Datasheet
LMX2541SQ2060E, LMX2541SQ2380E
LMX2541SQ2690E, LMX2541SQ3030E
LMX2541SQ3320E, LMX2541SQ3740E
SNOSB31I –JULY 2009–REVISED FEBRUARY 2013
www.ti.com
Package Thermal Resistance
Package θ
JA
θ
JC
9 Thermal Vias
31.7 °C/W 7.3 °C/W
(Recommended for Most Reliable Solderability)
13 Thermal Vias
(Compromise Between Solderability, Heat Dissipation, and 30.3 °C/W 7.3 °C/W
Fractional Spurs)
16 Thermal Vias
29.8 °C/W 7.3 °C/W
(Recommended for Optimal Heat Dissipation and Fractional Spurs)
Electrical Characteristics
(3.15 V ≤ V
CC
≤ 3.45 V, -40°C ≤ T
A
≤ 85 °C; except as specified. Typical values are at Vcc = 3.3 V, 25 C.)
Symbol Parameter Conditions Min Typ Max Units
Current Consumption
Default Power VCO_DIV>1 170 204
Entire Chip Supply Current with
I
CC
Mode mA
all blocks enabled
VCO_DIV=1 130 156
(1)
I
PLL
Current for External VCO Mode RFoutEN = LOW 72 94 mA
VCO_DIV >1
I
DIV
Current for Divider Only Mode Default Power Mode 84 110 mA
(1)
I
CC
PD Power Down Current CE = 0 V, Device Initialized 100 250 µA
Oscillator (Normal Mode Operation with XO=0)
Oscillator Input High Current for
I
IH
OSC in V
IH
= 2.75 V 300 µA
OSCin and OSCin*
Oscillator Input Low Current for
I
IL
OSCin V
IL
= 0 -100 µA
OSCin and OSCin* pins
OSC_2X = 1 5 52
OSCin Frequency Range
f
OSCin
MODE = 0 5 700 MHz
(2)
OSC_2X = 0
MODE = 1 5 900
dv
OSCin
Slew Rate
(2)
150 V/µs
Single-Ended 0.2 2.0
v
OSCin
Oscillator Sensitivity dv
OSCin
≥ 150 V/µs Vpp
Differential 0.4 3.1
Oscillator (Crystal Mode with XO=1)
f
XTAL
Crystal Frequency Range V
IH
= 2.75 V 5 20 MHz
Crystal Equivalent Series This a requirement for the crystal, not a characteristic
ESR
XTAL
100 Ω
Resistance of the LMX2541.
This requirement is for the crystal, not a
P
XTAL
Power Dissipation in Crystal 200 µW
characteristic of the LMX2541.
C
OSCin
Input Capacitance of OSCin 6 pF
PLL
f
PD
Phase Detector Frequency 104 MHz
CPG = 1X 100
CPG = 2X 200
Charge Pump
I
CPout
CPG = 3X 300 µA
Output Current Magnitude
... ...
CPG=32X 3200
I
CPout
TRI CP TRI-STATE Current 0.4 V < V
CPout
< Vcc - 0.4 1 5 nA
Charge Pump V
CPout
= Vcc / 2
I
CPout
MM 3 10 %
Sink vs. Source Mismatch T
A
= 25°C
(1) The LMX2541 RFout power level is programmable with the program words of VCOGAIN, OUTTERM, and DIVGAIN. Changing these
words can change the output power of the VCO as well as the current consumption of the output buffer. For the purpose of consistency
in electrical specifications, "Default Power Mode" is defined to be the settings of VCOGAIN = OUTTERM = DIVGAIN = 12.
(2) Not tested in production. Guaranteed by characterization. OSCin is tested only to 400 MHz.
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Product Folder Links: LMX2541SQ2060E LMX2541SQ2380E LMX2541SQ2690E LMX2541SQ3030E
LMX2541SQ3320E LMX2541SQ3740E