LMX2332L National Semiconductor, LMX2332L Datasheet

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LMX2332L

Manufacturer Part Number
LMX2332L
Description
(LMX2330L - LMX2332L) PLLatinumTM Low Power Dual Frequency Synthesizer
Manufacturer
National Semiconductor
Datasheet

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www.DataSheet4U.com
© 2001 National Semiconductor Corporation
LMX2330L/LMX2331L/LMX2332L
PLLatinum
RF Personal Communications
LMX2330L 2.5 GHz/510 MHz
LMX2331L 2.0 GHz/510 MHz
LMX2332L 1.2 GHz/510 MHz
General Description
The LMX233XL family of monolithic, integrated dual fre-
quency synthesizers, including prescalers, is to be used as a
local oscillator for RF and first IF of a dual conversion
transceiver. It is fabricated using National’s 0.5µ ABiC V
silicon BiCMOS process.
The LMX233XL contains dual modulus prescalers. A 64/65
or a 128/129 prescaler (32/33 or 64/65 in the 2.5 GHz
LMX2330L) can be selected for the RF synthesizer and a 8/9
or a 16/17 prescaler can be selected for the IF synthesizer.
LMX233XL, which employs a digital phase locked loop tech-
nique, combined with a high quality reference oscillator,
provides the tuning voltages for voltage controlled oscillators
to generate very stable, low noise signals for RF and IF local
oscillators. Serial data is transferred into the LMX233XL via
a three wire interface (Data, Enable, Clock). Supply voltage
can range from 2.7V to 5.5V. The LMX233XL family features
very low current consumption;
LMX2330L — 5.0 mA at 3V, LMX2331L — 4.0 mA at 3V,
LMX2332L — 3.0 mA at 3V.
The LMX233XL are available in a TSSOP 20-pin, CSP
24-pin surface mount plastic package, and thin CSP 20-pin
surface mount plastic package.
Functional Block Diagram
Low Power Dual Frequency Synthesizer for
DS012806
Features
n Ultra low current consumption
n 2.7V to 5.5V operation
n Selectable synchronous or asynchronous powerdown
n Dual modulus prescaler:
n Selectable charge pump TRI-STATE
n Selectable charge pump current levels
n Selectable Fastlock
n Upgrade and compatible to LMX233XA family
Applications
n Portable Wireless Communications
n Cordless and cellular telephone systems
n Wireless Local Area Networks (WLANs)
n Cable TV tuners (CATV)
n Other wireless communication systems
mode:
I
(PCS/PCN, cordless)
CC
LMX2330L
LMX2331L/32L
LMX2330L/31L/32L (IF) 8/9 or 16/17
= 1 µA typical at 3V
mode
(RF) 32/33 or 64/65
(RF) 64/65 or 128/129
01280601
®
mode
October 2001
www.national.com

Related parts for LMX2332L

LMX2332L Summary of contents

Page 1

... The LMX233XL family features very low current consumption; LMX2330L — 5 3V, LMX2331L — 4 3V, LMX2332L — 3 3V. The LMX233XL are available in a TSSOP 20-pin, CSP 24-pin surface mount plastic package, and thin CSP 20-pin surface mount plastic package. ...

Page 2

... NS Package Number SLB24A 20-Pin Thin Chipscale Package (SLD) (Top View) Order Number LMX2330LSLDX, LMX2331LSLDX, or LMX2332LSLDX NS Package Number SLD20A www.national.com Thin Shrink Small Outline Package (TM) Order Number LMX2330LTM, LMX2331LTM or Order Number LMX2330LTMX, LMX2331LTMX Package Number MTC20 01280639 01280640 2 (Top View) 01280602 LMX2332LTM LMX2332LTMX ...

Page 3

Pin Descriptions Pin No. Pin No. Pin No. LMX233XLSLD LMX233XLSLB LMX233XLTM www.DataSheet4U.com 20-pin Thin 24-pin CSP 20-pin TSSOP CSP Package Package Package ...

Page 4

Block Diagram www.DataSheet4U.com Note: The RF prescaler for the LMX2331L/32L is either 64/65 or 128/129, while the prescaler for the LMX2330L is 32/33 or 64/65. Note supplies power to the RF prescaler, N-counter, R-counter and phase detector. V ...

Page 5

... ESD sensitive. Handling and assembly of this device +260˚C should only be done at ESD protected work stations. < 85˚C, except as specified Conditions LMX2330L 2.7V to 5.5V CC LMX2330L RF Only LMX2331L LMX2331L RF Only LMX2332L LMX2332L RF Only LMX233xL IF Only (Note 3) LMX2330L LMX2331L LMX2332L LMX233xL 5.0V ...

Page 6

Electrical Characteristics V = 3.0V 3.0V; −40˚ Symbol www.DataSheet4U.com t Clock Pulse Width High CWH t Clock Pulse Width Low CWL t Clock to Load Enable Set Up Time ES t Load Enable Pulse Width EW ...

Page 7

Charge Pump Current Specification Definitions www.DataSheet4U.com sink current − sink current sink current ...

Page 8

... RF Sensitivity Test Block Diagram www.DataSheet4U.com Note 10,000 Note 2: Sensitivity limit is reached when the error of the divided RF output, F Typical Performance Characteristics LMX2330L LMX2332L www.national.com LD Hz 01280619 CC 01280621 8 01280638 LMX2331L 01280620 I TRI-STATE ...

Page 9

Typical Performance Characteristics Charge Pump Current HIGH www.DataSheet4U.com CP Charge Pump Current Variation (See (Note 6) under Charge Pump Current Specification Definitions) (Continued) Voltage Charge Pump Current 01280623 (See (Note 7) under Charge ...

Page 10

Typical Performance Characteristics RF Input Impedance V = 2.7V to 5.5V, f www.DataSheet4U.com CC www.national.com (Continued MHz to 3 GHz IN 01280627 10 IF Input Impedance V = 2.7V to 5.5V MHz to 1000 MHz ...

Page 11

Typical Performance Characteristics LMX233xSLD RF Input Impedance V = 2.7V to 5.5V 500 MHz to 3 GHz, f www.DataSheet4U.com CC IN 100 pF Marker 1 = 500 MHz, Real = 202.98, Imaginary = −200.09 Marker 2 = 1.8 ...

Page 12

... Typical Performance Characteristics LMX2332L RF Sensitivity vs Frequency www.DataSheet4U.com Oscillator Input Sensitivity vs Frequency Functional Description The simplified block diagram below shows the 22-bit data register, two 15-bit R Counters and the 15- and 18-bit N Counters (intermediate latches are not shown). The data stream is clocked (on the rising edge of Clock) into the DATA register, MSB first. ...

Page 13

Functional Description www.DataSheet4U.com PROGRAMMABLE REFERENCE DIVIDERS (IF AND RF R COUNTERS) If the Control Bits are (00 for IF and 01 for RF) data is transferred from the 22-bit shift register into a latch which sets the ...

Page 14

Functional Description www.DataSheet4U.com 7-BIT SWALLOW COUNTER DIVIDE RATIO (A COUNTER) RF Divide Ratio • • • 127 Notes: Divide ratio ...

Page 15

Functional Description PROGRAMMABLE MODES Several modes of operation can be programmed with bits R16–R20 including the phase detector polarity, charge pump www.DataSheet4U.com TRI-STATE and the output of the F LD pin. The prescaler and powerdown modes are selected with bits ...

Page 16

Functional Description RF R[19] IF R[19] www.DataSheet4U.com (RF LD) (IF LD don’t care condition ...

Page 17

Functional Description SERIAL DATA INPUT TIMING www.DataSheet4U.com Note 1: Parenthesis data indicates programmable reference divider data. Data shifted into register on clock rising edge. Data is shifted in MSB first. Note Data to Clock Set-Up Time cs ...

Page 18

Typical Application Example www.DataSheet4U.com Operational Notes: * VCO is assumed AC coupled increases impedance so that VCO output power is provided to the load rather than the PLL. Typical values are 10 IN power level impedance ...

Page 19

Application Information A block diagram of the basic phase locked loop is shown in Figure 1 . www.DataSheet4U.com FIGURE 1. Basic Charge Pump Phase Locked Loop LOOP GAIN EQUATIONS A linear control system model of the phase feedback for a ...

Page 20

Application Information margin. This implies that another resistor of equal value to R2 will need to be switched in parallel with R2 during the www.DataSheet4U.com initial lock period. We must also insure that the magnitude of the open loop gain, ...

Page 21

... Physical Dimensions inches (millimeters) unless otherwise noted www.DataSheet4U.com 20-Lead (0.173" Wide) Thin Shrink Small Outline Package (TM) Order Number LMX2330LTM, LMX2331LTM or LMX2332LTM Order Number LMX2330LTMX, LMX2331LTMX or LMX2332LTMX * For Tape and Reel (2500 units per reel) NS Package Number MTC20 21 www.national.com ...

Page 22

... Physical Dimensions www.DataSheet4U.com Order Number LMX2330LSLBX, LMX2331LSLBX or LMX2332LSLBX www.national.com inches (millimeters) unless otherwise noted (Continued) 24-Pin Chip Scale Package For Tape and Reel (2500 Units per Reel) NS Package Number SLB24A 22 ...

Page 23

... Physical Dimensions www.DataSheet4U.com Order Number LMX2330LSLDX, LMX2331LSLDX or LMX2332LSLDX LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or ...

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