參數(shù)資料
型號: TRF1121_07
廠商: Texas Instruments, Inc.
英文描述: Dual VCO/PLL Synthesizer With IF Up-Converter
中文描述: 雙的VCO / PLL頻率合成器與中頻直至轉換器
文件頁數(shù): 10/27頁
文件大?。?/td> 1356K
代理商: TRF1121_07
www.ti.com
RC1x21 Output Power vs Input Voltage
6.00
4.00
2.00
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
100
1000
10000
Differential Input Voltage (mVppd)
O
Input at 26 MHz
Output at 325 MHz
T=25 degrees
Input Impedance <800 ohms
Input is sinusoidal
Measured at max gain
INTEGRATED SYNTHESIZERS
PLL Programming
TRF1121
TRF1221
SLWS170A–APRIL 2005–REVISED DECEMBER 2005
Figure 4
shows the output power, two-tone imtermodulation level, LO leakage and gain deviation from ideal vs
gain state while
Figure 5
shows the upconverter gain variation vs temperature.
NOTE: If left unconnected, the GAIN[0], GAIN[1], GAIN[2], GAIN[3], GAIN[4], and TXEN pins rest on logic Low.
Figure 6. Output Power vs Input Voltage
Synthesizer #1 (UHF) and synthesizer #2 (S-band) are both integrated in the TRF1121/TRF1221. These two
PLLs can be programmed via a 3-wire serial bus (CLK, DATA, and EN) from the baseband processor. The timing
specs are given in the AC Timing table.
Synthesizer #2 has a step size of 1 MHz, while Synthesizer #1 offers a step size of 50 kHz, both assuming an
18-MHz reference frequency. Different reference frequencies yield different step sizes, many of which may be
non-integer.
NOTE:
If left unconnected, the DATA, CLK and EN pins rest on logic
High
. EN is level
sensitive.
10
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相關代理商/技術參數(shù)
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