Allegro MicroSystems A1315LUATN-5-T

Overview

A1315LUATN-5-T from Allegro MicroSystems is a linear Hall-effect sensor IC with analog output, designed for high-accuracy angular and displacement sensing in automotive and industrial systems. It delivers 5 mV/G sensitivity, ratiometric 3.3 V operation, –40°C to 150°C operating range, and factory-programmed temperature coefficients for QVO and sensitivity - enabling stable performance in engine control, throttle position, and brake pedal sensing.

For engineers reviewing the A1315LUATN-5-T datasheet, A1315LUATN-5-T pinout, A1315LUATN-5-T application, or A1315LUATN-5-T equivalent, key selection criteria include its 3-pin ultramini SIP through-hole package, ±1.5% linearity error, 20 kHz bandwidth, clamped output for short-circuit diagnostics, and end-of-line optimization for thermal stability across harsh environments.

Technical Context

The A1315LUATN-5-T integrates a BiCMOS monolithic circuit featuring a Hall element, dynamic offset cancellation via high-frequency chopping at 400 kHz, temperature-compensating circuitry, and a clamped low-impedance output stage. Its architecture eliminates thermal and mechanical stress-induced drift by modulating offset into high-frequency bands while preserving magnetic signal integrity in baseband.

End-of-line programming sets both sensitivity temperature coefficient (0.08–0.16 %/°C) and QVO temperature coefficient across the full –40°C to 150°C range. The device uses a tuned filter and anti-aliasing low-pass filtering to support 20 kHz small-signal bandwidth while suppressing chopper residue and thermal noise.

Key Specifications

Pinout & Package

Package: 3-pin ultramini SIP (UA), through-hole mount, 1.5 mm × 4 mm × 3 mm, lead-free with 100% matte-tin plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear Hall-effect sensor applications.

Compared with MLX90242ESE-AAA-075-SP and A1324LLHLT-2-T, the A1315LUATN-5-T uniquely combines factory-optimized 5 mV/G sensitivity, analog clamping, and end-of-line TC programming in a through-hole SIP package - delivering plug-and-play accuracy for high-reliability analog position feedback without firmware overhead or external protection.

Availability

A1315LUATN-5-T is available at Aetrix Electronics and suitable for automotive powertrain sensing, industrial motor control, and hydraulic actuation systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for A1315LUATN-5-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Allegro MicroSystems is a U.S.-based designer and manufacturer of high-performance magnetic sensing and power ICs, specializing in Hall-effect, current sensing, and motor driver solutions for automotive and industrial markets.

The A1315 product line targets high-accuracy, thermally stable linear position sensing - engineered specifically for demanding applications like throttle, brake, and steering angle measurement where drift and repeatability are critical.

FAQ

What is the operating supply voltage range for the A1315LUATN-5-T?

The A1315LUATN-5-T operates from 3.0 V to 3.63 V, with nominal 3.3 V supply. Its ratiometric architecture ensures output voltage, sensitivity, and clamp levels scale proportionally with VCC - maintaining accuracy across this range without recalibration. Undervoltage lockout activates below 2.5 V (turn-off) and above 3.0 V (turn-on), preventing unstable output during power transients.

How does the A1315LUATN-5-T achieve thermal stability across –40°C to 150°C?

The A1315LUATN-5-T achieves thermal stability through end-of-line programming of both sensitivity temperature coefficient (0.08–0.16 %/°C) and quiescent voltage output (QVO) temperature coefficient at Allegro's test facility. This part-specific calibration compensates for intrinsic Hall element drift and package-induced hysteresis, limiting QVO drift to ±15 mV and sensitivity drift to ±2% over temperature - verified per datasheet Table 5.

What is the function of the output clamping feature in the A1315LUATN-5-T?

The A1315LUATN-5-T features active output clamping with VCLPHIGH = 2.97 V and VCLPLOW = 0.33 V (at 25°C, VCC = 3.3 V). These clamps provide inherent short-circuit diagnostic capability: if VOUT is forced beyond these bounds (e.g., by wiring fault), the output saturates predictably - allowing host systems to detect faults without additional protection circuitry or software polling.

Can the A1315LUATN-5-T be used with a 5 V supply?

No - the A1315LUATN-5-T is specified only for 3.0–3.63 V operation. Absolute maximum forward supply voltage is 8 V, but functional operation outside the 3.0–3.63 V range is not characterized or guaranteed. Supplying 5 V risks violating internal regulator and amplifier operating points, potentially causing increased noise, reduced linearity, or premature failure. Use only with regulated 3.3 V sources as defined in the Electrical Characteristics table.

What is the significance of the "TN" suffix in A1315LUATN-5-T?

The "TN" suffix in A1315LUATN-5-T denotes the packing configuration: 4,000 pieces per reel for the 3-pin ultramini SIP (UA) package. This distinguishes it from the "LUA" variant (500 pieces per bag) and "LLHLX" variants (10,000 pieces per reel in SOT-23W). The "5-T" indicates 5 mV/G sensitivity and tape-and-reel packaging - consistent across all A1315 variants with that sensitivity grade.