Vehicle grade current detection amplifier - LTA180Q

The LTA180Q series of current sense amplifiers (also called current shunt monitors) are designed for cost-optimized applications, that sense voltage drops across current-sense resistors at common-mode voltages from –0.2 V to +30 V, independent of the supply voltage. The LTA180Q series integrate a matched resistor gain network in four fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift.

The LTA180Q series operate from a single +2.7-V to +5.5-V power supply, drawing a maximum of 110μA of supply current. The device is specified from -40℃ to +125℃, and offered in SOT23-5L packages.

Features and Benefits

• Wide common-mode range: –0.2 V to 30 V
• Offset voltage

  – ±150 μV Maximum at VCM = 0 V

  – ±500 μV Maximum at VCM = 12 V

• Accuracy

  – Maximum ±1% Gain Error

  – Maximum 1 μV/℃ Offset Drift

• Gains Options:

  – 20V/V (LTA180A1Q Qualified, LTA180B1Q Compatible)

  – 50V/V (LTA180A2Q Compatible, LTA180B2Q Compatible)

  – 100V/V (LTA180A3Q Compatible, LTA180B3Q Compatible)

  – 200V/V (LTA180A4Q Compatible, LTA180B4Q Compatible)

• Output slew rate: 1.3 V/μs
• Quiescent Current: Maximum 230μA
• Package: SOT23-5L
• Automotive Grade 1

Applications

• Motor Control
• Battery Monitor, BMS
• Power Management
• Lighting Control
• Over-Current Detection
• Solar Inverters