- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385524 > MAX2754 (Maxim Integrated Products, Inc.) 1.2GHz VCO with Linear Modulation Input PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX2754 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1.2GHz VCO with Linear Modulation Input |
| 中文描述： | 1.2GHz VCO，帶有線性調(diào)制輸入 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 175K |
| 代理商： | MAX2754 |
M
Applications Information
Tune Input
The tuning input is typically connected to the output of
the PLL loop filter. The loop filter provides an appropri-
ately low-impedance source. Incorporate an extra RC
filter stage to reduce high-frequency noise and spuri-
ous signals. Any excess noise on the tuning input is
directly translated into FM noise, which can degrade
the phase-noise performance of the oscillator.
Therefore, it is important to minimize the noise intro-
duced on the tuning input. A simple RC filter with low
corner frequency is needed during testing to filter the
noise present on the voltage source driving the tuning
line.
Two-Level FSK Applications
The MAX2754 is designed for use in FSK applications
operating in the 2.4GHz to 2.5GHz ISM band. Specifically,
it is targeted for those systems which utilize a direct TX
modulation architecture in which the VCO is directly modu-
lated with the data signal during the transmit (TX) mode.
The VCO in these systems runs at half the RF output
frequency and is used in conjunction with a frequency
doubler to produce the final LO signal for both RX and
TX modes of operation.
Figure 2 shows a typical applications circuit. To com-
pute R1, R2, R3, and R4, determine the modulation
voltage center point (V
MODB
= +1.4V). Compute the
required modulation voltage deviation as follows:
1.2GHz VCO with Linear
Modulation Input
6
_______________________________________________________________________________________
O
MODULATION VOLTAGE, V
MOD
(V)
1.0
f
NOM
f
NOM
+ f
MOD
f
NOM
- f
MOD
2.0
1.5
2.5
0.5
Figure 1. Modulation Frequency Deviations Characteristics
SHDN
FROM BASEBAND
DIGITAL
CONTROLLER
GND2
OUT
V
CC
V
CC
MOD
GND1
R1
R2
R4
R3
TUNE
FROM PLL
LOOP FILTER
VREG
330nF
OUT TO
MIXER/
SYNTHESIZER
330nF
INVERTED
CMOS
SIGNAL
MAX2754
REG AND BIAS
MOD.
FILTER
OSCILLATOR
CORE
LINEAR
MODULATION
INTERFACE
V
CC
Figure 2. Typical Application Circuit for Two-Level FSK
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX2754EUA | 1.2GHz VCO with Linear Modulation Input |
| MAX275 | 4th- and 8th-Order Contnuous-Time Active Filters |
| MAX275A | 4th- and 8th-Order Contnuous-Time Active Filters |
| MAX275B | 4th- and 8th-Order Contnuous-Time Active Filters |
| MAX274ACNG | 4th- and 8th-Order Contnuous-Time Active Filters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX2754EUA | 功能描述:VCO振蕩器 1.2Ghz VCO w/Linear Modulation Input RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負(fù)載電容: 封裝:Reel 電源電壓:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作溫度:0 C 最大工作溫度:+ 70 C |
| MAX2754EUA+ | 功能描述:VCO振蕩器 1.2Ghz VCO w/Linear Modulation Input RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負(fù)載電容: 封裝:Reel 電源電壓:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作溫度:0 C 最大工作溫度:+ 70 C |
| MAX2754EUA+T | 功能描述:VCO振蕩器 1.2Ghz VCO w/Linear Modulation Input RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負(fù)載電容: 封裝:Reel 電源電壓:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作溫度:0 C 最大工作溫度:+ 70 C |
| MAX2754EUA-T | 功能描述:VCO振蕩器 MAX2754 Eval Kit RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負(fù)載電容: 封裝:Reel 電源電壓:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作溫度:0 C 最大工作溫度:+ 70 C |
| MAX2754EVKIT | 功能描述:時(shí)鐘和定時(shí)器開發(fā)工具 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。