ACS72981LLR

Part: ACS72981 family — Allegro Type: High-Precision Linear Hall-Effect-Based Current Sensor IC

Description: The Allegro ACS72981 family provides economical and precise solutions for AC or DC current sensing with a 250 kHz bandwidth, less than 2 μs output response time, and ultralow 200 μΩ internal conductor resistance, supporting up to ±200 A primary sampled current.

Operating Conditions:

• Supply voltage: 3–3.6 V or 4.5–5.5 V
• Operating temperature: -40 to 150 °C
• Internal Bandwidth: 250 kHz
• Output response time: 1.8 μs (Typ.)

Absolute Maximum Ratings:

• Max supply voltage: 6.5 V
• Max continuous current: 120 A (T A = 25°C)
• Max junction temperature: 165 °C
• Max storage temperature: -65 to 165 °C

Key Specs:

• Supply Current (I CC): 14 mA (Typ.)
• Internal Bandwidth (BW i): 250 kHz (Typ.)
• Response Time (t RESPONSE): 1.8 μs (Typ., T A = 25°C, C L = 1 nF, 1 V step on output)
• Primary Conductor Resistance (R PRIMARY): 200 μΩ (Typ., T A = 25°C)
• Sensitivity (Sens): 26.4 mV/A (Typ., for ±50A, 3.3V variant)
• Total Output Error (E TOT): ±2.25 % (Typ., I P = 37.5 A, T OP = 25°C to 150°C)
• Noise (V N): 7 mV RMS (Typ., T A = 25°C, C L = 1 nF, BW = 250 kHz, for ±50A, 3.3V variant)
• DC Output Impedance (R OUT): < 1 Ω (Typ.)

Features:

• AEC-Q100 automotive qualification
• High-bandwidth 250 kHz analog output
• Less than 2 μs output response time
• 3.3 V and 5 V supply operation
• Ultralow power loss: 200 μΩ internal conductor resistance
• Industry-leading noise performance and increased bandwidth through proprietary amplifier and filter design techniques
• Greatly improved total output error through digitally programmed and compensated gain and offset over the full operating temperature range
• Small package size, with easy mounting capability
• Monolithic Hall IC for high reliability
• Output voltage proportional to AC or DC currents
• Factory-trimmed for accuracy
• Extremely stable zero amp output offset voltage over temperature and lifetime

Applications:

• Motor control
• Load detection and management
• Power supply and DC-to-DC converter control
• Inverter control
• Overcurrent fault detection in safety-critical applications

Package:

• 7-pin PSOF package (suffix LR)

• AEC-Q100 automotive qualification
• High-bandwidth 250 kHz analog output
• Less than 2 μs output response time
• 3.3 V and 5 V supply operation
• Ultralow power loss: 200 μΩ internal conductor resistance
• Industry-leading noise performance and increased bandwidth through proprietary amplifier and filter design techniques
• Greatly improved total output error through digitally programmed and compensated gain and offset over the full operating temperature range
• Small package size, with easy mounting capability
• Monolithic Hall IC for high reliability
• Output voltage proportional to AC or DC currents
• Factory-trimmed for accuracy
• Extremely stable zero amp output offset voltage over temperature and lifetime

The ACS72981xLR outputs an analog signal, V OUT , that varies linearly with the bidirectional AC or DC primary sampled current, I P , within the range specified.