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參數(shù)資料
| 型號(hào)： | LMX2531LQ1500EX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 80 MHz, QCC36 |
| 封裝： | 6 X 6 MM, 0.8 MM, LCC-36 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 458K |
| 代理商： | LMX2531LQ1500EX |
September 4, 2008
LMX2531LQ1500E
High Performance Frequency Synthesizer System with
Integrated VCO
General Description
The LMX2531LQ1500E is a low power, high performance
frequency synthesizer system which includes a fully integrat-
ed delta-sigma PLL and VCO with fully integrated tank circuit.
The third and fourth poles are also integrated and also ad-
justable. Also included are integrated ultra-low noise and high
precision LDOs for the PLL and VCO which give higher supply
noise immunity and also more consistent performance. When
combined with a high quality reference oscillator, the
LMX2531LQ1500E generates very stable, low noise local os-
cillator signals for up and down conversion in wireless com-
munication devices. The LMX2531LQ1500E is a monolithic
integrated circuit, fabricated in an advanced BiCMOS pro-
cess. There are several different versions of this product in
order to accomdate different frequency bands.
Device programming is facilitated using a three-wire
MICROWIRE Interface that can operate down to 1.8 volts.
Supply
voltage
range
is
2.8
to
3.2
Volts.
The
LMX2531LQ1500E is available in a 36 pin 6x6x0.8 mm Lead-
Free Leadless Leadframe Package (LLP).
Target Applications
■ Data Converting Clocking
Features
■ PLL Features
— Fractional-N Delta Sigma Modulator Order
programmable up to 4th order
— FastLock/Cycle Slip Reduction with Timeout Counter
— Partially integrated, adjustable Loop Filter
— Very low phase noise and spurs
■ VCO Features
— Integrated tank inductor
— Low phase noise
— 1499 - 1510 MHz Output Frequency
— 749.5 - 755 MHz Output Frequency (Divide by 2 Mode)
■ Other Features
— 2.8 V to 3.2 V Operation
— Low Power-Down Current
— 1.8V MICROWIRE Support
— Package: 36 Lead LLP
Functional Block Diagram
20195001
2008 National Semiconductor Corporation
201950
www.national.com
LMX2531LQ1500E
High
Performance
Frequency
Synthesizer
System
with
Integrated
VCO
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