ABV0205
Low Phase Noise VCXO (12MHz to 25MHz)
FEATURES
•
•
•
•
•
•
•
•
Low phase noise VCXO output for the 12MHz to
25MHz range (-135 dBc at 10kHz offset).
CMOS output.
12 to 25MHz crystal input.
Integrated variable capacitors.
Wide pull range (+/- 300 ppm).
Low jitter (RMS): 2.2ps period.
2.5 or 3.3V operation voltage.
Available in 8-Pin SOIC.
PIN CONFIGURATION
XOUT
N/C
VCON
GND
1
8
XIN
OE^
VDD
CLK
ABV0205
2
3
4
7
6
5
Note: ^ denotes internal pull up
DESCRIPTION
The ABV0205 is a low cost, high performance and
low phase noise VCXO, providing less than -135dBc
at 10 kHz offset in the 12MHz to 25MHz operating
range. The very low jitter (2.2ps RMS period jitter)
makes this chip ideal for applications requiring volt-
age controlled frequency sources. Input crystal can
range from 12 to 25MHz (fundamental resonant
mode).
OUTPUT RANGE
MULTIPLIER
No PLL
FREQUENCY
RANGE
12 - 25MHz
OUTPUT
BUFFER
CMOS
BLOCK DIAGRAM
VCO
Divider
Reference
Divider
Phase
Comparator
Charge
Pump
Loop
Filter
VCO
CLK
XIN
XOUT
XTAL
OSC
VARICAP
OE
VCON
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001
www.Abracon.com
03/21/05 Page 1
ABV0205
Low Phase Noise VCXO (12MHz to 25MHz)
PIN DESCRIPTIONS
Name
XOUT
N/C
VCON
GND
CLK
VDD
OE
XIN
Number
1
2
3
4
5
6
7
8
Type
I
-
I
P
O
P
I
I
Not connected.
Voltage Control input.
Ground.
Output clock.
VDD power supply pin.
Description
Crystal output. See Crystal Specifications on page 3.
Output Enable input. Disables the output when low. Internal pull-up enables
output by default if pin is not connected to low.
Crystal input. See Crystal Specifications on page 3.
ELECTRICAL SPECIFICATIONS
1. Absolute Maximum Ratings
PARAMETERS
Supply Voltage
Input Voltage, dc
Output Voltage, dc
Storage Temperature
Ambient Operating Temperature*
Junction Temperature
Lead Temperature (soldering, 10s)
ESD Protection, Human Body Model
SYMBOL
V
DD
V
I
V
O
T
S
T
A
T
J
MIN.
-0.5
-0.5
-65
-40
MAX.
4.6
V
DD
+0.5
V
DD
+0.5
150
85
125
260
2
UNITS
V
V
V
°C
°C
°C
°C
kV
Exposure of the device under conditions beyond the limits specified by Maximum Ratings for extended periods may cause permanent damage to the
device and affect product reliability. These conditions represent a stress rating only, and functional operations of the device at these or any other
conditions above the operational limits noted in this specification is not implied.
*
Note:
Operating Temperature is guaranteed by design for all parts (COMMERCIAL and INDUSTRIAL), but tested for COMMERCIAL grade only.
2. DC Electrical Specifications
PARAMETERS
Supply Current, Dynamic, with
Loaded Outputs
Operating Voltage
Output drive current
Short Circuit Current
VCXO Control Voltage
SYMBOL
I
DD
V
DD
I
OH
I
OL
VCON
CONDITIONS
F
XIN
= 12 - 25MHz
Output load of 10pF
V
OH
= V
DD
-0.4V, V
DD
=3.3V
V
OL
= 0.4V, V
DD
= 3.3V
MIN.
TYP.
16
MAX.
20
3.63
UNITS
mA
V
mA
mA
mA
V
2.25
10
10
±50
0
V
DD
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001
www.Abracon.com
03/21/05 Page 2
ABV0205
Low Phase Noise VCXO (12MHz to 25MHz)
3. AC Electrical Specifications
PARAMETERS
Input Crystal Frequency
Output Clock Rise/Fall Time
Output Clock Duty Cycle
SYMBOL
CONDITIONS
0.3V ~ 3.0V with 15 pF load
Measured @ 50% V
DD
MIN.
12
45
TYP.
2.4
50
MAX.
25
55
UNITS
MHz
ns
%
4. Voltage Control Crystal Oscillator (3.3V)
PARAMETERS
VCXO Stabilization Time *
VCXO Tuning Range
CLK output pullability
VCXO Tuning Characteristic
Pull range linearity
VCON pin input impedance
VCON modulation BW
SYMBOL
T
VCXOSTB
CONDITIONS
From power valid
F
XIN
= 12 – 25MHz;
XTAL C
0
/C
1
< 250
0V
≤
VCON
≤
3.3V
VCON=1.65V,
±1.65V
MIN.
TYP.
MAX.
10
UNITS
ms
ppm
ppm
ppm/V
%
kΩ
kHz
500
±200
150
10
2000
25
0V
≤
VCON
≤
3.3V, -3dB
Note:
Parameters denoted with an asterisk (*) represent nominal characterization data and are not production tested to any specific limits.
5. Jitter and Phase Noise Specification
PARAMETERS
RMS Period Jitter
(1 sigma – 1000 samples)
Phase Noise relative to carrier
Phase Noise relative to carrier
Phase Noise relative to carrier
Phase Noise relative to carrier
Phase Noise relative to carrier
CONDITIONS
with capacitive decoupling between
VDD and GND.
25MHz @100Hz offset
25MHz @1kHz offset
25MHz @10kHz offset
25MHz @100kHz offset
25MHz @1MHz offset
MIN.
TYP.
2.2
-95
-120
-142
-150
-150
MAX.
UNITS
ps
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
6. Crystal Specifications
PARAMETERS
Crystal Resonator Frequency
Crystal Loading Capacitance Rating
C0/C1
ESR
SYMBOL
F
XIN
C
L
(xtal)
R
S
MIN.
12
TYP.
9.5
MAX.
25
250
30
UNITS
MHz
pF
-
Ω
Note:
Crystal Loading rating: 9.5pF is the loading the crystal sees from the VCXO chip at VCON = 1.65V. It is assumed that the crystal will be at
nominal frequency at this load. If the crystal requires more load to be at nominal frequency, the additional load must be added externally.
This however may reduce the pull range.
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001
www.Abracon.com
03/21/05 Page 3
ABV0205
Low Phase Noise VCXO (12MHz to 25MHz)
PACKAGE INFORMATION
8 PIN ( dimensions in mm )
Narrow SOIC
Symbol
A
A1
B
C
D
E
H
L
e
Min.
1.47
0.10
0.33
0.19
4.80
3.80
5.80
0.38
Max.
1.73
0.25
0.51
0.25
4.95
4.00
6.20
1.27
1.27 BSC
B
e
A
1
C
L
A
D
E
H
ORDERING INFORMATION
For part ordering, please contact our Sales Department:
30332 Esperanza., Rancho Santa Margarita, Ca 92688
Ph: 949-546-8000 Fax: 949-546-8001
PART NUMBER
The order number for this device is a combination of the following:
Device number, Package type and Operating temperature range
ABV0205 S C
Part Number
Temperature
C= Commercial
Package
S=SOIC
Order Number
ABV0205SC
ABV0205SC-T
Marking
ABV0205SC
ABV0205SC
Package Option
8-Pin SOIC (Tube)
8-Pin SOIC (Tape and Reel)
Abracon Corporation, reserves the right to make changes in its products or specifications, or both at any time without notice. The information fur-
nished by Abracon is believed to be accurate and reliable. However, Abracon makes no guarantee or warranty concerning the accuracy of said infor-
mation and shall not be responsible for any loss or damage of whatever nature resulting from the use of, or reliance upon this product.
LIFE SUPPORT POLICY:
Abracon’s products are not authorized for use as critical components in life support devices or systems without the express
written approval of the President of Abracon Corporation.
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001
www.Abracon.com
03/21/05 Page 4
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