LMX2531 具有集成 VCO 的高性能频率合成器系统

The LMX2531 is a low power, high performance frequency synthesizer system which includes a fully integrated delta-sigma PLL and VCO with fully integrated tank circuit. The third and fourth poles are also integrated and also adjustable. 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 LMX2531 generates very stable, low noise local oscillator signals for up and down conversion in wireless communication devices. The LMX2531 is a monolithic integrated circuit, fabricated in an advanced BiCMOS process. There are several different versions of this product in order to accommodate different frequency bands.

	LMX2531	LMX2541	TRF3765
Operating Frequency Range (Min) (MHz)			300
Operating Frequency Range (Max) (MHz)			4800
Output Frequency (Min) (Mhz)	553	32	300
Output Frequency (Max) (Mhz)	3132	4000	4800
Divider Ratio			1, 2, 4, 8
Prescalers	16/17/20/21	4/5
VCC (V)	2.8 to 3.2	3.15 to 3.45	3.3
Pin/Package			32QFN
Approx. Price (US$)			7.10 \| 100u
Operating Temperature Range (C)			-40 to 85
Lock Time (Typ) (us)			60

LMX2531 特性

Multiple Frequency Options Available

See Selection Guide Below
Frequencies from: 553 MHz - 3132 MHz

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

Other Features

2.8 V to 3.2 V Operation
Low Power-Down Current
1.8 V MICROWIRE Support
Package: 36 Lead LLP

Part	Low Band	High Band
LMX2531LQ1146E	553 - 592 MHz	1106 - 1184 MHz
LMX2531LQ1226E	592 - 634 MHz	1184 - 1268 MHz
LMX2531LQ1312E	634 - 680 MHz	1268 - 1360 MHz
LMX2531LQ1415E	680 - 735 MHz	1360 - 1470 MHz
LMX2531LQ1500E	749.5 - 755 MHz	1499 - 1510 MHz
LMX2531LQ1515E	725 - 790 MHz	1450 - 1580 MHz
LMX2531LQ1570E	765 - 818 MHz	1530 - 1636 MHz
LMX2531LQ1650E	795 - 850 MHz	1590 - 1700 MHz
LMX2531LQ1700E	831 - 885 MHz	1662 - 1770 MHz
LMX2531LQ1742	880 - 933 MHz	1760 - 1866 MHz
LMX2531LQ1778E	863 - 920 MHz	1726 - 1840 MHz
LMX2531LQ1910E	917 - 1014 MHz	1834 - 2028 MHz
LMX2531LQ2080E	952 - 1137 MHz	1904 - 2274 MHz
LMX2531LQ2265E	1089 - 1200 MHz	2178 - 2400 MHz
LMX2531LQ2570E	1168 - 1395 MHz	2336 - 2790 MHz
LMX2531LQ2820E	1355 - 1462 MHz	2710 - 2925 MHz
LMX2531LQ3010E	1455 - 1566 MHz	2910 - 3132 MHz

LMX2531 器件用途

Cellular phones and base stations
Direct digital modulation applications
Satellite and cable TV tuners
WLAN Standards

LMX2531 工具与软件

培训内容	型号	软件/工具类型
LMX2531 Evaluation Module	LMX2531EVM	开发电路板/EVM