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TDA7803A-QLX bảng dữ liệu(PDF) 33 Page - STMicroelectronics

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TDA7803A-QLX bảng dữ liệu(HTML) 33 Page - STMicroelectronics

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TDA7803A
Functional description
71
Figure 37. Thermal muting diagram
6.8
Voltage monitoring feature and ADC characteristics
Through this feature it is possible to monitor the VCC value on I2C data line; below a short
description of the limits, granularity, frequency of operation of this function.
The result of VCC sensing voltage range is 5 V - 19 V; the Vcc - ADC value conversion is
expressed in the table below. The VCC sensing voltage range is 5 V - 19 V (with a typical
reset intervention at 4.8 V), with a precision of 200 mV effective (considering 1 bit of noise).
The output update frequency is 2 MHz.
So, in order to exploit this function, the user should address only the DB7 with the following
subaddress: 'I0011010' (*) and then read the data contained in DB7.
(*) 'I' is the auto increment bit.
The VCC value is expressed by 8 bits binary code:
GAPGPS00811
Vout
Vout
Tj (C)
Tj (C)
TW4
TW3
TW2
TW1
TPL
TPL
TPH
TPH
Table 8. VCC value express by 8 bit with thermometric code
VCC
ADC value
5 V
01000001
6 V
01010000
7 V
01011101



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