Datasheet

ADM1175 Data Sheet
Rev. C | Page 4 of 24
Parameter Min Typ Max Unit Conditions
MONITORING ACCURACY
1
Current Sense Absolute Accuracy
0°C to +70°C −1.45 +1.45 % V
SENSE
= 75 mV
−1.8 +1.8 % V
SENSE
= 50 mV
−2.8
+2.8
%
V
SENSE
= 25 mV
−5.7 +5.7 % V
SENSE
= 12.5 mV
0°C to +85°C −1.5 +1.5 % V
SENSE
= 75 mV
−1.8 +1.8 % V
SENSE
= 50 mV
−2.95 +2.95 % V
SENSE
= 25 mV
−6.1 +6.1 % V
SENSE
= 12.5 mV
−40°C to +85°C −1.95 +1.95 % V
SENSE
= 75 mV
−2.45 +2.45 % V
SENSE
= 50 mV
−3.85 +3.85 % V
SENSE
= 25 mV
−6.7 +6.7 % V
SENSE
= 12.5 mV
V
SENSE
for ADC Full Scale
2
105.84 mV
Voltage Sense Accuracy
0°C to +70°C −0.85 +0.85 % V
CC
= 3 V minimum (low range)
−0.9 +0.9 % V
CC
= 6 V minimum (high range)
0°C to +85°C −0.85 +0.85 % V
CC
= 3 V minimum (low range)
−0.9 +0.9 % V
CC
= 6 V minimum (high range)
−40°C to +85°C −0.9 +0.9 % V
CC
= 3 V minimum (low range)
−1.15
+1.15
%
V
CC
= 6 V minimum (high range)
V
CC
for ADC Full Scale
3
Low Range (VRANGE = 1) 6.65 V
High Range (VRANGE = 0) 26.35 V
I
2
C TIMING
Low Level Input Voltage, V
IL
0.3 V
BUS
V V
BUS
= 3.0 V to 5.5 V
High Level Input Voltage, V
IH
0.7 V
BUS
V V
BUS
= 3.0 V to 5.5 V
Low Level Output Voltage on SDA, V
OL
0.4 V I
OL
= 3 mA
Output Fall Time on SDA from V
IHMIN
to V
ILMAX
20 + 0.1 C
BUS
250 ns C
BUS
= bus capacitance from SDA to GND
Maximum Width of Spikes Suppressed by
Input Filtering on SDA and SCL Pins
50 250 ns
Input Current, I
I
, on SDA/SCL When Not
Driving a Logic Low Output
−10 +10 µA
Input Capacitance on SDA/SCL 5 pF
SCL Clock Frequency, f
SCL
400
kHz
Low Period of the SCL Clock 600 ns
High Period of the SCL Clock 1300 ns
ADC Conversion Time
4
150 µs
Fast Overcurrent Response Time
5
4 10 µs
Setup Time for a Repeated Start Condition, t
SU;STA
600 ns
SDA Output Data Hold Time, t
HD;DAT
100 900 ns
Setup Time for a Stop Condition, t
SU;STO
600 ns
Bus Free Time Between a Stop and
a Start Condition, t
BUF
1300 ns
Capacitive Load for Each Bus Line 400 pF
1
Monitoring accuracy is a measure of the error in a code that is read back for a particular voltage/current. This is a combination of amplifier error, reference error,
ADC error, and error in ADC full-scale code conversion factor.
2
This is an absolute value to be used when converting ADC codes to current readings; any inaccuracy in this value is factored into absolute current accuracy values (see
specifications for Current Sense Absolute Accuracy).
3
These are absolute values to be used when converting ADC codes to voltage readings; any inaccuracy in these values is factored into voltage accuracy values (see
specifications for Voltage Sense Accuracy).
4
Time between the receipt of the command byte and the actual ADC result being placed in the register.
5
Guaranteed by design; not production tested.