Texas Instruments LMX2571 Low-Power Synthesizer
Texas Instruments LMX2571 Low-Power Synthesizer is a low-power, high-performance, wideband PLLatinum™ RF synthesizer. This device integrates a delta-sigma fractional N PLL, multiple core voltage-controlled oscillator (VCO), programmable output dividers, and two output buffers. The VCO cores work up to 5.376GHz resulting in a continuous output frequency range of 10MHz to 1344MHz. This synthesizer can also be used with an external VCO. To that end, a dedicated 5V charge pump and an output divider are available for this configuration. A unique programmable multiplier is also incorporated to help improve spurs. This feature allows the system to use every channel, even if it falls on an integer boundary. The Texas Instruments LMX2571-EP devices have gold bond wires, a temperature range of –55 to +105°C, and an SnPb lead finish.
Features
- Any frequency from 10MHz to 1344MHz
- Low phase noise and spurs
- -123dBc/Hz at 12.5kHz Offset @ 480MHz
- -145dBc/Hz at 1MHz Offset @ 480MHz
- Normalized PLL noise floor of -231dBc/Hz
- Spurious better than -75dBc/Hz
- Fastlock to reduce lock time
- A novel technique to remove integer boundary spurs
- Integrated 5V charge pump and output divider for external VCO operation
- 2-, 4- and 8-level or Arbitrary level direct digital FSK modulation
- One TX/RX Output or two fanout outputs
- Crystal, XO or differential reference clock input
- 24-Bit Fractional-N delta sigma modulator
- Low current consumption
- 39mA Typical synthesizer mode (Int. VCO)
- 9mA Typical PLL mode (Ext. VCO)
Applications
- Duplex mode digital professional 2-way radio
- dPMR, DMR, PDT, P25 Phase I
- Low power radio communication systems
- Satcom modem
- Wireless microphone
- Wireless connectivity
- Handheld test and measurement equipment
Datasheets
TI Reference Design
Development Tool
Texas Instruments LMX2571EVM Evaluation Module (EVM)
Designed to evaluate TI's LMX2571 Low-Power Synthesizer.
Đã phát hành: 2015-04-21
| Đã cập nhật: 2022-10-31