User Manual
682
Rev. 1.1
2019-03-18
TLE984xQX
Microcontroller with LIN and Power Switches for Automotive Applications
Measurement Unit
22.3.2
Transfer Characteristics of ADC2
The transfer function of ADC2 can be expressed by the equation below:
(22.1)
where Vin is the input voltage and Gain
CHx
the individual Channel Gain. The LSB Voltage is calculated:
(22.2)
where
Vref
is
V
BG
(P_9.1.10).
A detailed specification of both A/D-converters is given in Chapter
Electrical Characteristics
. The Gain for
each channel can be found in the table included in the following chapter.
22.3.3
Detailed ADC2 Measurement Channel Description
22.3.4
8 Bit - 10 Channel Control Register
The ADC2 control register is located in the
Measurement Core Module
Block.
Table 360 ADC2 Channel Selection and Voltage Ranges
Channel #
Measurement Input Pin
Gain of channel Vin_FS [V]
@V
BG
0
VS 5/128
31.05
1
VDDEXT 26/128
5.97
2
VDDP 26/128
5.97
3
Vbg 96/128
1.61
4
VDDC 96/128
1.61
5, 6
Temperature Sensor
1
1.21
=
ADC2out
Vin * Gain
CHx
Vlsb
floor (
)
+ 1
=
Vlsb
Vref
256