SNAS187D February 2003 – January 2016 LMX2430 , LMX2433 , LMX2434
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Description continued
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Parameter Measurement Information
-
9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3 Feature Description
- 9.4 Device Functional Modes
- 9.5 Programming
- 9.6
Register Maps
- 9.6.1 Control Register Content Map
- 9.6.2
R0 Register
- 9.6.2.1 RF_R[14:0] - RF Synthesizer Programmable Reference Divider (R Counter) (R0[17:3])
- 9.6.2.2 RF_CPP - RF Synthesizer Phase Detector Polarity (R0[18])
- 9.6.2.3 RF_CPG - RF Synthesizer Charge-Pump Current Gain (R0[19])
- 9.6.2.4 RF_CPT - RF Synthesizer Charge-Pump Tri-State (R0[20])
- 9.6.2.5 RF_RST - RF Synthesizer Counter Reset (R0[21])
- 9.6.3 R1 Register
- 9.6.4
R2 Register
- 9.6.4.1 RF_TOC[0:11] - RF Synthesizer Time-Out Counter (R2[14:3])
- 9.6.4.2
R3 Register
- 9.6.4.2.1 IF_R[14:0] - IF Synthesizer Programmable Reference Divider (R Counter) (R3[17:3])
- 9.6.4.2.2 IF_CPP - IF Synthesizer Phase Detector Polarity (R3[18])
- 9.6.4.2.3 IF_CPG - IF Synthesizer Charge-Pump Current Gain (R3[19])
- 9.6.4.2.4 IF_CPT - IF Synthesizer Charge-Pump Tri-State (R3[20])
- 9.6.4.2.5 IF_RST - IF Synthesizer Counter Reset (R3[21])
- 9.6.5 R4 Register
- 9.6.6 R5 Register
- 9.6.7 MUX[3:0] - Multifunction Output Select (R3[23:22]:R0[23:22])
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
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.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LMX243x | ULGA (20) | 3.50 mm × 3.50 mm |
| TSSOP (20) | 6.50 mm × 4.40 mm |
- 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