AMC7834 Datasheet, PDF (43/93 Pages) Texas Instruments – AMC7834 12-Bit Integrated Power-Amplifier Monitor and Control System with Temperature, Current and Voltage Supervision Capabilities

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AMC7834
SLAS972B – NOVEMBER 2014 – REVISED MARCH 2016
7.3.6.7 Hysteresis
If a monitored signal is out of range and the alarm is enabled, the corresponding alarm bit is set to 1. However,
the alarm condition is cleared only when the conversion result returns either a value lower than the high
threshold register setting or higher than the low threshold register setting by the number of codes specified in the
hysteresis setting (Figure 59). The hysteresis registers (address 0x50 through 0x56) store the hysteresis value
for the programmable alarms. The hysteresis is a programmable value between 0 LSB to 127 LSB for the
internal ADC monitoring and current-sense alarms and 0°C to 31°C for the temperature-sensor alarms.
High Threshold
Hysteresis
Low Threshold
Hysteresis
Over High Alarm
Below Low Alarm
Figure 59. Device Hysteresis
7.3.6.8 False-Alarm Protection
To prevent false alarms, an alarm event is only registered when the monitored signal is out of range for an N
number of consecutive conversions. If the monitored signal returns to the normal range before N consecutive
conversions, an alarm event is not issued. The false alarm factor, N, can be configured in the AMC configuration
1 register (address 0x11).
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