LMX243x PLLatinum Dual High-Frequency Synthesizer for RF Personal Communications

1 Features

• Low Current Consumption
  • LMX2430 (RF/IF): 2.8 mA/ 1.4 mA
  • LMX2433 (RF/IF): 3.2 mA/ 2 mA
  • LMX2434 (RF/IF): 4.6 mA/ 2.4 mA
• 2.25-V to 2.75-V Operation
• Synchronous/Asynchronous Power Down
• Multiple PLL Options:
  • LMX2430 (RF/IF): 3 GHz /0.8 GHz
  • LMX2433 (RF/IF): 3.6 GHz /1.7 GHz
  • LMX2434 (RF/IF): 5 GHz /2.5 GHz
• Programmable Charge-Pump Current Levels
  • RF and IF: 1 or 4 mA
• Fastlock With Integrated Time-Out Counters
• Digital Filtered Lock-Detect Output
• Analog Lock Detect (Push-Pull / Open-Drain)
• 1.8-V MICROWIRE Logic Interface

2 Applications

• Mobile Handsets
• Cordless Handsets
• Wireless Data
• Cable TV Tuners

3 Description

Using a proprietary digital-phase, locked-loop technique, the LMX243x devices generate very stable, low-noise control signals for RF and IF voltage controlled oscillators. Both the RF and IF synthesizers include a two-level programmable charge pump. Both the RF and IF PLLs have dedicated fastlock circuitry with integrated time-out counters which require only a single word write to power up or change frequencies.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Functional Block Diagram

NOTE:

1 (2) refers to Pin 1 of the 20-Pin ULGA and Pin 2 of the 20-Pin TSSOP

4 Revision History

Changes from C Revision (March 2013) to D Revision

• Shortened data sheet title LMX243x PLLatinum™ Dual High-Frequency Synthesizer for RF Personal Communications LMX2430 3 GHz/0.8 GHz, LMX2433 3.6 GHz/1.7 GHz, LMX2434 5 GHz/2.5 GHz to LMX243x PLLatinum™ Dual High-Frequency Synthesizer for RF Personal Communications because the extra information is also listed in FeaturesGo
• Added Device Information table, Pin Configuration and Functions section, Thermal Information table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go

Changes from B Revision (March 2013) to C Revision

• Changed layout of National Data Sheet to TI formatGo

5 Description continued

The LMX243x devices are high-performance frequency synthesizers with integrated dual-modulus prescalers. A 32/33 or a 16/17 prescale ratio can be selected for the 5-GHz LMX2434 RF synthesizer. An 8/9 or a 16/17 prescale ratio can be selected for both the LMX2430 and LMX2433 RF synthesizers. The IF circuitry contains an 8/9 or a 16/17 prescaler.

Serial data is transferred to the devices through a three-wire interface (DATA, LE, CLK). A low voltage logic interface allows direct connection to 1.8-V devices. Supply voltages from 2.25 V to 2.75 V are supported.