Texas Instruments INA149
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 thinfilm resistor network. The INA149 can accurately measure small differential voltages in the presence of common-mode signals up to ±275 V.| Part No. | INA149 |
|---|---|
| Datasheet | INA149 Download |
| Manufacturer |  Texas Instruments |
| Description | Voltage Difference Amplifier |
| Buy | Stock & Price |
FEATURES
1●2 Common-Mode Voltage Range: ±275 V
● Minimum CMRR: 90 dB from –40°C to +125°C
● DC Specifications: – Maximum Offset Voltage: 1100 μV – Maximum Offset Voltage Drift: 15 μV/°C – Maximum Gain Error: 0.02% – Maximum Gain Error Drift: 10 ppm/°C – Maximum Gain Nonlinearity: 0.001% FSR
● AC Performance: – Bandwidth: 500 kHz – Typical Slew Rate: 5 V/μs
● Wide Supply Range: ±2.0 V to ±18 V – Maximum Quiescent Current: 900 μA – Output Swing on ±15-V Supplies: ±13.5 V
● Input Protection: – Common-Mode: ±500 V – Differential: ±500 V
APPLICATIONS
● High-Voltage Current Sensing● Battery Cell Voltage Monitoring
● Power-Supply Current Monitoring
● Motor Controls
● Replacement for Isolation Circuits
DESCRIPTION
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.
