SA9024 Ver la hoja de datos (PDF) - Philips Electronics
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SA9024 Datasheet PDF : 23 Pages
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Philips Semiconductors
900 MHz transmit modulator and 1.3 GHz
fractional–N synthesizer
Objective specification
SA9024
DESCRIPTION
This specification defines the requirements for a transmitter
modulator and fractional–N synthesizer IC to be used in cellular
telephones which employ the North American Dual Mode Cellular
System (IS–136).
FEATURES
• Low current from 3.75V supply
• Low phase noise
• Main loop with internal charge pump and fractional compensation
• 3–line serial interface bus
• Power down for the synthesizers
• Speedup mode for faster switching
APPLICATIONS
• Cellular phones
• Portable battery–powered radio equipment.
GENERAL DESCRIPTION
The SA9024 BICMOS device integrates:
• Main channel synthesizer
• Auxiliary synthesizer
• Transmit offset synthesizer and oscillator
• I/Q modulator
• Power control
• Reference and clock buffers
• Control logic for programming and power down modes
PIN CONFIGURATION
48 47 46 45 44 43 42 41 40 39 38 37
PHP 1
V CC 2
RXLO1 3
RXLO2 4
GND 5
V CC 6
TXLO1 7
TXLO2 8
GND 9
PHS out 10
Ipeak 11
TANK1 12
SA9024
13 14 15 16 17 18 19 20 21 22 23 24
36 XTAL2
35 TXEN
34 DATA
33 CLOCK
32 LOCK
31 STROBE
30 GND
29 V CC
28 I
27 I
26 Q
25 Q
Figure 1. Pin Configuration
SR01536
QUICK REFERENCE DATA
SYMBOL
VCC
ICC
ICC_save
fVCO
fAUX
fXTAL
fPC
Tamb
PARAMETER
Supply voltage
Supply current
Total supply current in power–down
mode
Input frequency
Input frequency
Crystal reference input frequency
Maximum phase comparator frequency
Operating ambient temperature
CONDITIONS
VCC
Main and Aux loops
MIN.
3.6
–
–
800
10
10
–
–40
TYP.
3.75
TBD
TBD
–
–
–
–
–
MAX.
3.9
–
–
1300
500
40
5
+85
UNIT
V
mA
mA
MHz
MHz
MHz
MHz
°C
ORDERING INFORMATION
TYPE NUMBER
SA9024
NAME
LQFP48
PACKAGE
DESCRIPTION
Plastic low profile quad flat package; 48 leads; body 7x7x1.4 mm
VERSION
SOT313-2
1997 Aug 01
2
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