
I
Output state control voltage input pin.
Standby mode when LOW. Power-saving pull-up resistor built-in
140
734
8
TESN
I
Test pin (leave open)
140
547
BLOCK DIAGRAM
XTN
VDD
Oscillator
Detection
XT
RVC3
VC
CMOS
Output Buffer
RVC1
CVC1
RUP
RVC2
CVC2
Q
VSS
INHN
SEIKO NPC CORPORATION —2
CF5074A
ABSOLUTE MAXIMUM RATINGS
VSS = 0V unless otherwise noted.
Parameter
Symbol
Rating
Unit
Supply voltage range
VDD
−0.5 to 7.0
V
Input voltage range
VIN
−0.5 to VDD + 0.5
V
Output voltage range
VOUT
−0.5 to VDD + 0.5
V
Storage temperature range
TSTG
−65 to +150
°C
Output current
IOUT
20
mA
RECOMMENDED OPERATING CONDITIONS
VSS = 0V unless otherwise noted.
Rating
Parameter
Symbol
Unit
Min
Typ
Max
Operating supply voltage
VDD
2.25
–
3.6
V
Output frequency
fOUT
50
–
80
MHz
Output load capacitance
CL
–
–
15
pF
Input voltage
VIN
VSS
–
VDD
V
TOPR
–40
+25
+85
°C
Operating temperature
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
Unit
Min
Typ
Max
VDD = 2.25 to 2.75V
–
20
30
mA
VDD = 3.0 to 3.6V
–
26
36
mA
IDD
Measurement circuit 2,
load circuit 1, INHN = open,
CL = 15pF, f = 80MHz
HIGH-level output voltage
VOH
Q: Measurement circuit 1, IOH = –4mA
VDD – 0.4
VDD – 0.2
–
V
LOW-level output voltage
VOL
Q: Measurement circuit 1, IOL = 4mA
–
0.2
0.4
V
VOH = VDD
–
–
10
µA
VOL = VSS
–
–
10
µA
Current consumption
IZ
Q: Measurement circuit 6,
INHN = LOW
HIGH-level input voltage
VIH
INHN
0.7VDD
–
–
V
LOW-level input voltage
VIL
INHN
–
–
0.3VDD
V
INHN = VSS
0.4
0.8
1.2
MΩ
INHN = 0.7VDD
15
–
150
kΩ
75
150
225
kΩ
75
150
225
kΩ
10
30
90
kΩ
VC = 0.3V
13
16.3
19.6
pF
VC = 1.65V
6.7
8.9
10.9
pF
VC = 3.0V
3.3
4.7
6.1
pF
Output leakage current
INHN pull-up resistance
RUP1
Measurement circuit 3
RUP2
RVC1
Oscillator block built-in
resistance
RVC2
Measurement circuit 4
RVC3
Oscillator block built-in
capacitance
CVC
Capacitance of CVC1 and
CVC2
VC input resistance
RVIN
Measurement circuit 7, Ta = 25°C
10
–
–
MΩ
VC input impedance
ZVIN
Measurement circuit 8, VC = 0V, f = 10kHz, Ta = 25°C
–
250
–
kΩ
VC input capacitance
CVIN
Measurement circuit 8, VC = 0V, f = 10kHz, Ta = 25°C
–
60
–
pF
Modulation bandwidth
fm
Measurement circuit 9, –3dB frequency, VDD = 3.3V,
VC = 3.3Vp-p, Ta = 25°C, crystal: f = 80MHz,
C0 = 4.8pF, γ ≤ 440
–
30
–
kHz
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
Unit
Min
Typ
Max
Output rise time
tr1
Measurement circuit 2, load circuit 1,
0.2VDD → 0.8VDD, Ta = 25°C, CL = 15pF
–
2.5
4
ns
Output fall time
tf1
Measurement circuit 2, load circuit 1,
0.8VDD → 0.2VDD, Ta = 25°C, CL = 15pF
–
2.5
4
ns
VDD = 2.5V
40
50
60
%
VDD = 3.3V
45
50
55
%
–
–
100
ns
–
–
100
ns
Output duty cycle
Duty
Output disable delay time
tPLZ
Output enable delay time
tPZL
Measurement circuit 2,
load circuit 1, Ta = 25°C,
CL = 15pF
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
Q
Oscillator
HIGH (or open)
fO
Operating
LOW
High impedance
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
When measuring VOL
VDD
XT
VDD
VC
XTN
When measuring VOH
INHN
Q
VC
VXTN V
TESN
VSS
A
VSS
V
IXTN A
VDD
RVC1 =
(VDD − VXTN)
IXT
RVC2 =
(VDD − VXT)
IXTN
RVC3 =
VXTN
IXT
XT
Measurement Circuit 2
XTN
VC
VXT V
VSS
A
VDD
XT
INHN
X'tal
Measurement Circuit 5
XTN
Q
VC
VSS
VC = 0.5VDD, INHN = open, crystal oscillation
Signal
Generator
VDD
(VR UP = VSS)
IRUP
(VDD − 0.7VDD)
(VR UP = 0.7VDD)
RUP2 =
IRUP
VDD
A
INHN
IRUP
VC
VSS
VDD
XT
VC
R1
Measurement Circuit 3
RUP1 =
C1
INHN
Q
VSS
XT input signal: 10MHz, 1.0Vp-p
C1 = 0.001µF, R1 = 50Ω, VC = 0.5VDD
Measurement Circuit 6
V
VRUP
VDD
INHN
VC = 0.5VDD
Q
VC
A
VSS
VC = 1/2VDD
SEIKO NPC CORPORATION —6
CF5074A
Measurement Circuit 7
RVC =
VDD
IVC
Measurement Circuit 9
VDD
IVC A
VC
VSS
Gain-phase
Analyzer
(HP4194A)
Modulaiton
Analyzer
(HP8901B)
Modulation
signal
R1
C1
VC
VDD
R2
XT
X'tal
Demodulation
signal
XTN
Q
VSS
C1 = 20µF, R1 = R2 = 100MΩ, VDD = 3.3V
VC modulation signal: 100Hz to 100kHz, 3.3Vp-p
Measurement Circuit 8
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
Q output
0.8V DD
0.8V DD
0.2V DD
0.2V DD
DUTY measurement
voltage (0.5V DD )
TW
tr
tf
Output duty cycle
DUTY measurement
voltage (0.5V DD)
Q output
TW
DUTY= TW/ T
T
100 (%)
Output Enable/Disable Delay Times
INHN
VIH
VIL
tPZL
tPLZ
Q output
INHN input waveform 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: [email protected]
NC0318BE
2006.04
SEIKO NPC CORPORATION —9
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