1 (5)
DA1174.001
6 February, 2001
MAS1174
IC FOR 10.00 30.00 MHz VCXO
Low Power
Wide Supply Voltage Range
True Sine Wave Output
Very High Level of Integration
Electrically Trimmable
Very Low Phase Noise
Low Cost
DESCRIPTION
The MAS1174 is an integrated circuit well suited to
build VCXO for mobile communication. The trimming
is done by a serial bus and the calibration
information is stored in an internal PROM.To build a
VCXO only two additional components, a varactor
and a crystal are needed. The compensation
method is fully analog. IC compensation work is
continuous without generating any steps or other
interferences.
FEATURES
APPLICATIONS
Very small size
Minor current draw
Wide operating temperature range
Phase noise <-130 dBc/Hz at 1 kHz offset
VCXO to mobile phones
VCXO to other telecommunications systems
BLOCK DIAGRAM
This is preliminary information on a
new product under development.
Micro Analog Systems Oy reserves
the right to make any changes
without notice.
DA
CLK
PV
VSS
VC
VDD
X1
OUT
X2
C1
D1
XO1
Digital
MAS1174
5
2
2
2 (5)
DA1174.001
6 February, 2001
PIN DESCRIPTION
Pin Description
Symbol
x-coordinate
y-coordinate
Power Supply Voltage
VDD
190
1048
Serial Bus Data Input
DA
394
1040
Serial Bus Clock Input
CLK
669
1040
Programming Input
PV
909
1044
Voltage Control Input
VC
183
228
Crystal Oscillator Output
X1
390
228
Power Supply Ground
VSS
587
245
Crystal/Varactor Oscillator Input
X2
801
228
Buffer Output
OUT
1009
228
Note: Because the substrate of the die is internally connected to VDD, the die has to be connected to VDD or left
floating. Please make sure that VDD is the first pad to be bonded. Pick-and-place and all component assembly are
recommended to be performed in ESD protected area.
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Min
Max
Unit
Note
Supply Voltage
V
DD
- V
SS
-0.3
6.0
V
Input Voltage
V
IN
V
SS
-0.3
V
DD
+ 0.3
V
1)
Power Dissipation
P
MAX
100
mW
Operating Temperature
T
OP
-35
85
o
C
Storage Temperature
T
ST
-40
120
o
C
Note: Not valid for programming pin PV.
RECOMMENDED OPERATION CONDITIONS
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Supply Voltage
V
DD
2.7
2.8
5.5
V
Supply Current
I
CC
Vcc = 2.8 Volt
1.8
mA
Operable Temperature
T
C
-30
+85
o
C
3 (5)
DA1174.001
6 February, 2001
ELECTRICAL CHARACTERISTICS
Parameter
Symbol
Min
Typ
Max
Unit
Note
Frequency range
f
o
10.00
30.00
MHz
Voltage Control Range
V
C
0
Vdd
Voltage Control Sensitivity
V
CSENS
10..30
ppm/V
1)
Output Voltage (10k
// 10 pF)
V
out
1.0
Vpp
Compensation CDAC1 (2 Bit)
C
X1
C10
C10 + 4.5
pF
2)
Compensation CDAC2 (4 Bit)
C
X2
C20
C20 + 18
pF
3)
Startup Time
T
START
2
ms
Note 1: programmable by DN/DP
Note 2: typ C10 = 4.5 pF (varactor capacitance has to be added)
Note 3: typ C20 = 12.5 pF
IC OUTLINES
VDD
OUT
X2
VSS
X1
VC
DA
CLK
PV
MAS1174
1278 m
1200
m
4 (5)
DA1174.001
6 February, 2001
SAMPLES IN SB20 DIL PACKAGE
MAS1174
YYWW
XXXXX.X
2
1
20
3
4
5
6
7
8
9
10
19
18
17
16
15
14
13
12
11
VC
X1
GND
X2
OUT
VDD
DA
CLK
PV
Top marking:
YYWW = Year, Week
XXXXX.X = Lot number
5 (5)
DA1174.001
6 February, 2001
ORDERING INFORMATION
Product Code
Product
Package
Comments
MAS1174ATC1
IC FOR VCXO
Wafer, EWS tested
Die size 1200 x 1278 m,
wafer thickness 400 m
MAS1174
IC FOR VCXO
SMD Package T.B.D.
Please contact Micro Analog Systems Oy for other wafer thickness options.
LOCAL DISTRIBUTOR
MICRO ANALOG SYSTEMS OY CONTACTS
Micro Analog Systems Oy
Kamreerintie 2, P.O. Box 51
FIN-02771 Espoo, FINLAND
http://www.mas-oy.com
Tel. (09) 80 521
Tel. Int. +358 9 80 521
Telefax +358 9 805 3213
Email: info@mas-oy.com
NOTICE
Micro Analog Systems Oy reserves the right to make changes to the products contained in this data sheet in order to improve the design
or performance and to supply the best possible products. Micro Analog Systems Oy assumes no responsibility for the use of any circuits
shown in this data sheet, conveys no license under any patent or other rights unless otherwise specified in this data sheet, and makes
no claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only
and Micro Analog Systems Oy makes no claim or warranty that such applications will be suitable for the use specified without further
testing or modification.
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