IN100-Q1-R-RC1F datasheet(24/49 Pages) ETC

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N1EDOC-DS-IN100-EN-V1.3

Figure 3 and Table 1. In addition, the ADC can be used to measure the internal VCC (shown as VBAT

in Figure 9) voltage level or the chip temperature. The required voltage reference (VREF) to the

ADC can be selected from multiple sources, including an on-chip 0.8V reference (V0P8), the VCC

voltage divided by 2, or external channels. The VREF shall not exceed 0.8V. The input voltage

range to the ADC shall be between 0V and 2*VREF.

Figure 9 : Sensor ADC block diagram

4.4.1. On-chip VCC monitoring

Measured at: Ta = 25°C, VCC=3.0V, unless otherwise noted (if On-chip VCC monitoring is used,

VCC should not be greater than 3.0V).

Table 6 : VCC monitoring characteristics

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Resolution

Using on-chip V0P8 as

reference

1.85

mV/LSB

Range

Input to ADC = 0.4*VCC.

Input range of ADC is 0V -

1.6V (FS).

3.6

Accuracy

With VREF calibration only

-3.3

1.1

3.3

With ADC offset and VREF

calibration

-0.9

0.3

0.9

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