JAJSGV4D July 2015 – February 2019 TPS65917-Q1
PRODUCTION DATA.
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The features of the GPADC include the following:
The GPADC consists of a 12-bit sigma-delta ADC combined with a 8-input analog multiplexer. The running frequency of the GPADC is 2.5MHz. The GPADC lets the host processor monitor analog signals using analog-to-digital conversion on the input source. After the conversion is complete, an interrupt is generated to signal the host processor that the result of the conversion is ready to be accessed through the I2C interface.
The GPADC supports 8 analog inputs. Two of these inputs are available on external pins and the remaining inputs are dedicated to VSYS supply voltage monitoring and internal resource monitoring.
Figure 5-15 shows the block diagram of the GPADC.
The conversion requests are initiated by the host processor either by software through the I2C or by periodical measurements.
Two kinds of conversion requests occur with the following priority:
Table 5-9 lists the GPADC channel assignments.
Use Equation 3 to convert from the GPADC code to the internal die temperature using GPADC channels 5 and 6.
CHANNEL | TYPE | INPUT VOLTAGE
FULL RANGE (1) |
INPUT VOLTAGE
PERFORMANCE RANGE(2) |
SCALER | OPERATION |
---|---|---|---|---|---|
0 (ADCIN1) | External(3) | 0 to 1.25 V | 0.01 to 1.215 V | No | General purpose |
1 (ADCIN2) | External(3) | 0 to 1.25 V | 0.01 to 1.215 V | No | General purpose |
2 | Reserved | ||||
3 (VCC_SENSE) | Internal | 2.5 to 5 V when HIGH_VCC_SENSE = 0
2.3 V to (VCCA – 1 V) when HIGH_VCC_SENSE = 1 |
2.5 to 4.86 V when HIGH_VCC_SENSE = 0
2.3 V to (VCCA – 1 V) when HIGH_VCC_SENSE = 1 |
4 | System supply voltage (VCC_SENSE) |
4 | Internal | 0 to 1.25 V | No | DC-DC current probe | |
5 | Internal | 0 to 1.25 V | 0 to 1.215 V | No | PMIC internal die temperature 1 |
6 | Internal | 0 to 1.25 V | 0 to 1.215 V | No | PMIC internal die temperature 2 |
7 | Internal | 0 to VCCA V | 0.055 to VCCA V | 5 | Test network |