INA149-EP Enhanced Product High Common Mode Voltage Difference Amplifier | TI.com

INA149-EP (ACTIVE)

Enhanced Product High Common Mode Voltage Difference Amplifier

Enhanced Product High Common Mode Voltage Difference Amplifier  - INA149-EP
 

Description

The INA149 is a precision unity-gain difference amplifier with a very high input common-mode voltage range. It is a single, monolithic device that consists of a precision op amp and an integrated thin-film resistor network. The INA149 can accurately measure small differential voltages in the presence of common-mode signals up to ±275 V. The INA149 inputs are protected from momentary common-mode or differential overloads of up to
500 V.

In many applications, where galvanic isolation in not required, the INA149 can replace isolation amplifiers. This ability can eliminate costly isolated input side power supplies and the associated ripple, noise, and quiescent current. The excellent 0.0005% nonlinearity and 500-kHz bandwidth of the INA149 are superior to those of conventional isolation amplifiers.

The INA149 is pin-compatible with the INA117 and INA148 type high common-mode voltage amplifiers and offers improved performance over both devices. The INA149 is available in the SOIC-8 package with operation specified over the military temperature range of –55°C to +125°C.

Features

  • Common-Mode Voltage Range: ±275 V
  • Minimum CMRR: 84 dB from –55°C to +125°C
  • DC Specifications:
    • Maximum Offset Voltage: 3500 µV
    • Maximum Gain Error: 0.047%
    • Maximum Gain Nonlinearity: 0.001% FSR at 25°C
  • AC Performance:
    • Bandwidth: 500 kHz
    • Typical Slew Rate: 5 V/µs
  • Wide Supply Range: ±2.0 V to ±18 V
    • Maximum Quiescent Current: 1100 µA
    • Output Swing on ±15-V Supplies: ±13.5 V
  • Input Protection:
    • Common-Mode: ±500 V
    • Differential: ±500 V

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Parametrics Compare all products in Difference amplifiers

 
Number of Channels (#)
Vs (Min) (V)
Vs (Max) (V)
CMRR (Min) (dB)
Common Mode Input Low (Min) (V)
Common Mode Input High (Max) (V)
Input Offset (+/-) (Max) (uV)
Iq (Typ) (mA)
Small Signal Bandwidth (Typ) (MHz)
Slew Rate (Typ) (V/us)
Gain (Min) (V/V)
Gain (Max) (V/V)
Gain Error (+/-) (Max) (%)
Rating
Operating Temperature Range (C)
Input Offset Drift (+/-) (Max) (uV/C)
Gain Drift (Max) (ppm/C)
INA149-EP
1    
2    
18    
84    
275    
500    
3500    
0.81    
0.5    
5    
1    
1    
0.047    
HiRel Enhanced Product    
-55 to 125    
10    
10    

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