NSC LMX2331ATM, LMX2330ATM, LMX2332ATM Datasheet

LMX2330A/LMX2331A/LMX2332A PLLatinum
Dual Frequency Synthesizer for RF
Personal Communications
LMX2330A 2.5 GHz/510 MHz LMX2331A 2.0 GHz/510 MHz LMX2332A 1.2 GHz/510 MHz
General Description
The LMX233xA family of monolithic, integrated dual fre­quency 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 ABiC IV silicon BiCMOS process.
The LMX233xA contains dual modulus prescalers. A 64/65 or a 128/129 prescaler (32/33 or 64/65 in the 2.5 GHz LMX2330A) can be selected for the RF synthesizer and a 8/9 or a 16/17 prescaler can be selected for the IF synthe­sizer.LMX233XA,whichemploysadigitalphaselockedloop technique, combined with a high quality reference oscillator and loop filters, provides the tuning voltages for voltage con­trolled oscillators to generate very stable low noise RF and IF local oscillator signals. Serial data is transferred into the LMX233xA via a three wire interface (Data, Enable, Clock). Supply voltage can range from 2.7V to 5.5V.The LMX233xA family features very low current consumption; LMX2330A—13 mA at 3V, LMX2331A—12 mA at 3V, LMX2332A— 8 mA at 3V.
Features
n 2.7V to 5.5V operation n Low current consumption n Selectable powerdown mode: I n Dual modulus prescaler:
n Selectable charge pump TRI-STATE n Selectable FastLock n Small outline, plastic, surface mount TSSOP 0.173"
wide package
Applications
n Portable Wireless Communications (PCS/PCN, cordless) n Cordless and cellular telephone systems n Wireless Local Area Networks (WLANs) n Cable TV tuners (CATV) n Other wireless communication systems
=
1 µA typical at 3V
CC
LMX2330A (RF) 32/33 or 64/65 LMX2331A/32A (RF) 64/65 or 128/129 LMX2330A/31A/32A (IF) 8/9 or 16/17
mode
®
mode
May 1999
LMX2330A/LMX2331A/LMX2332A PLLatinum Dual Frequency Synthesizer for RF Personal
Communications
Functional Block Diagram
DS012331-1
TRI-STATE®is a registered trademark of National Semiconductor Corporation.
Fastlock
, MICROWIRE™and PLLatinum™are trademarks of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS012331 www.national.com
Connection Diagram
Order Number LMX2330ATM, LMX2331ATM or LMX2332ATM
Pin Description
Thin Shrink Small Outline Package (TM)
DS012331-2
NS Package Number MTC20
Pin No.
1V
2V 3D
Pin
Name
I/O Description
1 Power supply voltage input for RF analog and RF digital circuits. Input may range from 2.7V to
CC
5.5V. V pin and be connected directly to the ground plane.
1 Power Supply for RF charge pump. Must be VCC.
P
RF O Internal charge pump output. For connection to a loop filter for driving the input of an external
o
VCO.
1 must equal VCC2. Bypass capacitors should be placed as close as possible to this
CC
4 GND Ground for RF digital circuitry. 5f 6f
RF I RF prescaler input. Small signal input from the VCO.
IN
RF I RF prescaler complementary input. A bypass capacitor should be placed as close as possible to
IN
this pin and be connected directly to the ground plane. Capacitor is optional with some loss of
sensitivity. 7 GND Ground for RF analog circuitry. 8 OSC
9 GND Ground for IF digital, MICROWIRE
10 F
LD O Multiplexed output of the RF/IF programmable or reference dividers, RF/IF lock detect signals
o
I Oscillator input. The input has a VCC/2 input threshold and can be driven from an external CMOS
in
or TTL logic gate.
and Fastlock mode. CMOS output
,FoLD, and oscillator circuits.
(see Programmable Modes)
.
11 Clock I High impedance CMOS Clock input. Data for the various counters is clocked in on the rising
edge, into the 22-bit shift register.
12 Data I Binary serial data input. Data entered MSB first. The last two bits are the control bits. High
impedance CMOS input.
13 LE I Load enable high impedance CMOS input. When LE goes HIGH, data stored in the shift registers
is loaded into one of the 4 appropriate latches (control bit dependent(.
14 GND Ground for IF analog circuitry. 15 f
IF I IF prescaler complementry input. A bypass capacitor should be placed as close as possible to
IN
this pin and be connected directly to the ground plane. Capacitor is optional with some loss of
sensitivity.
16 f 17 GND Ground for IF digital, MICROWIRE, F 18 D 19 V
IF I IF prescaler input. Small signal input from the VCO.
IN
IF O IF charge pump output. For connection to a loop filter for driving the input of an external VCO.
o
2 Power Supply for IF charge pump. Must be VCC.
P
LD, and oscillator circuits.
o
www.national.com 2
(Continued)
Pin Description (Continued)
Pin No.
20 V
Pin
Name
I/O Description
2 Power supply voltage input for IF analog, IF digital, MICROWIRE, FoLD, and oscillator circuits.
CC
Input may range from 2.7V to 5.5V. V as close as possible to this pin and be connected directly to the ground plane.
Block Diagram
2 must equal VCC1. Bypass capacitors should be placed
CC
Notes:
The RF prescaler for the LMX2331A/32A is either 64/65 or 128/129, while the prescaler for the LMX2330A is 32/33 or 64/65.
1 supplies power to the RF prescaler, N-counter, R-counter and phase detector. VCC2 supplies power to the IF prescaler, N-counter, phase detector,
V
CC
R-counter along with the OSCinbuffer, MICROWIRE, and FoLD. VCC1 and VCC2 are clamped to each other by diodes and must be run at the same voltage level.
1 and VP2 can be run separately as long as VP≥ VCC.
V
P
DS012331-27
www.national.com3
Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Power Supply Voltage
V
CC
V
P
Voltage on Any Pin
with GND=0V (V
) −0.3V to VCC+0.3V
I
Storage Temperature Range (T
) −65˚C to +150˚C
S
−0.3V to +6.5V
−0.3V to +6.5V
Lead Temperature (solder 4 sec.) (T
) +260˚C
L
Recommended Operating Conditions
Power Supply Voltage
V
CC
V
P
Operating Temperature (T
) −40˚C to +85˚C
A
2.7V to 5.5V
VCCto +5.5V
Electrical Characteristics
=
V
CC
Symbol Parameter Conditions
I
CC
I
CC-PWDN
f
RF Operating
IN
f
IF Operating Frequency LMX233XA 45 510 MHz
IN
f
OSC
fφ Phase Detector Frequency 10 MHz Pf
RF RF Input Sensitivity VCC= 3.0V −15 +4 dBm
IN
Pf
IF IF Input Sensitivity VCC= 2.7V to 5.5V −10 +4 dBm
IN
V
OSC
V
IH
V
IL
I
IH
I
IL
I
IH
I
IL
V
OH
V
OL
t
CS
t
CH
t
CWH
t
CWL
t
ES
t
EW
*
Clock, Data and LE. Does not include fINRF, fINIF and OSCIN.
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.Recommended OperatingConditions indicateconditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Char­acteristics. The guaranteed specifications apply only for the test conditions listed.
Note 2: This device is a high performance RF integrated circuit with an ESD rating be done at ESD protected workstations.
3.0V, V
Power Supply Current
=
3.0V; −40˚C
P
<
<
T
85˚C, except as specified
A
LMX2330A RF + IF V LMX2330A RF Only 10 13 LMX2331A RF + IF 12 15.5 LMX2331A RF Only 9 12
Value
Min Typ Max
= 2.7V to 5.5V 13 16.5
CC
Units
mA LMX2332A IF + RF 8 10.5 LMX2332A RF Only 5 7 LMX233XA IF Only 3 3.5
Powerdown Current 125 µA
LMX2330A 0.5 2.5
Frequency
GHzLMX2331A 0.2 2.0
LMX2332A 0.1 1.2
Oscillator Frequency 5 40 MHz
V
= 5.0V −10 +4 dBm
CC
Oscillator Sensitivity OSC
in
High-Level Input Voltage * 0.8 V Low-Level Input Voltage * 0.2 V
0.5 V
CC
CC
PP
V
V High-Level Input Current VIH=VCC= 5.5V* −1.0 1.0 µA Low-Level Input Current VIL= 0V, VCC= 5.5V* −1.0 1.0 µA Oscillator Input Current VIH=VCC= 5.5V 100 µA Oscillator Input Current VIL= 0V, VCC= 5.5V −100 µA High-Level Output Voltage IOH= −500 µA VCC− 0.4 V Low-Level Output Voltage IOL= 500 µA 0.4 V Data to Clock Set Up Time See Data Input Timing 50 ns Data to Clock Hold Time See Data Input Timing 10 ns Clock Pulse Width High See Data Input Timing 50 ns Clock Pulse Width Low See Data Input Timing 50 ns Clock to Load Enable Set Up Time See Data Input Timing 50 ns Load Enable Pulse Width See Data Input Timing 50 ns
<
2 keV and is ESD sensitive. Handling and assembly of this device should only
www.national.com 4
Charge Pump Characteristics
=
V
CC
Symbol Parameter Conditions
I
Do-SOURCE
I
Do-SINK
I
Do-SOURCE
I
Do-SINK
I
Do-TRI
I
Do-SINK
I
Do-SOURCE
I
vs V
D
D
o
I
vs T
D
A
o
**
See PROGRAMMABLE MODES for I
Note 3: See charge pump current specification definitions below. Note 4: See charge pump current specification definitions below. Note 5: See charge pump current specification definitions below.
3.0V, V
vs
o
=
3.0V; −40˚C
P
<
<
T
85˚C, except as specified
A
Charge Pump Output Current V
Charge Pump TRI-STATE Current
CP Sink vs Source Mismatch (Note 4)
CP Current vs Voltage (Note 3)
CP Current vs Temperature (Note 5)
description.
CPo
=VP/2, I
D
o
V
=VP/2, I
D
o
V
=VP/2, I
D
o
V
=VP/2, I
D
o
0.5V V
−40˚c V
=VP/2
D
o
= 25˚C
T
A
0.5V V =
25˚C
T
A
V
=VP/2
D
o
−40˚C
D
o
<
T
A
D
o
<
T
Value
Min Typ Max
= HIGH** −4.5 mA
CP
o
= HIGH** 4.5 mA
CP
o
= LOW** −1.125 mA
CP
o
= LOW** 1.125 mA
CP
o
VP− 0.5V
<
85˚C
−2.5 2.5 nA
310
VP− 0.5V
<
85˚C
A
10 15
10
Units
%
%
%
www.national.com5
Charge Pump Current Specification Definitions
I1=CP sink current at V I2=CP sink current at V I3=CP sink current at V I4=CP source current at V I5=CP source current at V I6=CP source current at V V=Voltage offset from positive and negative rails. Dependent on VCO tuning range relative to V
3. I
4. I
5. I
=
vs V
Do
Do
1
*
[
2
{|I1| − |I3|}]/[1⁄
vs I
Do-sink
Do-source
1
[|I2| − |I5|]/[
2
=
vs T
Do
A
@
[|I2
temp| − |I2@25˚C|]/|I2@25˚C|*100%and [|I5@temp| − |I5@25˚C|]/|I5@25˚C|*100
=
V
V
Do
P
=
/2
V
Do
P
=
V
Do
=
V
V
Do
P
=
/2
V
Do
P
=
V
Do
Charge Pump Output Current magnitude variation vs Voltage
*
2
{|I1| + |I3|}]*100%and [1⁄
=
Charge Pump Output Current Sink vs Source Mismatch
*
{|I2| + |I5|}]*100
Charge Pump Output Current magnitude variation vs Temperature
%
*
2
{|I4| − |I6|}]/[1⁄
*
2
{|I4| + |I6|}]*100
=
%
=
=
RF Sensitivity Test Block Diagram
Note: N=10,000 R=50 P=64 Note: Sensitivity limit is reached when the error of the divided RF output, F
LD, is 1 Hz.
o
DS012331-25
and ground. Typical values are between 0.5V and 1.0V.
CC
%
DS012331-28
www.national.com 6
Loading...
+ 11 hidden pages