- 您现在的位置：买卖IC网 > PDF目录225341 > TRF2050PW (TEXAS INSTRUMENTS INC) PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO20 PDF资料下载
参数资料
| 型号： | TRF2050PW |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO20 |
| 封装： | PLASTIC, SO-20 |
| 文件页数： | 9/34页 |
| 文件大小： | 543K |
| 代理商： | TRF2050PW |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页
TRF2050
LOW-VOLTAGE 1.2-GHz FRACTIONAL-N/INTEGER-N SYNTHESIZER
SLWS030E– JUNE 1996 – REVISED OCTOBER 2000
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
serial programming input
The TRF2050 internal registers are programmed using a three-wire (CLOCK, DATA, STROBE) serial interface.
The serial data is structured into 24-bit standard-length or 32-bit long-length words of which one or four bits are
dedicated address bits. The flag LONG in the D-Word determines whether the A0 (LONG = 0) or A1
(LONG = 1) format is applicable. Figures 18 and 19 show the format of the serial data for two modes of TRF2050
operation: SA7025 and EPM, respectively. The least significant bit (LSB) of the C-Word determines the
operational mode of the TRF2050: 0 = SA7025, 1 = EPM.
In SA7025 mode, the TRF2050 emulates the Philips SA7025 with respect to serial programming.
Microcontroller software written for the SA7025 works transparently when the TRF2050 is operated in SA7025
emulation mode.
Figure 2 shows the timing diagram of the serial input. When the STROBE signal is low, the signal on the DATA
input is clocked into a shift register on the positive edges of the CLOCK. When the STROBE signal is high,
depending on the 1 or 4 address bit(s), the data is latched into different working registers or temporary registers.
In order to fully program the synthesizer, four words must be sent: D, C, B, and A. The E-Word is for testing
purposes only.
The A-Word contains new data for the main divider. The A-Word is loaded only when a main divider
synchronization signal is also active. This is done to avoid phase jumps during reprogramming the main divider.
The synchronization signal is generated by the main divider.
When the TRF2050 is operated in SA7025 emulation mode, programming the A-Word sets the main charge
pumps, which are located on outputs PHP and PHI, into speed-up mode, as long as the STROBE is high. When
the TRF2050 is operated in EPM mode, speed-up mode duration is determined by field G in the B-Word.
NOTE:
The C-Word must be sent during the first programming cycle after power-up
in order to set the mode of operation (7025 or EPM).
相关PDF资料 |
PDF描述 |
|---|---|
| TRF2056PWR | PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO20 |
| TRF4000 | Pcs RX-mixer |
| TRF4002PWP | 1850 MHz - 1910 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| TRS-1300-1305-8310 | TRIPLE COLOR LED ARRAY |
| TRS-1300-1311-8310 | DUAL COLOR LED ARRAY |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TRF2052 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LOW-VOLTAGE 2-GHz SYNTHESIZER |
| TRF2052PW | 功能描述:IC LV 2-GHZ SYNTH 20-TSSOP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:- 标准包装:2,000 系列:- 类型:PLL 频率合成器 PLL:是 输入:晶体 输出:时钟 电路数:1 比率 - 输入:输出:1:1 差分 - 输入:输出:无/无 频率 - 最大:1GHz 除法器/乘法器:是/无 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-LSSOP（0.175"，4.40mm 宽） 供应商设备封装:16-SSOP 包装:带卷 (TR) 其它名称:NJW1504V-TE1-NDNJW1504V-TE1TR |
| TRF2056 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LOW-VOLTAGE 1,2-GHz FRACTIONAL-N/INTEGER-N SYNTHESIZER |
| TRF2056PW | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TRF2253PWR | 制造商:Texas Instruments 功能描述: |
发布紧急采购，3分钟左右您将得到回复。