Datasheet
LMX2541SQ2060E, LMX2541SQ2380E
LMX2541SQ2690E, LMX2541SQ3030E
LMX2541SQ3320E, LMX2541SQ3740E
www.ti.com
SNOSB31I –JULY 2009–REVISED FEBRUARY 2013
Electrical Characteristics (continued)
(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
Charge Pump 0.4 V < V
CPout
< Vcc - 0.4
I
CPout
V 4 %
Current vs. CP Voltage Variation T
A
= 25°C
CP Current vs. Temperature
I
CPout
T V
CPout
= Vcc / 2 8 %
Variation
CPG = 1X -116
Normalized PLL 1/f Noise
dBc/Hz
LN
PLL_flicker
(10 kHz)
CPG = 32X -124.5
LN(f)
(3)
CPG = 1X -220.8
Normalized PLL Noise Floor
dBc/Hz
LN
PLL_flat(1 Hz)
CPG = 32X -225.4
RFout Buffer Enabled and VCO_DIV > 1 400 4000
f
ExtVCOin
PLL Input Frequency MHz
RFout Buffer Disabled and VCO_DIV = 1 400 6000
f
ExtVCOin
≤ 4 GHz -15 10
PLL Input Sensitivity
p
ExtVCOin
dBm
(
(2)
applies to Max Limit Only)
f
ExtVCOin
> 4 GHz -5 10
VCO Specifications
2060E 1990 2240
2380E 2200 2530
Mode = Full Chip Mode
2690E 2490 2865
f
VCO
Internal VCO Frequency Range This is the frequency before the MHz
3030E 2810 3230
VCO divider.
3320E 3130 3600
3740E 3480 4000
Maximum Allowable Temperature
ΔT
CL
(4)
,
(5)
125 °C
Drift for Continuous Lock
2060E 3.5
2380E 2.8
Maximum Frequency
2690E 1.6
RF Output Power
p
RFout
Default Power Mode dBm
(6)
3030E 1.2
VCO_DIV=1
3320E 0.2
3740E - 0.3
Fixed Temperature with 100 MHz frequency change
0.3
at the output
ΔP
RFout
Change in Output Power dB
Fixed frequency with a change over the entire
0.4
temperature range
(3) Consult the Applications Information for more details on these parameters.
(4) Not tested in production. Guaranteed by characterization. OSCin is tested only to 400 MHz.
(5) Maximum Allowable Temperature Drift for Continuous Lock is how far the temperature can drift in either direction from the value it was
at the time that the R0 register was last programmed, and still have the device stay in lock. The action of programming the R0 register,
even to the same value, activates a frequency calibration routine. This implies that the device will work over the entire frequency range,
but if the temperature drifts more than the maximum allowable drift for continuous lock, then it will be necessary to reload the R0 register
to ensure that it stays in lock. Regardless of what temperature the device was initially programmed at, the temperature can never drift
outside the frequency range of -40°C ≤T
A
≤ 85°C without violating specifications.
(6) The measurement of the output power is sensitive to the test circuit. All the numbers in the electrical specifications and typical
performance curves were obtained from a characterization setup that accommodate temperature testing and changing of parts. In a
more optimized setup the measured RF output power is typically on the order of 1.5 to 2.4 dB higher.
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Product Folder Links: LMX2541SQ2060E LMX2541SQ2380E LMX2541SQ2690E LMX2541SQ3030E
LMX2541SQ3320E LMX2541SQ3740E