LT1122

Features:

 100% Tested Settling Time                340ns
    Typ to 1mV at Sum Node, 10V Step   540ns Max
    Tested with Fixed Feedback Capacitor
 Slew Rate                                          60V/s Min
 Gain Bandwidth Product                    14MHz
 Power Bandwidth (20Vp-p)                1.2 MHz
 Unity Gain Stable; Phase Margin        60°
 Input Offset Voltage                           600V Max
 Input Bias Current            25°C         75pA Max
                                             70°C         600pA Max
 Input Offset Current         25°C         40pA Max
                                              70°C        150pA Max
 Low Distortion 

Application

 Fast 12-Bit D/A Output Amplifiers
 High Speed Buffers
 Fast Sample and Hold Amplifiers
 High Speed Integrators
 Voltage to Frequency Converters
 Active Filters
 Log Amplifiers
 Peak Detectors


Pinout

Supply Voltage ...................................................... ± 20V
Differential Input Voltage ...................................... ± 40V
Input Voltage ........................................................ ± 20V
Output Short Circuit Duration ................................ Indefinite
Lead Temperature (Soldering, 10 sec.)................. 300°C
Operating Temperature Range
LT1122AM/BM/CM/DM .......................................... 55°C to 125°C
LT1122AC/BC/CC/DC/CS/DS ................................ 40°C to 85°C
Storage Temperature Range
All Devices ............................................................ 65°C to 150°C


Specifications

Supply Voltage ...................................................... ± 20V
Differential Input Voltage ...................................... ± 40V
Input Voltage ........................................................ ± 20V
Output Short Circuit Duration ................................ Indefinite
Lead Temperature (Soldering, 10 sec.)................. 300°C
Operating Temperature Range
LT1122AM/BM/CM/DM .......................................... 55°C to 125°C
LT1122AC/BC/CC/DC/CS/DS ................................ 40°C to 85°C
Storage Temperature Range
All Devices ............................................................ 65°C to 150°C


Description

The LT1122 JFET input operational amplifier combines high speed and precision performance.

A unique poly-gate JFET process minimizes gate series resistance and gate-to-drain capacitance, facilitating wide bandwidth performance, without degrading JFET transistor matching.

It slews at 80V/ms 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.

The LT1122 offset voltage of 120mV, and voltage gain of 500,000 also support the 12-bit accurate 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 amplifiers, peak detectors, and integrators.