Analog Devices Inc. ADSC571WCSWZ400

Overview

ADSC571WCSWZ400 from Analog Devices is a high-precision anisotropic magnetoresistive (AMR) angle sensor with integrated signal conditioning amplifiers and ADC drivers, delivering ratiometric sine and cosine analog outputs for magnetic field direction measurement. It achieves ±0.5° maximum angular error over −40°C to +150°C, supports 2.7 V to 5.5 V supply, features built-in fault diagnostics and EMI filtering, and is used in automotive brushless DC motor position feedback loops.

For engineers reviewing the ADSC571WCSWZ400 datasheet, ADSC571WCSWZ400 pinout, ADSC571WCSWZ400 application, or ADSC571WCSWZ400 equivalent, key selection considerations include uncorrected angular error at temperature extremes, amplitude synchronism matching (±0.75% peak), phase delay under 2 µs at 30,000 rpm, ratiometric output drive capability for SAR/Σ-Δ ADCs, and SOIC-8 package compatibility with automotive PCB layouts.

Technical Context

The ADSC571WCSWZ400 integrates two die in one SOIC-8 package: an AMR bridge sensor array with 45° relative orientation and a fixed-gain (G = 40) instrumentation amplifier with chopping-stabilized zero-drift architecture. Its dual Wheatstone bridges generate double-frequency sinusoidal outputs proportional to magnetic field angle α in the x-y plane, independent of z-axis air gap under homogeneous fields.

On-chip diagnostics monitor bond wire integrity, power-down state, and temperature via the buffered VTEMP pin (ratiometric, 0–82% VDD). The GC pin selects gain control mode (GND or VDD), while PD enables low-power standby (15 µA quiescent current), and EMI filters suppress noise before ADC driver stages.

Key Specifications

Pinout & Package

ADSC571WCSWZ400 is housed in an 8-lead SOIC package (θJA = 120°C/W), optimized for surface-mount assembly and thermal management in engine bay and transmission control modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar AMR angle sensor applications.

Compared with TAS2587DQNR and MLX90393ELD-ABA-000-TU, ADSC571WCSWZ400 uniquely delivers ratiometric analog sine/cosine outputs with on-chip diagnostics, 180° precision, and SOIC-8 automotive qualification-making it optimal for cost-sensitive, high-reliability motor control where analog ADC interfacing and fault visibility are mandatory.

Availability

ADSC571WCSWZ400 is available at Aetrix Electronics and suitable for automotive powertrain control, electric power steering systems, and transmission actuator positioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADSC571WCSWZ400 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADSC571WCSWZ400 belongs to Analog Devices' automotive-qualified AMR sensor family, engineered specifically for contactless angular position sensing in harsh environments where precision, reliability, and functional safety are critical.

FAQ

What is the maximum operating temperature for ADSC571WCSWZ400?

The ADSC571WCSWZ400 is rated for continuous operation from −40°C to +150°C, qualified per AEC-Q100 Grade 0 standards. Its AMR bridge and chopper-stabilized amplifier maintain ±0.7° single-point calibrated angular error across this full range, making it suitable for under-hood applications such as engine valve timing and turbocharger vane position sensing. Thermal drift of the VTEMP output is compensated internally to ±5°C accuracy.

Does ADSC571WCSWZ400 require external calibration for automotive use?

ADSC571WCSWZ400 supports production-ready calibration with only a single offset nulling step at 25°C, achieving ±0.7° total angular error over −40°C to +150°C. No end-of-line gain or orthogonality trim is needed due to factory-matched amplifier channels and on-die temperature compensation. This eliminates post-assembly calibration steps in high-volume automotive manufacturing, reducing test time and cost while maintaining ASIL-B compliance.

How does the GC pin affect ADSC571WCSWZ400 performance?

The GC pin on ADSC571WCSWZ400 selects between two internal gain modes: GC = GND sets nominal amplifier gain of 40×, while GC = VDD adjusts gain to optimize amplitude temperature coefficient. In GC = VDD mode, output amplitude variation over temperature is reduced-critical for maintaining ADC dynamic range in wide-temperature applications like transmission control modules. Both modes retain full 180° angle range and diagnostic functionality.

Can ADSC571WCSWZ400 drive an ADC directly without external op-amps?

Yes, ADSC571WCSWZ400 is designed to drive SAR and Σ-Δ ADC inputs directly. Its VSIN and VCOS outputs feature 60 Ω series resistance, 100 kHz −3 dB bandwidth, and 500 µVrms noise (80 kHz BW), meeting input requirements of AD7265/AD7266 without buffering. Ratiometric scaling (7–93% VDD) ensures full ADC utilization even with supply voltage variation, and the common-mode level at VDD/2 matches standard pseudo-differential ADC references.

What fault conditions does ADSC571WCSWZ400 detect internally?

ADSC571WCSWZ400 provides three integrated fault diagnostics: (1) broken bond wire detection via VOL = 5% VDD output state on VSIN/VCOS, (2) power-down status monitoring through PD pin logic level, and (3) thermal anomaly flagging using the VTEMP output voltage deviation beyond its 0–82% VDD range. These features eliminate the need for external comparators or microcontroller polling, enabling autonomous fail-safe behavior in ASIL-B systems.