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參數(shù)資料
| 型號(hào)： | LT1457S8#PBF |
| 廠商： | Linear Technology |
| 文件頁(yè)數(shù)： | 7/8頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC PREC OP-AMP JFET DUAL 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 放大器類型： | J-FET |
| 電路數(shù)： | 2 |
| 轉(zhuǎn)換速率： | 4 V/µs |
| 增益帶寬積： | 1.7MHz |
| 電流 - 輸入偏壓： | 7pA |
| 電壓 - 輸入偏移： | 220µV |
| 電流 - 電源： | 1.8mA |
| 電壓 - 電源，單路/雙路(±)： | ±4.5 V ~ 18 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁(yè)面： | 1318 (CN2011-ZH PDF) |
7
LT1457
APPLICATIONS INFORMATION
WU
U
High Speed Operation
When the feedback around the op amp is resisitive (RF), a
pole will be created with RF, the source resistance and
capacitance (RS, CS), and the amplifier input capacitance
(CIN ≈ 4pF). In low closed loop gain configurations and
with RS and RF in the kilohm range, this pole can create
excess phase shift and even oscillation on high speed
amplifiers. Because the LT1457’s phase margin is very
high, this problem is minimal. However, a small capacitor
(CF) in parallel with RF eliminates this problem. With RS(CS
+ CIN) = RFCF, the effect of the feedback pole is completely
removed.
–
+
LT1457 AI04
RS
RF
CF
CS
CIN
OUTPUT
Dimension in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTION
U
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
1
2
3
4
0.150 – 0.157
(3.810 – 3.988)
8
7
6
5
0.189 – 0.197
(4.801 – 5.004)
0.228 – 0.244
(5.791 – 6.197)
0.010 – 0.020
(0.254 – 0.508)
0.016 – 0.050
0.406 – 1.270
× 45°
0°– 8° TYP
0.008 – 0.010
(0.203 – 0.254)
SO8 0392
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
S8 Package
8-Lead Plastic SOIC
N8 Package
8-Lead Plastic DIP
N8 0392
0.045 ± 0.015
(1.143 ± 0.381)
0.100 ± 0.010
(2.540 ± 0.254)
0.065
(1.651)
TYP
0.045 – 0.065
(1.143 – 1.651)
0.130 ± 0.005
(3.302 ± 0.127)
0.020
(0.508)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
0.125
(3.175)
MIN
12
3
4
87
6
5
0.250 ± 0.010
(6.350 ± 0.254)
0.400
(10.160)
MAX
0.009 – 0.015
(0.229 – 0.381)
0.300 – 0.320
(7.620 – 8.128)
0.325
+0.025
–0.015
+0.635
–0.381
8.255
()
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