LMX2486
SNAS324 –JANUARY 2006
www.ti.com
Electrical Characteristics (continued)
(V
CC
= 3.0V; -40°C ≤ T
A
≤ +85°C unless otherwise specified)
Value
Symbol Parameter Conditions Units
Min Typ Max
RF SYNTHESIZER PARAMETERS
RF_P = 16 1000 4000
Operating
f
FinRF
LMX2486 MHz
Frequency
RF_P = 32 1000 4500
p
FinRF
Input Sensitivity -15 0 dBm
Phase Detector
f
COMP
Frequency 50 MHz
(1)
RF_CPG = 0
95 µA
V
CPoutRF
= V
CC
/2
RF_CPG = 1
RF Charge Pump
190 µA
V
CPoutRF
= V
CC
/2
I
CPoutRF
SRCE Source Current
(2)
... ... µA
RF_CPG = 15
1520 µA
V
CPoutRF
= V
CC
/2
RF_CPG = 0
-95 µA
V
CPoutRF
= V
CC
/2
RF_CPG = 1
RF Charge Pump Sink
-190 µA
V
CPoutRF
= V
CC
/2
I
CPoutRF
SINK Current
(2)
... ... µA
RF_CPG = 15
-1520 µA
V
CPoutRF
= V
CC
/2
RF Charge Pump TRI-
I
CPoutRF
TRI STATE Current 0.5 ≤ V
CPoutRF
≤ V
CC
-0.5 2 10 nA
Magnitude
Magnitude of RF CP RF_CPG > 2 3 10 %
V
CPoutRF
= V
CC
/2
| I
CPoutRF
%MIS | Sink vs. CP Source
T
A
= 25°C
RF_CPG ≤ 2 3 13 %
Mismatch
Magnitude of RF CP 0.5 ≤ V
CPoutRF
≤ V
CC
-0.5
| I
CPoutRF
%V | 2 8 %
Current vs. CP Voltage T
A
= 25°C
Magnitude of RF CP
| I
CPoutRF
%T | V
CPoutRF
= V
CC
/2 4 %
Current vs. Temperature
IF SYNTHESIZER PARAMETERS
IF_P = 8 250 2000
f
FinIF
Operating Frequency MHz
IF_P = 16 250 3000
p
FinIF
IF Input Sensitivity -10 +5 dBm
Phase Detector
f
COMP
10 MHz
Frequency
IF Charge Pump Source
I
CPoutIF
SRCE V
CPoutIF
= V
CC
/2 3.5 mA
Current
IF Charge Pump Sink
I
CPoutIF
SINK V
CPoutIF
= V
CC
/2 -3.5 mA
Current
IF Charge Pump TRI-
I
CPoutIF
TRI STATE Current 0.5 ≤ V
CPoutIF
≤ V
CC
RF -0.5 2 10 nA
Magnitude
Magnitude of IF CP Sink V
CPoutIF
= V
CC
/2
| I
CPoutIF
%MIS | 1 8 %
vs. CP Source Mismatch T
A
= 25°C
Magnitude of IF CP 0.5 ≤ V
CPoutIF
≤ V
CC
-0.5
| I
CPoutIF
%V | 4 10 %
Current vs. CP Voltage T
A
= 25°C
Magnitude of IF CP
| I
CPoutIF
%TEMP| V
CPoutIF
= V
CC
/2 4 %
Current vs. Temperature
(1) For Phase Detector Frequencies above 20 MHz, Cycle Slip Reduction (CSR) may be required. Legal divide ratios are also required.
(2) Refer to table in Section RF_CPG -- RF PLL Charge Pump Gain for complete listing of charge pump currents.
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