LMX2314 National Semiconductor Corporation, LMX2314 Datasheet - Page 8

• Manufacturer Part Number: LMX2314
• Description: 1.2 Ghz Frequency Synthesizer For Rf Personal Communications
• Manufacturer: National Semiconductor Corporation

Charge Pump Current Specification Definitions
I1
I2
I3
DV
1 I
2 I
3 I
4 Kw
RF Sensitivity Test Block Diagram
Note 1 N
Note 2 Sensitivity limit is reached when the error of the divided RF output f
e
e
e
D o
D o-sink
D o
e
l
l
CP sink current at V
CP sink current at V
CP sink current at V
I2
I2
vs V
vs T
e
Voltage offset from positive and negative rails Dependent on VCO tuning range relative to V
l
b
l
vs I
l
D o
I1
A
Phase detector charge pump gain constant
e
temp
I2
l
l
I5
e
l
D o-source
10 000 R
e
b
a
l
l
l
Charge Pump Output Current magnitude variation vs Temperature
I3
b
l
I5
Charge Pump Output Current magnitude variation vs Voltage
l
l
l
I2
e
l
I2
e
D o
D o
D o
25 C
l
Charge Pump Output Current Sink vs Source Mismatch
a
50 P
l
e
e
e
I1
l
l l
l
I5
V
V
DV
a
P
P
l
I2
e
b
2
l
I3
64
DV
l
100%
25 C
100% and
l
100% and
e
l
I5
l
I4
l
b
temp
l
I6
l
l
b
OUT
l
I5
8
e
is greater than or equal to 1 Hz
l
I4
25 C
e
e
l
I4
I5
I6
a
e
e
e
l l
l
I6
CP source current at V
CP source current at V
CP source current at V
I5
l
25 C
100%
CC
l
and ground Typical values are between 0 5V and 1 0V
100%
D o
D o
D o
e
e
e
V
V
DV
P
P
b
2
DV
TL W 11766 – 41
TL W 11766 – 42