LMX2320 National Semiconductor, LMX2320 Datasheet - Page 9

• Manufacturer Part Number: LMX2320
• Description: Frequency Synthesizer for RF Personal Communications
• Manufacturer: National Semiconductor

Charge Pump Current Specification Definitions
I1
I2
I3
1 I
2 I
3 I
4 K
RF Sensitivity Test Block Diagram
Note 1 N
Note 2 Sensitivity limit is reached when the error of the divided RF output f
V
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
A
l
D o
I1
e
temp
Phase detector charge pump gain constant
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
l
I3
b
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
e
e
e
l
I1
l
l l
l
I5
V
V
a
P
P
V
l
I2
e
b
2
l
I3
64
l
100%
25 C
V
100% and
l
100% and
e
l
I5
l
I4
l
b
temp
l
I6
l
l
b
OUT
l
I5
9
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
P
P
V
b
2
V
http
TL W 12339– 16
TL W 12339– 17
www national com