LT1990

RECOMMENDED FOR NEW DESIGNS

±250V Input Range G = 1, 10, Micropower, Difference Amplifier

Part Models: 12
1ku List Price: Starting From $1.83

Viewing:

Overview

Pin Selectable Gain of 1 or 10
High Common Mode Voltage Range:
- 85V Window (V_S = 5V, 0V)
- ±250V (V_S = ±15V)
Common Mode Rejection Ratio: 70dB Min
Input Protection to ±350V
Gain Error: 0.28% Max
PSRR: 82dB Min
High Input Impedance: 2MΩ Differential, 500kΩ Common Mode
Micropower: 120µA Max Supply Current
Wide Supply Range: 2.7V to 36V
–3dB Bandwidth: 100kHz
Rail-to-Rail Output
8-Pin SO Package

The LT1990 is a micropower precision difference amplifier with a very high common mode input voltage range. It has pin selectable gains of 1 or 10. The LT1990 operates over a ±250V common mode voltage range on a ±15V supply. The inputs are fault protected from common mode voltage transients up to ±350V and differential voltages up to ±500V. The LT1990 is ideally suited for both high side and low side current or voltage monitoring.

On a single 5V supply, the LT1990 has an adjustable 85V input range, 70dB min CMRR and draws less than 120µA supply current. The rail-to-rail output maximizes the dynamic range, especially important for single supplies as low as 2.7V.

The LT1990 is specified for single 3V, 5V and ±15V supplies over both commercial and industrial temperature ranges. The LT1990 is available in the 8-pin SO package.

Applications

Battery Cell Voltage Monitoring
High Voltage Current Sensing
Signal Acquisition in Noisy Environments
Input Protection
Fault Protected Front Ends
Level Sensing
Isolation

Part Models: 12
1ku List Price: Starting From $1.83

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
LT1990ACS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1990ACS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1990AHS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1990AHS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1990AIS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1990AIS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1990CS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1990CS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1990HS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1990HS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1990IS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1990IS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

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
LT1990ACS8#PBF	PRODUCTION
LT1990ACS8#TRPBF	PRODUCTION
LT1990AHS8#PBF	PRODUCTION
LT1990AHS8#TRPBF	PRODUCTION
LT1990AIS8#PBF	PRODUCTION
LT1990AIS8#TRPBF	PRODUCTION
LT1990CS8#PBF	PRODUCTION
LT1990CS8#TRPBF	PRODUCTION
LT1990HS8#PBF	PRODUCTION
LT1990HS8#TRPBF	PRODUCTION
LT1990IS8#PBF	PRODUCTION
LT1990IS8#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
LT1990ACS8#PBF	PRODUCTION
LT1990ACS8#TRPBF	PRODUCTION
LT1990AHS8#PBF	PRODUCTION
LT1990AHS8#TRPBF	PRODUCTION
LT1990AIS8#PBF	PRODUCTION
LT1990AIS8#TRPBF	PRODUCTION
LT1990CS8#PBF	PRODUCTION
LT1990CS8#TRPBF	PRODUCTION
LT1990HS8#PBF	PRODUCTION
LT1990HS8#TRPBF	PRODUCTION
LT1990IS8#PBF	PRODUCTION
LT1990IS8#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
LT1990ACS8#PBF	PRODUCTION
LT1990ACS8#TRPBF	PRODUCTION
LT1990AHS8#PBF	PRODUCTION
LT1990AHS8#TRPBF	PRODUCTION
LT1990AIS8#PBF	PRODUCTION
LT1990AIS8#TRPBF	PRODUCTION
LT1990CS8#PBF	PRODUCTION
LT1990CS8#TRPBF	PRODUCTION
LT1990HS8#PBF	PRODUCTION
LT1990HS8#TRPBF	PRODUCTION
LT1990IS8#PBF	PRODUCTION
LT1990IS8#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:

LT1990

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.