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| 型号： | LT1256CS#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 19/24页 |
| 文件大小： | 0K |
| 描述： | IC AMP VIDEO FADE CONTRLD 14SOIC |
| 标准包装： | 2,500 |
| 应用： | 电流反馈 |
| 电路数： | 1 |
| -3db带宽： | 40MHz |
| 转换速率： | 300 V/µs |
| 电流 - 电源： | 14.5mA |
| 电流 - 输出 / 通道： | 40mA |
| 电压 - 电源，单路/双路(±)： | 5 V ~ 30 V，±2.5 V ~ 15 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SOIC |
| 包装： | 带卷 (TR) |
4
LT1251/LT1256
SIG AL A PLIFIER DC CHARACTERISTICS
U
W
0
°C ≤ TA ≤ 70°C, VS = ±5V, VCM = 0V, VFS = 2.5V, IC = IFS = NULL = Open, Pins 5,10 = GND, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
AVOL
Large-Signal Voltage Gain
VO = – 3V to 3V, RL = 150
83
93
dB
VO = – 2.75V to 2.75V, RL = 150
q
83
dB
ROL
Transresistance,
VOUT/IIN–
VO = – 3V to 3V, RL = 150
0.75
1.8
M
VO = – 2.75V to 2.75V, RL = 150
q
0.75
M
VOUT
Maximum Output Voltage Swing
No Load
q
±4.0
±4.2
V
RL = 150
±3.0
±3.5
V
q
±2.75
V
VS = ±15V, No Load
q
±14.0
±14.2
V
VS = 5V, VCM = 2.5V, (Note 6)
q
1.2
3.8
V
IO
Maximum Output Current
VS = ±5V
q
±30
±40
mA
VS = 5V, VCM = VO = 2.5V
q
±20
±30
mA
IS
Supply Current
VC = VFS = 2.5V
q
13.5
17.0
mA
VC = VFS = 1.25V
q
7.5
9.5
mA
VC = VFS = 0V
q
1.3
1.8
mA
VC = VFS = 2.5V, VS = ±15V
q
14.5
18.5
mA
VC = VFS = 0V, VS = ±15V
q
1.4
2.0
mA
CO TROL A D FULL SCALE A PLIFIER CHARACTERISTICS
U
W
0
°C ≤ TA ≤ 70°C, VS = ±5V, VFS = 2.5V, IC = IFS = NULL = Open, Pins 5,10 = GND, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Control Amplifier Input Offset Voltage
Pin 4 to Pin 3
q
515
mV
Full-Scale Amplifier Input Offset Voltage
Pin 11 to Pin 12
q
515
mV
Control Amplifier Input Resistance
q
25
100
M
Full-Scale Amplifier Input Resistance
q
25
100
M
Control Amplifier Input Bias Current
q
– 750
– 300
nA
Full-Scale Amplifier Input Bias Current
q
– 750
– 300
nA
RC
Internal Control Resistor
TA = 25°C
3.75
5
6.25
k
RFS
Internal Full-Scale Resistor
TA = 25°C
456
k
Resistor Temperature Coefficient
0.2
%/
°C
Control Path Bandwidth
Small Signal, VC = 100mV, (Note 7)
10
MHz
Control Path Rise and Fall Time
Small Signal, VC = 100mV, (Note 7)
35
ns
Control Path Transition Time
0% to 100%
150
ns
Control Path Propagation Delay
Small Signal,
VC = 100mV
50
ns
VC from 0% or 100%
90
ns
The q denotes specifications which apply over the specified operating
temperature range.
Note 1: A heat sink may be required depending on the power supply
voltage.
Note 2: Commercial grade parts are designed to operate over the
temperature range of – 40
°C to 85°C but are neither tested nor guaranteed
beyond 0
°C to 70°C. Industrial grade parts specified and tested over
–40
°C to 85°C are available on special request. Consult factory.
Note 3: TJ is calculated from the ambient temperature TA and the power
dissipation PD according to the following formulas:
LT1251CN/LT1256CN:
TJ = TA + (PD 70°C/W)
LT1251CS/LT1256CS:
TJ = TA + (PD 100°C/W)
Note 4: Differential gain and phase are measured using a Tektronix
TSG120YC/NTSC signal generator and a Tektronix 1780R Video
Measurement Set. The resolution of this equipment is 0.1% and 0.1
°. Five
identical amplifier stages were cascaded giving an effective resolution of
0.02% and 0.02
°.
Note 5: Differential gain and phase are best when the control is set at 0%
or 100%. See the Typical Performance Characteristics curves.
Note 6: Tested with RL = 150 to 2.5V to simulate an AC coupled load.
Note 7: Small-signal control path response is measured driving RC (Pin 5)
to eliminate peaking caused by stray capacitance on Pin 4.
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