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LT1122

更新时间： 2024-11-23 14:57:39
品牌 Logo 应用领域
亚德诺 - ADI 放大器运算放大器
页数 文件大小 规格书
14页 267K
描述
快速稳定、JFET 输入运算放大器

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LT1122 数据手册

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LT1122  
Fast Settling, JFET Input  
Operational Amplifier  
FEATURES  
DESCRIPTION  
The LT®1122 JFET input operational amplifier combines  
high speed and precision performance.  
n
100% Tested Settling Time  
to 1mV at Sum Node, 10V Step  
340ns Typ  
540ns Max  
Tested with Fixed Feedback Capacitor  
A unique poly-gate JFET process minimizes gate series  
resistance and gate-to-drain capacitance, facilitating wide  
bandwidth performance, without degrading JFET transis-  
tor matching.  
n
Slew Rate  
60V/µs Min  
14MHz  
n
Gain-Bandwidth Product  
Power Bandwidth (20V  
Unity-Gain Stable; Phase Margin  
Input Offset Voltage  
n
)
P-P  
1.2 MHz  
n
n
n
60°  
It slews at 80V/µs and settles in 340ns. The LT1122 is  
internally compensated to be unity-gain stable, yet it has  
a bandwidth of 14MHz at a supply current of only 7mA. Its  
speed makes the LT1122 an ideal choice for fast settling  
12-bit data conversion and acquisition systems.  
600µV Max  
75pA Max  
600pA Max  
40pA Max  
150pA Max  
Input Bias Current  
Input Offset Current  
Low Distortion  
25°C  
70°C  
25°C  
70°C  
■
■
The LT1122 offset voltage of 120µV, and voltage gain of  
500,000 also support the 12-bit accurate applications.  
APPLICATIONS  
The input bias current of 10pA and offset current of 4pA  
combined with its speed allow the LT1122 to be used in  
such applications as high speed sample and hold ampli-  
fiers, peak detectors, and integrators.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and C-Load  
is a trademark of Linear Technology Corporation. All other trademarks are the property of their  
respective owners.  
n
Fast 12-Bit D/A Output Amplifiers  
n
n
n
n
n
n
n
High Speed Buffers  
Fast Sample-and-Hold Amplifiers  
High Speed Integrators  
Voltage to Frequency Converters  
Active Filters  
Log Amplifiers  
Peak Detectors  
TYPICAL APPLICATION  
12-Bit Voltage Output D/A Converter  
Large-Scale Response  
+
C
F
2
–
+
6
V
0mA TO 2mA  
OR 4mA  
OUT  
LT1122  
0V TO 10V  
3
12-BIT CURRENT OUTPUT D/A CONVERTER  
1122 TA07  
200ns/DIV  
V
C
= 5pF TO 17pF  
F
A
= –1  
LT1122•TA01  
(DEPENDING ON D/A CONVERTER USED)  
1122fb  
1
For more information www.linear.com/LT1122  
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