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參數(shù)資料
| 型號： | UAA1570HL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Global Positioning System (GPS)baseband processor(通用定位系統(tǒng)基帶處理器) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP48 |
| 封裝： | PLASTIC, SOT-313, LQFP-48 |
| 文件頁數(shù)： | 6/76頁 |
| 文件大?。?/td> | 890K |
| 代理商： | UAA1570HL |
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1999 May 10
6
Philips Semiconductors
Product specification
Global Positioning System (GPS) front-end
receiver circuit
UAA1570HL
6
PINNING INFORMATION
SYMBOL
PIN
PIN VOLTAGE
TYPICAL VALUES (V)
DESCRIPTION
V
CC
= 2.7 V
2.7
V
CC
= 5 V
V
CCA(LNA2)
1
5
LNA2 power supply:
DC operation range 2.7 to 5 V; use close
proximity RF decoupling to pins 2, 4 and 5
LNA2 ground 1:
minimize RF ground inductance
LNA2 input:
use external RF AC coupling
LNA2 bias circuit ground:
minimize RF ground inductance
LNA2 ground 2:
minimize RF ground inductance
LNA2 output:
use external RF AC coupling. The DC voltage is
approximately 1.3 V below the V
CCA(LNA2)
supply on pin 1.
Serial interface clock input:
this DC coupled CMOS
CLOCK
input moves 20-bit programming words into the synthesizer
DATA
input register while the
STROBE
is LOW. A DC
short-circuit to ground is recommended with the default
frequency plan.
Reference input:
use external AC coupling. The DC voltage is
approximately 1 V below the V
CCA(PLL)
supply on pin 36.
VCO power supply:
DC operation range 2.7 to 5 V; use
critical
close proximity RF decoupling to pin 11
VCO negative impedance resonator port:
use the absolute
minimum trace lengths and widths and keep the loop to the VCO
ground pin 11 as short as possible, while centring the COMP
output voltage at pin 40 within the charge pump output voltage
range given in Chapter 11 by adjusting the resonator inductance
and/or required AC coupling component.
VCO ground:
minimize RF ground inductance; use
critical
close proximity RF decoupling to VCO supply pin 9
this pin provides additional RF shielding and has to be
connected to ground
RF mixer preamplifier ground:
minimize RF ground inductance
RF mixer preamplifier input:
use external AC coupling and RF
matching
RF mixer ground:
minimize RF ground inductance; use
critical
close proximity RF decoupling to V
CCA(MX1P)
supply pin 16
RF preamplifier/mixer power supply:
DC operation range
2.7 to 5 V; use
critical
close proximity RF decoupling to pin 15
RF mixer IF positive output:
DC couple this output pin to the
V
CCA(MX1P)
supply through first IF filter inductors or RF chokes.
Capacitively decouple the supply near the output inductors.
Balanced first mixer IF1 outputs are recommended. Prevent
externally squared reference harmonics from entering the first IF
signal path or components.
LNA2GND1
LNA2IN
BIASGND2
LNA2GND2
LNA2OUT
2
3
4
5
6
0
0.815
0
0
1.48
0
0.807
0
0
3.629
CLOCK
7
CMOS level
CMOS level
REFIN
8
1.69
3.99
V
CCA(VCO)
9
2.7
5
TANK
10
1.92
1.92
VCOGND
11
0
0
P12GND
12
0
0
MXPGND
MX1IN
13
14
0
0.82
0
0.81
MX1GND
15
0
0
V
CCA(MX1P)
16
2.7
5
IF1P
17
2.7
5
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