Overview
The LMX2470SLEX/NOPB is a high-performance delta-sigma fractional-N PLL (Phase-Locked Loop) frequency synthesizer produced by Texas Instruments. This device is designed for low power consumption and high performance, making it suitable for a variety of applications requiring precise frequency synthesis. Fabricated using TI’s advanced BiCMOS process, the LMX2470SLEX/NOPB offers enhanced features such as low in-band phase noise, low fractional spurs, and fastlock capabilities.
Key Specifications
| Parameter | Value | Units | Conditions |
|---|---|---|---|
| Frequency Range | Up to 2.6 GHz | - | - |
| Phase Detector Operating Frequency | Up to 30 MHz | - | - |
| Crystal Reference Frequency | Up to 110 MHz | - | - |
| Supply Voltage | 2.25 V to 2.75 V | V | - |
| Current Consumption (Typical) | 4.1 mA | mA | VCC = 2.5 V |
| Power Down Current | 1 to 10 µA | µA | EN = ENOSC = 0V |
| Package Type | 24-lead ULGA (NPF) | - | - |
| Operating Temperature Range | -40°C to +85°C | °C | - |
Key Features
- Delta-sigma fractional-N PLL with an auxiliary integer-N PLL
- Low in-band phase noise and low fractional spurs
- Up to 4th order programmable delta-sigma modulator
- Enhanced anti-cycle slip fastlock circuitry and cycle slip reduction
- Digital lock detect output and integrated timeout counters
- Prescalers allow wide range of N values (RF: 16/17/20/21, IF: 8/9 or 16/17)
- On-chip crystal reference frequency doubler
- Hardware and software power-down control
- Ultra-low power consumption
- Three-line MICROWIRE interface for data transfer
Applications
- Cellular phones and base stations (CDMA, WCDMA, GSM/GPRS, TDMA, EDGE, PDC)
- Satellite and cable TV tuners
- WLAN standards
- Applications requiring fine frequency resolution
Q & A
- What is the frequency range of the LMX2470SLEX/NOPB?
The LMX2470SLEX/NOPB operates up to a frequency range of 2.6 GHz.
- What is the phase detector operating frequency of the LMX2470SLEX/NOPB?
The phase detector operating frequency is up to 30 MHz.
- What is the typical current consumption of the LMX2470SLEX/NOPB?
The typical current consumption is 4.1 mA at a supply voltage of 2.5 V.
- What is the package type of the LMX2470SLEX/NOPB?
The device is available in a 24-lead ULGA (NPF) package.
- What are the key features of the delta-sigma modulator in the LMX2470SLEX/NOPB?
The delta-sigma modulator is programmable up to the 4th order, allowing for the reduction of fractional spurs and phase noise.
- What are the primary applications of the LMX2470SLEX/NOPB?
The primary applications include cellular phones and base stations, satellite and cable TV tuners, WLAN standards, and applications requiring fine frequency resolution.
- How does the LMX2470SLEX/NOPB manage power consumption?
The device features hardware and software power-down control, allowing for ultra-low power consumption, with a power down current of 1 to 10 µA.
- What interface does the LMX2470SLEX/NOPB use for data transfer?
The device uses a three-line MICROWIRE interface for data transfer.
- What is the operating temperature range of the LMX2470SLEX/NOPB?
The operating temperature range is -40°C to +85°C.
- How does the LMX2470SLEX/NOPB reduce cycle slip?
The device features enhanced anti-cycle slip fastlock circuitry and cycle slip reduction mechanisms.
