ALLEGRO ACS37012LLZATR-030B3

The ACS37010 and ACS37012 are fully integrated current sensor ICs designed to detect current flowing through a compact SOIC LZ package. The current conductor features an extremely low resistance of only 0.68mΩ, making it well-suited for low-power-constrained applications. The sensors are factory-trimmed to deliver high accuracy across the full operating range, requiring no customer programming.

The internal architecture provides high isolation and achieves excellent magnetic coupling between the magnetic field generated by current flowing through the conductor and the fully monolithic integrated Hall sensor IC. Current is differentially sensed by two Hall elements, which cancels interfering common-mode magnetic fields. The sensor offers an analog output with a very fast 1.3μs response time and a VREF pin for noisy power supply environments (ACS37010), or a fast logic alert fault output pin with a factory pre-programmed trip point for overcurrent or short-circuit detection to enhance system protection (ACS37012). The IC has no physical connection to the integrated current conductor and provides 3500Vrms isolation between the primary-side and secondary-side signal pins of the package.

The ACS37010/12 comes in a custom 6-pin SOIC package (suffix LZ). The devices are RoHS-compliant and lead-free, with no RoHS exemptions used, featuring a 100% matte tin-plated leadframe.

The device outputs an analog signal VOUT that varies linearly with AC or DC primary-side current IP over the specified range.

• High operating bandwidth and fast response time: 450 kHz bandwidth, 1.3 μs response time
• High-accuracy current measurement: ±1.5% sensitivity error over full temperature range, ±4mV offset voltage over full temperature range
• Non-ratiometric operation with VREF output for improved accuracy in noisy environments
• Differential sensing for immunity to external magnetic field interference
• Hysteresis-free operation
• Wide operating temperature range: -40℃ to 150℃
• Low internal primary-side conductor resistance (0.68mΩ) for improved energy efficiency (low power loss)
• Highly isolated compact SMT package: 3500Vrms withstand voltage, 905 Vrms / 1280 Vdc basic isolation voltage, 507 Vrms / 717 Vdc reinforced isolation voltage
• AEC-Q100 Grade 0 compliant for automotive applications