參數(shù)資料
型號： LTC1340
廠商： Linear Technology Corporation
英文描述： Low Noise, Voltage-Boosted Varactor Driver(低噪聲，升壓型，變抗器驅(qū)動(dòng)器)
中文描述： 低噪聲，電壓，細(xì)看變?nèi)荻O管驅(qū)動(dòng)器（低噪聲，升壓型，變抗器驅(qū)動(dòng)器）
文件頁數(shù)： 3/8頁
文件大?。?/td> 215K
代理商： LTC1340
3
LTC1340
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
t
START
Charge Pump Start-Up Time
V
RIPPLE
Charge Pump Output Ripple at C
P
f
CP
Charge Pump Frequency
CONDITIONS
C
CP
= 0.1
μ
F, V
CC
= 2.7V, I
OUT
= 0
C
CP
= C
VCC
= 0.1
μ
F, V
CC
= 2.7V, I
OUT
= 0 (Note 2)
(Note 3)
MIN
TYP
1.2
200
4
MAX
5
UNITS
G
ms
μ
V
P-P
MHz
G
2.5
The
G
denotes specifications which apply over the specified temperature
range.
Note 1:
C grade device specifications are guaranteed over the 0
°
C to 70
°
C
temperature range. In addition, C grade device specifications are assured
over the –40
°
C to 85
°
C temperature range by design or correlation, but
are not production tested.
T
A
= 25
°
C, unless otherwise noted. (Note 1)
O
9.4
9.3
9.2
9.1
9.0
8.9
4.9
4.8
4.7
4.6
4.5
4.4
1340 G04
TEMPERATURE (
°
C)
–50
0
–25
25
50
75
100
125
C
OUT
= 1nF
V
IN
= V
SHDN
= V
CC
I
OH
= 0, V
CC
= 5V
I
OH
= 0, V
CC
= 2.7V
I
OH
= 14
μ
A, V
CC
= 5V
I
OH
= 14
μ
A, V
CC
= 2.7V
Output High Voltage vs
Temperature
O
0.5
0.4
0.3
0.2
0.1
0
–50
1340 G05
TEMPERATURE (
°
C)
0
–25
25
50
75
100
125
V
CC
= 2.7V OR 5V
C
OUT
= 1nF
V
IN
= 0V
V
SHDN
= V
CC
I
OL
= 14
μ
A
I
OL
= 0
SUPPLY VOLTAGE (V)
2.5
T
μ
m
3.5
3.0
4.5
4.0
5.5
6.0
5.0
6.5
1340 G06
2100
2050
2000
1950
1900
1850
1800
T
A
= 25
°
C
V
OUT
= 1/2AV
CC
V
SHDN
= V
CC
DC Transfer Curve
INPUT VOLTAGE (V)
0
O
12
11
10
9
8
7
6
5
4
3
2
1
0
1
2
3
4
1340 G01
5
6
V
CC
= 2.7V
V
CC
= 5V
T
A
= 25
°
C
C
OUT
= 1nF
I
OUT
= 0
V
SHDN
= V
CC
V
CC
= 6V
TEMPERATURE (
°
C)
–50
I
0
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
1340 G03
–25
25
50
75
100
125
V
CC
= 2.7V TO 6V
C
OUT
= 1nF
V
SHDN
= V
CC
FREQUENCY (kHz)
1
V
P
20
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
180
144
108
72
36
0
–36
–72
–108
–144
–180
–216
10
100
1000
1340 G02
V
CC
= 2.7V
T
A
= 25
°
C
C
OUT
= 1nF
PHASE
GAIN
Gain and Phase Shift vs
Frequency
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
Input Offset Voltage vs
Temperature
Output Low Voltage vs
Temperature
Transconductance vs
Supply Voltage
Note 2:
The charge pump output ripple is not tested but is correlated with
a PCB ground plane and high quality, low ESR, low ESL metalized
polyester 0.1
μ
F capacitors.
Note 3:
The internal oscillator typically runs at 2MHz, but the charge pump
refreshes the output on both phases of the clock, resulting in an effective
4MHz operating frequency.
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