LT1122

PRODUCTION

Fast Settling, JFET Input Operational Amplifier

Data Sheet Product Selection Table

Part Models: 8
1ku List Price: Starting From $3.27

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Overview

100% Tested Settling Time to 1mV at Sum Node, 10V Step
- 340ns Typ
- 540ns Max
Tested with Fixed Feedback Capacitor
Slew Rate 60V/μs Min
Gain-Bandwidth Product 14MHz
Power Bandwidth (20V_P-P) 1.2 MHz
Unity-Gain Stable; Phase Margin 60°
Input Offset Voltage 600μV 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

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/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.

The LT1122 offset voltage of 120μV, 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.

Applications

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

Part Models: 8
1ku List Price: Starting From $3.27

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT1122ACN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1122BCN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1122CCN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1122CS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1122CS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1122DCN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1122DS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1122DS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package
		PCN24_0234_Form Material_Report Marking Comparison
LT1122ACN8#PBF	PRODUCTION
LT1122BCN8#PBF	PRODUCTION
LT1122CCN8#PBF	PRODUCTION
LT1122DCN8#PBF	PRODUCTION
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package
		PCN22_0241_Form Material_Report Qualification Results Summary
LT1122ACN8#PBF	PRODUCTION
LT1122BCN8#PBF	PRODUCTION
LT1122CCN8#PBF	PRODUCTION
LT1122DCN8#PBF	PRODUCTION
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]
		PCN22_0172_Form Material_Report Delta Qualification Matrix
LT1122ACN8#PBF	PRODUCTION
LT1122BCN8#PBF	PRODUCTION
LT1122CCN8#PBF	PRODUCTION
LT1122DCN8#PBF	PRODUCTION
Oct 8, 2024 - 24_0236 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0236_Form Material_Report Marking Comparison Delta Qualification Matrix
LT1122CS8#PBF	PRODUCTION
LT1122CS8#TRPBF	PRODUCTION
LT1122DS8#PBF	PRODUCTION
LT1122DS8#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0254 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)
		PCN22_0254_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1122CS8#PBF	PRODUCTION
LT1122CS8#TRPBF	PRODUCTION
LT1122DS8#PBF	PRODUCTION
LT1122DS8#TRPBF	PRODUCTION
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0060_Form Material_Report Delta Qualification Matrix
LT1122CS8#PBF	PRODUCTION
LT1122CS8#TRPBF	PRODUCTION
LT1122DS8#PBF	PRODUCTION
LT1122DS8#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LT1122

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.