ADAF1080
Integrated 8 mT AMR Magnetic Field Sensor and Signal Conditioner
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Overview
Features and Benefits
- Single-axis, high-precision, AMR magnetic field sensor
- Maximum magnetic field strength on the sense field axis for linear operation up to ±8 mT
- Output noise (noise density magnetic field equivalent): 6 nT/√Hz
- >100 dB dynamic range
- Flip coil to calibrate electrical offset over life and temperature
- Temperature compensated output
- Integrated precision instrumentation amplifier
- Up to 2.2 MHz bandwidth at gain = 20
- Programmable chopping for precision measurements
- Synchronization features for wide bandwidth applications
- Ratiometric output capability to improve PSRR
- Programmable gain for 1.8 V to 5 V ADC range
- Analog output optimized to drive ADC
- Ease of use features
- Wide and user-selectable output common-mode voltage
- Integrated electrical offset cancellation
- Integrated diagnostics
- Temperature range: –40°C to +125°C
- Supply voltage range: 4.5 V to 5.5 V
- Available in a 20-Lead LFCSP with an exposed pad
Product Details
The ADAF1080 is a single-axis, high-precision, magnetic-field sensor with integrated signal conditioning. The device incorporates an anisotropic magnetoresistive (AMR) sensor with an integrated signal- conditioning amplifier, electrical-offset cancellation capabilities, integrated diagnostics, and an analog-to-digital converter (ADC) driver for precise measurement of magnetic fields up to ±8 mT.
The ADAF1080 consists of two die within one package, an AMR sensor, and an application-specific IC (ASIC). The ADAF1080 provides a precision amplified output signal that is proportional to the magnetic field strength along the sensitive axis of the sensor. The output voltage is ratiometric to the supply voltage with a common mode of half the voltage set on the external VSET input pin.
The magnetic orientation of the sensor can be defined through the use of an integrated flip coil that can be used for electrical-offset cancellation in the presence of a constant magnetic field. Diagnostics can be carried out through the use of an integrated diagnostic coil, which can measure the gain of the system or detect a magnetic saturation event.
The ADAF1080 is available in a 20-lead LFCSP with an exposed pad.
APPLICATIONS
- Isolated and contactless current sensing
- Handheld current clamp meters
- Motor control current sense
- AC and DC power applications
- Precision magnetic field sensing applications
- Precision linear encoders
- Low-noise, precision magnetometers
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Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.