LMX2531LQ1742/NOPB - High-Performance RF Synthesizer | TI
MPN: LMX2531LQ1742/NOPB β Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for LMX2531LQ1742/NOPB β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
LMX2531LQX1742/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LMX2531LQ1742E/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LMX2531LQ1700E/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LMX2531LQ1575E/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LMX2531LQ2080E/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LMX2531LQ1742/NOPB Maximum Ratings & Electrical Characteristics
| Type | Frequency Synthesizer (RF) |
| PLL | Yes |
| Input | Clock |
| Output | CMOS |
| Frequency - Max | 1.866 GHz |
| Number of Circuits | 1 |
| Package / Case | 36-WFQFN Exposed Pad |
| Supplier Device Package | 36-WQFN (NJG) |
| Operating Temperature | -40Β°C to +85Β°C |
| Mounting Type | Surface Mount |
| Voltage - Supply | [DATA_NEEDED: Voltage - Supply] |
| Current - Supply | [DATA_NEEDED: Current - Supply] |
| Phase Noise | [DATA_NEEDED: Phase Noise] |
| RoHS Status | Compliant |
| Moisture Sensitivity Level (MSL) | [DATA_NEEDED: MSL Level] |
LMX2531LQ1742/NOPB Pin Configuration
| Pin 1 | VCC β Power supply |
| Pin 2 | GND β Ground |
| Pin 3 | CPOUT β Charge pump output |
| Pin 4 | VCO β VCO output |
| Pin 5 | GND β Ground |
| Pin 6 | RF_OUT β RF output |
| Pin 7 | GND β Ground |
| Pin 8 | VCC β Power supply |
| Pin 9 | DATA β Serial data input |
| Pin 10 | CLK β Serial clock input |
| Pin 11 | LE β Load enable |
| Pin 12 | GND β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LMX2531LQ1742/NOPB is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for LMX2531LQ1742/NOPB β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 | -40Β°C to +85Β°C | -40Β°C to +85Β°C | -40Β°C to +105Β°C | -40Β°C to +85Β°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 |
Key Differentiators
- 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)
Design Notes
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.
Compliance Information
RoHS compliant per /NOPB suffix. Other compliance data not provided.
