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ADBMS1818ASWZ-R7 Datasheet(PDF) 25 Page - Analog Devices

No. de pieza ADBMS1818ASWZ-R7
Descripción Electrónicos  18-Cell Battery Monitor with Daisy Chain Interface
PDF  89 Pages
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

ADBMS1818ASWZ-R7 Datasheet(HTML) 25 Page - Analog Devices

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Data Sheet
ADBMS1818
THEORY OF OPERATION
analog.com
Rev. 0 | 25 of 89
Table 18. ADC Range and Resolution
Mode
Full Range1
Specified Range
Precision Range2
LSB
Format
Maximum Noise
Noise Free
Resolution3
26 Hz (Filtered)
–0.8192 V to
+5.7344 V
0 V to 5 V
0.5 V to 4.5 V
100 μV
Unsigned 16 bits
±50 μV p-p
16 bits
1 Negative readings are rounded to 0 V.
2 Precision range is the range over which the noise is less than the maximum noise.
3 Noise free resolution is a measure of the noise level within the precision range.
Figure 55. Timing for ADCV Command Measuring all 18 Cells
Table 19. Conversion and Synchronization Times for ADCV Command Measuring All 18 Cells in Different Modes
Mode
Conversion Times (μs)
Synchronization Time (μs)
t0
t1M
t2M
t5M
t6M
t6C
tSKEW2
27 kHz
0
58
104
244
291
1,121
233
14 kHz
0
87
163
390
466
1,296
379
7 kHz
0
145
279
681
815
2343
670
3 kHz
0
261
512
1263
1513
3041
1252
2 kHz
0
494
977
2426
2909
4437
2415
1 kHz
0
960
1,908
4753
5702
7230
4742
422 Hz
0
1890
3770
9408
11,287
12,816
9397
26 Hz
0
29,818
59,624
149,044
178,851
201,325
149,033
Figure 56. Timing for ADCV Command Measuring 3 Cells
Table 20 shows the conversion time for the ADCV command measuring only 3 cells. t1C indicates the total conversion time for this command.
Table 20. Conversion Times for ADCV Command Measuring 3 Cells in Different Modes
Mode
Conversion Times (μs)
t0
t1M
t1C
27 kHz
0
58
203
14 kHz
0
87
232
7 kHz
0
145
407



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