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參數資料
| 型號： | LM1238AAF/NA |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24 |
| 封裝： | N24D |
| 文件頁數： | 12/24頁 |
| 文件大小： | 1207K |
| 代理商： | LM1238AAF/NA |
Absolute Maximum Ratings (Notes 1, 3)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage, Pins 15 and 19
6.0V
Peak Video DC Output Source Current
(Any One Amp) Pins 18, 19 or 20
1.5 mA
Voltage at Any Input Pin (V
IN)VCC +0.5 > VIN >
0.5V
Thermal Resistance to Ambient (
θ
JA)
51C/W
Power Dissipation (P
D)
(Above 25C Derate Based
on
θ
JA and TJ)
2.4W
Thermal Resistance to case (
θ
JC)
32C/W
Junction Temperature (T
J)
150C
ESD Susceptibility (Note 4)
3.5 kV
Video Inputs
0.0V
PP < VIN <
1.2V
PP
ESD Machine Model (Note 13)
350V
Storage Temperature
65C to +150C
Lead Temperature (Soldering, 10 sec.)
265C
Operating Ratings (Note 2)
Ambient Temperature
Range
0C to +70C
Supply Voltage V
CC
4.75V < V
CC < 5.25V
Video Inputs
0 < V
in
≤ 1.0 V
P-P
Video Signal Electrical Characteristics
Unless otherwise noted: T
A = 25C, VCC = +5.0V, VIN = 0.70 VP-P,VABL =VCC,CL = 8 pF, Video Outputs = 2.0 VP-P. Setting
numbers refer to the definitions in Table 1. See Note 7 for Min and Max parameters and Note 6 for Typicals.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
I
S
Supply Current
Test Setting 1, both supplies, no
output loading. See Note 8.
190
245
mA
I
S-PS
Supply Current, Power Save Mode
Test Setting 1, both supplies, no
output loading. See Note 8.
60
82
mA
V
O BLK
Active Video Black Level Output
Voltage
Test Setting 4, no AC input signal,
DC offset (register 0x8438 set to
0xd5).
1.2
VDC
V
O BLK STEP
Active Video Black Level Step Size
Test Setting 4, no AC input signal.
100
mVDC
V
O Max
Maximum Video Output Voltage
Test Setting 3, Video in = 0.70 V
P-P
3.9
4.3
V
LE
Linearity Error
Test Setting 4, staircase input
signal (see Note 9).
5%
t
r
Video Rise Time
Note 5, 10% to 90%, Test Setting
4, AC input signal.
3.7
ns
OS
R
Rising Edge Overshoot
Note 5, Test Setting 4, AC input
signal.
2%
t
f
Video Fall Time
Note 5, 90% to 10%, Test Setting
4, AC input signal.
3.5
ns
OS
F
Falling Edge Overshoot
Note 5, Test Setting 4, AC input
signal.
2%
BW
Channel bandwidth (3 dB)
Note 5, Test Setting 4, AC input
signal.
110
MHz
V
SEP 10 kHz
Video Amplifier 10 kHz Isolation
Note 14, Test Setting 8.
60
dB
V
SEP 10 MHz
Video Amplifier 10 MHz Isolation
Note 14, Test Setting 8.
50
dB
A
V Max
Maximum Voltage Gain
Test Setting 8, AC input signal.
3.8
4.2
V/V
A
V C-50%
Contrast Attenuation @ 50%
Test Setting 5, AC input signal.
5.2
dB
A
V Min/AV Max
Maximum Contrast Attenuation in
dB
Test Setting 2, AC input signal.
20
dB
A
V G-50%
Gain Attenuation @ 50%
Test Setting 6, AC input signal.
4.2
dB
A
V G-Min
Maximum Gain Attenuation
Test Setting 7, AC input signal.
12
dB
A
V Match
Maximum Gain Match between
channels
Test Setting 3, AC input signal.
±0.5
dB
LM1238
www.national.com
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