參數(shù)資料
型號(hào)： SA9025
廠商： NXP SEMICONDUCTORS
元件分類： 通信及網(wǎng)絡(luò)
英文描述： 900 MHz transmit modulator and 2.2 GHz fractional-N synthesizer
中文描述： SPECIALTY TELECOM CIRCUIT, PQFP48
封裝： 7 X 7 X 1.40 MM, PLASTIC, LQFP-48
文件頁數(shù)： 2/23頁
文件大?。?/td> 134K
代理商： SA9025
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
RX
LO2
GND
VCC
GND
Ipeak
TANK1
XTAL
TX
DATA
CLOCK
LOCK
STROBE
GND
I
Q
P
G
R
G
I
G
P
R
M
T
V
G
G
G
G
G
D
G
G
CC
V
VCC
VC
VC
SA9025
LO1
TX
LO1
TX
LO2
PHS out
T
D
T
EN
2
X
1
Q
I
Figure 1.
Pin Configuration
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
CC
I
CC
I
CC_save
Supply voltage
V
CC
3.6
3.75
3.9
V
Supply current
–
TBD
–
mA
Total supply current in power–down
mode
–
TBD
–
mA
f
VCO
f
AUX
f
XTAL
f
PC
T
amb
Input frequency
800
–
2200
MHz
Input frequency
10
–
500
MHz
Crystal reference input frequency
10
–
40
MHz
Maximum phase comparator frequency
Main and Aux loops
–
–
5
MHz
Operating ambient temperature
–40
–
+85
°
C
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME
LQFP48
DESCRIPTION
VERSION
SOT313-2
SA9025
Plastic low profile quad flat package; 48 leads; body 7x7x1.4 mm
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