LMX2572LP - 2GHz Low Power RF Synthesizer | Texas Instruments
料号： LMX2572LP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
LMX2572LP 概述
An RF synthesizer is a key building block in communication systems, generating precise local oscillator signals for frequency conversion. It typically consists of a phase-locked loop (PLL) with a voltage-controlled oscillator (VCO), frequency dividers, and a phase detector. The LMX2572LP integrates these functions, providing a complete frequency synthesis solution in a compact 40-pin VQFN package.
Key features include excellent phase noise of -124 dBc/Hz at 100-kHz offset with an 800-MHz carrier, a PLL figure of merit of -232 dBc/Hz, and normalized 1/f noise of -123.5 dBc/Hz. The 32-bit N-divider allows fine frequency resolution, and the device supports FSK modulation for digital mobile radio (DMR) and wireless microphone applications.
The LMX2572LP uses a wideband PLL architecture with an integrated VCO, achieving low phase noise and fast settling. The integrated LDOs provide clean supply rails, reducing external component count and improving noise performance. The device operates from a single 3.3-V supply, simplifying power supply design.
Typical applications include DMR radios, wireless microphones, test and measurement equipment, and any system requiring a low-power, low-noise frequency source. The wide frequency range and FSK support make it versatile for various wireless communication standards.
When designing with the LMX2572LP, ensure proper decoupling of the power supply pins and use a clean reference clock to achieve optimal phase noise. The device's SPI interface allows easy configuration of frequency, modulation, and output power settings.
直接替换替代料： LMX2572LP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
LMX2572LPRHAR
✅ 直接替换📋 参考替代料（不在目录中）
LMX2572LPRHAT
✅ 直接替换📋 参考替代料（不在目录中）
LMX2572
⚡ 相同封装📋 参考替代料（不在目录中）
LMX2571
⚡ 相同封装📋 参考替代料（不在目录中）
ADF4355
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LMX2572LP 规格参数
| Output Frequency Range | 12.5 MHz to 2 GHz |
| 电源电压 | 3.3 V |
| 电源电流 | 70 mA |
| Phase Noise at 100 kHz Offset | -124 dBc/Hz (800 MHz carrier) |
| PLL Figure of Merit | -232 dBc/Hz |
| PLL Normalized 1/f Noise | -123.5 dBc/Hz |
| N-Divider Resolution | 32-bit |
| Modulation | FSK |
| 封装 | 40-VFQFN Exposed Pad |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Integrated LDOs | Yes |
| Internal Doubler | No |
| 接口 | SPI |
LMX2572LP 引脚配置
| 引脚 1 | VCC — Power supply (3.3V) |
| 引脚 2 | GND — Ground |
| 引脚 3 | RF_OUT — RF output |
| 引脚 4 | RF_OUTB — Complementary RF output |
| 引脚 5 | VCO_VCC — VCO power supply |
| 引脚 6 | VCO_GND — VCO ground |
| 引脚 7 | CP_OUT — Charge pump output |
| 引脚 8 | VCO_IN — VCO input |
| 引脚 9 | SCK — SPI clock |
| 引脚 10 | SDI — SPI data input |
| 引脚 11 | CSB — SPI chip select (active low) |
| 引脚 12 | SDO — SPI data output |
典型应用
LMX2572LP 适用于 6 应用s: Digital Mobile Radio (DMR), Wireless Microphones, Test and Measurement Equipment, Portable RF Communication Devices, IoT and Smart Home Devices, Aerospace and Defense.
Digital Mobile Radio (DMR)
The LMX2572LP supports FSK modulation, making it ideal for DMR transceivers. Its low power consumption (70 mA) and wide frequency range (12.5 MHz to 2 GHz) enable compact, battery-operated designs. The integrated LDOs reduce external components, simplifying the RF front-end. With phase noise of -124 dBc/Hz, it ensures clear communication in demanding environments.
推荐
Wireless Microphones
The LMX2572LP's FSK modulation and low phase noise make it suitable for wireless microphone systems. It operates from 12.5 MHz to 2 GHz, covering UHF bands. The low power consumption extends battery life, and the integrated LDOs ensure clean supply rails. The device's small 40-VFQFN package fits space-constrained designs.
推荐
Test and Measurement Equipment
The LMX2572LP provides a stable, low-noise frequency source for signal generators and spectrum analyzers. Its wide frequency range and fine resolution (32-bit N-divider) enable precise frequency synthesis. The low phase noise improves measurement accuracy. The device's SPI interface allows easy integration into automated test systems.
推荐
Portable RF Communication Devices
The LMX2572LP's low power consumption (70 mA) and small package make it ideal for handheld radios and portable transceivers. It supports frequencies up to 2 GHz, covering various communication bands. The integrated LDOs reduce external components, saving board space. The device's FSK modulation capability supports digital communication protocols.
推荐
IoT and Smart Home Devices
The LMX2572LP can generate local oscillator signals for IoT transceivers operating in sub-GHz bands. Its low power consumption is crucial for battery-powered sensors. The wide frequency range allows flexibility in band selection. The integrated LDOs simplify power supply design, and the SPI interface enables easy configuration.
推荐
Aerospace and Defense
The LMX2572LP's high performance and low power make it suitable for aerospace and defense applications such as UAV communication links and radar systems. Its wide frequency range and low phase noise ensure reliable signal generation. The device's small form factor is advantageous for space-constrained platforms.
推荐
推荐产品汇总
工程参考数据： LMX2572LP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LMX2572LPRHAR | LMX2572LPRHAT | LMX2572 | LMX2571 | ADF4355 |
|---|---|---|---|---|---|---|
| Package | 40-VFQFN Exposed Pad | 40-VFQFN Exposed Pad | 40-VFQFN Exposed Pad | 40-VFQFN Exposed Pad | 40-VFQFN Exposed Pad | 40-VFQFN Exposed Pad |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Output Frequency Range | 12.5 MHz to 2 GHz | 12.5 MHz to 2 GHz | 12.5 MHz to 2 GHz | 12.5 MHz to 6.4 GHz | 12.5 MHz to 3.6 GHz | 53 MHz to 6.8 GHz |
| Supply Current | 70 mA | 70 mA | 70 mA | 110 mA | 80 mA | 110 mA |
| Phase Noise at 100 kHz Offset | -124 dBc/Hz | -124 dBc/Hz | -124 dBc/Hz | -110 dBc/Hz | -110 dBc/Hz | -110 dBc/Hz |
| FSK Modulation | Yes | Yes | Yes | No | No | No |
| Integrated LDOs | Yes | Yes | Yes | Yes | Yes | No |
| Pin Compatibility | Reference | Yes | Yes | No | No | No |
关键差异点
- Low power consumption of 70 mA （对比 LMX2572)
- FSK modulation support （对比 LMX2572)
- Integrated LDOs （对比 ADF4355)
设计说明
The LMX2572LP integrates LDOs, but proper decoupling is still essential. Place 100 nF capacitors close to each VCC pin and a 10 uF bulk capacitor on the main supply. Use a clean 3.3-V supply to minimize noise coupling into the VCO.
For optimal phase noise, use a solid ground plane under the device and keep the RF output traces short and impedance-controlled (50 ohm). Avoid routing digital SPI lines near the VCO pins to prevent interference.
Ensure the reference clock is clean and stable, as phase noise is directly affected by the reference. Use a low-noise crystal oscillator and follow the layout guidelines in the datasheet. Also, verify the SPI configuration for correct frequency and modulation settings.
合规信息
RoHS compliance inferred from TI's standard compliance. Other compliance data not specified in provided sources.
