Electronics Weekly
Automotive applications are envisaged, include infotainment rotary and push selectors, gear shifts, door handles and powered seat adjusters, it said.
AH4930Q, as it will be known, comes in a ~3 x 3 x 1.5mm SOT-26 package and includes three sensors to detect a magnetic field in X, Y and Z directions.
AH4930 is a related part for industrial and commercial applications.
Inside, a 12bit ADC converts X, Y and Z readings into digital data.
“The implemented I2C interface enables communication for measurement data reading and runtime programming with host systems as fast as 1Mbit/s to support real-time adjustments,” said Diodes.
Measurements can be made up to ±1,300G in all directions – the nominal Z axis is through the IC and the other two are in the plane of the IC.
Resolution is 1G (0.1mT) per bit (with ±20% sensitivity drift and ±20% matching drift between Z and the other two axes).
Offsets are typically ±2G (±10G max in Z and ±15G in X and Y). Typical noise is 1Grms.
There are three operating modes to trade power against acquisition rate: 13µA for 10Hz, 95µA for 83.3Hz and 3.8mA for 3.3kHz, plus a 9nA power-down mode. [Ed: impressive power-down value].
“With a 10µs wake-up time, 4µs response time and wide bandwidth, AH4930Q delivers fast data acquisition even for the most demanding applications,” claimed the company.
Operation is over 2.8 to 5.5V and -40 to +125°C.
Internally, a temperature sensor is included for compensation, and this temperature reading is also available though the digital interface with a resolution of 1°C/bit.
The automotive Q version is qualified to AEC-Q100 Grade 1, manufactured in facilities certified to IATF 16949 and is supported by PPAP documents.
Find the Diodes AH4930Q product page here
