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SA9025 Datasheet(Fiches technique) 2 Page - NXP Semiconductors

Numéro de pièce SA9025
Description  900 MHz transmit modulator and 2.2 GHz fractional-N synthesizer
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
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Philips Semiconductors
Objective specification
SA9025
900 MHz transmit modulator and 2.2 GHz
fractional–N synthesizer
2
1997 Aug 01
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 SA9025 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
SR01446
45
46
47
48
1
2
3
4
5
6
7
13 14
15 16 17 18 19
25
26
27
28
29
30
42
43
44
31
32
33
34
35
36
20
21 22 23 24
8
9
10
11
12
39
40
41
37
38
PHP
V
RX
GND
GND
Ipeak
TANK1
XTAL
TX
DATA
CLOCK
LOCK
STROBE
GND
I
Q
CC
V CC
V CC
SA9025
LO1
RXLO2
TXLO1
TXLO2
PHS out
EN
2
Q
I
Figure 1.
Pin Configuration
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VCC
Supply voltage
VCC
3.6
3.75
3.9
V
ICC
Supply current
TBD
mA
ICC_save
Total supply current in power–down
mode
TBD
mA
fVCO
Input frequency
800
2200
MHz
fAUX
Input frequency
10
500
MHz
fXTAL
Crystal reference input frequency
10
40
MHz
fPC
Maximum phase comparator frequency
Main and Aux loops
5
MHz
Tamb
Operating ambient temperature
–40
+85
°C
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
SA9025
LQFP48
Plastic low profile quad flat package; 48 leads; body 7x7x1.4 mm
SOT313-2




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