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ADS7142 Datasheet(PDF) 37 Page - Texas Instruments

Part # ADS7142
Description  Nanopower, Dual-Channel, Programmable Sensor Monitor
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ADS7142 Datasheet(HTML) 37 Page - Texas Instruments

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High Threshold
High Threshold - Hysteresis
Sets the Output of the
Comparator
Device Starts storing data in
buffer and sets the Latched flag
and alert pin after count(=4) is
reached
Conversion [0] for CHx
Conversion [N+ 15] for CHx
Hysteresis
Conversion [N] for CHx
Conversion [N + 15] for CHx
Conversion [N + 14] for CHx
Conversion [N] for CHx
Data Buffer
SEQ_START bit is set
by user
BUSY/RDY
Time
tCC
Device stops conversions and
stops storing data in buffer after
the data buffer is filled
High Threshold
Sets the Output of the
Comparator
Device Starts storing data in
buffer and sets the Latched flag
and alert pin after the count is
reached
Conversion [0] for CHx
Conversion [N+ 14] for CHx
Conversion [N] for CHx
Conversion [N + 15] for CHy
Conversion [N + 14] for CHx
Conversion [N] for CHx
Data Buffer
SEQ_START bit is set
by user
BUSY/RDY
Time
Device stops conversions and
stops storing data in the buffer
after the data buffer is filled
Conversion [1] for CHy
Conversion [N+1] for CHy
Conversion [N+ 15] for CHy
Conversion [N + 1] for CHy
tCC
CHx is the channel which first triggered the ALERT
37
ADS7142
www.ti.com
SBAS773A – SEPTEMBER 2017 – REVISED DECEMBER 2017
Product Folder Links: ADS7142
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
7.4.3.1.2
Autonomous Mode with Post Alert Data
In this mode, the device captures the next sixteen conversion results after the Alert is active. Once these sixteen
conversions are stored in the data buffer, all conversion stops. For this mode, Set DATA_BUFFER_OPMODE to
110b. In this mode, the device starts converting the data on setting the SEQ_START bit and stores the data in
the data buffer when one of the digital comparator flags is set after the crossing a high threshold or a low
threshold for the channels selected in the sequence. if the SEQ_ABORT bit is set before the data buffer is filled,
the device aborts the sequence and stops storing the conversion results.
Figure 60 and Figure 61 illustrates the filling of the data buffer in autonomous mode with Post Alert Data.
Figure 60. Post Alert Data for Single Channel
Configurations
Figure 61. Post Alert Data for Dual Channel
Configuration


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