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參數(shù)資料
| 型號： | STB5610 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | GPS RF FRONT-END IC |
| 中文描述： | GPS射頻前端IC |
| 文件頁數(shù)： | 4/11頁 |
| 文件大?。?/td> | 158K |
| 代理商： | STB5610 |
STB5610
4/11
Data @ 4 MHz
CMOS levels
CLK @ 16MHz
CMOS levels
SAW Filter
16.368 MHz
Quartz
Two gain
LNA
D
CK
Q
PLL
~
1.55 GHz
20 MHz
Passive
Antenna
RF Amp.
Mixer
D Latch Output buffer
VCO
ExternalTank
1.57 GHz
Gain
Select.
CE
CE2
Loop
Filter
LC Filter
LC Filter
Freq.
select
20 MHz
4 MHz
16 MHz
ASout
1
ST
Lim. amp.
2
ND
Lim. amp.
BLOCK DIAGRAM (GPS L1)
LNA section
The RF input signal is amplified by two gain levels
LNA. Using gain control pin the LNA gain is set to
19 dB to support passive antenna or 10 dB to sup-
port active antenna. The LNA output signal is fil-
tered by 1575.42 MHz SAW filter.
RF Amplifier plus mixer section
The 1575.42 MHz input signal, amplified by RF
amp., is mixed with the VCO signal to generate a
differential 20.46MHz IF signal
IF section
Two LC filters at mixer output and at first limiting
output are used to suppress undesirable signals
and mixer products. The second stage limiting
amplifier is connected to a D-Type latch clocked
by 16.368MHz crystal oscillator signal. The effect
of sampling the 20.46MHz signal at 16.368MHz is
to create sub-sampling alias at 4.092MHz. This is
fed to the output level converter.
Output section
The output buffers perform level translation from
the internal ECL levels to CMOS output levels re-
ferred to ground. The Data signal changes during
the clock signal negative edge.
Power supplies
The STB5610, has been designed to support
from 2.7 V to 3.6 V supply voltage.
VCO and PLL
Using external tank the VCO is able to provide
very low phase noise signal. Through the freq. se-
lector pin the VCO signal is set at 1554.96 MHz
and at 1571.328 MHz. The on-chip reference os-
cillator uses a low cost 16.368 MHz crystal.
Antenna sensor circuitry
Integrated sensor circuitry is able to evaluate the
antenna current consumption; the Asout pin out-
put provides this info externally. Using external
sensing resistor of 10 Ohm if the antenna current
consumption is inside the range 10mA…40mA
(active antennas typical current consumption) the
Asout output logic level is High, if the antenna cur-
rent consumption is outside the above reported
range (passive antenna or problem on antenna
connection) the Asout output logic level is low.
Chip enable
Using the CE pin it is possible to switch off all the
chip ( neither data nor clock available).
Using CE2 pin it is possible to disable the analog
portion of the chip (no data available) maintaining
the digital portion active (Clock available) optimiz-
ing the chip current consumption.
FUNCTIONAL DESCRIPTION
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| STB5610TR | 功能描述:射頻無線雜項 GPS RF Front End RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel |
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| STB5BK50Z-1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:N-CHANNEL500V-1.22ohm-4.4ATO-220/FP/DPAK/IPAK/I2PAK Zener-Protected SuperMESH⑩Power MOSFET |
| STB5N52K3 | 功能描述:MOSFET N-Ch 525V 1.2 Ohm 4.4A SuperMESH3 RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導(dǎo)通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:Max247 封裝:Tube |
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