Overview
The LMX2470SLEX is a low-power, high-performance delta-sigma fractional-N Phase-Locked Loop (PLL) with an auxiliary integer-N PLL, manufactured by Texas Instruments. This device is fabricated using TI’s advanced BiCMOS process and is designed to offer low in-band phase noise and low fractional spurs. The LMX2470SLEX is available in a 24-lead ULGA (NPF) package with dimensions of 3.5 x 4.5 x 0.6 mm.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Package | ULGA (NPF) | - |
| Pins | 24 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage | 2.25 to 2.75 | V |
| Typical Current Consumption | 4.1 | mA |
| Crystal Reference Frequency | Up to 110 | MHz |
| Phase Comparison Frequency | Up to 30 | MHz |
| RF PLL Prescalers | 16/17/20/21 | - |
| IF PLL Prescalers | 8/9 or 16/17 | - |
Key Features
- Low in-band phase noise and low fractional spurs
- 12-bit or 22-bit selectable fractional modulus
- Up to 4th order programmable delta-sigma modulator
- Enhanced anti-cycle slip Fastlock circuitry
- Fastlock, cycle slip reduction, and integrated timeout counters
- Digital lock detect output
- Prescalers allow a wide range of N values
- On-chip crystal reference frequency doubler
- Hardware and software power-down control
- Ultra-low power consumption: ICC = 4.1 mA (typical)
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 LMX2470SLEX?
The LMX2470SLEX is a low-power, high-performance delta-sigma fractional-N PLL with an auxiliary integer-N PLL.
- Who manufactures the LMX2470SLEX?
The LMX2470SLEX is manufactured by Texas Instruments.
- What is the package type and pin count of the LMX2470SLEX?
The LMX2470SLEX is available in a 24-lead ULGA (NPF) package.
- What is the operating temperature range of the LMX2470SLEX?
The operating temperature range is -40°C to 85°C.
- What is the typical current consumption of the LMX2470SLEX?
The typical current consumption is 4.1 mA at 2.5 V.
- What are the key features of the LMX2470SLEX?
Key features include low in-band phase noise, low fractional spurs, selectable fractional modulus, programmable delta-sigma modulator, and enhanced Fastlock circuitry.
- What are the common applications of the LMX2470SLEX?
Common applications include cellular phones and base stations, satellite and cable TV tuners, WLAN standards, and applications requiring fine frequency resolution.
- How is the LMX2470SLEX programmed?
Programming is done via a three-line MICROWIRE interface (Data, Clock, Load Enable).
- What is the crystal reference frequency range of the LMX2470SLEX?
The crystal reference frequency can be up to 110 MHz.
- Is the LMX2470SLEX still in production?
No, the LMX2470SLEX has been discontinued by Texas Instruments.
