EMC1822 datasheet(24/103 Pages) MICROCHIP

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Conversion Rate

Average Supply Current

Averaging Factor (based on 11-bit operation)

Dynamic Averaging State

Enabled (default)

Disabled Enabled (default)

Disabled

8/s

790 µA

16/s

830 µA

32/s

830 µA

64/s

1065 µA

0.5x

7.11

Digital Filter

To reduce the effect of noise and temperature spikes on the reported temperature, the External Diode

channel uses a programmable digital filter. This filter can be configured as Level 1, Level 2, or Disabled

(default). The typical filter performance is shown in the figures below. The Filter Configuration register

controls the digital filter on the External Diode 1 channel.

To reduce complexity, the digital filter only applies to the External Diode channel 1 and 2. Furthermore,

this is only the case when APD is not enabled for a given channel. It applies after the digital block has

taken the appropriate 11 bits based on the dynamic averaging.

Table 7-6. Filter Settings

FILTER<1:0>

Averaging

Disabled (default)

Level 1 (Note 1)

Level 2 (Note 2)

Note:

Filtering Level 1 corresponds to 4x attenuation of a temperature spike.

Filtering Level 2 corresponds to 8x attenuation of a temperature spike.

Figure 7-3. Temperature Filter Step Response

Samples

Disable

Level 2

Level 1

Multi-Channel Low Voltage Temp Sens...

System Block Diagram

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