ABV0202
Low Phase Noise VCXO (24MHz to 50MHz)
FEATURES
•
•
•
•
•
•
•
•
•
Low phase noise VCXO output for the 24MHz to
50MHz range (-130 dBc at 10kHz offset).
CMOS output.
12 to 25MHz crystal input.
Integrated variable capacitors.
Selectable High Drive (30mA) or Standard Drive
(10mA) output.
Wide pull range (+/- 250 ppm typ.).
Low jitter (RMS): 3ps period (1 sigma).
3.3V operation.
Available in 8-Pin SOIC.
PIN CONFIGURATION
XOUT
N/C
VCON
GND
1
8
XIN
N/C
VDD
CLK
ABV0202
2
3
4
7
6
5
DESCRIPTION
The ABV0202 is a low cost, high performance, low
phase noise VCXO, providing less than -130dBc at
10kHz offset in the 24MHz to 50MHz operating
range. The very low jitter (3 ps 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
x2
FREQUENCY
RANGE
24 - 50MHz
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
03/11/05 Page 1
ABV0202
Low Phase Noise VCXO (24MHz to 50MHz)
PIN DESCRIPTIONS
Name
XOUT
N/C
VCON
GND
CLK
VDD
XIN
Number
1
2,7
3
4
5
6
8
Type
I
-
I
P
O
P
I
Not connected.
Voltage Control input.
Ground.
Output clock.
+3.3V power supply.
Description
Crystal output. See Crystal Specifications on page 3.
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 Specifications
PARAMETERS
Supply Current, Dynamic, with
Loaded Outputs
Operating Voltage
Output drive current
(High Drive)
Output drive current
(Standard Drive)
Short Circuit Current
VCXO Control Voltage
VCON
0
SYMBOL
I
DD
V
DD
I
OH
I
OL
I
OH
I
OL
CONDITIONS
F
XIN
= 12 - 25MHz
Output load of 10pF
MIN.
TYP.
16
MAX.
20
3.63
UNITS
mA
V
mA
mA
mA
mA
2.97
V
OH
= V
DD
-0.4V, V
DD
=3.3V
V
OL
= 0.4V, V
DD
= 3.3V
V
OH
= V
DD
-0.4V, V
DD
=3.3V
V
OL
= 0.4V, V
DD
= 3.3V
30
30
10
10
±50
mA
3.3
V
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001
www.Abracon.com
03/11/05 Page 2
ABV0202
Low Phase Noise VCXO (24MHz to 50MHz)
3. AC Electrical Specifications
PARAMETERS
Input Crystal Frequency
Output Clock Rise/Fall Time
(Standard Drive)
Output Clock Rise/Fall Time
(High Drive)
Output Clock Duty Cycle
0.3V ~ 3.0V with 15 pF load
0.3V ~ 3.0V with 15 pF load
Measured @ 50% V
DD
45
SYMBOL
CONDITIONS
MIN.
12
TYP.
MAX.
25
UNITS
MHz
2.4
ns
1.2
50
55
%
4. Voltage Control Crystal Oscillator
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
165
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
at 44MHz, with capacitive decoup-
ling between VDD and GND.
44MHz @100Hz offset
44MHz @1kHz offset
44MHz @10kHz offset
44MHz @100kHz offset
44MHz @1MHz offset
MIN.
TYP.
3
-100
-123
-130
-125
-125
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
03/11/05 Page 3
ABV0202
Low Phase Noise VCXO (24MHz to 50MHz)
PACKAGE INFORMATION
8 PIN SOIC (in mm)
Symbol
A
A1
B
C
D
E
H
L
e
Min.
Max.
1.47
1.73
0.10
0.25
0.33
0.51
0.19
0.25
4.80
4.95
3.80
4.00
5.80
6.20
0.38
1.27
1.27 BSC
E
H
D
A
A1
e
B
C
L
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
ABV0202 (H)X C
PART NUMBER
Optional High Drive
TEMPERATURE
C=COMMERCIAL
I=INDUSTRIAL
PACKAGE TYPE
S=SOIC
Order Number
ABV0202SC
ABV0202SC -T
ABV0202HSC
ABV0202HSC -T
Marking
ABV0202SC
ABV0202SC
ABV0202HSC
ABV0202HSC
Package Option
SOIC
SOIC
SOIC
SOIC
(Tube)
(Tape and Reel)
(Tube)
(Tape and Reel)
8-Pin
8-Pin
8-Pin
8-Pin
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
03/11/05 Page 4
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