LMX2330L National Semiconductor Corporation, LMX2330L Datasheet

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LMX2330L

Manufacturer Part Number
LMX2330L
Description
Pllatinum? Low Power Dual Frequency Synthesizer For Rf Personal Communications
Manufacturer
National Semiconductor Corporation
Datasheet

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© 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) 64/65 or 128/129
(RF) 32/33 or 64/65
01280601
®
mode
October 2001
www.national.com

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LMX2330L Summary of contents

Page 1

... Enable, Clock). Supply voltage can range from 2.7V to 5.5V. 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 20-pin Thin 24-pin CSP 20-pin TSSOP CSP Package Package Package ...

Page 4

... Block Diagram 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 R-counter along with the OSC buffer, MICROWIRE, and F in Note and V ...

Page 5

... Note 2: This device is a high performance RF integrated circuit with an ESD < rating 2 keV and is 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 ...

Page 6

Electrical Characteristics < 3.0V 3.0V; −40˚ Symbol Parameter t Clock Pulse Width High CWH t Clock Pulse Width Low CWL t Clock to Load Enable Set Up Time ES t Load Enable ...

Page 7

Charge Pump Current Specification Definitions sink current − sink current sink current ...

Page 8

... RF Sensitivity Test Block Diagram 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 LMX2331L 01280619 I TRI-STATE 01280621 8 01280638 01280620 Voltage ...

Page 9

Typical Performance Characteristics Charge Pump Current HIGH 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 Pump ...

Page 10

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

Page 11

... Marker 1 = 500 MHz, Real = 202.98, Imaginary = −200.09 Marker 2 = 1.8 GHz, Real = 32.36, Imaginary = −91.42 Marker 3 = 2.5GHz, Real = 25.51, Imaginary = −46.41 Marker 4 = 3.0 GHz, Real = 30.46, Imaginary = −9.50 LMX2330L RF Sensitivity vs Frequency (Continued) LMX233xSLD IF Input Impedance RF CAP = V = 2.7V to 5.5V 01280641 Marker 1 = 100 MHz, Real = 374.33, Marker 2 = 200 MHz, Real = 257 ...

Page 12

Typical Performance Characteristics LMX2332L RF Sensitivity vs Frequency 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 ...

Page 13

Functional Description 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 15-bit ...

Page 14

... Preset divide ratio of binary 7-bit swallow counter (0 A 127 {RF Output frequency of the external reference frequency oscillator OSC R: Preset divide ratio of binary 15-bit programmable reference counter (3 to 32767) P: Preset modulus of dual moduIus prescaler (for IF 16; for RF; LMX2330L www.national.com (Continued ...

Page 15

Functional Description PROGRAMMABLE MODES Several modes of operation can be programmed with bits R16–R20 including the phase detector polarity, charge pump TRI-STATE and the output of the F LD pin. The prescaler and powerdown modes are selected with bits N19 ...

Page 16

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

Page 17

Functional Description SERIAL DATA INPUT TIMING 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 t ...

Page 18

Typical Application Example 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 ranges ...

Page 19

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

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 initial lock period. We must also insure that the magnitude of the open loop gain, H(s)G(s) ...

Page 21

... Physical Dimensions inches (millimeters) unless otherwise noted 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 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 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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