ALLEGRO A1365LKTTN-1-T

The A1365 linear output Hall-effect sensor IC is designed to deliver high-bandwidth, high-resolution, high-accuracy output in current sensing applications. The device employs piecewise linear interpolation temperature compensation to provide greater precision in sensitivity and offset voltage adjustment, achieving near-zero temperature drift — a significant improvement that substantially reduces total error over the operating temperature range. The user-activated self-test diagnostic mode verifies the A1365's sensitivity and over-field fault functionality, enabling a high level of functional safety in the application. The highly programmable over-field fault signal (FAULT pin) can be used to detect high magnetic field conditions, and also includes broken ground line detection, undervoltage lockout when VCC falls below specification, and user-selectable output voltage clamping — all critical for high reliability in automotive applications. The sensor's accuracy and diagnostic capability make it well suited for automotive applications such as hybrid vehicle inverters and DC-DC converters. The A1365 Hall-effect sensor IC is extremely sensitive, fast, and thermally stable; user programming via the VCC supply and output pins enhances device accuracy and flexibility for optimized in-application performance. This ratiometric Hall-effect sensor IC provides a voltage output proportional to the applied magnetic field, with a quiescent output voltage user-adjustable around 50% of VCC (bidirectional), and device sensitivity adjustable over a range of 0.6 to 14 mV/G. The A1365 integrates a high-sensitivity Hall element with a BiCMOS interface IC, incorporating temperature compensation circuitry to reduce inherent sensitivity and offset drift of the Hall element, along with a small-signal high-gain amplifier, a clamped low-impedance output stage, and a proprietary high-bandwidth dynamic offset cancellation technique. Device specifications cover an extended ambient temperature range of -40°C to 150°C. The A1365 sensor IC is available in an ultra-thin (1 mm thick) 4-pin SIP (single in-line package, suffix KT), lead-free with 100% matte tin-plated leadframe; the thin package enables improved magnetic coupling.

• Proprietary piecewise linear temperature compensation (TC) technology provides typical 1% accuracy over the full operating temperature range
• Self-test diagnostic mode for achieving high levels of functional safety in-system
• 120kHz nominal bandwidth via proprietary packaging and chopper stabilization techniques
• Over-field fault signal with 6-bit programmable trip level, 2-bit programmable hysteresis, and latched or unlatched behavior
• Over-field fault response time < 4.5μs (typical)
• Ultra-low noise and high resolution via proprietary Hall element and low-noise amplifier circuitry
• User-programmable high-resolution offset and sensitivity adjustment
• 1mm thick SIP through-hole package
• Factory-programmed sensitivity and quiescent output voltage temperature compensation for extremely stable thermal performance
• Sensitivity range of 0.6 to 14mV/G selectable via coarse sensitivity programming bits
• Ratiometric sensitivity, quiescent voltage output, and clamp for simple interface with application ADC
• Output voltage clamp provides short-circuit diagnostic capability
• Ground pin open-circuit detection (broken wire)
• Undervoltage lockout when VCC falls below specification
• Wide ambient temperature range: -40°C to 150°C

Automotive inverters, DC-DC converters