(T
A
= -20°C to +125°C, V
DD
= 1.6V to 3.6V, resolution = 10 bits, unless otherwise specified. Limits are 100% tested at T
A
= 25°C. Limits
over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization.)
Note 1: C
B
= total capacitance of one bus line in pF. Tested with C
B
= 400pF.
Note 2: Holding the SCL line low for a time greater than t
TIMEOUT
causes the devices to reset SDA to the idle state of the serial bus
communication (SDA released).
Note 3: LED full-scale current maximum value is subjected to string number, LED number per string, and LX current limit. In SMBus
modes, if the total load is heavier than eight strings with ten WLEDs per string at 25mA LED current, upon step-up regulator
input VS removal, an OC fault may occur, resulting in SMBus status register OV_CURR and FAULT bits being set to 1 and
violating SMBus specifications.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Transmit SDA Fall
Time
t
F
Note 1
20 x
(V
DD
/5.5V)
150
ns
V
DD
≥ 1.8V. Note 1.
20 x
(V
DD
/5.5)
120
Bus capacitance = 550pF. V
DD
≥ 2.4V
20 x
(V
DD
/5.5V)
120
SCL Time Low for
Reset of Serial
Interface
t
TIMEOUT
Note 2 20 45 ms
Power Supply
Operating Supply
Voltage Range
1.6 3.6 V
Conversion Power
Supply Current
Active temperature conversions, I
2
C inactive 80 150 µA
Average Power
Supply Current
I
2
C inactive, 0.25 conversions/s, 10-bit (0.25°C)
resolution
1.1
µA
I
2
C inactive, 4 conversions/s, 10-bit (0.25°C)
resolution
9.8 24
Standby Supply
Current
In Standby and between conversions, I
2
C bus
inactive, bus timeout disabled.
0.5 3 µA
In Standby and between conversions, I
2
C bus
inactive, bus timeout enabled.
0.7 3.5 µA
Electrical Characteristics (continued)
www.maximintegrated.com
Maxim Integrated
│
4
MAX31875 Low-Power I
2
C Temperature
Sensor in WLP Package
