- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄368610 > S1M8662A (SAMSUNG SEMICONDUCTOR CO. LTD.) CDMA/PCS/GPS Triple Mode IF/ baseband IC PDF資料下載
參數(shù)資料
| 型號(hào)： | S1M8662A |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | CDMA/PCS/GPS Triple Mode IF/ baseband IC |
| 中文描述： | 碼分多址/件/全球定位系統(tǒng)三模式中頻/基帶IC |
| 文件頁數(shù)： | 12/22頁 |
| 文件大?。?/td> | 175K |
| 代理商： | S1M8662A |
S1M8662A (Preliminary)
RX IF/BBA WITH GPS
12
GPS Rx Signal Path
The difference of the S1M8662A from the S1M8656A is that S1M8662A provides GPS receiving operation.
While GPS receiving path shares function blocks with CDMA modes, it needs independent AGC and lowpass
filter.
GPS IF signal from GPS RF-IF mixer is applied to S1M8662A via GPS SAW filter. GPS IF is differential input
pins.
The operation of I/Q demodulator is the same in CDMA modes and the phase relation of I/Q signal of the output
is the same as depicted in Figure 5.
GPS lowpass filter of S1M8662A has its cut off frequency at around 800kHz.
A-D converter, as output of GPS path, is the 4bit parallel converter which is the same one used in CDMA path.
But the sampling frequency is different from that of CDMA mode. And in operating in GPS mode, sampling clock
of A-D converter should be supplied from the modem.
TCXO Clock Generator
In S1M8656A and S1M8660A, the output of TCXO is divided by 1, 2, and 4 and then clocked out. But in
S1M8662A the output of TCXO is just amplified and clocked out. So, there is no SPI control which controls the
division ratio of TCXO clock. In this product, the TCXO_in pin can input both TCXO signal (TCXO_sig) and
TCXO control (TCXO_cont) at the same time.
Buffer
x1
TCXO_sig
TCXO_out
TCXO_cont
C
R
S1M8662A
22
LPF
9
Figure 5. TCXO Clock Generating
If TCXO_cont pin is held low or high-impedance (floating), TCXO_out keeps high, and on the contrary, if
TCXO_cont pin is held high, TCXO_out outputs TCXO clock. If TCXO_cont pin is low or high-impedance
(floating), S1M8662A can be pin to pin compatible with IFR3500 of Qualcomm.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| S1M8662AX01-F0T0 | CDMA/PCS/GPS Triple Mode IF/ baseband IC |
| S1M8836 | FRACTIONAL-N RF/INTEGER-N IF DUAL PLL |
| S1M8836X01-G0T0 | FRACTIONAL-N RF/INTEGER-N IF DUAL PLL |
| S1M8837 | FRACTIONAL-N RF/INTEGER-N IF DUAL PLL |
| S1M8837X01-G0T0 | FRACTIONAL-N RF/INTEGER-N IF DUAL PLL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S1M8662AX01-F0T0 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:CDMA/PCS/GPS Triple Mode IF/ baseband IC |
| S1M8821 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:INTERGER RF/IF DUAL PLL |
| S1M8821X01-R0T0 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:INTERGER RF/IF DUAL PLL |
| S1M8822 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:INTERGER RF/IF DUAL PLL |
| S1M8822X01-R0T0 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:INTERGER RF/IF DUAL PLL |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。