ADAF1080 datasheet(32/36 Pages) AD

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Data Sheet

ADAF1080

APPLICATIONS INFORMATION

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Rev. 0 | 32 of 36

DESIGN EXAMPLES

Single-Axis Magnetic Field Sensor

A design example for a single-axis magnetometer capable of

measuring a wide range of ±8 mT magnetic fields using a single

ADAF1080 is shown in Figure 58 where the ADAF1080 with G =

80 and a 20 kHz output filter is connected to an AD4002 ADC

with a 5 V reference voltage. A microcontroller connected to such

a configuration can be used as a single-axis magnetometer meas-

uring a wide range of ±8 mT or for accurate contactless current

measurement.

Figure 58. Design Example with 5 V ADC and 20 kHz Filter

Table 18. Component Values for the Design Example with 5 V ADC and 20 kHz Filter

Component

Description

Suggested Part Number

ADAF1080

Integrated ±8 mT AMR magnetic field sensor and signal conditioner

ADAF1080BCPZ

AD4002

18-bit, 2 MSPS, precision, pseudo differential, SAR ADC

AD4002BRMZ

1 µF ceramic capacitor, 16 V, 0603

CGA3E1X7R1C105K080AC

C2 and CFLIP

10 µF ceramic capacitors, 25 V, 0805

GRM21BR61E106KA73L

0.1 µF ceramic capacitor

CL10B104KB8NNWC

COUT

10 nF ceramic capacitor

06035C103JAT2A

ROUT

820 Ω resistor, 1/10 W, 1%, 0603, surface-mount device (SMD)

RC0603FR-10820RL

RFLIP

10 Ω resistor, 1/10 W, 1%, 0603, SMD

WR06X10R0FTL

CFLIP

10 µF ceramic capacitors, 25 V, 0805

GRM21BR61E106KA73L

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