LMX2512 System Datasheet

LMX2512 Datasheet PDF, Equivalent


Part Number

LMX2512

Description

Frequency Synthesizer System

Manufacture

etcTI

Total Page 24 Pages
Datasheet
Download LMX2512 Datasheet


LMX2512
LMX2502, LMX2512
www.ti.com
SNWS010C – MARCH 2003 – REVISED APRIL 2013
LMX2502/LMX2512 PLLatinum™ Frequency Synthesizer System with Integrated VCO
Check for Samples: LMX2502, LMX2512
FEATURES
1
2 Small Size
– 5.0 mm X 5.0 mm X 0.75 mm 28-Pin WQFN
Package
• RF Synthesizer System
– Integrated RF VCO
– Integrated Loop Filter
– Low Spurious, Low Phase Noise Fractional-
N RF PLL Based on 11-Bit Delta Sigma
Modulator
– 10 kHz Frequency Resolution
• IF Synthesizer System
– Integer-N IF PLL
– Programmable Charge Pump Current
Levels
– Programmable Frequency
• Supports Various Reference Frequencies
– 19.20/19.68 MHz
• Fast Lock Time: 500 µs
• Low Current Consumption
– 17 mA at 2.8 V
• 2.7 V to 3.3 V Operation
• Digital Filtered Lock Detect Output
• Hardware and Software Power Down Control
APPLICATIONS
• Korean PCS CDMA Systems
• Korean Cellular CDMA Systems
DESCRIPTION
LMX2502 and LMX2512 are highly integrated, high
performance, low power frequency synthesizer
systems optimized for Korean PCS and Korean
Cellular CDMA (1xRTT, IS-95) mobile handsets.
Using a proprietary digital phase locked loop
technique, LMX2502 and LMX2512 generate very
stable, low noise local oscillator signals for up and
down conversion in wireless communications
devices.
LMX2502 and LMX2512 include a voltage controlled
oscillator (VCO), a loop filter, and a fractional-N RF
PLL based on a delta sigma modulator. In concert
these blocks form a closed loop RF synthesizer
system. LMX2502 supports the Korean PCS band
and LMX2512 supports the Korean Cellular band.
LMX2502 and LMX2512 include an Integer-N IF PLL
also. For more flexible loop filter designs, the IF PLL
includes a 4-level programmable charge pump.
Together with an external VCO and loop filter,
LMX2502 and LMX2512 make a complete closed
loop IF synthesizer system.
Serial data is transferred to the device via a three-
wire MICROWIRE interface (DATA, LE, CLK).
Operating supply voltage ranges from 2.7 V to 3.3 V.
LMX2502 and LMX2512 feature low current
consumption: 17 mA at 2.8 V.
LMX2502 and LMX2512 are available in a 28-pin
WQFN package.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2013, Texas Instruments Incorporated

LMX2512
LMX2502, LMX2512
SNWS010C – MARCH 2003 – REVISED APRIL 2013
Functional Block Diagram
OSCin
RF
Phase
Detector
Loop
Filter
RF VCO
VCC
VDD
CE
CLK
DATA
LE
LD
Power
Down
Control
Serial
Interface
Lock
Detect
Connection Diagram
N/(N+1) Divider
IF R
Divider
Delta Sigma
Control
IF
Phase
Detector
IF N Divider
GND
CPout
NC
NC
VDD
LE
CLK
DATA
1
2
3
4
5
6
7
21 GND
20 CE
19 LD
18 VCC
17 VCC
16 VCC
GND 15 RFout
NOTE: Analog ground connected through exposed die attached pad.
Figure 1. 28-Pin WQFN (NJB) Package
www.ti.com
RFout
CPout
Fin
2 Submit Documentation Feedback
Copyright © 2003–2013, Texas Instruments Incorporated
Product Folder Links: LMX2502 LMX2512


Features LMX2502, LMX2512 www.ti.com SNWS010C MARCH 2003 – REVISED APRIL 2013 L MX2502/LMX2512 PLLatinum™ Frequency S ynthesizer System with Integrated VCO C heck for Samples: LMX2502, LMX2512 FEA TURES 1 •2 Small Size – 5.0 mm X 5. 0 mm X 0.75 mm 28-Pin WQFN Package • RF Synthesizer System – Integrated RF VCO – Integrated Loop Filter – Low Spurious, Low Phase Noise FractionalN RF PLL Based on 11-Bit Delta Sigma Modu lator – 10 kHz Frequency Resolution IF Synthesizer System – Integer-N IF PLL – Programmable Charge Pump Cur rent Levels – Programmable Frequency • Supports Various Reference Frequenc ies – 19.20/19.68 MHz • Fast Lock T ime: 500 µs • Low Current Consumptio n – 17 mA at 2.8 V • 2.7 V to 3.3 V Operation • Digital Filtered Lock De tect Output • Hardware and Software P ower Down Control APPLICATIONS • Kore an PCS CDMA Systems • Korean Cellular CDMA Systems DESCRIPTION LMX2502 and LMX2512 are highly integrated, high performance, low power frequency synthesizer systems optimized for Korean PC.
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