SCA61T Series
T1 [ms]
20-100
T2 [ms]
Typ. 25
T3 [ms]
Typ. 30
T4 [ms]
Typ. 55
T5 [ms]
Typ. 15
V2:
V3:
0.95*V1-1.05*V1
Min 0.95*VDD
(4.75V @Vdd=5V)
2.7 Temperature Measurement
The SCA61T has an internal temperature sensor, which is used for internal offset compensation.
The temperature information is also available for additional external compensation. The
temperature sensor can be accessed via the SPI interface and the temperature reading is an 8-bit
word (0…255). The transfer function is expressed with the following formula:
Counts −197
T =
−1.083
Where:
Counts Temperature reading
T
Temperature in °C
The temperature measurement output is not calibrated. The internal temperature compensation
routine uses relative results where absolute accuracy is not needed. If the temperature
measurement results are used for additional external compensation then one point calibration in
the system level is needed to remove the offset. With external one point calibration the accuracy of
the temperature measurement is about ±1 °C.
VTI Technologies Oy
www.vti.fi
Subject to changes
Doc. nr. 8261900
14/18
Rev.A
VTI [ VTI TECHNOLOGIES ]
