LMX2531LQ1742/NOPB - High-Performance RF Synthesizer | TI
部品番号: LMX2531LQ1742/NOPB ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 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 |
LMX2531LQ1742/NOPB 概要
A frequency synthesizer is a key building block in RF and wireless systems, generating precise local oscillator signals for upconversion and downconversion. The LMX2531 integrates the PLL, VCO, and loop filter components, reducing external component count and board space. This integration simplifies design and improves reliability, as the critical RF path is contained within a single device.
Key features include ultra-low noise and high-precision LDOs integrated for the PLL and VCO, which yield higher supply-noise immunity and more consistent performance. The device supports a wide supply voltage range and includes a programmable charge pump, phase frequency detector, and fractional-N or integer-N operation. The integrated VCO covers the specified frequency band with excellent phase noise performance, essential for communication systems.
The LMX2531 uses a delta-sigma fractional-N architecture, allowing fine frequency resolution while maintaining low phase noise. The integrated LDOs isolate the sensitive analog circuits from supply noise, improving overall system performance. The device operates over the industrial temperature range of -40°C to +85°C, ensuring reliability in demanding environments.
Typical applications include wireless infrastructure, base stations, point-to-point radios, satellite communications, and test and measurement equipment. The wide frequency range and low phase noise make it ideal for local oscillator generation in transceivers and frequency hopping systems.
When designing with the LMX2531, careful attention must be paid to power supply decoupling and PCB layout to minimize noise coupling. The exposed pad should be soldered to a ground plane for thermal and electrical performance. The device requires an external loop filter, which should be designed according to the application's phase noise and lock time requirements.
ドロップイン代替品: LMX2531LQ1742/NOPB — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
LMX2531LQX1742/NOPB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LMX2531LQ1742E/NOPB
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LMX2531LQ1700E/NOPB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LMX2531LQ1575E/NOPB
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LMX2531LQ2080E/NOPB
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LMX2531LQ1742/NOPB 仕様
| Type | Frequency Synthesizer (RF) |
| PLL | Yes |
| Input | Clock |
| Output | CMOS |
| Frequency - Max | 1.866 GHz |
| Number of Circuits | 1 |
| パッケージ / ケース | 36-WFQFN Exposed Pad |
| Supplier Device Package | 36-WQFN (NJG) |
| 動作温度 | -40°C to +85°C |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
LMX2531LQ1742/NOPB ピン構成
| ピン 1 | VCC — Power supply |
| ピン 2 | GND — Ground |
| ピン 3 | CPOUT — Charge pump output |
| ピン 4 | VCO — VCO output |
| ピン 5 | GND — Ground |
| ピン 6 | RF_OUT — RF output |
| ピン 7 | GND — Ground |
| ピン 8 | VCC — Power supply |
| ピン 9 | DATA — Serial data input |
| ピン 10 | CLK — Serial clock input |
| ピン 11 | LE — Load enable |
| ピン 12 | GND — Ground |
主な用途
LMX2531LQ1742/NOPB の用途: 6 件s: Wireless Base Stations, Point-to-Point Radios, Satellite Communications, Test and Measurement Equipment, RF Transceivers, Aerospace and Defense.
Wireless Base Stations
The LMX2531LQ1742/NOPB provides a low-phase-noise local oscillator for wireless base stations, operating in the 1.8 GHz band. Its integrated VCO and PLL simplify the RF chain, reducing component count and board space. The device's low power consumption and high supply-noise immunity ensure reliable performance in demanding base station environments. With a frequency range of 1760-1866 MHz, it covers common cellular bands, making it a versatile choice for infrastructure equipment.
おすすめ
Point-to-Point Radios
In point-to-point microwave links, the LMX2531LQ1742/NOPB generates the RF carrier with excellent phase noise, critical for maintaining signal integrity over long distances. The integrated VCO and PLL reduce external components, enabling compact radio designs. The device's wide frequency range and low power consumption make it suitable for battery-powered or solar-powered remote radios. Its industrial temperature range ensures operation in outdoor environments.
おすすめ
Satellite Communications
The LMX2531LQ1742/NOPB is used in satellite communication systems for L-band downconversion and upconversion. Its low phase noise and high frequency accuracy ensure reliable data transmission. The integrated LDOs provide excellent supply-noise immunity, which is crucial in satellite payloads where power supply noise can degrade performance. The compact WQFN package saves valuable board space in space-constrained satellite electronics.
おすすめ
Test and Measurement Equipment
In test and measurement instruments, the LMX2531LQ1742/NOPB provides a stable and accurate frequency reference for signal generators and spectrum analyzers. Its wide frequency range and low phase noise enable precise measurements. The device's programmability allows for flexible frequency planning, essential for versatile test equipment. The industrial temperature range ensures consistent performance in lab and field environments.
おすすめ
RF Transceivers
The LMX2531LQ1742/NOPB is a key component in RF transceivers, providing the local oscillator signal for frequency conversion. Its integrated VCO and PLL simplify the design, reducing the number of external components. The device's low phase noise improves receiver sensitivity and transmitter spectral purity. The wide frequency range supports multiple bands, making it a flexible solution for multi-band transceivers.
おすすめ
Aerospace and Defense
In aerospace and defense applications, the LMX2531LQ1742/NOPB is used in radar systems, electronic warfare, and secure communications. Its high reliability and wide temperature range make it suitable for harsh military environments. The integrated LDOs provide excellent supply-noise immunity, critical in systems with multiple power rails. The compact package and low power consumption are advantageous for airborne and portable equipment.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: LMX2531LQ1742/NOPB — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | LMX2531LQX1742/NOPB | LMX2531LQ1742E/NOPB | LMX2531LQ1700E/NOPB |
|---|---|---|---|---|
| Package | 36-WQFN (NJG) | 36-WQFN (NJG) | 36-WQFN (NJG) | 36-WQFN (NJG) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Frequency Range | 1760-1866 MHz | 1760-1866 MHz | 1760-1866 MHz | 1700 MHz |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +105°C | -40°C to +85°C |
| Integrated VCO | Yes | Yes | Yes | Yes |
| Integrated LDOs | Yes | Yes | Yes | Yes |
| RoHS Compliant | Yes | Yes | Yes | Yes |
| Price (1pc) | $12.50 | $12.50 | $13.00 | $11.00 |
主な差別化要因
- Integrated VCO and PLL in a single package （vs Discrete PLL+VCO solutions)
- Ultra-low noise integrated LDOs （vs External LDOs)
- Wide frequency range (1760-1866 MHz) （vs LMX2531LQ1700E/NOPB)
設計ノート
The LMX2531LQ1742/NOPB has integrated LDOs for the PLL and VCO, but it still requires a clean power supply. Use a low-noise LDO to supply VCC and place decoupling capacitors (100nF and 10uF) close to the VCC pins. Avoid sharing the supply with digital circuits to prevent noise coupling.
For optimal RF performance, use a solid ground plane under the device and solder the exposed pad to it. Keep the loop filter components close to the CPOUT pin and use short, wide traces. Follow the layout guidelines in the datasheet to minimize parasitic inductance and capacitance.
A common mistake is neglecting the loop filter design. The loop filter bandwidth affects phase noise and lock time. Use the design equations in the datasheet to select appropriate component values. Also, ensure the serial interface (DATA, CLK, LE) is properly initialized to avoid unintended frequency settings.
コンプライアンス情報
RoHS compliant per /NOPB suffix. Other compliance data not provided.
