ADA4571

Data Sheet Integrated AMR Angle Sensor and Signal Conditioner ADA4571 FEATURES High precision 180° angle sensor Maximum angular error of 0.5° Analog sine and cosine outputs Ratiometric output voltages Low thermal and lifetime drift SAR or Σ-∆ analog-to-digital converter (ADC) drive capable Magnetoresistive (MR) bridge temperature compensation mode Temperature range: −40°C to +150°C EMI resistant Fault diagnostics VDD from 2.7 V to 5.5 V Minimum phase delay Qualified for automotive applications Available in an 8-lead SOIC package APPLICATIONS Absolute position measurement (linear and angle) Brushless dc motor control and positioning Actuator control and positioning Contactless angular measurement and detection Magnetic angular position sensing FUNCTIONAL BLOCK DIAGRAM VDD ADA4571 TEMPERATURE SENSOR BRIDGE DRIVER VTEMP GC EMI FILTER + G = 40 – DRIVER VSIN AMR BRIDGE SENSORS BIAS OSCILLATOR FAULT DETECTION EMI FILTER + G = 40 – DRIVER VCOS GND GND Figure 1. PD 12514-001 GENERAL DESCRIPTION The ADA4571 is an anisotropic magnetoresistive (AMR) sensor with integrated signal conditioning amplifiers and ADC drivers. The ADA4571 produces two analog outputs that indicate the angular position of the surrounding magnetic field. The ADA4571 consists of two die within one package, an AMR sensor, and a fixed gain (G = 40 nominally) instrumentation amplifier. The ADA4571 delivers clean and amplified cosine and sine output signals related to the angle of a rotating magne...