LT1793

PRODUCTION

Low Noise, Picoampere Bias Current, JFET Input Op Amp

Part Models: 12
1ku List Price: Starting From $2.77

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Overview

Input Bias Current, Warmed Up: 10pA Max
100% Tested Low Voltage Noise: 8nV/√Hz Max
A Grade 100% Temperature Tested
Offset Voltage Over Temp: 1mV Max
Input Resistance: 10¹³Ω
Very Low Input Capacitance: 1.5pF
Voltage Gain: 1 Million Min
Gain-Bandwidth Product: 4.2MHz Typ
Guaranteed Specifications with ±5V Supplies

The LT1793 achieves a new standard of excellence in noise performance for a JFET op amp. For the first time low voltage noise (6nV/√Hz) is simultaneously offered with extremely low current noise (0.8fA/√Hz), providing the lowest total noise for high impedance transducer applications. Unlike most JFET op amps, the very low input bias current (3pA typ) is maintained over the entire common mode range which results in an extremely high input resistance (10¹³Ω). When combined with a very low input capacitance (1.5pF) an extremely high input impedance results, making the LT1793 the first choice for amplifying low level signals from high impedance transducers. The low input capacitance also assures high gain linearity when buffering AC signals from high impedance transducers.

The LT1793 is unconditionally stable for gains of 1 or more, even with 1000pF capacitive loads. Other key features are 250µV V_OS and a voltage gain over 4 million. Each individual amplifier is 100% tested for voltage noise, slew rate (3.4V/µs) and gain-bandwidth product (4.2MHz).

Specifications at ±5V supply operation are also provided. For an even lower voltage noise please see the LT1792 data sheet.

Applications

Photocurrent Amplifiers
Hydrophone Amplifiers
High Sensitivity Piezoelectric Accelerometers
Low Voltage and Current Noise Instrumentation Amplifier Front Ends
Two and Three Op Amp Instrumentation Amplifiers
Active Filters

Part Models: 12
1ku List Price: Starting From $2.77

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
LT1793ACN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1793ACS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1793ACS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1793AIN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1793AIS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1793AIS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1793CN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1793CS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1793CS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1793IN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1793IS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1793IS8#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
LT1793ACN8#PBF	PRODUCTION
LT1793AIN8#PBF	PRODUCTION
LT1793CN8#PBF	PRODUCTION
LT1793IN8#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
LT1793ACN8#PBF	PRODUCTION
LT1793AIN8#PBF	PRODUCTION
LT1793CN8#PBF	PRODUCTION
LT1793IN8#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
LT1793ACN8#PBF	PRODUCTION
LT1793AIN8#PBF	PRODUCTION
LT1793CN8#PBF	PRODUCTION
LT1793IN8#PBF	PRODUCTION
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0246_Form Material_Report Marking Comparison Delta Qualification Matrix
LT1793ACS8#PBF	PRODUCTION
LT1793ACS8#TRPBF	PRODUCTION
LT1793AIS8#PBF	PRODUCTION
LT1793AIS8#TRPBF	PRODUCTION
LT1793CS8#PBF	PRODUCTION
LT1793CS8#TRPBF	PRODUCTION
LT1793IS8#PBF	PRODUCTION
LT1793IS8#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)
		PCN22_0255_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1793ACS8#PBF	PRODUCTION
LT1793ACS8#TRPBF	PRODUCTION
LT1793AIS8#PBF	PRODUCTION
LT1793AIS8#TRPBF	PRODUCTION
LT1793CS8#PBF	PRODUCTION
LT1793CS8#TRPBF	PRODUCTION
LT1793IS8#PBF	PRODUCTION
LT1793IS8#TRPBF	PRODUCTION
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0026_Form Material_Report Delta Qualification Matrix
LT1793ACS8#PBF	PRODUCTION
LT1793ACS8#TRPBF	PRODUCTION
LT1793AIS8#PBF	PRODUCTION
LT1793AIS8#TRPBF	PRODUCTION
LT1793CS8#PBF	PRODUCTION
LT1793CS8#TRPBF	PRODUCTION
LT1793IS8#PBF	PRODUCTION
LT1793IS8#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:

LT1793

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