Datasheet

MAX34408/MAX34409 SMBus Dual/Quad Current Monitor
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Table 12. OVER_CURRENT_THRESHOLD_1/2/3/4 (08h/09h/0Ah/0Bh)—R/W Byte
Table 13. Overcurrent Threshold Register Configuration Formula
Table 14. Overcurrent Threshold Register Example
OVER_CURRENT_THRESHOLD_1/2/3/4 (08h/09h/0Ah/0Bh)
The OVER_CURRENT_THRESHOLD_1/2/3/4 command sets the overcurrent threshold for each channel. The
OVER_CURRENT_THRESHOLD_1/2/3/4bytecommandisdescribedinTable 12. See Table 13 for the configura-
tion formula and Table 14 for an example.
DEVICE_ID_&_REVISION (0Ch)
The DEVICE_ID_&_REVISION command returns a fixed device ID and a factory programmed revision. The
DEVICE_ID_&_REVISIONbytecommandisdescribedinTable 15.
Table 15. DEVICE_ID_&_REVISION (0Ch)—Read Byte
BIT BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
NAME OCT7 OCT6 OCT5 OCT4 OCT3 OCT2 OCT1 OCT0
POR 1 1 0 1 0 0 0 1
Note: IntheMAX34408,OCT3andOCT4canbewrittentoandreadfrombuttheyhavenoaffectonthedevice.
BIT NAME DESCRIPTION
7:0
OCT7 to
OCT0
These bits select the digital overcurrent threshold for each channel. The formula for selecting the
thresholdisasshowninTable13.IfthethresholdissettoFFh,thedigitalcomparatorisdisabledand
the output of the comparator is unconditionally deasserted.
Overcurrent Threshold
Analog Voltage at the
IN+/IN-Pins
÷ 0.01225 =
RatiotoFull
Scale
x 256 =
Rounded
Decimal
Value
=
Overcurrent Threshold
RegisterSetting
10mV ÷ 0.01225 = 0.816 x 256 = 209 = D1h
BIT BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
NAME ID4 ID3 ID2 ID1 ID0 REV2 REV1 REV0
POR 0 0 0 0 1 Factory set
BIT NAME DESCRIPTION
7:3 ID4 to ID0 Thesebitsreportthedeviceidentication(ID).TheIDisxedat01h.
2:0 REV2toREV0 These bits report the device revision. The device revision is factory set.