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LT1990 Datasheet

LT1990 Datasheet

±250V Input Range G = 1, 10, Micropower, Difference Amplifier
Part No.: LT1990
Page: 16 Pages
Size: 211 KB
Manufacturer: Linear Technology
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Views: 5
Update Time: 2023-09-18 15:20:47
DataSheet: Download

LT1990 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LT1990CS8#PBF Tube 100 1990 1 8 0°C ~ 70°C 8-Lead SOIC  
LT1990CS8#TRPBF Reel 2500 1990 1 8 0°C ~ 70°C 8-Lead SOIC  
LT1990CS8#TRMPBF Reel 500 1990 1 8 0°C ~ 70°C 8-Lead SOIC  
LT1990IS8#PBF Tube 100 1990I 1 8 -40°C ~ 85°C 8-Lead SOIC  
LT1990IS8#TRPBF Reel 2500 1990I 1 8 -40°C ~ 85°C 8-Lead SOIC  
LT1990IS8#TRMPBF Reel 500 1990I 1 8 -40°C ~ 85°C 8-Lead SOIC  
LT1990HS8#PBF Tube 100 1990H 1 8 -40°C ~ 125°C 8-Lead SOIC  
LT1990HS8#TRPBF Reel 2500 1990H 1 8 -40°C ~ 125°C 8-Lead SOIC  
LT1990HS8#TRMPBF Reel 500 1990H 1 8 -40°C ~ 125°C 8-Lead SOIC  
LT1990ACS8#PBF Tube 100 1990A 1 8 0°C ~ 70°C 8-Lead SOIC  
LT1990ACS8#TRPBF Reel 2500 1990A 1 8 0°C ~ 70°C 8-Lead SOIC  
LT1990ACS8#TRMPBF Reel 500 1990A 1 8 0°C ~ 70°C 8-Lead SOIC  
LT1990AIS8#PBF Tube 100 1990AI 1 8 -40°C ~ 85°C 8-Lead SOIC  
LT1990AIS8#TRPBF Reel 2500 1990AI 1 8 -40°C ~ 85°C 8-Lead SOIC  
LT1990AIS8#TRMPBF Reel 500 1990AI 1 8 -40°C ~ 85°C 8-Lead SOIC  
LT1990AHS8#PBF Tube 100 1990AH 1 8 -40°C ~ 125°C 8-Lead SOIC  
LT1990AHS8#TRPBF Reel 2500 1990AH 1 8 -40°C ~ 125°C 8-Lead SOIC  
LT1990AHS8#TRMPBF Reel 500 1990AH 1 8 -40°C ~ 125°C 8-Lead SOIC  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LT1990 Datasheet(PDF)

LT1990 Datasheet(Picture)

LT1990 Features

  • Pin Selectable Gain of 1 or 10
  • High Common Mode Voltage Range:
    • 85V Window (VS = 5V, 0V)
    • ±250V (VS = ±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

LT1990 Applications

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

LT1990 Description

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.

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