National Semiconductor LMX2522, LMX2532 Technical data
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LMX2522/LMX2532
LMX2522/LMX2532 PLLatinum Dual Frequency Synthesizer System with Integrated VCOs
June 2003
PLLatinum
™
Frequency Synthesizer System with
Integrated VCOs
General Description
LMX2522 and LMX2532 are highly integrated, high performance, low power frequency synthesizer systems optimized
for Korean PCS (K-PCS) with GPS and Korean Cellular
(K-Cellular) with GPS, CDMA (1xRTT, IS-95) mobile handsets. Using a proprietary digital phase locked loop technique, LMX2522 and LMX2532 generate very stable, low
noise local oscillator signals for up and down conversion in
wireless communications devices.
LMX2522 and LMX2532 include a RF voltage controlled
oscillator (VCO), a GPS 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 and GPS synthesizer system.
LMX2522 supports the Korean PCS band with GPS and
LMX2532 supports the Korean Cellular band with GPS.
LMX2522 and LMX2532 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, LMX2522 and LMX2532 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.
LMX2522 and LMX2532 are available in a 28-pin leadless
leadframe package (LLP).
Features
n Small Size
Small 5.0 mm x 5.0 mm x 0.75 mm 28-Pin LLP Package
n RF/GPS Synthesizer System
Integrated RF VCO
Integrated GPS VCO
Integrated Loop Filter
Low Spurious, Low Phase Noise Fractional-N RF PLL
Based on 11-bit Delta Sigma Modulator
10 kHz Frequency Resolution
n IF Synthesizer System
Integer-N IF PLL
Programmable Charge Pump Current Levels
Programmable Frequencies
n Supports Various Reference Oscillator Frequencies
19.20/19.68 MHz
n Fast Lock Time: 500 µs
n Low Current Consumption
17 mA at 2.8 V
n 2.7 V to 3.3 V Operation
n Digital Filtered Lock Detect Output
n Hardware and Software Power Down Control
Applications
n Korean PCS CDMA Systems with GPS
n Korean Cellular CDMA Systems with GPS
Functional Block Diagram
20067201
PLLatinum is a trademark of National Semiconductor Corporation.
© 2003 National Semiconductor Corporation DS200672 www.national.com
Connection Diagram
LMX2522/LMX2532
28-Pin LLP (LQ) Package
NOTE: Analog ground connected through exposed die attached pad.
Pin Descriptions
Pin Number Name I/O Description
1 CPout O IF PLL charge pump output
2 NC — Do not connect to any node on printed circuit board.
3 NC — Do not connect to any node on printed circuit board.
4V
5 LE I MICROWIRE Latch Enable
6 CLK I MICROWIRE Clock
7 DATA I MICROWIRE Data
8V
9 NC — Do not connect to any node on printed circuit board.
10 NC — Do not connect to any node on printed circuit board.
11 NC — Do not connect to any node on printed circuit board.
12 NC — Do not connect to any node on printed circuit board.
13 V
14 V
15 RFout O Buffered VCO output
16 V
17 V
18 V
19 LD O Lock Detect
20 CE I Chip Enable control pin
21 GND — Ground for digital circuitry
22 OSCin I Reference frequency input
23 V
24 GND — Ground for digital circuitry
25 V
26 Fin I IF buffer/prescaler input
27 V
28 NC — Do not connect to any node on printed circuit board.
DD
DD
DD
DD
CC
CC
CC
CC
CC
CC
20067202
— Supply voltage for IF analog circuitry
— Supply voltage for VCOs
— Supply voltage for VCOs
— Supply voltage for VCOs output buffer
— Supply voltage for RF prescaler
— Supply voltage for charge pump
— Supply voltage for RF digital circuitry
— Supply voltage for reference input buffer
— Supply voltage for IF digital circuitry
— Supply voltage for IF buffer/prescaler
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Ordering Information
LMX2522/LMX2532
Part Number RF Min.
(MHz)
LMX2522LQX1635 1619.62 1649.62
LMX2522LQ1635 1619.62 1649.62
LMX2532LQX0967 954.42 979.35
LMX2532LQ0967 954.42 979.35
LMX2532LQX1065 1052.64 1077.57
LMX2532LQ1065 1052.64 1077.57
Part Number Description
RF Max.
(MHz)
RF Center
(MHz)
~
1635 440.76 1355.04 25221635 4500 units on
~
1635 440.76 1355.04 25221635 1000 units on
~
967 170.76 1490.04 25320967 4500 units on
~
967 170.76 1490.04 25320967 1000 units on
~
1065 367.20 1391.82 25321065 4500 units on
~
1065 367.20 1391.82 25321065 1000 units on
IF
(MHz)
GPS
(MHz)
Package
Marking
20067203
Supplied As
tape and reel
tape and reel
tape and reel
tape and reel
tape and reel
tape and reel
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Absolute Maximum Ratings (Notes 1,
2, 3)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Parameter Symbol Ratings Units
LMX2522/LMX2532
Supply Voltage V
Voltage on any pin
to GND
Storage Temperature
Range
CC,VDD
V
I
T
STG
-0.3 to 3.6 V
-0.3toVDD+0.3 V
-0.3toV
CC
-65 to 150 ˚C
+0.3 V
Recommended Operating
Conditions
Parameter Symbol Min Typ Max Units
Ambient Temperature T
Supply Voltage (to GND) V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to
the device may occur. Recommended Operating Conditions indicate conditions for which the device is intended to be functional, but do not guarantee
specific performance limits. For guaranteed specifications and test conditions, refer to the Electrical Characteristics section. The guaranteed specifications apply only for the conditions listed.
Note 2: This device is a high performance RF integrated circuit with an ESD
<
rating
2 kV and is ESD sensitive. Handling and assembly of this device
should be done at ESD protected work stations.
Note 3: GND=0V.
A
CC,VDD
-30 25 85 ˚C
2.7 3.3 V
Electrical Characteristics (V
CC=VDD
= 2.8 V, TA= 25 ˚C; unless otherwise noted.)
Symbol Parameter Conditions Min Typ Max Units
I
PARAMETERS
CC
I
CC+IDD
(I
+
CC
I
DD)RF
I
PD
Total Supply Current OB_CRL [1:0] = 00 17 19 mA
RF PLL Total Supply Current OB_CRL [1:0] = 00 16 18 mA
Power Down Current (Note 4) CE = Low or
20 µA
RF_EN = 0
IF_EN = 0
REFERENCE OSCILLATOR
f
OSCin
V
OSCin
Reference Oscillator Input Frequency
(Note 5)
Reference Oscillator Input sensitivity 0.2 V
19.20 MHz and 19.68
MHz are supported
19.20 19.68 MHz
CC
V
P-P
RF VCO
f
RFout
Frequency Range
(Note 6)
LMX2522LQ1635 RF VCO 1619.62 1649.62 MHz
LMX2532LQ0967 954.42 979.35 MHz
LMX2532LQ1065 1052.64 1077.57 MHz
p
RFout
RF Output Power OB_CRL [1:0] = 11 -2 1 4 dBm
OB_CRL [1:0] = 10 -5 -2 1 dBm
OB_CRL [1:0] = 01 -7 -4 -1 dBm
OB_CRL [1:0] = 00 -9 -6 -3 dBm
Lock Time (Note 7) LMX2522LQ1635 30 MHz Band for RF
500 800 µs
PLL
LMX2532LQ0967 25 MHz Band for RF
500 800 µs
PLL
LMX2532LQ1065 25 MHz Band for RF
500 800 µs
PLL
Reference Spurs -75 dBc
RMS Phase Error RF PLL in all band 1.3 degrees
L(f) Phase Noise LMX2522LQ1635
LMX2532LQ0967
LMX2532LQ1065
@
100 kHz offset -113 -112 dBc/Hz
@
1.25 MHz offset -138 -136 dBc/Hz
@
100 kHz offset -117 -115 dBc/Hz
@
900 kHz offset -139 -138 dBc/Hz
@
100 kHz offset -117 -115 dBc/Hz
@
900kHz offset -139 -138 dBc/Hz
2nd Harmonic Suppression -25 dBc
3rd Harmonic Suppression -20 dBc
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LMX2522/LMX2532
Electrical Characteristics (V
CC=VDD
= 2.8 V, TA= 25 ˚C; unless otherwise noted.) (Continued)
Symbol Parameter Conditions Min Typ Max Units
GPS VCO
f
RFout
Operating Frequency LMX2522LQ1635 GPS VCO 1355.04 MHz
LMX2532LQ0967 1490.04 MHz
LMX2532LQ1065 1391.82 MHz
p
RFout
Output Power OB_CRL [1:0] = 11 -2 1 4 dBm
OB_CRL [1:0] = 10 -5 -2 1 dBm
OB_CRL [1:0] = 01 -7 -4 -1 dBm
OB_CRL [1:0] = 00 -9 -6 -3 dBm
Lock Time (Note 7) From RF to GPS PLL 600 800 µs
Reference Spurs -75 dBc
RMS Phase Error RF PLL in all band 1.3 degrees
L(f) Phase Noise
@
100 kHz offset -113 -112 dBc/Hz
@
1.25 MHz offset -138 -136 dBc/Hz
2nd Harmonic Suppression -25 dBc
3rd Harmonic Suppression -20 dBc
IF PLL
f
Fin
Operating Frequency
(Note 8)
LMX2522LQ1635 IF_FREQ [1:0] = 10,
Default Value
LMX2532LQ0967 IF_FREQ [1:0] = 00,
440.76 MHz
170.76 MHz
Default Value
LMX2532LQ1065 IF_FREQ [1:0] = 01,
367.20 MHz
Default Value
p
f
ΦIF
I
CPout
Fin
IF Input Sensitivity -10 0 dBm
Phase Detector Frequency 120 kHz
Charge Pump Current IF_CUR [1:0] = 00 100 µA
IF_CUR [1:0] = 01 200 µA
IF_CUR [1:0] = 10 300 µA
IF_CUR [1:0] = 11 800 µA
DIGITAL INTERFACE (DATA, CLK, LE, LD, CE)
V
IH
V
IL
I
IH
I
IL
High-Level Input Voltage 0.8 V
0.8 V
DD
CC
Low-Level Input Voltage 0 0.2 V
0 0.2 V
V
DD
V
CC
DD
CC
High-Level Input Current -10 10 µA
Low-Level Input Current -10 10 µA
V
V
V
V
Input Capacitance 3 pF
V
OH
V
OL
High-Level Output Voltage 0.9 V
0.9 V
DD
CC
Low-Level Output Voltage 0.1 V
0.1 V
V
V
DD
CC
V
V
Output Capacitance 5pF
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Electrical Characteristics (V
CC=VDD
= 2.8 V, TA= 25 ˚C; unless otherwise noted.) (Continued)
Symbol Parameter Conditions Min Typ Max Units
MICROWIRE INTERFACE TIMING
t
CS
t
CH
LMX2522/LMX2532
t
CWH
t
CWL
t
ES
t
EW
Note 4: In power down mode, set DATA, CLK and LE pins to 0 V (GND).
Note 5: The reference frequency must also be programmed using the OSC_FREQ control bit. For other reference frequencies, please contact National
Semiconductor.
Note 6: For other frequency ranges, please contact National Semiconductor.
Note 7: Lock time is defined as the time difference between the beginning of the frequency transition and the point at which the frequency remains within +/- 1 kHz
of the final frequency.
Note 8: Frequencies other that the default value can be programmed using Words R4 and R5. See Programming Description for details.
Data to Clock Set Up Time 50 ns
Data to Clock Hold Time 10 ns
Clock Pulse Width High 50 ns
Clock Pulse Width Low 50 ns
Clock to Latch Enable Set Up Time 50 ns
Latch Enable Pulse Width 50 ns
Serial Data Input Timing
20067204
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