Philips Semiconductors
Product specification
1GHz low-voltage Fractional-N synthesizer
SA7025
DESCRIPTION
The SA7025 is a monolithic low power, high performance dual
frequency synthesizer fabricated in QUBiC BiCMOS technology.
Featuring Fractional-N division with selectable modulo 5 or 8
implemented in the Main synthesizer to allow the phase detector
comparison frequency to be five or eight times the channel spacing.
This feature reduces the overall division ratio yielding a lower noise
floor and faster channel switching. The phase detectors and charge
pumps are designed to achieve phase detector comparison
frequencies up to 5MHz. A triple modulus prescaler (divide by
64/65/72) is integrated on chip with a maximum input frequency of
1.04GHz. Programming and channel selection are realized by a
high speed 3-wire serial interface.
PIN CONFIGURATION
DK Package
CLOCK
DATA
STROBE
V
SS
RF
IN
RF
IN
V
CCP
REF
IN
RA
AUX
IN
V
DD
TEST
LOCK
RF
RN
V
DDA
PHP
PHI
V
SSA
PHA
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
FEATURES
•
Operation up to 1.04GHz
•
Fast locking by “Fractional-N” divider
•
Auxiliary synthesizer
•
Digital phase comparator with proportional and integral charge
pump output
SR00600
•
High speed serial input
•
Low power consumption
•
Programmable charge pump currents
•
Supply voltage range 2.7 to 5.5V
•
Excellent input sensitivity: V
RF_IN
= –20dBm
APPLICATIONS
Figure 1. Pin Configuration
•
NADC (North American Digital Cellular)
•
PDC (Personal Digital Cellular)
•
Cellular radio
•
Spread-spectrum receivers
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic Shrink Small Outline Package (SSOP)
TEMPERATURE RANGE
–40 to +85°C
ORDER CODE
SA7025DK
DWG #
SOT266-1
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
V
IN
T
STG
T
A
PARAMETER
Supply voltage, V
DD
, V
DDA
, V
CCP
Voltage applied to any other pin
Storage temperature range
Operating ambient temperature range
RATING
-0.3 to +6.0
-0.3 to (V
DD
+ 0.3)
-65 to +150
-40 to +85
UNITS
V
V
°C
°C
NOTE:
Thermal impedance (θ
JA
) = 117°C/W. This device is ESD sensitive.
1996 Aug 6
2
853-1786 17157
PHILIPS [ NXP SEMICONDUCTORS ]
