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參數(shù)資料
| 型號(hào)： | STB5600 |
| 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(yè)數(shù)： | 2/10頁(yè) |
| 文件大?。?/td> | 72K |
| 代理商： | STB5600 |
FUNCTIONAL DESCRIPTION
The STB5600 GPS front-end is fed with the signal from an active antenna, via a ceramic RF filter. The
gain between the antenna element
and the STB5600 is expected to be between 10dB and 35dB
overall,made up of the antenna LNAgain, the feederloss, connectorloss,and the ceramic filter loss.
In order to use an off-the-shelfceramic filter, conventionally50 Ohmssingle ended, a matchingcircuit is
used. (see appendix A.1), which provides a 300 Ohm differentialdrive to the STB5600. A similar circuit
can be used to feedthe LO signal if using the recommended low-cost oscillator circuit (appendix A.3).
Note that the STB5600 radio architecture and the oscillator described here are covered by various
patents held by SGS-Thomson and by others.The use of the circuits described in this data-sheetfor any
other purposemay infringesuch patents.
-
RF SECTION
The differential input signal is amplified by the RF-Amp and mixed with the oscillator signal amplified
from the LO+,LO- inputs to generate a balanced 20.46MHz IF signal. The LO buffer amplifier may be
fed differentialor single ended signals, at levelsbetween -60dBmand -20dBm .
-
IF SECTION
The 20MHz differentialsignal from the mixer is fed throughan external LC filter to suppressundesirable
signals and mixer products. The multi-stage high-sensitivity limiting amplifier is connected to a D-type
latch clocked by an internally derived 16MHz clock.. The effect of sampling the 20MHz signal at 16MHz
is to create a sub-samplingalias at 4MHz. This is fedto the outputlevel-converters.
-
DIVIDER SECTION
The 80MHz oscillator signal may be provided single-ended or differentially to the high impedance
80MHz+, 80MHz- inputs. Any unused inputs should be connected to GNDLOGIC via a 1nF capacitor.
The 80MHz signal is amplified, then divided by 5 to create the 16.368MHz clock required by the
ST20GP1processor, alsoused to clockthe outputlatch of the STB5600.
-
OUTPUT SECTION
The output latch samples the 20.46MHz intermediate frequency at a 16.368MHz rate, performing the
dual function of second downconversion and latching. The downconversion occurs by sub-sampling
aliasing, such that the digital output representsa 4.096MHzcentre frequency
The output buffers perform level translation from the internal ECL levels to CMOS compatible outputs
referred to external ground.
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
RF+, RF- RF Input
T
j
T
stg
R
thj-amb
Parameter
Value
5.9
8
150
-40 to 125
80
Unit
V
dBm
o
C
o
C
o
C/W
DC Supply Voltage
Junction Temperature
Storage Temperature Range
Thermal Resistance Junction-ambient
STB5600
2/10
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STB5600TR | 功能描述:射頻無(wú)線雜項(xiàng) GPS 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 |
| STB5610 | 功能描述:射頻無(wú)線雜項(xiàng) GPS 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 |
| STB5610TR | 功能描述:射頻無(wú)線雜項(xiàng) 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 |
| STB5701 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:350 to 400 MHz FSK/ASK receiver (ST-RECORD01 family) |
| STB57N65M5 | 功能描述:MOSFET N-Ch 650V 0.056 Ohm 42 A MDmesh V 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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