- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382715 > UAA1570HL (NXP SEMICONDUCTORS) Global Positioning System (GPS)baseband processor(通用定位系統(tǒng)基帶處理器) PDF資料下載
參數(shù)資料
| 型號： | UAA1570HL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通信及網(wǎng)絡 |
| 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)： | 20/76頁 |
| 文件大?。?/td> | 890K |
| 代理商： | UAA1570HL |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁當前第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁
1999 May 10
20
Philips Semiconductors
Product specification
Global Positioning System (GPS) front-end
receiver circuit
UAA1570HL
7.2
Correlation of the UAA1570HL data sheet,
application and test boards
The application circuit does not allow easy measurement,
calibration and documentation of the many sub-block
characteristics which ensure good system performance.
Therefore, test boards have been developed which allow
direct measurement of the sub-block characteristics.
These boards use a 1 : 16
ratio RF transformer to
transform 50
to the more appropriate value of 800
at
IF frequencies. The high-impedance side of these
transformers is terminated with a physical resistor to adjust
the UAA1570HL impedance at the port being measured, to
approximately 800
. This ensures that a calibrated signal
is applied or received in the 50
test environment.
The transformer provides marginal performance at
41.8 MHz, so calibration results for this transformer are
also included in this document.
The 800
impedance environment is somewhat less than
that used in the application board. The UAA1570HL
Characteristic tables provided in this document are
calibrated to this 800
environment as quantified in the
notes at the end of the table. The effects of the transformer
and associated termination losses have also been
removed to some extent, so that specifications reflect the
performance of the IC. The measured graph results were
all derived from the test boards and corrected to again
reflect part performance as much as possible.
However, this was not always possible, so some
discussion concerning the measurement limitations is
provided where appropriate. Where possible, fundamental
design relationships and limitations are indicated.
The following two graphs (Figs 11 and 12) reflect the
measured performance of the 1 : 16
ratio RF
transformer used to test the IF functions. Two transformers
were placed back-to-back to make these measurements.
Figure 11 represents the transmission function of just one
of these transformers over frequency. Figure 12
represents the associated return loss at one input with the
second transformer terminated into 50
. In the actual
UAA1570HL test board a single transformer is terminated
in 800
.
In addition to the direct effects of power losses introduced
by the transformer (approximately
1.3 dB at 41.82 MHz),
which are reflected in the measured S21 results, the test
board results may also be impacted by deficiencies in the
transformer 1 : 4 voltage step-up ratio at 41.8 MHz;
however, this has not been quantified.
An additional correction must be made to the current test
results to compensate for internal 4 pF shunt capacitors on
each collector output of the first mixer, which have not
been resonated out in the testing.
The first mixer measurements also include a 3 dB loss due
to the 800
transformer termination. This loss is also
removed from the specification result. The second mixer
has similar 2.1 dB input and 3 dB output transformer
termination losses removed from the specification.
For measurements made at 3.48 MHz in the second IF,
0.4 dB must be added to the measured results to reflect
transformer losses at IF2, also.
In summary the measured gain of the first mixer has been
increased by 1.3 dB (transformer IL) + 1.4 dB (capacitive
roll-off effects) + 0.2 dB (gain match) + 3 dB (output
transformer termination loss) or 5.9 dB to calibrate out
these losses in the specification.
The measured gain of the second mixer has been
increased by 1.3 dB (input transformer IL) + 1.7 dB
(input term loss) + 0.4 dB (output transformer IL) and
+ 3 dB (output term loss) or 6.4 dB to calibrate out these
losses in the specification.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UAA2033T | 3.3V range 8-bit MCU for automotive with 32 Kbyte Flash, 10-bit ADC, 5 timers, SPI, SCI, I2C interface |
| UAA2050 | 8-bit MCU for automotive, 3.8 to 5.5V operating range with 8 to 32 Kbyte Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI |
| UAA2050T | 8-bit MCU for automotive, 3.8 to 5.5V operating range with 8 to 32 Kbyte Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI |
| UAA2067GB-S | 8-bit MCU for automotive, 3.8 to 5.5V operating range with 8 to 32 Kbyte Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI |
| UAA2067GB-T | 8-bit MCU for automotive, 3.8 to 5.5V operating range with 8 to 32 Kbyte Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UAA170 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:LED Driver for Light Spot Displays |
| UAA180 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:LED Driver for Light Band Displays |
| UAA2016 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:ZERO VOLTAGE SWITCH POWER CONTROLLER |
| UAA2016/D | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Zero Voltage Switch Power Controller |
| UAA2016_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Zero Voltage Switch Power Controller |
發(fā)布緊急采購，3分鐘左右您將得到回復。