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LMX2541SQ3030E Datasheet(PDF) 10 Page - Texas Instruments

Part # LMX2541SQ3030E
Description  LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LMX2541SQ3030E Datasheet(HTML) 10 Page - Texas Instruments

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tCES
tCS
D19
D18
D17
D16
tCH
tCWH
tCWL
D15
D0
C3
C2
C1
C0
MSB
LSB
DATA
CLK
LE
tES
tEWH
LMX2541SQ2060E, LMX2541SQ2380E
LMX2541SQ2690E, LMX2541SQ3030E
LMX2541SQ3320E, LMX2541SQ3740E
SNOSB31I – JULY 2009 – REVISED FEBRUARY 2013
www.ti.com
Electrical Characteristics (continued)
(3.15 V
≤ VCC ≤ 3.45 V, -40°C ≤ TA ≤ 85 °C; except as specified. Typical values are at Vcc = 3.3 V, 25 C.)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
10 kHz Offset
-83.9
100 kHz Offset
-108.3
fRFout =
Min VCO
1 MHz Offset
-129.9
Frequency
10 MHz offset
-150.6
20 MHz Offset
-156.5
Phase Noise
L(f)Fout
dBc/Hz
3740E
10 kHz Offset
-81.6
100 kHz Offset
-106.5
fRFout =
Max VCO
1 MHz Offset
-127.7
Frequency
10 MHz Offset
-148.6
20 MHz Offset
-154.2
Digital Interface (DATA, CLK, LE, CE, Ftest/LD, FLout,RFoutEN)
VIH
High-Level Input Voltage
1.6
Vcc
V
VIL
Low-Level Input Voltage
0.4
V
IIH
High-Level Input Current
VIH = 1.75, XO = 0
-5
5
µA
IIL
Low-Level Input Current
VIL = 0 V , XO = 0
-5
5
µA
VOH
High-Level Output Voltage
IOH = 500 µA
2.0
V
VOL
Low-Level Output Voltage
IOL = -500 µA
0.0
0.4
V
ILeak
Leakage Current
Ftest/LD and FLout Pins Only
-5
5
µA
MICROWIRE Timing
tCE
Clock to Enable Low Time
See Data Input Timing
25
ns
tCS
Data to Clock Set Up Time
See Data Input Timing
25
ns
tCH
Data to Clock Hold Time
See Data Input Timing
20
ns
tCWH
Clock Pulse Width High
See Data Input Timing
25
ns
tCWL
Clock Pulse Width Low
See Data Input Timing
25
ns
tCES
Enable to Clock Set Up Time
See Data Input Timing
25
ns
tEWH
Enable Pulse Width High
See Data Input Timing
25
ns
Serial Data Timing Diagram
There are several other considerations for programming:
The DATA is clocked into a shift register on each rising edge of the CLK signal. On the rising edge of the LE
signal, the data is sent from the shift registers to an actual counter.
A slew rate of at least 30 V/
μs is recommended for the CLK, DATA, and LE signals.
After the programming is complete, the CLK, DATA, and LE signals should be returned to a low state.
When using the part in Full Chip Mode with the Integrated VCO, LE should be kept high no more than 1 us
after the programming of the R0 register. Failure to do so may interfere with the digital VCO calibration.
If the CLK and DATA lines are toggled while the in VCO is in lock , as is sometimes the case when these
lines are shared with other parts, the phase noise may be degraded during the time of this programming.
10
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Copyright © 2009–2013, Texas Instruments Incorporated
Product Folder Links: LMX2541SQ2060E LMX2541SQ2380E LMX2541SQ2690E LMX2541SQ3030E
LMX2541SQ3320E LMX2541SQ3740E


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