MAX16031_10 Datasheet, PDF (18/41 Pages) Maxim Integrated Products – EEPROM-Based System Monitors with Nonvolatile Fault Memory

EEPROM-Based System Monitors
with Nonvolatile Fault Memory
a -1V differential input (range of 5.6V) gives a decimal
code of -183, which is 1101001001 in two’s comple-
ment binary form. In single-ended mode, conversions
are performed between a single input and ground.
When single-ended mode is selected, conversions are
always unipolar regardless of r1Ch[7:4]. The single-
ended and pseudo-differential ADC mode equations
are shown below.
Unipolar single-ended mode:
X _ADC
=
INT
⎛
⎝⎜
V_IN−
V_RANGE
×
⎞
1024_⎠⎟
where X_ADC is the resulting code in decimal, V_IN- is the
voltage at a voltage monitoring input, and V_RANGE is
the selected range programmed in r17h and r18h.
Bipolar/unipolar pseudo-differential mode:
⎛
X_ADC = INT _⎝⎜
V_IN+
V_RANGE
⎞
× 1024_⎠⎟
−
INT
⎛
⎝⎜
V_IN−
V_RANGE
⎞
× 1024
⎠
where X_ADC is the resulting code in decimal, V_IN+ is the
voltage at a positive input of a differential voltage moni-
toring input pair, V_IN- is the voltage at a negative input of
a differential voltage monitoring input pair, and V_RANGE
is the selected ADC IN_ voltage range programmed in
r17h and r18h.
Table 3. IN1–IN8 ADC Input Mode Selection
REGISTER
ADDRESS
1Ch
EEPROM
MEMORY
ADDRESS
9Ch
BIT RANGE
DESCRIPTION
IN1/IN2 Single-Ended/Pseudo-Differential:
[0]
0 = IN1 and IN2 conversions are single-ended.
1 = IN1 and IN2 conversions are pseudo-differential (IN1 to IN2).
IN3/IN4 Single-Ended/Pseudo-Differential:
[1]
0 = IN3 and IN4 conversions are single-ended.
1 = IN3 and IN4 conversions are pseudo-differential (IN3 to IN4).
IN5/IN6 Single-Ended/Pseudo-Differential:
[2]
0 = IN5 and IN6 conversions are single-ended.
1 = IN5 and IN6 conversions are pseudo-differential (IN5 to IN6).
IN7/IN8 Single-Ended/Pseudo-Differential:
[3]
0 = IN7 and IN8 conversions are single-ended.
1 = IN7 and IN8 conversions are pseudo-differential (IN7 to IN8).
IN1/IN2 Unipolar/Bipolar:
[4]
0 = IN1 and IN2 conversions are unipolar.
1 = IN1 and IN2 conversions are bipolar (two’s complement).
IN3/IN4 Unipolar/Bipolar:
[5]
0 = IN3 and IN4 conversions are unipolar.
1 = IN3 and IN4 conversions are bipolar (two’s complement).
IN5/IN6 Unipolar/Bipolar:
[6]
0 = IN5 and IN6 conversions are unipolar.
1 = IN5 and IN6 conversions are bipolar (two’s complement).
IN7/IN8 Unipolar/Bipolar:
[7]
0 = IN7 and IN8 conversions are unipolar.
1 = IN7 and IN8 conversions are bipolar (two’s complement).
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