參數資料
型號: LMX2346
廠商: National Semiconductor Corporation
英文描述: PLLatinum⑩ Frequency Synthesizer for RF Personal Communications
中文描述: PLLatinum⑩頻率合成射頻個人通信
文件頁數: 6/27頁
文件大?。?/td> 606K
代理商: LMX2346
Electrical Characteristics
(Continued)
The following conditions apply; V
CC
= 3.0V, V
P
= 3.0V; 40C
T
A
85C, unless specified differently.
Symbol
Parameter
LOGICAL INTERFACE (CE, CLOCK, LE, DATA, LD)
V
IH
High-level Input Voltage
V
IL
Low-level Input Voltage
I
IH
High-level Input Current
V
IH
= V
CC
= 5.5V
I
IL
Low-level Input Current
V
IL
= 0V, V
CC
= 5.5V
V
OH
High-level Output Voltage
I
OH
= 500 μA
V
OL
Low-level Output Voltage
I
OL
= 500 μA
MICROWIRE INTERFACE (CLOCK, LE, DATA)
t
CS
Data to Clock Set Up Time
(Note 5)
t
CH
Data to Clock Hold Time
(Note 5)
t
CWH
Clock Pulse Width High
(Note 5)
t
CWL
Clock Pulse Width Low
(Note 5)
t
ES
Clock to Latch Enable Set Up
Time
t
EW
Latch Enable Pulse Width
(Note 5)
PHASE NOISE
L(f)
Single Side-Band Phase Noise
F
IN
= 900 MHz
F
φ
= 200 kHz
F
OSC
= 10 MHz
V
OSC
= 1.0 V
PP
T
A
= 25C
F
IN
= 1750 MHz
F
φ
= 200 kHz
F
OSC
= 10 MHz
V
OSC
= 1.0 V
PP
T
A
= 25C
F
IN
= 1960 MHz
F
φ
= 200 kHz
F
OSC
= 10 MHz
V
OSC
= 1.0 V
PP
T
A
= 25C
F
IN
= 2450 MHz
F
φ
= 200 kHz
F
OSC
= 10 MHz
V
OSC
= 1.0 V
PP
T
A
= 25C
L
N
(f)
Normalized Single Side-Band
Phase Noise
F
OSC
= 10 MHz
V
OSC
= 1.0 V
PP
T
A
= 25C
Conditions
Min
Typ
Max
Units
0.8 V
CC
V
V
μA
μA
V
V
0.2 V
CC
1.0
1.0
1.0
1.0
V
CC
0.4
0.4
50
10
50
50
ns
ns
ns
ns
(Note 5)
50
ns
50
ns
(Note 3)
91
dBc/Hz
(Notes 3, 9)
86
dBc/Hz
(Note 3)
85
dBc/Hz
(Note 3)
83
dBc/Hz
F
φ
= 200 kHz
(Note 8)
164.5
dBc/Hz
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Recommended Operating Conditions indicate conditions for
which the device is intended to be functional. For guaranteed specifications and test conditions see the Electrical Characteristics.
Note 2:
This device is a high performance RF integrated circuit with an ESD rating
<
2 kV. Handling and assembly of this device should only be done at ESD
protected workstations.
Note 3:
Phase Noise is measured using a reference evaluation board with a loop bandwidth of approximately 12 kHz. The phase noise specification is the
composite average of 3 measurements made at frequency offsets of 2.0, 2.5 and 3.0 kHz.
Note 4:
See Charge Pump Measurement Definitions for detail on how these measurements are made.
Note 5:
See Serial Input Data Timing.
Note 6:
See F
IN
Sensitivity Test Setup.
Note 7:
See OSC
in
Sensitivity Test Setup.
Note 8:
Normalized Single-Side Band Phase Noise is defined as: L
N
(f) = L(f) 20 log (F
IN
/ F
φ
), where L(f) is defined as the Single Side-Band Phase Noise.
Note 9:
This parameter is derived from Normalized Single Side-Phase Noise, L
n
(f).
Note 10:
For F
OSC
frequencies below 10 MHz, it is recommended that the rise time of the signal does not exceed 25ns.
L
www.national.com
6
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