TLE 7810G Infineon Technologies, TLE 7810G Datasheet - Page 17

• Manufacturer Part Number: TLE 7810G
• Manufacturer: Infineon Technologies

Specifications of TLE 7810G

• Packages: PG-DSO-28
• Flash: 16.0 kByte
• Frequency (f): 24.0 MHz
• High Side Switch: 1
• High Voltage Monitor Input: 5
• Gpio: 8

6
The SBC measurement interface comprises a battery measurement unit (high voltage input
chip temperature sensor. A multiplexer is used to select the desired input channel that is connected to the ADC of
the μC. This multiplexer is controlled via the SPI interface. Also, the reference voltage
SBC. The
terminal 30.
Figure 9
6.1
The input voltage is filtered and scaled down to the input voltage range of the ADC converter. The voltage
measurement output code of the ADC can be calculated using the following equation, where
at the pin
The input voltage corresponding to the ADC output code
6.1.1
Best measurement accuracy can be obtained by applying the calibration function:
C
coefficients c
During the production test these calibration figures are calculated and stored in the flash memory of the
microcontroller.
Data Sheet
C
V
C
VSENS
SENS
VSENS
VSENSCAL
=
represents the ADC output code for the analog input voltage at the pin
VBAT_SENSE
=
V
8
------------------------ -
V
round
BAT_SENSE
2
×
bat_sense
=
Voltage Measurement Calibration Concept
ADC Measurement Interface
Simplified Block Diagram of ADC Measurement Interface
Voltage Measurement
1
N
V
and c
round c
–
AREF
1
V
--------------- -
V
input must be protected against voltage transients, like ISO pulses by a resistor in series to
0
×
SENS
AREF
and N the resolution of the ADC:
[
correct for slope variations and offset errors of the measurement transfer function.
C
VSENS
1
(
Temperature
Attenuator
1
-- - 2
8
C
On-Chip
Voltage
Sensor
(
VSENS
N
–
1
–
) , 0V
c
0
)
Selection
]
Mode
Mux
≤
V
SENS
≤
V
bat f – s
17
ADC Driver
Amplifier
C
VSENS
can be calculated with the following equation:
SBC
VA
VAREF
AGND
μC
P2.7
ADC Measurement Interface
V
BAT_SENSE
V
AREF
Rev. 3.01, 2008-04-15
ADC
V
V
bat_sense
is provided by the
SENS
. The correction
TLE7810G
is the voltage
) and an on-
CA
(1)
(2)
(3)