AMC7834 Datasheet, PDF (32/93 Pages) Texas Instruments – AMC7834 12-Bit Integrated Power-Amplifier Monitor and Control System with Temperature, Current and Voltage Supervision Capabilities

AMC7834
SLAS972B – NOVEMBER 2014 – REVISED MARCH 2016
200 µs
1 ms
1 ms
TEMPERATURE
SLOT
24 µs
1
2
3
4
5
6
LT
7
8
9
10
11
12
13
VOLTAGE
SLOT
16 µs
CAL
ADCEXT1
ADCEXT2
ADCEXT3
ADCEXT4
CAL
ADCINT1
ADCINT2
ADCINT3
ADCINT4
CAL
ADCEXT1
ADCEXT2
8 ms
14
RT1
to
RT-SET = 000
47
48
ADCINT2
49
ADCINT3
50
ADCINT4
51
CAL
52
ADCEXT1
53
ADCEXT2
8 ms
54
RT2
to
87
RT-SET = 000
88
ADCINT2
89
ADCINT3
90
ADCINT4
CURRENT
SLOT
160 µs
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
CS[1-4] CS-FILTER = 000
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CS[1-4]
CS[1-4]
CS[1-4]
CS[1-4]
CS[1-4]
CS[1-4]
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CS-FILTER = 000
CS-FILTER = 000
CS-FILTER = 000
CS-FILTER = 000
CS-FILTER = 000
CS-FILTER = 000
CS[1-4]
CS[1-4]
CS[1-4]
CS-FILTER = 000
CS-FILTER = 000
CS-FILTER = 000
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Figure 48. ADC General Interleaved Sequence
Each ADC interleave step takes 200 µs and is segmented intro three sensing slots: temperature, voltage and
current. The temperature slot is 24 µs long and allocates the temperature sensing channel conversions (internal
temperature sensor and two remote temperature sensors) following the order LT → RT1 → RT2 → LT → ... If
one of the temperature channels is not selected for conversion it is skipped. For example, if RT1 is not selected
for conversion, the temperature slot conversion sequence is LT → RT2 → LT → ... Figure 48 illustrates the
conversion sequence for the lowest remote temperature sensor update time, which is configured by setting RT-
SET[2:0] = 000 in register 0x10. If a longer temperature sensor is selected to improve measurement accuracy a
higher number of interleave steps is allocated for the remote temperature sensors.
32
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